Service Manual 1780R-Series Video Measurement Set SN B030000 & Up 070-8030-01 This document supports firmware version 1.16 and above. Warning The servicing instructions are for use by qualified personnel only. To avoid personal injury, do not perform any servicing unless you are qualified to do so. Refer to all safety summaries prior to performing service.
Copyright © Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved. Printed in the U.S.A. Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000 TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Service Assurance If you have not already purchased Service Assurance for this product, you may do so at any time during the product’s warranty period. Service Assurance provides Repair Protection and Calibration Services to meet your needs. Repair Protection extends priority repair services beyond the product’s warranty period; you may purchase up to three years of Repair Protection.
WARRANTY Tektronix warrants that the products that it manufactures and sells will be free from defects in materials and workmanship for a period of three (3) years from the date of shipment. If a product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product.
Table of Contents General Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Service Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi xiii xv Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1 CRT Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents Operating Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–27 Front-panel Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Functional Measurement Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–28 2–31 Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Schematic Diagrams . . . . . . . . . . . . .
Table of Contents Adjustment Procedures General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Recommended Equipment List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjustment List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents Options CRT Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Cord Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents List of Figures Figure 1–1: Simplified representation of the 1780R-Series Video Measurement Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 2–1: Rear panel for the Tektronix 1780R-Series Measurement Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 2–2: Settings for the rear-panel mains selector switch . . . . . .
Table of Contents Figure 4–1: 5% signal Attenuator for checking differential gain . . . . Figure 4–2: Rear view of the X Y plug connections. (Pins 2, 4, 6, 10, 12, and 14 can be used to make ground connections.) . . . . . . . Figure 4–3: REMOTE connector modified for Remote Sync input . . Figure 4–4: RGB Parade Display Test Connector . . . . . . . . . . . . . . . . Figure 4–5: Initial equipment hook-up for the Performance Check Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents Figure 5–11: Adjustment locations on the Vectorscope circuit board (Assembly A6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 5–12: Connections for adjusting the calibrator amplitude . . . Figure 5–13: Input & BNC circuit board (A8) adjustments, shown as they would appear with the instrument on its left side . . . . . . . . . Figure 5–14: Test equipment connections for matching CH A and CH B1 input gains. . . . . . . . . . . . . . . . . . . .
Table of Contents List of Tables viii Table 1–1: Input/Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 1–2: Waveform Monitor Vertical System . . . . . . . . . . . . . . . . . Table 1–3: Waveform Monitor Probe Input . . . . . . . . . . . . . . . . . . . . Table 1–4: Waveform Monitor Horizontal Deflection System . . . . . . Table 1–5: Waveform Monitor dG and dP Display . . . . . . . . . . . . . . . Table 1–6: Synchronization . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents 1780R-Series Service Manual Table 5–1: Recommended Equipment . . . . . . . . . . . . . . . . . . . . . . . . . Table 5–2: 1780R-Series Adjustments for Calibration Procedure . . Table 5–3: 1780R-Series Initial Control Settings . . . . . . . . . . . . . . . . . Table 5–4: Low Voltage Power Supply Tolerance . . . . . . . . . . . . . . . . 5–4 5–8 5–12 5–14 Table 6–1: Static Susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 6–2: Test Selectable Components .
Table of Contents x 1780R-Series Service Manual
General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified. Only qualified personnel should perform service procedures. To Avoid Fire or Personal Injury Use Proper Power Cord. Use only the power cord specified for this product and certified for the country of use. Connect and Disconnect Properly.
General Safety Summary Symbols and Terms Terms in this Manual. These terms may appear in this manual: WARNING. Warning statements identify conditions or practices that could result in injury or loss of life. CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property. Terms on the Product. These terms may appear on the product: DANGER indicates an injury hazard immediately accessible as you read the marking.
Service Safety Summary Only qualified personnel should perform service procedures. Read this Service Safety Summary and the General Safety Summary before performing any service procedures. Do Not Service Alone. Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present. Disconnect Power. To avoid electric shock, disconnect the mains power by means of the power cord or, if provided, the power switch.
Service Safety Summary xiv 1780R-Series Service Manual
Preface This Service Manual is part of a 2-volume set. Its companion manual is the Operator’s Manual, which is aimed primarily at operating personnel. Information in this volume is intended for those who are required to maintain the 1780R-Series Video Measurement Set. Specific instructional procedures can be found in the Performance Check, Adjustment Procedures, Maintenance and Installation sections.
Preface xvi 1780R-Series Service Manual
Product Description The Tektronix 1780R-Series Video Measurement Set is a 19-inch wide, 5 1/4-inch high, 18-inch deep dual-CRT Waveform Monitor/Vectorscope. It weighs approximately 28 pounds and is intended for rack-mount applications, but can also be configured as a full (rack) width cabinet model for bench and portable applications. See Figure 1–1. The remainder of the front-panel area contains controls and switches that manually configure the instrument for measurements.
Product Description signals. The probe input has gain and input compensation for both X1 and X10 probes. The instrument control system is based on a National Semiconductor 32CG16 Microprocessor, with an additional line rate processor that makes line-by-line measurement decisions. Front-panel switching and CRT touch-screen selections are acted upon by the processors.
Specifications This section of the manual contains the specifications for the 1780R-Series. Tabular information is divided into two categories. First there are the Performance Requirements which is assured by Tektronix Inc. Second are the items in the Supplemental Information column, which due to a number of reasons may be only typical numbers or could vary slightly from one instrument to the next. The Performance Verification is provided to verify listed Performance Requirements.
Specifications Table 1–1: Input/Output Characteristic Performance Requirement Supplemental Information Performance Check Step Vertical Ranges Volts Full Scale 1.0 Accuracy 1.0 V ±0.007 V. Var Peak-to-peak Amplitude for Full Graticule 1.0 volt/140 IRE. 4 ≤0.5:1 to ≥1.5:1 (0.67 V to 2.0 V input signal can be made full scale). 5 Input Gain Ratios A to B 1 to 1 ±0.002 (0.998 – 1.002). 10 Auxiliary Video Input to A Input 1.5 dB ±0.3 dB. 10 Input A to Auxiliary Video Output 1 to 1 ±0.005 (0.
Specifications Table 1–2: Waveform Monitor Vertical System Performance Requirement Supplemental Information Performance Check Step CH A, B1, B2, or B3 >40 dB DC to 5 MHz. (Terminated in 75 W.) 58 Aux Video In, Aux Video Out, & Pix Mon Out >34 dB DC to 5 MHz. Instrument On only. 58 Ext. Sync Input >46 dB to 5 MHz. Characteristic Return Loss 58 Loop-Through Isolation >80 dB at FSC, between channels and each channel and EXT REF. Measured externally.
Specifications Table 1–2: Waveform Monitor Vertical System (Cont.) Characteristic Performance Requirement Supplemental Information Performance Check Step DC Restorer Clamp Point Backporch or Sync Tip. (All clamps controlled together.) 21 Attenuation ≤10%. 22 NTSC = 1 IRE. PAL = ≤7 mV. 24 Adjusted to minimize luminance r m e gain error err r at 1 V to chrominance Full Scale, typically ≤0.5%. 19 Typically within 30 mV. 8 1 V peak-to-peak common mode signal. s . 26 Mains Hum Atten.
Specifications Table 1–2: Waveform Monitor Vertical System (Cont.) Characteristic Performance Requirement Supplemental Information >40 dB at 3.58 MHz (4.43 MHz PAL). 5 step, 20 IRE staircase within 2% of flat display. Performance Check Step Diff Steps (Differentiated Steps Attenuation) 27 Vertical Gain increase approx. 5X to compare staircase risers. Noise Measurements Accuracy To 56 dB within 1 dB; 60 dB within 2 dB. Offset Accuracy To 56 dB within 0.5 dB; 60 dB within 1 dB.
Specifications Table 1–3: Waveform Monitor Probe Input Characteristic Performance Requirement Supplemental Information Input Resistance 1 MW. Input RC Product 20 ms (20 pF). Performance Check Step Unity ±3%. With gain adjusted for equivalent 1 V peak-to-peak display. 30 ±3%. Referenced to 50 kHz. 17, 18 Less than 5% on 50 Hz square wave. Fast DC Restorer eliminates low frequency tilt on a comp video signal. 32 Waveform 50% Duty Cycle square wave. 31 Period 4 horizontal lines.
Specifications Table 1–4: Waveform Monitor Horizontal Deflection System (Cont.) Characteristic Performance Requirement Supplemental Information Performance Check Step Sweep Linearity 1 Line (5 ms/Div.) ±1%. 2 Line (10 ms/Div.) ±1%. 3 Line (15 ms/Div.) ±1%. 1-Field Sweep ±0.5 division. 2-Field Sweep ±0.5 division. 3-Field Sweep ±0.5 division. Slow Sweep ±5% of full screen over the length of the sweep. 34 Magnified Sweep Accuracy X5 (1 ms/Div.) ±1%. X10 (0.5 ms/Div.) ±2%. X20 (0.
Specifications Table 1–4: Waveform Monitor Horizontal Deflection System (Cont.) Characteristic Performance Requirement Supplemental Information Staircase Input Amplitude A +10 V input will result in a horizontal display of 9 divisions ±1.4 major divisions. Ground to +10 V. +10 V corresponds to left side of CRT. Staircase Operating Signal DC Signal levels plus peak AC, not to exceed _–12 to +12 V. Max AC Signal Volts 12 V peak-to-peak.
Specifications Table 1–5: Waveform Monitor dG and dP Display Characteristic Performance Requirement Supplemental Information Deflection Factor 5% dG deflects the trace 50 IRE (NTSC) or 500 mV (PAL) ±5%. Waveform gain X1, Var. Gain off. Vector gain adjusted to place chroma at compass rose. Residual dG (10 – 90% APL) ≤0.2%, last 90% of trace. Performance Check Step Differential Gain Calibrated dG Resolution 0.1%. Accuracy 0.1% ±10% of reading. Range ±5%. 39 39 CRT readout.
Specifications Table 1–6: Synchronization Characteristic Performance Requirement Supplemental Information Ref. Sync Separator 0.2 to 2.0 V peak-to-peak composite video. Composite video applied to Inputs A, B1, B2, or B3 or probe. Int. Sync Separator 0.5 to 2.0 V peak-to-peak composite video. Performance Check Step Sync Input Internal 42 42 External Black Burst –14 dB to +6 dB. Black Burst signal of 0.2 to 5 times amplitude applied to EXT SYNC input. 43 Composite Sync 0.2 to 8.
Specifications Table 1–6: Synchronization (Cont.) Characteristic Performance Requirement Jitter from missing line sync pulses Supplemental Information Performance Check Step <15 ns per missing sync pulse. Maximum of 10 consecutive line sync pulses. Slow Sweep Triggering Signal APL change from 10% to ≤90%. Sensitivity 0.4 V to 2.0 V peak-to-peak composite video with APL change. Rate 0.2 Hz. Free runs at rates less than 0.2 Hz or with no triggering signal. 2.0 to 5.0 V square wave, or 4.
Specifications Table 1–7: Vectorscope Vector Display (Cont.) Characteristic Performance Requirement Supplemental Information Performance Check Step ±1.25_. Measured with color bar signal. 49 Display Vector Phase Accuracy ±2.5% (1.25 IRE). Vector Gain Accuracy Quadrature Phasing ±0.5_. Subcarrier Regenerator Pull-In Range (NTSC) ±50 Hz of FSC. (PAL) ±10 Hz of FSC. Pull-In Time PAL instruments are tested to b typically y y lock to within 10 Hz, but 50 Hz.
Specifications Table 1–7: Vectorscope Vector Display (Cont.) Characteristic Performance Requirement Supplemental Information Variable GAIN Range +14 dB to –6 dB of 75% color bar preset gain. Unterminated color bar signal can be brought to appropriate targets. Burst from a triple terminated signal can be moved to the compass rose. Max Gain Variable GAIN Phase Shift Performance Check Step 52 >X5. ±1_ as gain is varied from +3 dB to – 6 dB.
Specifications Table 1–9: Vectorscope SCH Phase Display (Cont.) Characteristic Performance Requirement Input Timing Supplemental Information Performance Check Step Correct relative SCH operation with displayed video delayed up to 2 ms or advanced up to 1.5 ms relative to external reference. Display Range Ext Reference 360_. Int Reference ±70_. Typically >80_.
Specifications Table 1–11: Power Requirements (Cont.) Characteristic Performance Requirement ≥1.3. Crest Factor Power Consumption Supplemental Information Performance Check Step 120 Watts maximum. Table 1–12: Environmental Summary Characteristic Performance Requirement Temperature Operating 0_ C to +50_ C. Non-Operating 55_ C to +75_ C. Altitude Operating To 15,000 feet (4.5 km) maximum. Non-Operating To 50,000 feet (15 km) maximum. Vibration Operating 0.015 inch (0.
Specifications Table 1–14: Certifications and Compliances EC Declaration of Conformity – EMC Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility.
Installation Overview This section provides information on both mechanical and electrical installation of the 1780R-Series Video Measurement Set. Be sure to read this material prior to physically mounting the instrument in either a rack mount or portable configuration. Packaging Accessories The shipping carton and pads provide protection for the instrument during transit, and should be retained in case subsequent shipment becomes necessary.
Installation In addition to the standard accessories in Table 2–1 there are a number of optional accessories that can be purchased, such as a portable case, maintenance kits, etc., to complement the 1780R-Series Video Measurement Set. For more information contact a Tektronix Inc. field office or distributor. Table 2–2 is a partial list of optional accessories that are available for the 1780R-Series instruments.
Installation Figure 2–1: Rear panel for the Tektronix 1780R-Series Measurement Set EXT REF. High impedance bridging loop through connector for either composite sync or black burst. AUX IN. 75 W input for video signals. Insertion point follows the internal filters. AUX OUT. 75 W video signal output just prior to the filters. Can be used with the AUX IN to design custom filters. PIX MON.
Installation Installation Requirements The 1780R-Series is designed for efficient use of rack space. It can be mounted flush with other equipment, eliminating the need for air circulation above and below the cabinet. It should not be mounted flush with equipment that is a significant heat source, because heat conducted through the cabinet can raise the internal temperature of the instrument beyond its ability to cool itself.
Installation Figure 2–2: Settings for the rear-panel mains selector switch Operating Options In addition to being able to configure the 1780R-Series through user interaction with a series of CRT-presented menus, there are some specific operating situations that can be selected by changing internal plug jumpers or Dual-InlinePackage (DIP) switches. These provide for some specific conditions that are not anticipated to change on a regular basis.
Installation Table 2–3: Plug Jumpers for Waveform Board (Assembly A2) (Schematic Diagrams 3 through 15) Jumper Number J192 <9> J585 <10> J858 <9> Plug Position Purpose Remote Sync Polarity 1-2 { Positive 2-3 Negative 1-2 3-Step RGB Parade 2-3 { 4-Step YRGB Parade 1-2 { Normal 2-3 Sound-in-Syncs 1-2 NTSC (1780R) 2-3 PAL (1781R) 1-2 { Reference as source 2-3 Input Signal as source 1-2 { & 1-2 { Reference as source 2-3 & 2-3 Input Signal as source RGB YRGB Sound-in-Syncs J694 <10
Installation Table 2–4: Plug Jumpers and DIP Switch on the Microprocessor Board (Assembly A5) (Schematic Diagrams 16 through 19) Jumper Number J342 <16> J344 <16> J453 <17> S385 <19> Name Plug Position Purpose mProcessor Restart Removed { Normal operation Maintenance } Installed Non-maskable interrupt to processor mProcessor Reset Removed { Normal operation Maintenance } Momentary Closure Resets processor (Used with a factory startup DEBUG program) RAM Part Selection Removed { 128 K RAM
Installation Table 2–5: Plug Jumpers for Vectorscope Board (Assembly A6) and Oscillator Board (Assembly A7) (Cont.) Jumper Number J320 (A7) <34> { Floating Video Input Connectors Name Plug Position Purpose Diff Phase Display 1-2 { Double (H)/4 2-3 Single (V)/2 Factory installed position. The video input connectors can be isolated from ground to increase hum rejection.
Installation REMOTE Connector The rear-panel REMOTE connector is a subminiature 15-pin D-type receptacle with female contacts. All the active remote control lines can be forced low by remote ground closures or TTL levels. Pin assignments for the REMOTE connector are shown in Figure 2–4. Figure 2–4: Remote connector and the function of each pin.
Installation SERIAL Interface Connector The rear-panel SERIAL interface connector is a 9-pin, sub-miniature, D-type connector. It is used as an RS422A or RS232D interface to the 1780R-Series microcontroller, drivers for both interfaces are resident. RS422A is a balanced voltage digital interface, while RS232D is a serial binary data interchange. Figure 2–5 shows the rear-panel SERIAL connector pin assignments.
Installation (of the 9-pin male connector) and pin 7 (of the 25-pin female connector). In addition, pins 4 and 5 and pins 6, 8, and 20 of the 25-pin connector will need to be wired together. See Figure 2–6. Figure 2–6: RS232D serial interface adapter diagram Command Set The command set for the the 1780R-Series SERIAL interface is shown in Table 2–6.
Installation Responses from the 1780R-Series SERIAL interface are shown in Table 2–7. Table 2–7: Serial Remote Responses XY INPUT Connector Command Description A The transmission was successful (ACK) C Command not known. (The # character was received, but was not followed by a U, u, D, d, P, or p.) D Bad data received (all expected data consists of ASCII printable characters). H Bad internal checksum. N Bad transmission checksum (NACK) T Timed out (the process took too long to complete).
Installation 15 9 8 1 Figure 2–7: Rear-panel XY connector diagram showing the function of each pin Mechanical Installation All qualification testing for the 1780R-Series was performed with the rackmount cabinet installed. To guarantee compliance with specifications, the instrument should be operated in a cabinet, either the rack-mount cabinet or the portable case (1780F02). The 1780F02 case has a handle and front and back covers.
Installation Rack Mounting The 1780R-Series The 1780R-Series rack-mounting cabinet is designed for permanent mounting. The instrument slides in and out of the cabinet with relative ease. The instrument is secured in the cabinet with four 6–32 TORXR drive screws. See Figure 2–8. Figure 2–8: Location of the four screws that secure the instrument to rack mounting cabinet or portable case WARNING. Do not attempt to carry a cabinetized instrument without installing the rear-panel mounting screws.
Installation Figure 2–9: Dimensions used for rack mounting the 1780R-Series Video Measurement Set Figure 2–10: Dimensions of the adjustable rear rackmounting bracket 1780R-Series Service Manual 2–15
Installation To install the instrument in the rack: First remove the four securing screws and take the instrument out of the rack-mounting cabinet. (All 1780R-Series instruments are shipped in the rack-mounting cabinet to provide extra shipping protection.) Once the instrument is out of the cabinet, mount the front of the cabinet in the rack, using four 10–32 TORXR screws. Cabinet front slots are spaced, and wide enough, to accommodate standard racks.
Installation Portable Case Installation The 1780R-Series can be mounted in a portable case. This case is an optional accessory, and is nomenclated 1780F02. The portable case consists of a metal cabinet with feet, front elevating bail, carrying handle (all installed), and front and back protective covers. See Figure 2–12. Instrument mounting in the portable case is identical to that of the rack-mount cabinet. See Figure 2–8 for location of the mounting screws.
Installation In the procedures that follow the 1780R-Series front-panel control names are in ALL CAPITALS and menu items are enclosed in <>. Calibration Menu Information The Calibration menu is available for both vector and waveform, and uses both CRTs. Pushing the front-panel CALIBRATE button provides access to the menu. Several calibration features can be selected using the touch screen. Refer to the following Waveform and Vector calibration procedures.
Installation 2. Push the front-panel CONFIGURE button and touch until 1000 (1.0 Volt) is outlined. 3. Push the front-panel CALIBRATE button. Push the button below the Waveform CRT. 4. will be circled on the Vectorscope CRT. Use the large knob to adjust intensity. (The front-panel INTENSITY control adjusts signal intensity only. Readout intensity must be adjusted through the Calibration menu.) NOTE. Step 5 is to be performed for instruments SN B020244 and below only. 5.
Installation 10. Select as shown in Figure 2–13. The large knob will now adjust signal amplitude with respect to the graticule. Adjust for a 1 Volt display on the Waveform CRT. Leave the CALIBRATE button set to On. Figure 2–13: Waveform Calibration menu display 11. Select an input channel that has no signal applied. Check that TWO LINE sweep is selected. a. Push the front-panel TIME button to turn on the timing cursors.
Installation 12. Apply a 1.0 volt signal to the EXT HORIZ input. Touch . The large knob will now adjust sweep length (time) with respect to the graticule. Do not change the MAG setting (automatically set to 100 mV/div). Adjust the large knob for a horizontal display of 10 divisions. 13. Press the CALIBRATE button to exit the menu.
Installation 7. Touch to obtain a test axis, then use the large knob to adjust trace rotation on the Vectorscope CRT. Align the horizontal lines of the electronic graticule parallel with the Vectorscope CRT graticule. 8. Touch until is outlined. While the cal oscillator is on, the V axis switcher is enabled and 75% bars are selected (with 7.5% setup for NTSC). a. For 1780R (NTSC) only: Touch on the Waveform CRT. See Figure 2–14.
Installation Figure 2–14: 1780R (NTSC) Vectorscope Calibration menu display with CAL OSC on Figure 2–15: 1781R (PAL) Vectorscope Calibration menu display 1780R-Series Service Manual 2–23
Installation Repackaging Identification Tag If the instrument is to be shipped to a Tektronix Service Center, attach a tag to the instrument showing: 1. Owner (with complete address) and the name of the person at your firm that can be contacted. 2. Instrument serial number and a description of the service required. Repackaging for Shipment Repackaging the instrument in the original manner provides adequate shipping protection (See Figure 2–16).
Installation Figure 2–16: 1780R-Series repackaging 1780R-Series Service Manual 2–25
Installation 2–26 1780R-Series Service Manual
Operating Information In order to effectively service the 1780R-Series it is essential to understand how the controls work. Controls and switches fall into one of four groups; Display (Scale, Focus, Intensity and Positioning), Special Purpose (Preset, Measure, Configure, and Calibrate), Precision Measurement (Cursors, Phase, Line Select, etc., which support the assignable measurement control), and the Functional Measurement controls and switches (Input and Reference switching, etc.
Operating Information 10 11 9 12 15 5 2 4 6 7 3 8 13 14 1 16 17 18 19 Figure 2–18: Front panel of the 1780R-Series Video Measurement Set Front-panel Controls With the exception of the POWER switch, all of the switches and controls on the 1780R-Series front panel fall into the general groupings of Special Purpose, Precision Measurement, Display, or Functional Measurement. Numerals by each control name are supplied to assist in locating the control in the two associated figures. 1. POWER.
Operating Information 7. VERT POS. Positions the selected display up and down. Positioning range depends on the display selected; range is much greater for the waveform monitor displays than it is for the vectorscope displays. 8. HORIZ POS. Positions the selected display left and right. Positioning range depends on the display selected; range is much greater for the waveform monitor displays than it is for the vectorscope displays. Special Purpose Switches 9. PRESET.
Operating Information 19. < >. A pair of momentary contact switches that provide stepped levels that duplicate the function of the Precision Measurement control.
Operating Information Functional Measurement Controls Functional Measurement Controls are shown in Figure 2–19. Note that the numerical entries are enclosed in rectangles instead of the circles that were used in Figure 2–18. 1 2 3 4 8 11 12 5 6 7 9 10 13 14 19 20 18 17 16 15 Figure 2–19: The right front panel for the Tektronix 1780R-Series, showing the Functional Measurement Controls Left Display 1. VECT / SCH.
Operating Information Right Display 3. PARADE / OVERLAY. Momentary contact switch that cycles through selections of sequential displays that can be up to 3 lines or 3 fields on a single display, depending on the selected waveform sweep. 4. WFM / WFM + CAL. Momentary contact switch that cycles through selections of standard waveform or waveform plus calibrator signal for display on the waveform monitor CRT. Small front-panel light-emitting diodes indicate the selected display. Input 5. CH A / PROBE.
Operating Information transitions) display. Small front-panel light-emitting diodes indicate the selected filter. WFM Horizontal 11. ONE / TWO / THREE. Momentary contact switch that toggles through two sweep positions (1-line or 1-field and 2-line or 2-field; 3-line or 3-field is activated by holding the button in). Small front-panel light-emitting diodes indicate the selected number of lines or fields per sweep. 12. LINE / FIELD. Momentary contact switch that toggles between line and field rate sweeps.
Operating Information 2–34 1780R-Series Service Manual
Theory of Operation Contents of this section are designed to work with the block and schematic diagrams in Section 9, at the back of this manual. Each schematic diagram description begins with a small block diagram of the circuits on that page and a short overview relating the illustration to the circuit theory that follows. Block Diagrams The 1780R-Series contains a large amount of circuitry; in order to simplify the block diagram, it has been split into 5 pages.
Theory of Operation Block Diagram 4 Microprocessor This diagram contains the interface to the front-panel switches, indicators, and touch panels along with the rear-panel serial and remote connectors. In addition, it contains circuitry that controls internal switching functions and generates readout for both CRTs.
Theory of Operation Table 3–1: Schematics and Circuit Board Assemblies 1780R-Series Service Manual Diagram Number Schematic Name Assembly Name Assembly Number 1 Input Amplifiers A and B1 Input A1 2 Input Amplifiers B2 and B3 Input A1 3 Probe Input & DC Restorer Vectorscope & Waveform A6 & A2 4 Input & Reference Selection Waveform A2 5 Diff Amp & Video Filters Waveform A2 6 Vertical Deflection Waveform A2 7 Vertical Control Logic, Calibrator, & Cursors Waveform A2 8 Ref Sy
Theory of Operation Table 3–1: Schematics and Circuit Board Assemblies (Cont.
Theory of Operation Diagrams 1 & 2 Input Amplifiers Overview Circuit Theory The Input board contains four amplifiers that give the input signal gain, DC restore it, and send it to the + and – Amplifiers. Since they are identical circuits, only the operation of Channel A will be described. Channel A Input. The input signal is connected to the loop-through BNC connectors on the rear of the instrument. Inductors L116 and L115 provide good return loss characteristics over the video bandwidth.
Theory of Operation inverting input, pin 2 of U418) form a low-pass filter, with a notch at the subcarrier frequency. U418 drives C543, which holds charge during the active portion of the video line. When Q408 is on, C512 is in parallel with C521, and the DC Restorer response is slowed so that 60 Hz (50 Hz for 1481) hum is not attenuated. The DC Restorer is turned off by the absence of the sample pulses at the sample input (pin 5) of U418.
Theory of Operation Diagram 3 Probe Input and DC Restorer Overview The 1780R-Series is equipped with a front-panel Probe Input, which allows it to be used to make some measurements not normally possible with a waveform monitor or vectorscope. The Probe Input is a high impedance input that can also be used as another video input, when terminated with an in-line termination.
Theory of Operation The voltage follower drives a current-mode feedback amplifier consisting of Q492, Q390, and Q294. The gain is set by the feedback network consisting of R393, R396, R394, R295, and Q295. When the instrument is configured for X1 probe gain, Q295 is off and R393 and R396 set the amplifier gain to 1.1. In the X10 gain setting, Q295 is saturated and the feedback signal from R393 is shunted to ground through R394 and R295.
Theory of Operation hum is not attenuated. The DC Restorer is turned off by the absence of the sample pulses at the sample input (pin 5) of U1217. Hold capacitors C1216 and C1313 discharge to 0 volts through R1314, and the emitter of Q1215 stays at 0 volts. Operational amplifier U1211 (along with C1212, C1211, R1112, and R1216) is an active low-pass filter that stabilizes the characteristics of the DC Restorer loop. Q1215 provides a low output impedance for the filter at higher frequencies.
Theory of Operation Diagram 4 Input & Reference Selection Overview The + and – Amplifiers select the appropriate input signal for display. The + Amplifier output goes to the + input of the Difference Amplifier, while the – Amplifier output goes to the – input. The four video signals from the Input Amplifiers are connected to 6-to-1 video switches, which consist of multiple sections of transistor arrays.
Theory of Operation Circuit Theory Video Input Selection. Each video switch is an operational amplifier connected for unity gain, and consists of six differential amplifier inputs. An input is selected by biasing the appropriate differential pair with current from current sources Q1427 and Q1438. This biasing current is steered to the appropriate differential pair by applying a TTL high level to the resistor network at the differential input current source transistor.
Theory of Operation Diagram 5 Difference Amplifier & Video Filters Overview The signal at the output of the Difference Amplifier is distributed to many internal circuits. Seventy-five-ohm video is provided to the Auxiliary Output and Picture Monitor BNC connectors. There is an additional current source to provide bright-up for the selected line(s) on the Picture Monitor Output. There are four filters that act on the applied video signal (luminance, low-pass, chrominance, and differentiated step).
Theory of Operation Only one signal is switched through the saturating transistor at a time, although Flat, Luminance, and Chroma may be time multiplexed. The luminance filter has a 1 MHz bandwidth and a transmission zero at the subcarrier frequency. It has been optimized for best transient response. This filter has performance identical to the luminance filter used in the Tektronix 1480 and 1485 Waveform Monitors. The chrominance filter is a bandpass filter centered on the chrominance subcarrier.
Theory of Operation Chrominance Filter. The chrominance filter is a Lerner-type filter, exhibiting arithmetic symmetry and linear phase across its bandwidth. U827 amplifies the filtered chrominance signal to drive both the Waveform Monitor and Vectorscope circuits. Differentiated Step Filter. U840A and B with associated circuitry form an active low-pass filter. U840C, D, and E form an operational amplifier. C838 and R837 are connected as a differentiator or highpass filter. Auxiliary Input.
Theory of Operation Diagram 6 Vertical Deflection Overview The current output of the filters passes through a common base amplifier which drives a Gilbert multiplier (Variable Gain Amplifier). Output current from the Variable Gain Amplifier drives inputs to two separate differential amplifiers (X1 and X5). The other side of the differential amplifiers is driven by the Vertical Position voltage. Vertical readout information from the Microprocessor is input through a third differential amplifier.
Theory of Operation gives them five times greater transconductance. Current from U415B is switched to the appropriate differential pair by U415A and U415D. The differential pair that is off has a high impedance so that it does not affect the other pair. The second input to the differential pairs is connected to the vertical position voltage. R526 sets the balance between the output currents to center the X5 gain at the 0 IRE (300 mV for PAL) graticule line. Readout.
Theory of Operation Diagram 7 Vertical Control Logic, Calibrator, & Cursors Overview Circuit Theory 1780R-Series Service Manual The Microprocessor controls the vertical functions through three 8-bit latches. These are all static logic levels. Dynamic switching, such as the Ch-A/Ch-B Parade display, is achieved by state machines in logic arrays, and is timed by sync from the Horizontal Timing circuit. Analog voltages, such as position and gain, come from the Sample-and-Hold circuits on Schematic 12.
Theory of Operation Table 3–2: Input Channel Selection Logic (U1415) Par Mode (U1415) Internal Reference Operating Modee per i M Input(s) p I1 I2 I3 I4 I5 I6 I7 I8 SINGLE INPUT A 0 0 0 0 0 0 0 0 CH A SINGLE INPUT B1 0 0 0 1 0 0 0 0 CH B1 SINGLE INPUT B2 0 0 1 0 0 0 0 0 CH B2 SINGLE INPUT B3 0 0 1 1 0 0 0 0 CH B3 SINGLE INPUT PROBE 0 1 1 1 0 0 0 0 PROBE DIFFERENTIAL A B1 0 0 0 0 1 0 0 0 CH A DIFFERENTIAL B1 B2 0 0 0 1 1 0
Theory of Operation DC Restorer and Reference Selection. Data for the reference and DC Restorer is latched in by U1506. This latch controls input coupling and DC Restorer operation along with the internal/external reference selection. Filter Selection. The encoded 4 bits of filter selection data is latched in by U905. U815 is a logic array, controlling filter selection and calibrator timing. U720 is a 3:8 decoder outputting the filter selection signals for Diagram 5.
Theory of Operation U1105 is a logic array that selects the timing rate (pin 16) for the logic on this schematic. HSYNC or VSYNC is selected depending on whether the horizontal sweep rate is at a line rate or field rate. Voltage Cursors. U1019B is the Voltage Cursor Amplifier. Upper and lower voltage levels are determined by the Microprocessor, and are stored by the Sample-and-Hold circuits on Diagram 12.
Theory of Operation Diagram 8 Reference Sync Generation Overview Both Internal and Reference sync inputs are filtered by active low-pass filters. The Internal Sync Separator is a descrete clamped operational amplifier circuit that is clamped just above sync tip level to clip off active video. The Reference Sync Separator is monolithic providing both composite sync and AGC video outputs. Its AGC output is used to trigger the slow sweep circuits.
Theory of Operation R1156 and R1253 setting the AC gain. CR1155, CR1254, U1159A, and C1254 form the feedback clamp. The clamp sets sync tip to +3 V at the operational amplifier output (U1159 pin 1). U1159B and R1260 provide a constant current discharge path for C1254 during sync time. The clamp voltage is varied by adjusting the current flow through CR1254. U1159C amplifies and inverts the separated sync producing a 5 volt, negative-going sync pulse at its collector (pin 14). Reference Sync Separator.
Theory of Operation pulse when the 50% sync point corresponds with a negative subcarrier zero crossing ±80°. This positive-going output pulse drives the SCH color framing logic on Diagram 14.
Theory of Operation Diagram 9 H & V Sync Generators Overview The Horizontal and Vertical (line and field) Sync Generators extract the synchronizing signals from the output of the Reference Sync Separator (Diagram 8) or the Remote Sync Input to supply the required sync signals for the rest of the instrument. In the absence of input video or remote sync, free-running H and V sync signals are output to control sweep, clamps, and CRT readouts.
Theory of Operation U185D or U185A being gated through. The output of U185C is Reference Sync and Direct Remote Sync. V Sync Detector. Q385 and Q391 form an integrating Sync Detector that has an output when the vertical broad pulse occurs. Q385 is saturated for all of the field, except during the vertical sync pulse when it is turned off. When Q385 turns off, C285 charges, causing the collector to ramp up in a nearly linear waveform.
Theory of Operation Ref H Sync Generator. The Reference Horizontal Sync Generator is made up of two one-shot multivibrators. U596B is triggered by the direct or AFC sync from the Direct or AFC switch. Its Q output is a 0.5 ms pulse whose trailing edge triggers the second one-shot. Using the trailing edge of the first one-shot output provides a 0.5 ms delay to the leading edge of Ref H Sync. The Ref H Sync has a period of 1.
Theory of Operation too long for PAL signals, a jumper (on Diagram 10) is provided to realign the Fld Retrace Gate with V sync. See Field Sweep Gate description, on Diagram 10, for details. Clamp Pulse Generator for Waveform Display. U858B is a retriggerable one-shot multivibrator that generates a 2 s clamp pulse at either sync tip or backporch as dictated by U958.
Theory of Operation Diagram 10 Ramp Generator Overview The Ramp Generators produce the line and field sweep ramps for the waveform displays. The slope of the ramp, for 1- 2- or 3-line or field sweep, is controlled by a Digital-to-Analog Converter (DAC). Initiation of retrace and sweep start is controlled, through sweep gates, by the +Ref H sync (line rate sweep) and V sync (field rate sweep).
Theory of Operation When the sweep ramp has reached approximately 3/4 of its final amplitude the End of Sweep Detector outputs a high on the pin 1 input of U775A (OR gate) to provide a high on one input of U780A (an AND gate). The next +Ref H sync will AND U780A causing Q589 to turn on and force the Line Ramp Generator to retrace and hold low for the remainder of the +Ref H sync pulse.
Theory of Operation In 3-field sweep modes the FLD Retrace Gate is always high. The Field Ramp Generator End of Sweep Detector outputs a high in the last third of the ramp. ANDing through U760B does not occur until significantly after the second V sync to ensure that the next V sync will again retrace and start the Field Ramp Generator. In 2-field sweep mode it is possible to trigger the field sweep on a selected monochrome field.
Theory of Operation Whenever either End of Sweep Detector goes high U790B outputs a corresponding high (Trig En) to synchronize cursor display, calibrator display, and differential gain and phase displays. Retrace Switch Blanking. Sweep blanking occurs whenever the output of U775D (an OR gate) goes high. In field rate sweep modes, blanking is directly related to the sweep retrace start and end. The blanking pulse is generated by U780C (FIELD high) and U790D output high (duration of ramp retrace).
Theory of Operation Diagram 11 Horizontal Magnifier & Output Amplifiers Overview The Magnifier Amplifier provides selection of fixed voltage gains for the Line and Field Ramp Generator sweep ramps. This provides the time per division variation on the horizontal axis of the CRT display. In addition, the Magnifier Amplifier provides variable amplification for the sweep ramps, external horizontal input (ICPM mode), and external RGB staircase.
Theory of Operation gain of the amplifier is increased. When a gain greater than X5 is selected, the lower gain transistors are also saturated, turning on up to all six attenuator transistors for X100 magnification. The capacitors C572 and C575 provide compensation for the amplifier at gains less than X50.
Theory of Operation Readout Switching. When /WFM READOUT EN is high, the H RO DATA WFM signal is disconnected from the Output Amplifier by turning on Q267 to short the readout signal to the –2.2 volt supply. When Q267 is on, CR251 is reverse biased and the horizontal readout data is disconnected from the Output Amplifier. When Q267 is on, Q354 is open and allows the output signal from the Magnifier Amplifier to flow through R354 and CR252.
Theory of Operation Diagram 12 Horizontal Latches & DAC Overview Eight-bit digital data from the Microprocessor, used to control horizontal as well as some vertical functions, is latched onto the circuit board. A Latch Select Decoder, using three address bits, controls the Data Latch operation. Data bits from the latches are input to a 16-bit Digital-to-Analog-Converter (DAC) that converts the data bits to the analog voltage levels used for gain setting and positioning. Circuit Theory Latches.
Theory of Operation Sample-and-Holds. The sample-and-holds sample the output of the DAC when its analog switch is closed. U708 is an analog multiplexer employed as a singlepole, 8-throw switch. U245 is a dual-in-line switch package using three sections. The Sampling Amplifiers are in U251, U605, and U810, which are Quad-Differential Amplifiers.
Theory of Operation Diagram 13 Slow Sweep & Ext Horiz Input Overview The External Horizontal Input Amplifier is a non-inverting amplifier that inputs a ramp voltage of ≈5 volts to produce a 10-division sweep ramp. The Slow Sweep Ramp Generator produces a ramp that is triggered by an APL change through 50%, or free-runs after about 10 seconds when no trigger has occurred. AGC video is sent from the Reference Sync Separator to detect APL changes.
Theory of Operation 50% to above, the output of the amplifier changes from being limited at the positive supply to being limited at the negative supply. This negative transition is coupled through C557, turning on Q658 to begin the ramp. When Slow Sweep Trigger is set to – a decreasing APL change, through 50%, passes through a 0 volt threshold set on U458A by the SLOW SWP +/– control line being low on the + input of U458A.
Theory of Operation Diagrams 14 & 15 SCH Phase Timing & Sync Locked Oscillator Overview The 1780R-Series displays the horizontal sync to subcarrier phase relationship as a polar plot on its Vectorscope CRT. It generates a subcarrier rate signal, phase locked to the 50% point of sync that is demodulated against burst-locked subcarrier to produce a dot on the vectorscope. By comparing this sync dot to the burst vector, the SCH phase of the signal can determined.
Theory of Operation Logic and Timing to control the oscillator is generated, based upon the burstsync relationship of reference video. Also, field identification information is provided to the MPU for line select. Finally, the burst-sync relationship of the reference video is determined. The Burst Phase Detector is part of the Reference Sync circuitry on Diagram 8. Circuit Theory (Diagram 15) Sync 50% Detector. Q1451, Q1548, and Q1450 form an inverting amplifier with a gain of 8.
Theory of Operation The oscillator output is divided by 4 with a Johnson counter internal to U990. The counter has four outputs that are 90_ apart. These four signals drive a 4:1 multiplexer, also internal to U990, which is controlled by a flip-flop, U985 on Diagram 14, through pins 8 and 9. By controlling the multiplexer the FSC signal output on pin 16 of U990 can be phase shifted in 90_ increments. In NTSC, there are 227.5 cycles of FSC per horizontal line.
Theory of Operation U1497B is a D-type flip-flop that generates a negative pulse (Q) to turn on U1397 immediately after the Sample Gate again goes low. This flip-flop-generated TSC pulse is approximately 1 subcarrier cycle in duration. Lock detection is done by U1497A, a flip-flop. When the loop is locked, the FSC feedback signal (pin 2) will always be high when the Sample Gate (pin 3) transitions positive. Thus the output from U1497A (pin 5) will also be high.
Theory of Operation flip-flops drive U980 where a color field 1 pulse is output on pin 20 during line 11 (NTSC) or line 7 (PAL). The 1781 also outputs a Bruch frame pulse, on pin 21, during line 7 of fields 1 and 5. Both the field 1 and Bruch pulses are required by the MPU for line selection. An internally-referenced NTSC SCH display can be set to display one (single) or two (double mode) by setting J1085.
Theory of Operation Diagrams 16 & 17 Master MPU, ROM & NVRAM Overview Circuit Theory 3–44 The Master MPU kernel consists of the NS32CG16 processor, running at 10 MHz, and its associated clock, memory, and buffering circuitry. Also included here are the Internal Chip Select and Wait State Generator PALs. The Master MPU is supported with 128K of Read-Only Memory (ROM), a Non-Volatile Random Access Memory (NVRAM), and 128K of Dynamic Random Access Memory (DRAM), shown on Diagram 17. Microprocessor.
Theory of Operation The Master MPU normally does not use the Non-Maskable Interrupt (NMI) signal and it is held high by a pull-up voltage from one segment of R360. It can, however, be asserted for troubleshooting by placing a jumper across J342. Latches. The Master MPU uses a multiplexed data bus and the lower 16 address bits are latched by external latches U135 and U137. The latches are actuated by an inverted /ADS signal which latches data during processor cycle T1.
Theory of Operation Diagram 17 Dynamic RAM Overview The Dynamic Random Access Memory (DRAM) is a 16-bit wide memory used by the readout engine for its instructions. The system consists of three major components; the memory array, an address multiplexer, and a control PAL. The memory array consists of four 4-bit architecture DRAM chips residing on a 16-bit bus. The Master MPU accesses each address from IA1 through IA8 (256 values) once every 4 ms; the least significant bit (IA0) is not used as an address.
Theory of Operation The Master MPU memory access sequence starts when /ADS goes low, forcing Master MPUGO to be latched high by U595A&B and start the PAL sequence. /RASO, which is in-line terminated by R361 and becomes /RAS, goes low to enable the memory chip RAS input. The row addresses must be stable at this time. 50 ns after /RASO goes low, /COL goes low and switches the address multiplexers, U353 and U357, from the row to the column addresses.
Theory of Operation high to remove the readout engine’s address from the bus. The Control PAL then waits until the Master MPU raises /HOLDA, signifying its return to bus control. At this point the PAL enters the normal idle state to wait for the first Master MPU cycle. DRAM Memory. The DRAM consists of four identical 64K × 4 addressable memory chips. Each chip outputs 4 bits of the 16-bit memory word to the data bus AD. Each chip has row and column enable inputs along with a write enable.
Theory of Operation Diagram 18 Line Rate Controller Overview The Line Rate Controller provides real time control of the readout and line select functions for both the waveform monitor and vectorscope CRTs. It issues instructions to start, stop, hold, or skip readout. It determines if only readout is to be displayed, readout is to be sent in block or burst form with a return to video display, or if a sequence of two lines of video followed by two lines of readout will be executed.
Theory of Operation currently being used and a TaskData stack that is being built for a new line number selection, or a different line rate, etc. The two bytes that are actually TaskData consist of data bits that go to control lines (WLS LINE, WRO START, etc.) for the Readout Engine and Z-Axis at specific video line numbers. The Line Rate Controller keeps track of the actual video line number through the synchronization signals (V SYNC, –REF H SYNC, etc.). Circuit Theory Processor (U167, U367).
Theory of Operation are ANDed together in U167 to produce a frame sync pulse. The frame sync pulse interrupts the Line Rate Controller and causes the line counter to be reset to zero, and resets the Static RAM stack pointer. In the 1781R 2 of 8 mode the BRUCH frame pulse provides the interrupt through U167. This is a negative edge signal that occurs on line 7 of field 1 and field 5.
Theory of Operation line allows execution of the instruction set to continue. By inserting one WFS per instruction set, the VRO START signal will control the refresh rate of the readout. V UNBLANK (P4.4) controls the blanking of the Z-Axis for the vectorscope CRT. This signal control line is one of four signals applied to the 4-input NAND gate, U289A, on the Z-Axis Diagram 35. The NAND gate controls whether the vectorscope trace is displayed or blanked.
Theory of Operation The output of the WRO START LINE is wire ANDed with the VRO START to provide an RO START control line at pin 12 of U165. WRO INHB (P5.4) is wire ANDed with the control line from pin 7 of U167 and fed to the one-shot, U453A. the LINE SEL RETRACE at the output of U453A rephases the Sweep Generator to the video in 2-line and 3-line sweep modes. U453A sets this control line high a number of lines prior to the selected line for line displays. WRO ONLY (P5.
Theory of Operation Diagram 19 UART & A/D Overview The Universal Asynchronous Receiver/Transmitter (UART) has both RS-232 and RS-422 buffers for communication between the Master MPU (Diagram 16) and external peripherals. By using two buffers and internal terminations it is possible to use a single rear-panel 9-pin, D-type connector for both interface standards. The A/D Converter changes the 16 analog potentiometer signals into 8-bit digital bytes for use by the Master MPU.
Theory of Operation J595. Pins 7 and 8 of U495 go to connector J495. This connector is used by the factory to connect to peripheral equipment when developing software. A to D Converter. The A/D Converter, U217, combines a 16-bit analog multiplexer with an 8-bit A/D Converter. The multiplexer is set by accessing the ADMUX address region to activate the /ADMUX strobe. The least significant 4 bits of the address (IA0..IA3) are used to set the multiplexer to 1 of 16 values.
Theory of Operation provide a 2-field sweep. Remote sync is AC-coupled with an input impedance of approximately 1 MW. Q392 is a switching transistor that is turned off when Remote Sync Enable is present and saturates when there is no enable present. Remote sync polarity is selected by changing a plug-jumper on Diagram 9. RGB Amplifier. The RGB staircase signal from the rear-panel REMOTE connector drives an operational amplifier composed of Q197 and Q195.
Theory of Operation Diagram 20 Readout Engine & Read Output Overview Circuit Theory 1780R-Series Service Manual The asynchronous Readout Engine outputs the readout characters that are displayed on the vectorscope and waveform monitor CRTs. Digital data from the Dynamic RAM is converted to an analog output for display. The D/A Converters are loaded from the Internal Data (ID) Bus and output the analog signal to sample-and-hold circuits for display on the CRTs.
Theory of Operation State Machine Latch. The 4-bit output of the Data Latch is input to the State Machine Latch (U171, U376, and U385). In addition to the outputs from the Data Latch, control signals from the Line Rate Controller are latched by the State Machine Latch at a 500 kHz rate to control the Readout State Machine. Readout Multiplexer. U170 is an up/down counter that is load enabled by its own BO (Borrow Out) output forming a divide-by-7 counter that is clocked by the -H Ref sync pulse.
Theory of Operation edge of the /Sample RO from the Readout State Machine. U560B drives the Vertical Output Amplifiers of the CRTs; R555 (V Shape) is a gain control. U560C and D, which are also driven by the sample-and-hold output, provide an increase in drive to the Z-Axis Amplifier when readout segments or cursors are being displayed. Horizontal Sample-and-Hold operates in the same manner, except that the gain is 2 (instead of unity) in the comparator circuit.
Theory of Operation Diagram 21 Interconnect Overview All inputs to and outputs from the MPU circuit board are through the Interconnect. There are two connectors on the MPU Interconnect, one that ties into the 1780R-Series main Interconnect circuit board, and one that serves as the I/O for the MPU Annex board. A transceiver is the bridge between the Internal Data (ID) Bus and External Data (ED) Bus used by circuits not on the MPU circuit board (including the MPU Annex board).
Theory of Operation Enable (/ANDBE) controls communication with the circuitry on the Annex circuit board. Address Latch. U101 is a tri-state device conducting A-to-B only because G is tied low and the DIR tied high. It outputs three External Addresses (EA0-EA1-EA2) used as controls on the Waveform, Oscillator, Z-Axis, and Filter circuit boards. In addition, it outputs the External Read (/ERD), Write (/EWR), and Restore (/ERST0) used to time the Keyboard/Display circuits on the Annex circuit board.
Theory of Operation Diagrams 22, 23, & 24 MPU Annex, Front Switch Panel, & Touch Panel Overview Circuits on the Annex circuit board (Diagram 22) tie the 1780R-Series data bus to the front-panel switches, touch screens, indicators, and the Optical Encoder. Data transactions to and from the Master MPU are through a bi-directional transceiver. Two-way communication with the front-panel switches and indicators along with the CRT touch panels is through the Keyboard Display driver and non-latched interface.
Theory of Operation MPU enables U437, Read (RD) enables the buffers to read from the bus, and Write (WR) enables the buffers to write to the bus. RL0-RL7 are data inputs from the Front Switch Panel (Diagram 23) and Touch Panel (Diagram 24). SL0-SL3, OA0-OA3, and OB0-OB3 are outputs to the Front Switch Panel (Diagram 23) and Touch Panel (Diagram 24). Drivers.
Theory of Operation Rotary Encoder / Decoder. U441 is the decoder for the optical rotary encoder on the touch panel. U441 compares the current inputs to CHA and CHB to the previous reading and, if there is a difference, starts an up/down binary counter. The counter output is transferred to an output register for the Master MPU to read. The SEL input is held high to set the register to 8 bits. Beeper. U530 is a timer connected in a multivibrator configuration.
Theory of Operation Diagram 25 Vectorscope Input & Gain Overview The Data Latches decode the Vectorscope operating instructions from the Master MPU. Two of the circuits controlled by these instructions, Chroma Amp and Test Circle Oscillator, appear on this schematic. The Test Circle Oscillator is a crystal-controlled oscillator running at FSC.
Theory of Operation Chroma Amp. U486D is one section of a dual-in-line package (DIP) of switches that closes on a low control input (pin 16) and opens on a high. When the switch is open, Q573 turns on and parallels R566 with a network made up of C570, R571, and R568 to lower the Gain Cell gain by 25%. Lowering the gain scales the signal to the Vectorscope graticule, which allows the targets normally associated with 75% amplitude color bars to be used for 100% amplitude color bars.
Theory of Operation Diagram 26 Diff Phase/Gain Overview Circuit Theory The Differential Gain and Phase Demodulators change a subcarrier rate signal into DC currents proportional to chroma amplitude (gain) and phase. The resultant current is limited (to prevent driving down-stream amplifiers into limit), filtered (to get rid of high frequencies), and amplified to produce the DEMOD out signal for the dP/dG Alternate Mode switch (Diagram 34) and the Recursive Filter (Diagram 35).
Theory of Operation The DP Zero adjustment, C172, provides a small amount of delay to the switching signal in order to have the demodulator timed to the R-Y Demodulator (Diagram 28). Differential Gain Demodulator. U261 is a balanced demodulator used as an envelope detector that multiplies the input chroma by itself to come up with a DC current proportional to the input chroma amplitude. The signal and switching inputs are driven by chroma, whose amplitude is set by the Gain Cell on Diagram 25.
Theory of Operation for a DC level of 1 volt, with no chroma, to accommodate the Recursive Filter (Diagram 35). Demodulator Switching. U386A and B control the selection of the demodulators. For either dG or dP the Preset and Clear for U386B controls the selection of the demodulators. When dP is selected it is high and dG is low, which presets U386B and sets /Q low and turns on the Differential Phase Demodulator (U267).
Theory of Operation Diagram 27 Vector Timing & Blanking Overview The Vectorscope display selection, chroma clamp, center dot clamp, and SCH blanking signals for the Vectorscope are generated by the Vector Timing circuits. In addition, the switching of the SCH and Vectorscope chrominance signals occurs on this schematic. Input signals to the Deflection Amplifiers drive the Center Dot Comparator.
Theory of Operation The input H sync pulse width, which is regenerated, is approximately a half line in duration. In order to provide a uniform duration, usable H sync is shaped by a monostable pulse shaper. Its output is supplied to the Differential Gain and Phase circuits as well as to the Blanking Logic. The Center Dot Blanking Logic, which consists of NOR and NAND gates, outputs the Vectorscope blanking pulse and the horizontal sync used by the Pix Mon H-Sweep Generator.
Theory of Operation deflected away from the center, one or two of the comparators will drive a summing point, at the emitter of Q323 (a common base amplifier) and turn it on. When Q323 turns on, its collector goes low to disable U327C. Whenever there is no deflection and the display is centered, Q323 is turned off and a high is applied to one input of U327C. If no center dot blanking is desired, P321 (Center Dot Blanking Disable) can be moved to pins 2 and 3 of J321. Horizontal Sync Pulse Shaper.
Theory of Operation Diagram 28 Demodulators Overview Chrominance from the Gain Cell is clamped to 0 volts. The Vertical and Horizontal Center Dot Clamps provide a fixed bias level to the demodulators when the Chroma Clamp forces the signal input to 0 volts. The Vertical Demodulator (R-Y or U) uses the QFSC signal from the Subcarrier Regenerator as the carrier or reference for demodulation. The Horizontal Demodulator (B-Y or V) uses the IFSC from the Subcarrier Regenerator as its reference.
Theory of Operation al transconductance amplifiers used in sample-and-hold circuits. The demodulated chrominance that is fed back drives the negative input; the positive input is driven by a Position control DC reference voltage (from the Master MPU). At the middle of horizontal sync a PAL (located on Diagram 27) generates the Center Dot Clamp pulse, which is the bias input to the operational amplifiers (U138 and U337).
Theory of Operation Diagram 29 XY Inputs & PIX Monitor Overview Picture monitor sweeps and XY input signals drive the Deflection Amplifiers through switching circuits on the Deflection Amplifier schematic diagram. The Sweep Generators have sufficient gain range to accommodate either 525/60 or 625/50 scanning rates. The XY Amplifiers are designed for 0 to +12 dBm audio signals, but can be internal jumper switched to provide approximately X10 Amplifiers for non-audio applications.
Theory of Operation XY Input Amplifiers. U211 is a quad, J-FET input operational amplifier. U211A and C are balanced Differential Input Amplifiers intended for audio use. In a 600 W system, R113 and R308 can be adjusted to normalize signals from 0 dBm to +12 dBm (2 -9 volts p-to-p). The input impedance is greater than 20 kW to ground. P108 and P205 (on J108 & J205) can be installed to connect the inverting inputs of U211A and U211C for high gain (X10) inputs.
Theory of Operation Diagram 30 Vector Deflection Amps Overview Demodulated R-Y (V) and B-Y (U) is amplified and input to a switching circuit controlled by the Master MPU acting on front-panel switch selections. When Vector or SCH display is selected, the Demodulated R-Y (V) is input to the Vertical Deflection Amplifier, and the Demodulated B-Y (U) is input to the Horizontal Deflection Amplifier.
Theory of Operation Horizontal and vertical readout (from the MPU), X and Y output, and picture monitor sweeps are input directly to the switching circuit for display on the Vectorscope CRT. Input signal switching to the Deflection Amplifiers is Master MPU controlled in response to front-panel switching and touch screen menu selections. Circuit Theory R-Y and B-Y Amplifiers.
Theory of Operation Deflection Amplifiers. The amplifiers are nearly identical. The Vertical Amplifier, which has VHF Compensation (C614), consists of Q611 and Q617 (a differential pair) and Q710 and Q719 (grounded base amplifiers) that speed up the amplifier by minimizing the Miller capacitance of Q611 and Q617. Q515 and Q516 are the current source for the differential pair.
Theory of Operation Diagram 31 Subcarrier Regenerator Overview The Reference Video signal from the Waveform Monitor Reference switch (Diagram 4) is buffered and bandpass filtered before being mixed with the Voltage-Controlled Crystal Oscillator (VCXO) output to produce a control signal for the VCXO.
Theory of Operation provide a TTL pulse at FSC to the Digital Phase Shifter and the comparison input of the Mixer stage. The External CW loop-through input is buffered, to common mode out ground currents, and bandpass filtered. The filtered output is converted to TTL pulses, for the Digital Phase Shifter, by a strobe-controlled complementary comparator. Circuit Theory Buffer and Bandpass Filter, and Mixer and Low-Pass Filter. Q297 and Q298 form a non-inverting buffer amplifier.
Theory of Operation present on the sync backporch. This effectively locks out black and white signals or the vertical interval, where there is backporch but no burst. U383B is one half of a dual comparator that samples the output of the Mixer stage low-pass filter. Its output is low for phase lock and pulses high for an unlocked condition. U475 is a triple, three-input NAND gate used as a pulse gating circuit. U475A generates the lock/unlock levels, that after peak detection control the Pulse Generator.
Theory of Operation C394 is lowered ≈1/3 for PAL instruments. U397 is a strobe-controlled complementary output comparator. U397 provides TTL outputs, at External CW frequency, to the Input Switch, U469, from the bandpass filtered EXT CW signal. The strobe signal is disabled in EXT CW. It is also used to turn off the VCXO in NTSC instruments; U169 is disabled in PAL instruments. Input Switch. U469 is a quad 2-input multiplexer used to select the FSC reference for the input phase-lock loop.
Theory of Operation Diagram 32 Digital Phase Shifter Overview The Digital Phase Shifter uses the input subcarrier frequency to generate an intermediate and somewhat lower subcarrier frequency. The intermediate subcarrier, which is divided into 7200 parts, is used to load a Microprocessorgenerated count into a programmable counter.
Theory of Operation In addition, the divided by 7200 FSC’ produces the counter load pulse for a Programmable Divide by 7200 Counter that outputs the reference phase to the Phase Detector in the output phase-lock loop. The output phase-lock loop mixes the FSC’ signal with the output of a second VCXO to produce a difference signal that is low-pass filtered and converted to TTL levels by a balanced comparator. The TTL output of the balanced comparator is one input to the Phase Detector.
Theory of Operation U338. RCO from U342 is the counter load for the programmable counter (÷M and ÷N). The input register for the programmable counter (U235 and U238) is loaded with a count from the Microprocessor Data Bus. This count is in the form of two 8-bit words. The word consisting of the 8 least significant bits (LSBs) is loaded into the input register of U235 followed by the 8 most significant bits (MSBs) word being loaded into the register for U238.
Theory of Operation Diagram 33 Horizontal AFC & Post Regulators Overview REF SYNC, originating from the H Sync Generator on Diagram <9>, is compared to the H rate sync divided down from the VCO by a Phase Detector. If they are not phase locked, the Error Amplifier output will be high and cause the Acquisition Sweep to run and sweep the VCO frequency control circuits. VCO output, which is at 8 MHz, is divided by 2 and again by 256 to return to H rate.
Theory of Operation up, the output of the Phase Detector falls below the trigger threshold of the unijunction-wired Acquisition Sweep (Q411 and Q412), to turn off the ramp. If the loop unlocks, the output of the Phase Detector (through the Error Amplifier) goes above the Acquisition Sweep threshold and the ramp is again generated, line by line, until lock re-occurs. VCO and Frequency Divider. The active components of the VCO are high-speed buffer inverters. Its output is approximately 8 MHz (512 × H rate).
Theory of Operation Diagram 34 Diff Gain/Phase Alt Mode Switch Overview The 1780R-Series offers a choice of either single display mode or a double display mode that can be nulled. The Alternate, or double mode, is switched about itself to display a mirror image. Sources of chroma for the mode switch are either directly from the Demodulators or a Recursive Filtered Demodulator output when noise needs to be reduced.
Theory of Operation Diff Gain/Phase Alternate Mode Switch. U425 implements a Switchable Polarity Amplifier, which outputs a differential current. Pin 4 is the signal input; transconductance gain is set by R422. The pin 6 output drives the + input of a Differential Operational Amplifier and pin 12 drives the – input. Levels at pin 8 and pin 10 dictate the polarity of the output from the Differential Amplifier. When pin 10 is high, there is no inversion between the pin 4 input and the Alt Demod signal.
Theory of Operation Diagram 35 Digital Recursive Filter Overview The Digital Recursive Filter reduces the noise content of differential phase and differential gain signals without impacting the spectral response below 500 kHz by reinforcing the harmonic frequencies that are multiples of line rate. The video line is broken into 256 points, and each point is associated with a memory location. A point is sampled and the difference taken between it and a previous result stored in memory.
Theory of Operation The D/A Converter latches data off the M Data Bus at the same time that the Adder data is loaded into the Filter Latch. The analog signal is output to a low-pass output filter to remove sampling artifacts above approximately 750 kHz. The Address Counter output A6 is the clock for the Memory Write Control. The CPU Access provides addressing for the upper pages of Memory.
Theory of Operation Storage. The data stored in Static Random Access Memory (U251 and U260) is from the conversion of the previously-sampled video line and is at the same point that the A/D Converter is outputting from the current line. During the read operation, the 12-bit Memory data is on the M Data Bus and is being input to the Adder (U440, U441, and U450). The lower 8 bits, on the M Data Bus, are inverted and input to the Subtracter (U461A, B, C, D and U470B, C, E, F).
Theory of Operation U400B is clocked by U261 when either /RD or /WR goes low while /Fltr Brd is low. An Exclusive OR gate internal to U261 outputs the INC pulse and increments the Address Counter. Incrementing the Address Counter toggles the A0 (U271-14) output, which is the other input to the U261 Exclusive OR gate, that resets the INC pulse after one address count. The /BYPASS clears U400B and U271 to reset the initial starting conditions. CPU Bus Interface.
Theory of Operation Diagram 36 Z-Axis Overview The Waveform and Vectorscope Z-Axis circuits act on blanking/unblanking signals from several sources to control the intensity of the CRT displays. Intensity control signals for both active display and readout are independently input to the Z-Axis circuits. The Waveform Z-Axis Amplifier is shown on this diagram, while the Vectorscope Z-Axis Amplifier is shown on the Vector High Volts diagram.
Theory of Operation from the vector intensity current source, U383C. Vector intensity is blanked if any one of the inputs to U289A is low. U486D steers current from the readout intensity current source, U486C. The display is blanked when no current is diverted into the output, which drives the Vectorscope Z-Axis Amplifier. Q380 is saturated to shunt the video signal to ground, unless a video signal is summed into the vector brightness circuit in the picture monitor mode of operation. Waveform Z-Axis Amp.
Theory of Operation Diagrams 37 & 38 Timing Cursors & Counters Overview 1780R-Series Service Manual The timing cursors for the 1780R-Series are narrow bright-up pulses applied to the CRT cathode. They can be moved independently in 5-nanosecond intervals. The Microprocessor keeps track of the time difference between the two timing cursors and displays the difference on the screen.
Theory of Operation will not start quickly at sync pulse time to be synchronous with the sweep. An LC Oscillator is used and calibrated to a crystal frequency reference during the vertical interval. At Reference calibration time the Freq Cal Timer circuit generates a Frequency Cal pulse that connects the Error Amplifier (U302A) output to the LC Oscillator frequency determining Varactor diode.
Theory of Operation Sample-and-Hold. During the time that the LC Oscillator is being checked against the 10 MHz Reference, U406A is closed and U406B is open; during the time that timing cursor information is being output, the switches are in the opposite configuration. With C403 paralleling C404, and the loop filter disconnected, C403 (after a few seconds) reaches the same voltage that C404 has in the oscillator calibration mode.
Theory of Operation The output from U429B drives U223B, which enables the Digital Delay Counters. U429B and U223B are both cleared with the /RAMP START signal, which becomes true at the end of the digital count from the delay counters. The remaining outputs from U426 are described as follows: LINE SEL PHASE: Presets flip-flip U429A during the selected line in line select mode so that one of the timing dots is present each time a line is displayed.
Theory of Operation information. This delay information is loaded into the three counters, U333, U336, and U339. At any given time, only one cursor delay can be active; Cursor 1 and Cursor 2 time share at a 30 Hz rate. Cursor 1 and Cursor 2 delays are selected by a clock steering decoder, U329, which latches data in from the Microprocessor Data Bus. U239 and U233 latch the data for Timing Cursor 2, while U236 and U243 latch the data for Timing Cursor 1.
Theory of Operation Diagram 39 CRT Display DAC Overview The CRT Display DAC decodes digital information from the Microprocessor Data Bus to drive 16 analog control voltage outputs. This digital information is the current setting of front-panel controls, such as Focus and Intensity levels, and some menu driven (Measurements control set) functions, such as Read Out Intensity and Trace Rotation levels. The Digital-to-Analog Converter (DAC) provides a single analog output for each digital word it receives.
Theory of Operation Analog Multiplexers. U346 and U348 are Analog Multiplexers. Each has one input and eight outputs; the input is the analog signal level from the DAC. The outputs are normally high impedance disconnects, except when one is selected by the digital word at inputs A, B, and C. U248 is a latch that takes a “snapshot in time” of the information on the data bus, and uses it as steering information to the Analog Multiplexers.
Theory of Operation Diagrams 40 & 45 Scale Illum & Trace Rotation – Graticule Lights Overview A Triangle Generator is employed to provide a triangular waveform to drive one input of the Pulse Width Modulators. Pulse Width Modulators are voltage comparators that compare the triangle-shaped waveform to DC voltages and produce a pulse width modulated square wave. The pulse width is changed by varying the DC voltage.
Theory of Operation Circuit Theory Rotation Drivers. The Rotation Drivers are simple push-pull, discrete transistor, emitter followers. Each driver consists of a pnp and npn transistor pair (Q377 & Q378, Q374 & Q375) between –15 volts and +15 volts. Their outputs drive the Trace Rotation coils around the Vectorscope and Waveform Monitor CRTs. Data Latch. 226 latches data from the Microprocessor Data Bus. Data values are transferred to the Q outputs on the rising edge of the Grat Clock signal (pin 11).
Theory of Operation S130 is a push-button switch with an LED that is directly beneath the Waveform CRT. It assigns Focus, Intensity, Scale Illum, and Position controls to the Waveform Monitor.
Theory of Operation Diagram 41 Vector High Volts Overview The Waveform Monitor high voltage supply generates all of the potentials required to power the CRT, except for the deflection voltages. The high voltage is derived from an Armstrong Oscillator-generated 33-kHz signal. The Error Amplifier, which controls oscillator base current, samples the voltage on the 100-volt supply, which is also generated by the High Voltage Oscillator.
Theory of Operation C130 provides a low impedance current path for the base drive winding of T240. R222 limits Q221 base current. Power Supplies. CR151 is a potted assembly of diodes and capacitors which provides a DC output equal to four times the peak input voltage. The output provides +11K volts DC post acceleration to the CRT anode. CR150 rectifies the minus peaks from the transformer secondary to provide the –2.75K volts CRT cathode potential.
Theory of Operation Focus Amp. The Focus Amp consists of Q380 and Q381 with R379 as the input resistor and R382 as the feedback resistor. Coarse focus is adjusted with R182, which is located at the Focus divider resistor string. The amplifier output varies between 0 and –250 volts. Line Select Focus. When the instrument is in line select, Q480 is turned on during the selected line in a periodic manner.
Theory of Operation Diagram 42 Waveform High Volts Overview The Waveform Monitor high voltage supply generates all of the potentials required to power the CRT, except for the deflection voltages (however, +160 volts for the Horizontal Deflection Amplifier is generated by these circuits). The high voltage is derived from an Armstrong Oscillator-generated 25-kHz signal. The Error Amplifier, which controls oscillator base current, samples the cathode supply DC voltage.
Theory of Operation Circuit Theory Osc. Q300 is the active element of an Armstrong Oscillator, with C410 and the primary of T210 resonating at 25 kHz. L200 and C100 filter the 25-kHz signal out of the +60 volt supply. C500 provides a low impedance current path for the base drive winding of T250. C300 prevents parasitic oscillations and R300 limits Q300 base current. Power Supplies. U220 is a potted assembly of diodes and capacitors which provides a DC output equal to four times the peak input voltage.
Theory of Operation Grid Drive Rectifier. Z-axis high frequency information is fed to the CRT control grid through C240. Low frequency information is through C241. The Grid Drive Rectifier, consisting of CR140 and CR141, is a voltage doubler that converts peak-to-peak voltage from the PP Clamp to DC.
Theory of Operation Diagram 43 Low Voltage Power Supply Overview The low voltage power supply is a line operated switcher, of the discontinuous flyback type, running at 40 kHz. The switching transistor saturates, placing the primary voltage across the primary winding. Due to the inductance of the primary winding, current rises in the switching transistor in a linear fashion. When this current reaches a preset amount (fixed by the control circuitry and the load power) the transistor turns off.
Theory of Operation The primary side of the circuit is not referenced to chassis ground and typically, the line common rides at – 150 volts, unless an isolation transformer is used. An isolation transformer between the instrument and the mains power will let the line side common float, which will allow the line side common to be connected to ground. WARNING. Troubleshooting or signal measurement should not be attempted without an isolation transformer.
Theory of Operation R140, and C240, which protects Q250 from over-voltage. C240 and CR141 arrest the voltage spike on the flyback pulse at a safe level (approximately 650 to 700 volts). L240 and R140 limit the rise time of the current pulse in C240, quieting the noise spike. C240 discharges each cycle, through CR140 and L140, when Q250 turns on. The rising edge snubber, consisting of C141, CR149, and R149, slows down the rising edge of the flyback pulse to diminish noise.
Theory of Operation Pin 1 of U460 is the Error Amplifier output. Pin 2 is the minus input to the Error Amplifier, the positive terminal is internally connected to +2.5 volts. Pin 3 is the current sense input, and pin 6 is the controller output, driving the base drive circuit. The Current Mode Controller has an internal oscillator and the frequency of operation is determined by a resistor/capacitor (RC) circuit (R560 and C461) connected to pin 4. Pin 8 is the +5 volt reference output.
Theory of Operation Output Filters. The filters are all the standard pi configuration except the –8 volt filter. There are three powdered iron beads (L420, L421, and L422) on the +5 volt secondary wires to help raise the other output voltages to the proper values. Error Amp. U131 is a shunt regulator supplying a +5 volt reference. The reference pin is the negative input to an internal amplifier and the cathode is the output. The reference input is set internally to operate 2.
Theory of Operation 3–118 1780R-Series Service Manual
Performance Verification This section consists of the Performance Check, used to determine compliance with the Performance Requirements listed in the Specifications section. Controls and connectors on the 1780R-Series front panel and rear panel are fully capitalized (e.g., RIGHT DISPLAY-WFM). Control and connector names on test equipment, as well as internal controls and adjustments for the instrument under test, are initial capitalized (e.g., Time/Div).
Performance Verification Table 4–1: Recommended Equipment (Cont.) Electrical Instrument Performance Requirements Example NOTE: The 1410 Series generators with standard SPG and TSG modules can be used, but this will not allow all checks and adjustments to be made. The 1410 and 1411 Option AB are mainframes with modified TSG7 and TSG11 Color Bar Generators that more accurately control output amplitudes of the standard 75% amplitude bars.
Performance Verification Table 4–1: Recommended Equipment (Cont.) Electrical Instrument Performance Requirements Example 9. Video Amplitude Calibration Fixture Signal; adjustable square wave 0.0 to 999.9 mV p-p with a resolution of 0.1 mV and an accuracy of 0.05%, frequency approximately 270 Hz. TEKTRONIX 067-0916-00 used in a TEKTRONIX TM500 Series Power Module. 10. Sine Wave Generator Signal: 10 Hz to 100 kHz sine waves; – and + balanced outputs.
Performance Verification Table 4–1: Recommended Equipment (Cont.) Electrical Instrument Performance Requirements Example 21. X Y Input Connector Fifteen-pin, subminiature D-type connector modified to input the audio signal for X Y checks and adjustments. See Figure 4–2. Tektronix Part No. 131-0459-00. 22. Remote Sync Input Connector 15-pin, sub-miniature, D-type connector modified to enable and to apply remote sync. See Figure 4–3. 23. 20 pF Input Normalizer Tektronix Part No. 067-0538-00. 24.
Performance Verification Figure 4–2: Rear view of the X Y plug connections. (Pins 2, 4, 6, 10, 12, and 14 can be used to make ground connections.
Performance Verification Figure 4–4: RGB Parade Display Test Connector 4–6 1780R-Series Service Manual
Performance Verification Short Form Procedure The Short Form Performance Check is provided for those familiar with the complete check procedure, and the Standard Performance Check Procedure is provided for those who need more detailed instructions. Both forms of the performance check procedure use the same step numbers so the short form can be used as an index to the standard form. 1. Check Power Supplies 2. Check Software Options (not required unless calibration data becomes lost or invalid) 3.
Performance Verification 23. Check Vertical Overscan 24. Check DC Restorer Shift Versus Burst 25. Check Filter DC Matching 26. Check Common Mode Rejection 27. Check Differentiated Steps 28. Check Non-Linear Waveform Distortion 29. Check Linear Waveform Distortion 30. Check Probe Input Gain 31. Check Calibrator Output Voltage for Probe 32. Check Probe Tilt and Non-Linear Distortion 33. Check Timing Cursor Accuracy 34. Check Sweep Rates and Timing Accuracy 35. Check Variable Sweep Range 36.
Performance Verification 51. Check Vector Display Clamp Stability and Position Range 52. Check Vector Display Variable Gain Range 53. Check Variable Gain Phase Shift 54. Check X and Y Input Phase Matching 55. Check X Y Frequency Response 56. Check SCH Phase Accuracy 57. Check WFM Trace Rotation and Orthogonality 58.
Performance Verification Performance Check Procedure This Performance Check Procedure is a continuous sequential procedure. If a step is performed out of sequence, pertinent control settings are given within the step. Remaining control settings can be determined by referring to Table 4–2; however, sometimes it may be necessary to go back one or more steps to check for possible changes. NOTE. Leave the metal cover installed on the instrument during the procedure.
Performance Verification NOTE. Leave the 1780R-Series internal jumpers in their factory-set positions unless directed otherwise. The factory-set positions are listed in Section 2, Installation, Electrical. Install the metal cover on the instrument and leave it installed when following this procedure to check performance requirements. Preliminary Setup H Verify that the 1780R-Series instrument is set to the desired nominal line voltage as indicated on the rear panel.
Performance Verification H Set the 1780R-Series front-panel controls and Configure menu selection to the settings given in Table 4–2. Adjust the controls for best viewing of the display. 1. Check Power Supply Operation Requirement:. Check AC input range, 90–132 V or 200–250 V, as determined by the line voltage indication. a. Vary the autotransformer from low-line to high-line voltage (as dictated by the rear-panel line voltage indication). b. Check for stable operation over the prescribed voltage range.
Performance Verification b. Set the VAC output amplitude to 999.9 mV. Check that the +Lum button is pressed in and the Lum/Sync button is out. Check that the correct television standard (NTSC, PAL, or PALM) is selected. NOTE. Leave the VAC +Lum and Lum/Sync buttons and television standard set as described in part b. whenever the VAC is used for this Performance Check Procedure. c. Check that the Television Test Signal Generator Black Burst signal is connected to the 1780R-Series EXT REF connector.
Performance Verification i. Check that the CAL readout on the Waveform CRT is 1000 mV ±2 mV. j. Set the WAVEFORM GAIN–VAR–X5 to Off. Set the INPUT to CH A. Leave the RIGHT DISPLAY set to WFM+CAL, the CONFIGURE button set to On, and the VAR/FIX selection set to VAR on the Waveform CRT menu when starting the next step. k. Disconnect the VAC signal from the instrument. 4. Check Volts Full Scale Accuracy Requirement: Volts Full Scale Accuracy: 1.0 V ±0.007 V. a.
Performance Verification b. Select WAVEFORM GAIN–VAR. Check that RIGHT DISPLAY–WFM and INPUT–CH A are selected. c. Use the VERT POS control to position the waveform backporch or blanking level to the graticule 0 IRE graticule line for NTSC (0.3 V for PAL) on the Waveform CRT. d. Turn the variable WAVEFORM GAIN control to obtain a minimum (“beep” sound) amplitude display. e. Check that the amplitude of the white bar is approximately 50 IRE for NTSC (350 mV for PAL). See Figure 4–7. f.
Performance Verification Figure 4–7: Identification of marks and divisions on the graticule baseline 4–16 1780R-Series Service Manual
Performance Verification 6. Check Voltage Cursor Accuracy Requirement: Accuracy: ±0.2%. Resolution: 1 mV. a. With no signal applied to CH A INPUT, set the front-panel controls and menu selection as follows: RIGHT DISPLAY–WFM+CAL, WFM HORIZONTAL–ONE–LINE, VOLTAGE CURSORS–On (ABSOLUTE, SEPARATE), CURSOR 1, CONFIGURE–On, PAGE 1, COUPLING– GND, ABS UNITS–IRE (for NTSC only). b. Use the VERT POS control to position the top trace of the Calibrator signal to the 0 IRE (0.3 V for PAL) graticule line. c.
Performance Verification d. Connect a coaxial cable from the 1780R-Series AUX OUT connector, through a precision (0.2%) 75 W feed-through terminator, to Ch 1 Input on the test oscilloscope. NOTE. The precision terminator is listed under Auxiliary Equipment. It is also supplied with the Return Loss Bridge. e. Check that the DC level, displayed on the test oscilloscope CRT, is between –0.5 V and +0.5 V. f. Move the coaxial cable from the AUX OUT connector to the PIX MON OUT connector. g.
Performance Verification l. Remove the four terminators used in part b. of this step and the coaxial cable from the AUX OUT connector to the test oscilloscope. 9. Check Noise Measurements Requirement: Accuracy: To 56 dB within 1 dB; 60 dB within 2 dB. a. Connect the VAC to the 1780R-Series CH B1 INPUT connector. Set the VAC output amplitude to 45.2 mV. b. Check that DC RESTORER–OFF is selected. c. Select INPUT–CH B1 on the 1780R-Series front panel. Press the MEASURE button to On.
Performance Verification 1 to 1 ±0.005 (0.995 to 1.005). Ch A Input to Picture Monitor Output: 1 to 1 ±0.02 (0.98 to 1.02). a. Connect the VAC output to the 1780R-Series CH A INPUT connector. Do not terminate. Check that the Black Burst signal is applied to the EXT REF connector. b. Check that the VAC output amplitude is set for 999.9 mV, the +Lum button is pressed in, the Lum/Sync button is out, and the correct television standard is selected. c. Select INPUT–CH A.
Performance Verification r. Move the VAC output signal from the CH B3 INPUT to the CH A INPUT. Connect a coaxial cable from the CH A INPUT loop-through connector to the +Input of the test oscilloscope Differential Comparator. s. Connect another coaxial cable from the PIX MON OUT connector, through a precision (0.2%) 75 W terminator, to the Differential Comparator –Input. NOTE. The precision terminator is listed under Auxiliary Equipment. It is also supplied with the Return Loss Bridge. t.
Performance Verification ae. Select RELATIVE on the Vectorscope CRT menu. Press the REFERENCE SET button. Note that the DV readout is 100.0% on the Waveform CRT. af. Move the coaxial cable with the 50 W-to-75 W minimum loss attenuator from the CH A INPUT connector to the AUX IN connector. (Check that the 700 mV sine wave signal is applied to the AUX IN connector.) ag. Select the FILTER–AUX input mode. ah.
Performance Verification Figure 4–8: Test equipment connections for checking CH A frequency response NOTE. Leave the termination connected to the PIX MON OUT connector for steps 11 through 15 unless directed otherwise. e. Check that the controls are set as follows: RIGHT DISPLAY–WFM, INPUT–CH A, REF–EXT, FILTER–FLAT, WFM HORIZONTAL– TWO–LINE, and WAVEFORM GAIN–Off. f. Set the generator output frequency to 50 kHz (reference).
Performance Verification k. Check set the generator to each of the following frequencies: 3.58 MHz (4.43 MHz for PAL), 5 MHz, 8 MHz, and 10 MHz. Use parts i. and j. as a guide for checking the frequency response at each given frequency. l. Set the generator frequency to 15 MHz. Set the generator output amplitude to obtain the same DMM reading as noted in part g. of this step. m. Check that the signal amplitude displayed on the Waveform CRT is 714 mV or 100 IRE in amplitude within +14.3 mV and –35.
Performance Verification a. Connect the leveled sine wave generator output, through a 50 W-to-75 W minimum loss attenuator, to the CH B2 INPUT connector. Do not terminate the loop-through connector. b. Select INPUT–CH B2. c. Check repeat step 11b. through 11p. to check the frequency response of the 1780R-Series CH B2 INPUT. Parts b., e., and p. should read “CH B2 INPUT” when using the step 11 procedure as a guide. Also, part j. should read ±14.3 mV for NTSC (±14.
Performance Verification c. Set the generator output frequency to 50 kHz (reference). Set the generator output amplitude so the Waveform CRT display is exactly 714 mV or 100 IRE for NTSC (or 700 mV for PAL) in amplitude. d. Set the generator output frequency to 1 MHz. e. Check that the Waveform CRT display amplitude is 714 mV for NTSC (700 mV for PAL) in amplitude within ±2% or ±14.3 mV or 2 IRE for NTSC (14.0 mV for PAL). f. Set the generator frequency to each of these frequencies: 3.58 MHz (4.
Performance Verification Figure 4–9: Connections for checking AUX OUT frequency response. (Only Ch 1 of the test oscilloscope dual-trace unit is used.) g. Set the generator to each of these frequencies: 3.58 MHz (4.43 MHz for PAL), 5 MHz, 8 MHz, and 10 MHz. h. Check the response for each frequency given in part g. of this step. The amplitude displayed on the test oscilloscope CRT should be within ±2% or ±14.3 mV for NTSC (±14.0 mV for PAL) of the amplitude noted in part d. of this step.
Performance Verification b. Select INPUT–PROBE and WFM HORIZONTAL ONE–FIELD mode of operation. Check that PROBE–X1 is selected on PAGE 2 of the Configure menu. c. Set the generator output frequency to 50 kHz (reference). Set the generator output amplitude so the display on the Waveform CRT is exactly 714 mV or 100 IRE for NTSC (700 mV for PAL) in amplitude. This is the reference amplitude. d. Set the generator frequency to 1 MHz. e.
Performance Verification 19. Check Lum/Chroma Gain Ratio Requirement: X1 Gain Ratio: 1:1 ±1%; X5 Gain Ratio:±0.5%. a. Connect a modulated 2T Pulse & Bar signal (12.5T NTSC, 10T PAL) from a Television Test Signal Generator through a 75 W feed-through terminator to the 1780R-Series CH A INPUT connector. b. Set the 1780R-Series controls as follows: INPUT–CH A, WFM HORIZONTAL ONE–LINE, and CONFIGURE–Off. Check that REF–EXT is selected. c.
Performance Verification c. Set the generator frequency to 50 kHz (reference). Set the generator output amplitude so the waveform CRT display is exactly 714 mV or 100 IRE in amplitude for NTSC (700 mV for PAL). d. Select FILTER–LUM mode. e. Check that the displayed amplitude is between 707 mV and 721 mV or 99 IRE and 101 IRE for NTSC (693 mV and 707 mV for PAL). f. Use the VERT POS control to position the bottom of the display to the graticule baseline (0 IRE for NTSC; 0.3 V for PAL). g.
Performance Verification x. Check that the displayed amplitude is equal to or greater than 500 mV or 70 IRE for NTSC (490 mV for PAL). y. Set the generator frequency to 2.68 MHz (3.53 MHz for PAL). z. Check that the displayed amplitude is equal to or less than 500 mV or 70 IRE for NTSC (490 mV for PAL). aa. Set the generator frequency to 4.18 MHz (5.03 MHz for PAL). ab. Check that the displayed amplitude is equal to or greater than 500 mV or 70 IRE for NTSC (490 mV for PAL). ac.
Performance Verification k. Check that the signal blanking level moves less than 3 IRE for NTSC (21 mV for PAL). l. Move the coaxial cable with its terminator from the CH A INPUT connector to the CH B1 INPUT connector. Select INPUT–CH B1 on the right front panel. m. Check Repeat parts c. through k. of this step to check CH B1. n. Move the coaxial cable with its terminator from the CH B1 INPUT connector to the CH B2 INPUT connector. Select INPUT–CH B2 on the right front panel. o. Check Repeat parts c.
Performance Verification c. Set the 1780R-Series WFM HORIZONTAL buttons to TWO–LINE. d. Press the CONFIGURE button to On. Check that COUPLING–DC and DC RESTORER–OFF are selected on the Configure menu. e. Set the sine wave oscillator amplitude control so that the display on the Waveform CRT is 100 IRE for NTSC (700 mV for PAL). f. Select WFM HORIZONTAL–TWO–FIELD mode. g. Select DC RESTORER–SLOW on the CONFIGURE menu. h.
Performance Verification b. Set the generator Luminance button to On (pressed in). c. Set the 1780R-Series controls as follows: INPUT to CH A, WFM HORIZONTAL to ONE–LINE, MAGNIFIER to 1.0 ms/DIV, and WAVEFORM GAIN to X5. d. Use the VERT POS control to move the signal baseline between the –40 IRE and +100 IRE graticule lines for NTSC (0 V and 1.0 V for PAL). e. Check that the bottom of the modulated pulse does not change more than 5 IRE for NTSC (36 mV for NTSC or PAL) as measured using the graticule.
Performance Verification 25. Check Filter DC Matching Supplemental: (not listed in Section 2); Matching: Within 10 IRE for NTSC (70 mV for PAL). a. Check that a Pulse & Bar signal is applied to the 1780R-Series CH A INPUT connector. b. Set the 1780R-Series controls as follows: Select WFM HORIZONTAL– THREE–LINE. Hold the left FILTER button in until the FLAT, LUM, and CHROM lights are On. Set the WAVEFORM GAIN to X5. Select COUPLING–GND on the Configure menu. c.
Performance Verification e. Set the 1780R-Series controls as follows: INPUT to AB1 and WAVEFORM GAIN to X5. f. Check that the amplitude is 3.5 IRE or less for NTSC (25 mV for NTSC or PAL) as displayed on the Waveform CRT. g. Set the sine wave oscillator frequency to 15 kHz. Select INPUT–CH A and set the WAVEFORM GAIN–X5 to Off. Repeat parts d. and e. h. Check that the amplitude is 3.5 IRE or less for NTSC (25 mV for NTSC or PAL) as displayed on the Waveform CRT. i.
Performance Verification button to CH B1 when setting the display reference amplitude and then select INPUT B1B3 to check common mode rejection). u. Disconnect the dual-input coupler and the sine wave signal from the instrument. 27. Check Differentiated Steps Requirement: Step Attenuation: ≥40 dB, 3.58 MHz, or 4.43 MHz. Step Amplitude: Within 2% of flat display. a.
Performance Verification a. Check that a 5-Step, 40 IRE Modulated Staircase signal is applied to the 1780R-Series CH A INPUT connector. For PAL, use a 280 mV Modulated Linearity signal. b. Connect a coaxial cable from the AUX OUT connector of the 1780R-Series instrument under test to the Ch A Input of a test vectorscope. Connect an end-line termination to the Ch A Input loop-through connector on the test vectorscope.
Performance Verification d. Check that the 2T pulse amplitude is 1 IRE or less for NTSC (7 mV for PAL) than the 2T bar amplitude. e. Check that the 2T bar tilts 1 IRE or less for NTSC (7 mV for PAL). f. Change the generator output signal to Field Square Wave. Select WFM HORIZONTAL–ONE–FIELD mode on the 1780R-Series front panel. g. Check that the Field Square Wave signal tilts 1 IRE or less for NTSC (7 mV for PAL). h. Select WFM HORIZONTAL–TWO–LINE mode. i.
Performance Verification l. Disconnect the VAC signal from the PROBE input connector. 31. Check Calibrator Output Voltage for Probe Requirement: CAL OUT Voltage: 1.0 V ±0.5%. a. Connect the BNC connector end of a 1X probe to the 1780R-Series PROBE input connector. b. Connect the probe tip through a BNC to Probe Adapter to the VAC Output connector. c. Set the VAC readout to 999.9 mV. d.
Performance Verification 32. Check Probe Tilt and Non-Linear Distortion Requirement: Tilt: Less than 5% on a 50 Hz square wave (less than 4% when using a 60 Hz square wave). a. Apply a Field Square Wave from the Pulse & Bar module of the television test signal generator, through a 75 W feed-through terminator, to the 1780R-Series PROBE input connector. b.
Performance Verification h. Select CURSOR 1 on the Waveform CRT. i. Turn the Precision Measurement knob so that CURSOR 1 bright-up spot overlays CURSOR 2 bright-up spot. j. Check that the DT readout on the Waveform CRT is between 63.550 ms and 63.560 ms. (The readout for PAL should be between 63.995 ms and 64.005 ms.) k. Set the TIME CURSORS button to Off. l. Disconnect the Color Bar signal from the instrument. 34. Check Sweep Rates and Timing Accuracy Requirement: See Table 4–4.
Performance Verification c. Use the 1780R-Series VERT POS and HORIZ POS controls to position the trace on the graticule baseline so that it starts at the first major graticule mark (located at the start or left end of the baseline) on the Waveform CRT. The graticule baseline is 0 IRE for NTSC; 0.3 V for PAL. d. Press the TIME CURSORS button to On and select LOCATE (on the Vectorscope CRT Timing Cursors menu). Check that CURSOR 1 is selected. e.
Performance Verification n. Set the TIME CURSORS button to Off and the MAGNIFIER to OFF. 35. Check Variable Sweep Range Requirement: Range: >±20%. a. Connect the television test signal generator Color Bar signal through a 75 W feed-through terminator to the 1780R-Series CH A INPUT connector. b. Set the Select WFM HORIZONTAL THREE–LINE mode. c. Note the number of divisions that the three-line waveform display occupies. d. Set the VAR/SLOW button to VAR. e.
Performance Verification c. Rotate the Precision Measurement control to select Line 263 for the 1780R NTSC instrument. For PAL, go to parts e. and f. d. Check that there is a one-half color display line located on the left side of the Waveform CRT screen. Check that there is no Color Bar signal displayed on the right side of the screen. e. For the 1781R PAL instrument, select LINE SEL MENU–ON, FIELD 4 OF 8, and FIELD 1, 5, 3, 7 on the Waveform CRT. Turn the Precision Measurement control to select Line 310.
Performance Verification h. Connect the output of the function generator to the test oscilloscope vertical amplifier input. Set the generator controls for 0 V to +10 V square waves as displayed on the test oscilloscope CRT. i. Disconnect the function generator output signal from the test oscilloscope. Connect the generator output square wave signal to the RGB Parade Display Test Connector input BNC connector. j. Check that the first or left-hand waveform ends 6.7 major divisions ±0.
Performance Verification c. Check and/or set the 1780R-Series controls as follows: LEFT DISPLAY–VECT, RIGHT DISPLAY–WFM, REF–EXT, and WFM HORIZONTAL ONE–LINE. d. Press the MEASURE button to On. Select DIFF GAIN, SINGLE, and NOISE REDUCTION–OFF on the Vectorscope CRT menu. e. Check that the VECTOR GAIN–VAR is On. Turn the variable VECTOR GAIN control so that the modulation vector dot is located on the compass rose as displayed on the Vectorscope CRT. f.
Performance Verification t. Select SINGLE and NOISE REDUCTION–OFF on the Vectorscope CRT menu. Press the MEASURE button to exit the menu. u. Leave the 5-Step Staircase signal connected to CH A INPUT. 40. Check Differential Phase Requirement: Deflection Factor: 5_ dP deflects the trace 50 IRE (NTSC) or 500 mV (PAL) within a tolerance of ±5%. Residual dP: ≤0.1_, last 90% of trace. Calibrated dP Resolution: 0.05_; Accuracy: ±0.1_ over full 360_, External Reference ±0.2 burst lock. Range: 360_. a.
Performance Verification o. Leave the MEASURE button set to On. p. Leave the 5-Step Staircase test signal from the CH A INPUT connector. 41. Check Recursive Filter SUPPLEMENT Approximately 15 dB signal-to-noise reduction with filter selected. a. Check that a Modulated 5-Step Staircase signal from the television test signal generator is applied to the 1780R-Series CH A INPUT connector. Check that CH A INPUT is terminated. b. Check that the 1780R-Series MEASURE button is set to On.
Performance Verification e. Set the television test signal generator Variable Sync to On. Adjust the Variable Sync control to obtain minimum output amplitude (14 dB reduction; i.e., <8 IRE amplitude for NTSC; <57 mV for PAL). f. Check that the Waveform CRT display is locked. g. Set the test signal generator Variable Sync to Off. h. Disconnect the Black Burst signal and the five feed-through terminators from the CH A INPUT connector. 43. Check External Sync Input Requirement: Black Burst: –14 dB to +6 dB.
Performance Verification a. Check that the television test signal generator Color Bar signal is applied to the 1780R-Series CH A INPUT connector. Check that the generator Black Burst signal is applied to the EXT REF connector and this connector is terminated into 75 W. b. Check and/or set the 1780R-Series controls as follows: REF–EXT, WFM HORIZONTAL–TWO–LINE, CONFIGURE button–On, SYNC–AFC, COUPLING–DC, and DC RESTORER–OFF. c.
Performance Verification b. Select REF–INT on the 1780R-Series front panel. Adjust the generator Linearity Rate control so the signal bounce rate is approximately two seconds. c. Set the 1780R-Series VAR/SLOW button to SLOW. Press the CONFIGURE button to On and select the PAGE 3 menu. Check that SLOW SWEEP TRIG + is selected. d. Check that the Waveform CRT display begins at maximum APL.
Performance Verification e. Disconnect the Remote Sync Input Connector from the instrument. Leave the Color Bar signal connected to CH A INPUT. 47. Check Digital Phase Shifter Requirement: Phase Accuracy: 0.1_. a. Check that a television test signal generator Color Bar signal is applied through a 75 W feed-through terminator to the 1780R-Series CH A INPUT connector. b. Connect the television test signal generator front-panel Subcarrier signal to the EXT CW REF connector.
Performance Verification o. Turn the Subcarrier dial on the television test signal generator to place the red vector dot on the 210_ graticule line on the 1780R-Series Vectorscope CRT. Turn the 1780R-Series Precision Measurement control to reposition the red vector dot back to the 180_ graticule line. p. Check Repeat parts j. through o. eleven more times to check the complete compass rose (in 30_ increments). Check that the PHASE readout for each 30_ increment is the same, within 0.
Performance Verification Figure 4–10: Vector graticule showing the –3 dB points for checking frequency response f. Set the generator output frequency to 2.979545 MHz for NTSC (3.833619 MHz for PAL). g. Check that the circle displayed on the Vectorscope CRT is smaller than the 3 dB marks. h. Set the generator output frequency to 3.979545 MHz and then to 4.179545 MHz. (Use 4.833619 MHz and 5.033619 MHz for PAL.) i. Check that, at 3.979545 MHz, the circle is larger than the 3 dB marks; at 4.
Performance Verification d. Check that the color vector dots are located within 50% of the distance between the center of the boxes and edges of the boxes. e. Check that the button under the Vectorscope CRT is On. Press the CALIBRATE button and select the CAL OSC–ON pad on the Waveform CRT. f. Check that the test circles are overlayed within 0.36 mm (typically one trace width) and located on the compass rose as displayed on the Vectorscope CRT. g. Press the CONFIGURE button and select PAGE 2 menu.
Performance Verification f. Set the test oscilloscope dual trace amplifier controls as follows: Ch 1 Volts/Div to 0.1 V, Input Coupling to DC, Display Mode to Ch 1, and the Trigger Source to Ch 1. Set the Time Base controls as follows: Mode to Auto, Coupling to DC, Source to Int, and the Time/ Div to 1 ms. g. Set the 1780R-Series front-panel controls as follows: Select the VECTOR GAIN–VAR mode. Press the PHASE SHIFT button to On. h.
Performance Verification v. Move the Color Bar signal to the CH B3 INPUT connector and terminate into 75 W. Select INPUT–CH B3. w. Check Use parts p. through s. as a guide for checking CH B3. x. Set the VECTOR GAIN–VAR to Off. y. Leave the Color Bar signal connected to the CH A INPUT connector. 51. Check Vector Display Clamp Stability and Position Range Requirement: Clamp Stability: 1/64-inch (0.4 mm) or less. Vertical and Horizontal Position Control Range: 1/4-inch (6 mm) from center. a.
Performance Verification d. Set the 1780R-Series VECTOR GAIN to VAR. Turn the variable VECTOR GAIN control counterclockwise until the circle is its smallest size. e. Note the amplitude of the display on the Waveform CRT. f. Set the generator output amplitude so that it is twice the amplitude noted in part e. of this step. Note this amplitude on the Waveform CRT. g. Check that the circle is located inside the compass rose. h.
Performance Verification h. Adjust the variable VECTOR GAIN control so that the burst vector length reaches the 20% DG mark on the 180_ graticule line. i. Turn the Precision Measurement control to null the burst. j. Check that the PHASE readout on the Vectorscope CRT is between +1.00_ and –1.00_. k. Set the VECTOR GAIN–VAR mode to Off. Press the MEASURE button to exit the menu. l. Disconnect the Color Bar signal and 75 W terminator from the instrument. 54.
Performance Verification Figure 4–11: Properly adjusted xy input gains 55. Check X Y Frequency Response Requirement: Frequency Response: DC to >500 kHz. a. Connect the leveled sine wave generator output signal to pin 3 of the 1780R-Series rear panel X Y INPUT connector. Use the X Y INPUT connector listed in the Auxiliary Equipment to make the connections. Connect pin 1 to ground. Connect the generator ground to pin 1. b. Check that LEFT DISPLAY–XY is selected. c.
Performance Verification NOTE. Perform parts i. through o. of this step only if the internal jumpers for A6J108 and A6J205 are installed to operate the instrument in the High Gain mode. i. Connect the sine wave oscillator to pin 11 and ground pin 9 of the X Y INPUT connector. j. Set the sine wave oscillator output frequency to approximately 10 kHz and adjust its amplitude for a display equal to the diameter of the graticule compass rose. k. Set the oscillator frequency to 100 kHz. l.
Performance Verification e. Check that the SCH dot is located near the compass rose and that it is within 5_ of the 180_ axis for NTSC or PAL. f. Connect the Frame/Black (NTSC) or Frame Ref (PAL) signal from the television generator to the CH 1 Input to the test scope dual trace amplifier. Connect the 1780R-Series LINE STROBE OUT to the CH 2 Input of the dual trace amplifier. See Figure 4–12. Figure 4–12: Connections for checking line strobe pulse timing NOTE.
Performance Verification Check that the generator is internally connected so that the SCH can be varied. (Refer to P339 on the generator A21 Sync Lock board.) l. Check that by turning the generator Subcarrier Phase control clockwise, the SCH dot “flips” between 80_ and 115_ (typical range). SCH phase can be varied ±70_ from 0_ without changing fields. If this performance requirement and the one described in part e. of this step are met, the 360_ requirement will also be met. m.
Performance Verification e. Turn the Precision Measurement control so that the waveform blanking level is aligned parallel with the CRT graticule baseline (0 IRE for NTSC; 0.3 V for PAL). The electronic graticule horizontal line will also be parallel with its nearest CRT graticule line. f. Turn the Precision Measurement control each direction. g. Check that the horizontal line, vertical line, and waveform will rotate equal to or greater than ±1_ from their original position. h.
Performance Verification Figure 4–13: Setting up the Return Loss Bridge: a) setup 500 mV amplitude; b) Nulling the bridge NOTE. The Return Loss Bridge must null within 0.5 mV. If the Bridge does not null within this amplitude, the Bridge must be recalibrated before checking the 1780R-Series instrument return loss. e. Remove the Red terminator from the Unknown arm. Connect the Unknown arm to the 1780R-Series CH A INPUT.
Performance Verification Figure 4–14: Measuring return loss of 1780R-Series CH A INPUT f. Check that the return loss of the CH A INPUT is better than 40 dB for a frequency range from 50 kHz (reference) to 5 MHz. Make this check, within this frequency range, with instrument power on and off. (40 dB converts to 5 mV on the test oscilloscope CRT display.) Check return loss of CH B1, CH B2, and CH B3 using the same technique as checking the CH A INPUT. g.
Performance Verification 4–68 1780R-Series Service Manual
Adjustment Procedures This section of the 1780R-Series Service Manual consists of an Adjustment Procedure. The Performance Verification is used to evaluate operation of the instrument as specified in the Performance Requirements in Specifications. The Adjustment Procedure is used to return the instrument to operate within its Performance Requirements. Prior to attempting recalibration, use the Performance Check Procedure to check the instrument.
Adjustment Procedures Figure 5–1: Simplified representation of the 1780R-Series Video Measurement Set, showing the location of the four control groups The Precision Measurement Control is multifunctional. Its function is assigned either by the accompanying switches or through one of the CRT displayed menus. The current function for the control is always denoted on the appropriate CRT by a circle surrounding the related readout. See Figure 5–2 for a sample menu.
Adjustment Procedures The <> switches below the Precision Measurement Control knob duplicate its function, allowing a single increment of change per push. The instrument is made up of a number of etched circuit boards. Adjustments are present on most of the boards, making it necessary to first find the circuit board and then find the adjustment. This procedure contains a number of small illustrations that can be used to locate the adjustments.
Adjustment Procedures Recommended Equipment List Table 5–1: Recommended Equipment Electrical Instrument Performance Requirements Example Vertical Amplifier Differential Comparator with 30 MHz bandwidth and 1 mV sensitivity. DualTrace Amplifier with 30 MHz bandwidth and 5 mV sensitivity. Time Base 10 ns/div to 5 ms/div sweep speeds; triggering to 5 MHz.
Adjustment Procedures Table 5–1: Recommended Equipment (Cont.) Electrical Instrument Performance Requirements Example 5. Leveled Sine Wave Generator Flatness 1%, 250 kHz to 50 MHz. The flatness can be characterized (a chart made of variations) with the TEKTRONIX Peak-to-Peak Detector (015-0408-00). TEKTRONIX SG503 Leveled Sine Wave Generator installed in a TEKTRONIX TM500 Series Power Module.
Adjustment Procedures Table 5–1: Recommended Equipment (Cont.) Electrical Instrument Performance Requirements Example Five required, three must be a feedthrough type. Two 75 W End-line Terminators (Tektronix Part No. 011-0102-00). Auxiliary Equipment 14. 75 W Terminators 15. 75 W Coaxial Cables Three 42 inch cables, with BNC connectors are required. 16. Dual Input Coupler Matched BNC cable-T for matching input gains. Length of arms matched to within ±0.1 in. 17.
Adjustment Procedures Figure 5–4: Rear view of the X Y plug connections. (Pins 2, 4, 6, 10, 12, and 14 can be used to make ground connections.
Adjustment Procedures Adjustment List Table 5–2 lists all of the adjustments by step number sequence. This table can be used as a short form adjustment procedure for those who are familiar with the adjustment procedure for the 1780R-Series.
Adjustment Procedures Table 5–2: 1780R-Series Adjustments for Calibration Procedure (Cont.
Adjustment Procedures Table 5–2: 1780R-Series Adjustments for Calibration Procedure (Cont.
Adjustment Procedures Table 5–2: 1780R-Series Adjustments for Calibration Procedure (Cont.
Adjustment Procedures Procedure This Adjustment Procedure is a continuous sequential procedure. If a step is performed out of sequence, pertinent control settings are given within the step. Remaining control settings can be determined by referring to Table 5–3; however, sometimes it may be necessary to go back one or more steps to check for possible changes.
Adjustment Procedures 1. Equipment Connections a. Connect the television test signal generator Color Bar signal, through a 75 W feed-through terminator, to the 1780R-Series CH A INPUT connector. See Figure 5–6. Figure 5–6: Initial signal connections for re-adjustment of the 1780R-Series b. Connect the television test signal generator Black Burst signal to the 1780R-Series EXT REF. Terminate the remaining side of the loopthrough connector with a 75 W terminator. NOTE.
Adjustment Procedures f. Set the PHASE SHIFT button to Off, the CALIBRATE button to On, and the button below the Vectorscope CRT to On. g. Use the Precision Measurement control to adjust for desired Vectorscope CRT readout intensity. h. Press the button below the Waveform CRT to On. i. Turn the Precision Measurement control to obtain the desired Waveform CRT readout intensity. j. Press the CALIBRATE button to exit the menu. 2. Adjust Power Supplies a.
Adjustment Procedures Figure 5–7: Adjustment and test point locations on the Waveform HV Supply circuit board (Assembly 16.) NOTE. The +5 V supply is the reference supply for the instrument. If it is adjusted, the entire instrument will need to be recalibrated. Do not adjust the +5 V supply if it is within listed tolerance. The +5 V supply affects both the + and –15 V supplies. The +5 V supply can be set anywhere within its tolerance to ensure that the other supplies are within specification. b.
Adjustment Procedures Select . This indicates that the instrument has a continuous Horizontal Position control (dual wiper potentiometer). Select . Timing cursor dots are placed on the Voltage Cursors when in Line Select for ease in viewing. Voltage Cursors are automatically enabled when entering Line Select. 4. Adjust Waveform CRT Intensity a. Set the 1780R-Series INPUT selection to CH B1 for no signal input. Select WFM HORIZONTAL-TWO-LINE mode.
Adjustment Procedures d. Set the 1780R-Series front-panel SCALE and INTENSITY controls for normal brightness. Figure 5–8: Adjustment locations on the Vectorscope HV Supply circuit board (Assembly A3) 7. Adjust Vector Astigmatism and Focus a. Set the front-panel FOCUS control to midrange between “beeps.” b. Adjust Focus (A3R182) and Astigmatism (A3R200) for a well-defined vector display. See Figure 5–8. 8. Adjust Readout Character Symmetry and DAC Gain a.
Adjustment Procedures Figure 5–9: Adjustment locations on the Microprocessor circuit board (Assembly A5) e. Press the CALIBRATE button. Select VOLTAGE CURSORS ZERO SET on the Vectorscope CRT menu. f. Use the VERT POS control to center the nulled cursors on the Waveform CRT. If the cursors are not overlayed, use the Precision Measurement control to null the cursors so they appear as one trace. g. Press the REFERENCE SET button. Check that the DV readout is 0 mV on the Waveform CRT. h.
Adjustment Procedures Figure 5–10: Waveform circuit board (Assembly A2) adjustment, test point, and jumper locations.
Adjustment Procedures q. Select RIGHT DISPLAY-WFM mode. Press the CONFIGURE button to On and select COUPLING-DC on PAGE 1. Press the CONFIGURE button to exit the menu. r. Disconnect the DMM test leads from A2U810. NOTE. Leave the 1780R-Series INPUT selection set to CH B1 so that no input signal is displayed when performing Steps 8 through 11. 9. Adjust Waveform CRT Trace Rotation, Orthogonality, and Geometry a. Push the 1780R-Series CALIBRATE button. b. Check that the button under the Waveform CRT is On.
Adjustment Procedures 11. Adjust Vector CRT Trace Rotation, Orthogonality, and Geometry a. Press the button under the Vectorscope CRT to On. b. Touch the TRACE ROTATION pad on the Waveform CRT. Be sure that the circle surrounds the words TRACE ROTATION. c. Turn the Precision Measurement Control to align the horizontal lines of the electronic graticule parallel with the Vectorscope CRT graticule. d.
Adjustment Procedures d. Press the CALIBRATE button to exit the menu. 13. Adjust Picture Monitor a. Set 1780R-Series INPUT selection to CH A. b. Select the LEFT DISPLAY-PIX mode. c. Adjust Pix Vert Position (A6R407), Pix Vert Gain (A6R404), Pix Horiz Gain (A6R604), and Pix Horiz Pos (A6R606) for a slightly underscanned picture monitor display. (There should be a narrow black border about 1/16-inch to 1/8-inch or 1.5 mm to 3 mm at the edges of the display.) d. Select the LEFT DISPLAY-VECT mode. e.
Adjustment Procedures d. Set the VAC for a 999.9 mV output amplitude. Check that the +Lum button is pressed in and the Lum/Sync button is out. Check that the correct television standard (NTSC, PAL, or PAL-M) is selected. NOTE. Leave VAC +Lum and Lum/Sync buttons and television standard set as described in part d of Step 13 whenever the VAC is used in this Adjustment Procedure. e. Select the RIGHT DISPLAY–WFM+CAL mode. Change FIX to VAR on the Waveform CRT menu.
Adjustment Procedures remain lit but not the A-B1 selection.) The display should become a nearly flat trace and the left CRT should display the messages: g. If these messages are not displayed, repeat part f. of this step. Move quickly from touching the screen to selecting the A-B1 INPUT; otherwise, the messages may not appear. h. Adjust LF CMR (A2R1033) for minimum amplitude. i. Touch the message “TOUCH HERE TO EXIT.” Press the CONFIGURE button to exit the menu.
Adjustment Procedures Figure 5–13: Input & BNC circuit board (A8) adjustments, shown as they would appear with the instrument on its left side 17. Match Input Gains a. Connect the VAC output cable to a dual input coupler. b. Connect one side of the coupler to the CH B1 INPUT and the other side to the CH A INPUT of the 1780R-Series instrument. Check that the Black Burst signal is applied to the EXT REF connector. See Figure 5–14. c. Select A-B1 INPUT. d. Check that the VAC is set to 999.9 mV. e.
Adjustment Procedures Figure 5–14: Test equipment connections for matching CH A and CH B1 input gains. j. Move the side of the dual input coupler from the 1780R-Series CH B2 INPUT to the CH B3 INPUT. k. Select 1780R-Series B1-B3 INPUT. l. Adjust Gain B3 (A8R394) for minimum amplitude or null display. m. Select INPUT-CH A and set the WAVEFORM GAIN-X5 to Off. n. Disconnect the dual input coupler and the VAC signal from the CH A INPUT. 18. Adjust Waveform Variable Gain Registration a.
Adjustment Procedures NOTE. To eliminate generator signal DC level error, if present, when performing parts e. through h. of this step, select COUPLING-GND on PAGE 1 of the Configure menu. Use the VERT POS control to position the trace to the Waveform CRT graticule baseline. Perform parts e. through h. and j. through m. f. Set the WAVEFORM GAIN-X5 to On. g. Use the VERT POS control to position the backporch to the graticule baseline. h.
Adjustment Procedures e. Adjust Var Gain Centering (A2R514) for a Calibrator signal amplitude of 65 IRE for NTSC (or 450 mV for either NTSC or PAL). f. Press the CONFIGURE button and select COUPLING-DC. g. For NTSC only: Check that ABS UNITS-mV is selected on PAGE 2. h. Set the VAR WAVEFORM GAIN to Off. i. Press the CALIBRATE button. Select CAL SIGNAL-ON and VERT CAL. j. Check that REF-EXT and WFM HORIZONTAL-ONE-LINE are selected on the right front panel. k.
Adjustment Procedures e. Check that the Voltage Cursors menu on the Vectorscope CRT indicates that ABSOLUTE and SEPARATE are selected. If not, make this selection. f. Use the Precision Measurement control to overlay CURSOR 1 trace on the calibrator upper trace. Touch CURSOR 2 pad and overlay the CURSOR 2 trace over the calibrator lower trace. The DV readout should be 1000 mV within a tolerance of ±2 mV. If it is not, turn the Precision Measurement control so that the DV readout is exactly 1000 mV. g.
Adjustment Procedures NOTE. Typically, A2R612 is set fully counterclockwise and A2R418 is set fully clockwise. A2R534 is set nearly fully clockwise. f. Set the WAVEFORM GAIN to X5. g. Set the generator multiburst frequency range to Low. h. Adjust Limiter (A2R628) until the off-screen recovery is good; that is, the display is not distorted. If the waveform display is distorted, turn A2R628 fully counterclockwise. Then, turn the adjustment clockwise until the display is undistorted. i.
Adjustment Procedures Figure 5–15: Test equipment connections for adjusting CH A frequency response t. Adjust A2C527 for 100 IRE (700 mV for PAL) signal amplitude on the Waveform CRT. u. Recheck the amplitudes at 3.58 MHz (4.43 MHz for PAL) and 5 MHz. Readjust A2C611 and A2C527 if necessary. v. Set the generator frequency to 10 MHz and the proper amplitude as noted in part p. of this step. w. Adjust A2C418 for a 101 IRE (707 mV for PAL) signal amplitude as displayed on the Waveform CRT. NOTE.
Adjustment Procedures NOTE. Repeat parts v. through y. of this step, as necessary, to obtain the frequency response described. z. Adjust the generator frequency and check for a decreased amplitude of 1% to 3% at 15 MHz, and 4%to 7% at 20 MHz. If the amplitudes at these frequencies are incorrect, then adjust A2R534 slightly counterclockwise to increase the rolloff, or clockwise to decrease the rolloff. aa. Repeat parts k. through y., if necessary, to obtain proper frequency response. ab.
Adjustment Procedures c. Select the following 1780R-Series settings: INPUT A-B1, WAVEFORM HORIZONTAL-ONE-FIELD, and WAVEFORM GAIN-X5-On. NOTE. Do not turn the CMR adjustments given in parts d., g., and j. of this step if chrominance nulls within 14 IRE for NTSC (100 mV for PAL). d. Adjust B1 CMR (A2C1329, A2R1333) for best nulled display. Chrominance should be nulled within 14 IRE for NTSC (100 mV for PAL). e. Move the dual-input coupler from CH A INPUT to CH B2 INPUT. f. Select the B1-B2 INPUT mode. g.
Adjustment Procedures amplitude so the Waveform CRT display is 100 IRE (700 mV for PAL) in amplitude. f. Adjust the peak-to-peak detector amplifier +Level control to turn on the green light. Note the DMM reading. g. Set the generator frequency to 10 MHz and adjust the output amplitude to obtain the same DMM reading as noted in part f. of this step. h. Check that the Waveform CRT display amplitude is 100 IRE (700 mV for PAL). i.
Adjustment Procedures e. Disconnect the equipment from CH B3 INPUT. f. Disconnect the termination from the PIX MON OUT connector. 27. Adjust Luminance Filter Transient Response (Chroma Rejection) a. Connect a Color Bar signal to the 1780R-Series CH A INPUT. Terminate the opposite side of the loop-through into 75 W. b. Select INPUT-CH A, FILTER-LUM, and WFM HORIZONTAL-TWOLINE mode of operation. c. Adjust Lum Trans Resp (A2L947, A2L951) for squarest leading corner on the white bar. d.
Adjustment Procedures c. Set the leveled sine wave generator output frequency to 3.58 MHz (4.43 MHz for PAL) and its output amplitude to 100 IRE for NTSC (700 mV for PAL). d. Select FILTER-CHROM mode. Check that WFM HORIZONTAL-ONELINE is selected. NOTE. In most cases, only the Chrom Gain (A2R828) may need to be adjusted to obtain proper gain (100 IRE for NTSC; 700 mV for PAL). BP 1 and BP 2 can remain at their factory-adjusted settings. e.
Adjustment Procedures p. Check that FILTER-CHROM and ONE-LINE are still selected. q. Set the television test signal generator for Horizontal Unlock. r. Use the 1780R VERT POS and HORIZ POS to center the green-magenta transition on the Waveform CRT. s. Set the WFM HORIZONTAL MAGNIFIER to 0.25 ms/DIV. t. Check for minimum green-magenta transition amplitude on the Waveform CRT display. Typical amplitude is between one and two trace widths. u. Set the television test signal generator for Horizontal Lock.
Adjustment Procedures j. Select the FILTER-FLAT mode. Select COUPLING-DC on the Configure menu. Press the CONFIGURE button to exit the menu. 32. Adjust Horizontal Timing NOTE. Perform Step 39, Adjust Timing Cursors, before checking and adjusting horizontal timing. a. Check that no signal is applied to the CH A INPUT. b. Check that the television test signal generator Black Burst signal is connected to the 1780R-Series EXT REF connector. Check that this loop-through connector is terminated into 75 W. c.
Adjustment Procedures k. Adjust the Precision Measurement control so that the CURSOR 1 and CURSOR 2 dots are exactly 10 divisions apart (The bright-up dots should coincide with the 2nd and 12th major graticule marks when the DT readout is exactly 100.000 ms.) NOTE. The dots may have to be set slightly short (1/8 to 1/4 of a minor division so that the X5, X10, and X20 sweep timing will meet their performance requirements. l. Push the CALIBRATE button to exit the HORIZ CAL mode. m.
Adjustment Procedures d. Use the HORIZ POS control to position the center of the vertical sync to the mid-screen graticule mark. e. Set the WFM HORIZONTAL-MAGNIFIER to OFF. f. Adjust H Mag Reg (A2R344) to center the vertical sync on the screen. g. Disconnect the Color Bar signal from the CH A INPUT. NOTE. If A2R344 was adjusted, go to step 9. Readjust WFM Readout H Center (A2R170) and WFM Readout Gain (A2R167). 34. Adjust Slow Sweep Trigger Level a.
Adjustment Procedures Variable resistors are shown rotated 90_ from the way they are mounted on the assembly; variable resistors are adjustable from the top of the circuit board. Figure 5–16: Adjustment and test point (TP) locations for the Oscillator circuit board (Assembly A7). NOTE. The adjustments given in parts d., f., and h. should not be adjusted if the voltages at the test points are within tolerance. d. Adjust Burst Lock Center Freq (A7C182) for 2.0 V ±2.0 V. e.
Adjustment Procedures m. Adjust DC Balance (A7R286) so that the NTSC demodulated burst pulse overlays the demodulated baseline as displayed on the test oscilloscope. (For PAL, there are two bursts. Adjust the burst that will null.) n. Disconnect the test oscilloscope probe from the test point. Disconnect the Black Burst signal from the 1780R-Series CH A INPUT. 36. Adjust Vector Gains a. Connect the television test signal generator 5-Step, 40 IRE Modulated Staircase signal to the 1780R-Series CH A INPUT.
Adjustment Procedures l. Use the variable VECTOR GAIN control to place the burst vector dot(s) to the graticule reference 75% mark(s). If necessary, use the VERT and HORIZ POS controls to center the vector display center dot. m. Remove the 75 W termination from CH A INPUT. n. Turn the variable VECTOR GAIN control fully counterclockwise to its minimum gain position. Check that the vector display center dot is centered. o.
Adjustment Procedures ab. Note the exact phase position of the burst vector(s) for use as a reference. NOTE. The front-panel variable VECTOR GAIN control can be used to move the burst vector to the compass rose while performing parts bb. through ee. ac. Set the television test signal generator Color Bar Ampl button to 100%. ad. Push the CONFIGURE button. Select PAGE 2 and touch the BARS-100% pad. Press the CONFIGURE button to exit the menu. ae.
Adjustment Procedures d. Set the VECTOR GAIN to VAR. e. Move the subcarrier vector to the Vectorscope CRT compass rose using the variable VECTOR GAIN control. f. Connect the 10X probe from the test oscilloscope to A6TP379 on the Vectorscope board. Set the test oscilloscope vertical deflection factor to 0.5 V/Div, Input Coupling to DC, and sweep rate to 10 ms/Div. Check that the generator 180_ Subcarrier is set to On. (For PAL, check that the U Subcarrier is On.) g.
Adjustment Procedures NOTE. Repeat parts p. through t. of this step, if necessary, for proper deflection. u. Touch the GO TO DIFF GAIN pad on the Vectorscope CRT. Check that SINGLE is selected. Use the variable VECTOR GAIN control to position the burst vector to the CRT compass rose. v. Use the Precision Measurement control to move the chroma of the differential gain display to the graticule baseline. w. Press the REFERENCE SET button. x. Rotate the Precision Measurement control for a D GAIN readout of 5.
Adjustment Procedures ah. Touch the GO TO DIFF PHASE pad on the Vectorscope CRT. Check that DOUBLE is selected. ai. Press the button located below the left CRT. Use the VERT and HORIZ POS controls to position the vector center dot to the center of the Vectorscope CRT. Rotate the Precision Measurement control to position the vector dot to the 180° reference line. aj. Adjust DP Zero (A6C172) to overlay the chroma lines using the first packet. ak. Push the MEASURE button to exit this mode. al.
Adjustment Procedures Figure 5–18: Noise Reduction-OFF. Demod offset properly adjusted 38. Adjust SCH Phase a. Connect a Color Bar signal from a TEKTRONIX TSG-170A NTSC Television Generator to the 1780R CH A INPUT connector. Connect a 75 W end-line termination to the remaining CH A INPUT connector. Connect the generator Black Burst signal to the EXT REF connector. Check that the EXT REF loop-through connector is terminated into 75 W. (Use a TSG-271 PAL Generator for the 1781R.) b.
Adjustment Procedures –Slope and Normal mode triggering. (For PAL, set the time base to 20 ms/Div.) g. Check that the 1780R-Series WFM HORIZONTAL-ONE-LINE (or TWO-LINE) is selected. Press the LINE SELECT button to On. Select LINE SEL MENU-ON, WFM= VECT-YES, and FIELD 1 OF 4 for NTSC (FIELD 2 OF 8 for PAL). These selections are made on the Vectorscope CRT menu. h. Adjust Ref SCH Adj (A2R1263) so the timing of the Ch 2 pulses coincide with the Ch 1 pulses as displayed on the test oscilloscope CRT.
Adjustment Procedures r. If necessary, move the jumper on A2J986 so the SCH dot is closest to the burst vector reference line as displayed on the Vectorscope CRT. (That is, close to the 0_ mark on the graticule dQ scale.) NOTE. The jumper on A2J986 should be left at the position set by the factory. s. Adjust Fine SCH Adj. (A2R1281) for 0 SCH (using the 0_ mark on the graticule dQ scale.) t. Disconnect the TSG-170A (or TSG-271) and the feed-through terminator from the 1780R-Series instrument.
Adjustment Procedures Figure 5–19: Z-Axis circuit board (A4) adjustment and test point locations e. Disconnect the probe from A4TP108. f. Connect a 10X probe from the test oscilloscope vertical input to A4TP100. Set the test oscilloscope vertical deflection factor to 2 V/ Div and the sweep rate to 2 ms/Div. g. Adjust Cursor Clock Centering (A4L115) for a DC level of +8 V at ambient room temperature. h. Disconnect the 10X probe from the test point. i. Select CONFIGURE-On and PAGE 3.
Adjustment Procedures a. Connect a Pulse & Bar signal from a TEKTRONIX TSG170A NTSC Television Generator to the 1780R CH A INPUT connector. (For the 1781R, use the TSG271 PAL Generator.) b. Select REF-INT on the 1780R-Series front panel. c. Press the button below the Vectorscope CRT to On. Press the PHASE SHIFT button and use the Precision Measurement control to place the burst vector dot(s) on the reference line(s). d. Press the MEASURE button. Touch the CHROMA/LUM pad on the Vectorscope CRT.
Adjustment Procedures Figure 5–20: Vector graticule x- and y-axis markings for adjusting xy input gains f. Move the generator output connections to pin 5 (–Y) and pin 7 (+Y) on the XY Input connector. g. Adjust Y Gain (A6R308) so the vertical trace is as long as the vertical axis graticule line located inside the compass rose on the Vectorscope CRT. See Figure 5–20. h. Connect the generator –Output to pins 1 and 5 of the XY Input connector.
Adjustment Procedures Figure 5–21: Properly adjusted xy input gains 42. Adjust RGB/YRGB a. Connect a Color Bar signal from the television test signal generator, through a 75 W feed-through terminator, to the 1780R-Series CH A INPUT. b. Check that a Black Burst signal is applied to the 1780R-Series EXT REF connector and this connector is terminated into 75 W. c. Select 1780R-Series RIGHT DISPLAY-WFM and REF-EXT. Check that INPUT-CH A and WFM HORIZONTAL-ONE-LINE are selected. d.
Adjustment Procedures h. Connect the output of the function generator to the test oscilloscope vertical amplifier input. Set the generator controls for 1 kHz, 0 V to +10 V, square waves as displayed on the test oscilloscope CRT. i. Disconnect the function generator output signal from the test oscilloscope. Connect the generator output square wave signal to the RGB Parade Display Test Connector input BNC connector. j. Adjust RGB/YRGB Staircase Comp (A5C195) for no smearing. k.
Adjustment Procedures j. Press the LINE SELECT button to turn it off. If necessary, readjust the INTENSITY and FOCUS controls for best readout and trace definition. k. Disconnect the Color Bar signal from the CH A INPUT. 44. Adjust Probe Compensation a. Set the VAC amplitude to 199.9 mV. Connect the VAC output signal through the 20 pF Input Normalizer to the 1780R-Series front-panel PROBE input connector. b.
Adjustment Procedures e. Adjust Probe Calibrator Amplitude (A6R795) to obtain a null on the test oscilloscope CRT display. f. Disconnect the test oscilloscope from the VAC and the 1X probe from the 1780R-Series CAL OUT connector. g. Connect a Pulse & Bar signal from a television test signal generator, through a 75 W feed-through terminator, to the 1780R-Series CH A INPUT connector. h. Select RIGHT DISPLAY WFM+CAL, INPUT-CH A, and WFM HORIZONTAL-TWO-LINE mode of operation.
Adjustment Procedures h. Disconnect the Pulse & Bar signal from the front-panel PROBE input connector. 47. Adjust Probe Frequency Response a. Connect the television test signal generator Multiburst signal, through a 75 W feed-through terminator, to the 1780R-Series front-panel PROBE input connector. b. Connect a 75 W end-line termination to the rear-panel PIX MON OUT connector. c. Select PROBE-X1 on PAGE 2 of the Configure menu. Check that DC RESTORER-OFF is selected on PAGE 1.
Adjustment Procedures o. Set the generator output frequency to 3.58 MHz (4.43 MHz for PAL), 5 MHz, 8 MHz, and then to 10 MHz. p. Check that the displayed amplitude on the Waveform CRT is within ±3% or ±21.4 mV for NTSC (±21.0 mV for PAL) of the amplitude noted in part l. of this step for each frequency given in part o. q. Remove the 10X attenuator so that the signal is applied through the 50 W-to-75 W minimum loss attenuator and 75 W feed-through terminator to the PROBE input. r.
Adjustment Procedures 5–60 1780R-Series Service Manual
Preventive Maintenance Preventive maintenance consists of cleaning, visual inspection, performance checks, and (if needed) readjustment. The preventive maintenance schedule established for the instrument should be based on the amount of use it receives and the environment in which it is operated. Under average conditions, scheduled preventive maintenance should be performed every 2000 hours of operation.
Preventive Maintenance The instrument should be cleaned often enough to prevent dust and dirt from accumulating. Dirt acts as a thermal insulator, preventing effective heat dissipation, and can also provide high-resistance electrical leakage paths between conductors or components in a humid environment. CAUTION. Do not allow water to get inside any enclosed assembly or component.
Static-Sensitive Components This instrument contains electrical components that are susceptible to damage from static discharge. Static voltages from 1 kV to 30 kV are common in unprotected environments. Table 6–1 shows the relative static discharge susceptibility of various semiconductor classes.
Static-Sensitive Components 7. Do not slide components over any surface. 8. Avoid handling components in areas that have a floor or work surface covering capable of generating a static charge. 9. Use a soldering iron that is connected to earth ground. 10. Use only wick-type or special anti-static suction desoldering tools.
Corrective Maintenance CAUTION. A 2% RMA flux content solder is recommended for making repairs in this instrument. Cleaning of rosin residue is not recommended. Most cleaning solvents tend to reactivate the rosin and spread it under components where it may cause corrosion under humid conditions. The rosin residue, if left alone, does not exhibit these corrosive properties. NOTE. No repair should be attempted during the warranty period.
Corrective Maintenance Mechanical Disassembly/Assembly Use these instructions for disassembly and then reverse them for reassembly, unless noted otherwise. The Inner Bezel Frame Removal and Graticule Light Removal procedures can be performed with the instrument installed in the rack mounting cabinet or portable case. Before attempting any disassembly/assembly of the instrument, be sure to disconnect the power cord. NOTE.
Corrective Maintenance Graticule Light Removal Use the following procedure to replace the graticule lights. 1. Remove the SCALE, FOCUS, INTENSITY, VERT POS, and HORIZ POS knobs by loosening their set screws. 2. Use pliers to grip the CRT Panel protrusion where the SCALE control shaft is located. Carefully pull the panel outward until it pops out. (This panel is a strip measuring 1-1/16-inch wide and 12-1/4 inches long. It is located below the CRTs; see Figure 6–1.) 3.
Corrective Maintenance Instrument Removal from Rack Mounting Cabinet or Portable Case Use the following procedure to remove the instrument from the cabinet or case. 1. Check that the power cord is disconnected. Disconnect all the coaxial cables from the rear-panel BNC connectors. 2. Remove the instrument from the rack mounting cabinet or from its portable case. (Four 10–32 screws secure the instrument to the cabinet or portable case. See Figure 2–8.
Corrective Maintenance Figure 6–2: Positions of the waveform CRT deflection leads 6. For the CRT being removed: Disconnect the appropriate Trace Rotation connector from the Interconnect board (A11). For the waveform CRT, the connector is J165; for the vectorscope CRT, the connector is J143 on A11. WARNING. The CRT may retain a dangerous charge. Ground the conductor of the anode to discharge the CRT. Do not allow the conductor to touch your body or any circuitry. 7.
Corrective Maintenance CRT Replacement Use the following procedure to replace the CRT. 1. Slide the CRT partially into position so the CRT base pins will align with the socket. Push the socket into position onto the CRT pins. CAUTION. Avoid bending the CRT base pins when pushing the CRT into the socket. Do not pinch wires between the CRT and the socket. 2. Check that the four cushions are properly positioned in the corners of the bezel opening.
Corrective Maintenance 6. Clean the face of the CRT to remove fingerprints. 7. Reconnect the PROBE connector to J498 on the Vectorscope board (A6). Install the parts removed in steps 1 through 4 of the CRT Removal procedure. Reconnect the ribbon cable connector to J138 on the MPU Annex board (A10). Removing the Input & BNC Board Use the following procedure to remove the Input & BNC board. 1. Remove the two screws that hold the metal shield to the chassis (see Figure 6–3). 2.
Corrective Maintenance Removing the Waveform HV Supply Board Use the following procedure to remove the Waveform HV Supply board. 1. Remove the two screws that hold the clear plastic cover in position. 2. Remove the two 1/4-inch hex-shaped posts. WARNING. The CRT may retain a dangerous charge. Ground the anode lead conductor to discharge the CRT. Do not allow the conductor to touch your body or any circuitry. 3.
Corrective Maintenance Removing the LV Power Supply Board Use the following procedure to remove the LV Power Supply board. 1. Remove the MPU Annex (A10), Waveform HV Supply (A16), and the Fuse (A17) boards using the procedures given previously. 2. Remove the screws and one nut that hold the large and small metal shields in place. The nut is located on the small shield. These shields cover the LV Power Supply board and are used to hold the boards listed in step 1. 3.
Corrective Maintenance 7. To re-assemble, reverse the procedure. Removing the Oscillator Board Use the following procedure to remove the Oscillator board. 1. Unsolder the ground and center conductor wires from the EXT CW REF rear-panel BNC connector. 2. Unplug the coaxial cable connector from J499 on the Oscillator board (A7). 3. Remove two screws that hold the lower (tabs) edges of the board to the chassis. 4. Disconnect the ribbon cable connector from J115 on the board. 5.
Troubleshooting Since this manual is a troubleshooting aid, its organization is described here. This material is general, and does not cover specific cases. Troubleshooting Aids Foldout Pages The foldout pages at the back of the manual contain block and schematic diagrams, circuit board illustrations, and look-up charts. See Figure 6–4. Figure 6–4: Using foldout pages Diagrams. Schematic diagrams show the circuit number and electrical value of each component.
Troubleshooting Look Up Charts. Each schematic diagram is assigned an alpha-numeric grid and a look-up chart which lists the grid location of components on that schematic. Circuit Board Illustrations. Electrical components, connectors, and test points are identified on circuit board illustrations, which are located on the back of the schematic diagrams. Circuit boards are grid numbered, with the lowest number in the upper left corner and the highest number in the lower right.
Troubleshooting Assembly and Circuit Numbering. All circuit board assemblies are assigned assembly or “A” numbers. Table 6–3 and Figure 6–5 show the assembly numbers and their locations for this instrument. NOTE. Always check the parts list for part numbers and descriptions when ordering replacement parts. Some parts may have been replaced or have a different value in an individual instrument.
Troubleshooting Figure 6–5: 1780R-Series circuit board assembly locations 6–18 1780R-Series Service Manual
Troubleshooting General Troubleshooting Techniques 1. Be sure the instrument is malfunctioning. See Section 2 to determine whether the instrument is operating properly. Check the operation of front-panel controls, associated equipment, and input signal connections. CAUTION. Use extreme care when probing with meter leads or probes, because of the high component density and limited access within the instrument.
Troubleshooting 6–20 1780R-Series Service Manual
Troubleshooting Procedures Board Accessibility Servicing some circuit assemblies in this instrument requires removal of other components (shields, cables, circuit boards, etc.). Some procedures call out special equipment such as cable extenders or external power supplies. The following information details the procedures for accessing/troubleshooting these circuit assemblies.
Troubleshooting Procedures WARNING. Dangerous potentials exist on the LV Power Supply board. Use care when troubleshooting to prevent personal injury. Read the instructions given in the Troubleshooting portion of this section. Power Supply The 1780R-Series power supply presents special troubleshooting problems, if a fault occurs. Besides having a sizeable area where dangerous potentials can be contacted, the type of circuitry employed can not be troubleshot by conventional means. WARNING.
Troubleshooting Procedures Equipment Required List Procedure DC Power Supply: Variable voltage supply, 0–20 V DC at 1A. For example: A TEKTRONIX PS 503A Power Supply. (Requires a TM500-Series mainframe.) Isolation Transformer: For example: Stancor GIS 1000. Test Oscilloscope: See Equipment Required List for the Performance Verification or Adjustment Procedures. 5 V Supply Load Resistor: 47 W, 1W resistor. A Resistive Dummy Load: See Step 18 for resistance values. 1.
Troubleshooting Procedures 5. Slowly increase DC power supply voltage. At about 16 V U460 turns on and the base of the Switcher (Q250) has a waveform with a 90% duty cycle, 5 V peak-to-peak amplitude (+1 V to –4 V), and a 20 ms period. 6. Slowly decrease the DC power supply voltage. At approximately 12 to 13 V the Switcher base drive waveform is disabled. 7. Turn POWER switch on and then off. Check to see if switcher waveform enables then disables. 8. Remove P600 from J600 (main power distribution plug).
Troubleshooting Procedures 13. Set the Variac to 40 V. Adjust the external DC supply for 18 V. 14. Use the test oscilloscope to check the waveform on the base of Q460 has approximately 20% duty cycle and a period of about 4 ms. 15. Connect the test oscilloscope probe to the anode of CR140 and check for an approximate 150 V signal; voltage snubber working. 16. Move the probe to the collector of Q250 and check for a waveform. 17.
Troubleshooting Procedures D. E. U460 pin 3 U460 pin 4 23. Connect the test oscilloscope probe to the emitter of Q250. With the variac set to 110 V, temporarily short the +5 V supply to ground, and check that the voltage on Q250 does not rise above 1.7 V. Power supply should operate in short bursts and then shut down. CAUTION. Power supply must be connected to the external resistive load. Integrated circuits powered from the +5 V supply will be damaged by this test.
Troubleshooting Procedures Figure 6–8: A. Q250 collector waveform. B. Q250 base waveform. C. Q350–Q451 emitter waveform. D. U460 pin 3 waveform. E. U460 pin 4 waveform 24. Install a plug jumper on J122. Connect the test oscilloscope probe to the +5 V supply. Supply should turn on in short bursts and not increase beyond +6.5 V. See Figure 6–9.
Troubleshooting Procedures Figure 6–9: +5 V supply output waveform when over voltage protection is operating Current Limit Adjustment (A1R466) Equipment Required List Variable Auto Transformer: See Equipment Required List in the Adjustment Procedures section. Television Test Signal Genera- Color Bars. See Adjustment Procedures. tor (Optional): 75 W Feed-Through Terminator. See Adjustment Procedures. 75 W Coaxial Cable. See Adjustment Procedures.
Troubleshooting Procedures 4. Set the 1780R-Series instrument POWER switch to ON. 5. Set the 1780R-Series front-panel controls for best viewing of the color bar vectors on the Vectorscope CRT and of the waveform displayed on the Waveform CRT. Turn the SCALE control to obtain the highest level of illumination for both CRT graticules. 6. Set the autotransformer to low line (90 V for 115 VAC operation; 180 V for 230 VAC operation). 7. Set the 1780R-Series POWER switch to OFF (STANDBY).
Troubleshooting Procedures Touch Panel Sensitivity Adjustment (A9R292) Equipment Required List Procedure Test Oscilloscope: See Equipment Required List for the Performance Verification or Adjustment Procedures. 1. Check that the 1780R-Series instrument POWER switch is set to OFF (STANDBY). 2. Remove the CRT Panel and CRT Frame Outer Bezel by using the Graticule Light Removal procedure as a guide. Disconnect the PROBE wire where it pugs into the PROBE BNC connector. 3.
Options CRT Options The standard instrument is shipped with a P31 (green) phosphor CRTs installed. If Option 74 is ordered, the instrument is shipped with P4 (white) phosphor CRTs installed. The Option 74 CRT part numbers are given at the end of the Replaceable Electrical Parts List. Power Cord Options Any of the following power cord options can be ordered for the 1780R-Series. If no power cord option is ordered, instruments are shipped with a North American 125 V power cord and one replacement fuse.
Options 7–2 1780R-Series Service Manual
Replaceable Electrical Parts This section contains a list of the electrical components for the . Use this list to identify and order replacement parts. Parts Ordering Information Replacement parts are available through your local Tektronix field office or representative. Changes to Tektronix products are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest improvements.
Replaceable Electrical Parts Parts list column descriptions Column Column name Description 1 Component number The component number appears on diagrams and circuit board illustrations, located in the diagrams section. Assembly numbers are clearly marked on each diagram and circuit board illustration in the Diagrams section, and on the mechanical exploded views in the Replaceable Mechanical Parts list section.
Replaceable Electrical Parts Manufacturers cross index Mfr. code Manufacturer Address City, state, zip code 00779 AMP INC. CUSTOMER SERVICE DEPT PO BOX 3608 HARRISBURG, PA 17105–3608 01295 TEXAS INSTRUMENTS INC SEMICONDUCTOR GROUP 13500 N CENTRAL EXPRESSWAY PO BOX 655303 DALLAS, TX 75272–5303 01884 DEARBORN ELECTRONICS INC 1221 NORTH HIGHWAY 17/92 LONGWOOD, FL 32750 02111 SPECTROL ELECTRONICS CORP 4051 GREYSTONE DRIVE ONTARIO, CA 91761 02113 COILCRAFT, INC. 1102 SILVER LAKE RD.
Replaceable Electrical Parts Manufacturers cross index (cont.) Mfr. code Manufacturer Address City, state, zip code 12954 MICROSEMI CORP – SCOTTSDALE 8700 E THOMAS ROAD PO BOX 1390 SCOTTSDALE, AZ 85252–5252 12969 MICROSEMI CORP WATERTOWN DIVISION 530 PLEASANT STREET WATERTWON, MA 02172 13103 THERMALLOY INC 2021 W.
Replaceable Electrical Parts Manufacturers cross index (cont.) Mfr.
Replaceable Electrical Parts Manufacturers cross index (cont.) Mfr.
Replaceable Electrical Parts Manufacturers cross index (cont.) Mfr.
Replaceable Electrical Parts Replaceable electrical parts list Component number Tektronix part number A1 671–0460–12 A2 671–0467–18 A2 671–0467–19 A2 671–0988–18 A2 671–0988–19 A3 671–0459–05 A4 671–0461–02 A4 671–0461–03 A5 671–0466–12 A5 671–0466–13 A6 Serial no. effective Serial no. discont’d B030472 B030473 B030472 B030473 B030399 B030400 B030488 Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A1 671–0460–12 CIRCUIT BD ASSY:LOW VOLTAGE 80009 671–0460–12 A1C100 290–1302–00 CAP,FXD,ALUM:1000UF,20%,35V,12.5 X 30MM (0.492 X 1.180),RADIAL,LOWIMP,1.95A RIPPLE 62643 CEEFM1V102M7 A1C120 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V,Z5U 04222 SA105E104MAA A1C121 281–0775–01 CAP,FXD,CERAMIC:MCL,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A1C462 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V,Z5U 04222 SA105E104MAA A1C463 281–0823–00 CAP,FXD,CER DI:470PF,10%,50V TUBULAR,MI 04222 SA101A471KAA A1C540 290–1314–00 CAP,FXD,ALUM:330UF,20%,63V,ESR=0.049 OHM(100KHZ,20C),12.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A1L420 108–1520–00 INDUCTOR,FXD:POWER,47UH,10%,I<1.5A,RDC<0.056 OHM,Q>20,SRF>5.8MHZ,FERRITE BOBBIN,TSL112RA–470K TK2058 TSL1110–470K1R5 A1L420 108–1520–00 INDUCTOR,FXD:POWER,47UH,10%,I<1.5A,RDC<0.056 OHM,Q>20,SRF>5.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A1Q360 151–0188–00 TRANSISTOR,SIG:BIPOLAR,PNP,40V,200MA,250MHZ, AMPLIFIER,2N3906,TO–92 EBC 04713 2N3906 A1Q450 151–0476–00 TRANSISTOR,PWR:BIPOLAR,NPN,100V,3.0A,3.0MHZ, AMPLIFIER,TIP31C,TO–220 04713 TIP31C *MOUNTING PARTS* 211–0097–00 SCREW,MACHINE:4–40 X 0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A1R223 322–3001–00 RES,FXD,FILM:10 OHM,1%,0.2W 57668 CRB20T68EFX10R0 A1R224 322–3097–00 RES,FXD,FILM:100 OHM,1%,0.2W 57668 CRB20T68EFX1000 A1R230 322–3269–00 RES,FXD,FILM:6.19K OHM,1%,0.2W 91637 CCF50–6191F–R36 A1R232 322–3193–00 RES,FXD:METAL FILM,1K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A1S250 260–2485–00 SWITCH,THRMSTC:SPST,NC,OPEN 80.0 DEGREES C,CL 69.4 DEGREES C,15A,120VAC 14604 2450–400–8 A1T130 120–1532–00 TRANSFORMER,RF:TOROID,ISOLATION,RATIO 1:1,IND 100–300 UH, DCR 1.5 OHM POTTED, PKG 0.8 X 0.65,0. 24226 51–446 A1T430 120–1764–00 TRANSFORMER,PWR:SWITCHING, 40.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A1W520 131–0566–00 BUS,CONDUCTOR:DUMMY RES,0.094 OD X 0.225 L W/WIRE LEADS 57668 TPW 02–000 A1W540 131–0566–00 BUS,CONDUCTOR:DUMMY RES,0.094 OD X 0.225 L W/WIRE LEADS 57668 TPW 02–000 8–16 Serial no. effective Serial no.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number A2 671–0467–18 A2 671–0467–19 A2 671–0988–18 A2 671–0988–19 Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A2C414 281–0775–01 CAP,FXD,CERAMIC:MCL,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A2C651 283–0189–00 CAP,FXD,CER DI:0.1UF,20%,400V SQUARE 04222 SR508C104MAA A2C660 290–0974–00 CAP,FXD,ALUM:10UF,20%,50V 55680 UVX1H100MDA A2C661 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V 04222 SA105E104MAA A2C670 281–0775–01 CAP,FXD,CERAMIC:MCL,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A2C842 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V 04222 SA105E104MAA A2C844 281–0791–00 CAP,FXD,CERAMIC:MLC,270PF,10%,100V 04222 SA102C271KAA A2C845 281–0777–00 CAP,FXD,CERAMIC:MLC,51PF,5%,200V 04222 SA102A510JAA A2C848 283–0636–01 CAP,FXDCA DI:36PF,1.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A2C1011 281–0765–00 CAP,FXD,CER DI:100PF,5%,100V TUBULAR 04222 SA102A101JAA A2C1016 281–0775–01 CAP,FXD,CERAMIC:MCL,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A2C1160 281–0759–00 CAP,FXD,CERAMIC:MLC,22PF,10%,100V 04222 SA102A220KAA A2C1171 281–0767–00 CAP,FXD,CERAMIC:MLC,330PF,20%,100V 04222 SA102C331MAA A2C1179 281–0863–00 CAP,FXD,CERAMIC:MLC,240PF,5%,100V 04222 SA101A241JAA A2C1194 281–0302–00 CAP,VAR,PLASTIC:1.2–4PF,100V 52769 GXL4R000 A2C1195 281–0775–01 CAP,FXD,CERAMIC:MCL,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A2CR1142 152–0066–00 DIODE,RECT:400V,1A,IFSM=30A,1.2VF, 2US,GP10G/1N5060 0LUA3 1N5060 A2CR1150 152–0066–00 DIODE,RECT:400V,1A,IFSM=30A,1.2VF, 2US,GP10G/1N5060 0LUA3 1N5060 A2CR1151 152–0066–00 DIODE,RECT:400V,1A,IFSM=30A,1.2VF, 2US,GP10G/1N5060 0LUA3 1N5060 A2CR1154 152–0322–00 DIODE,SIG:SCHOTTKY,15V,0.41V VF AT 1.0MA,1.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A2CR1597 152–0141–02 DIODE,SIG:ULTRA FAST,40V,150MA,4NS,2PF,1N4152 01295 1N4152R A2J1 131–0106–00 CONN,RF JACK:BNC,FEMALE,STR,SLDR CUP/FRONT PNL,0.472 MLG X 0.590 TAIL,0.328 L 0.375–32 THD,D 24931 28JR158–1 A2J2 131–0106–00 CONN,RF JACK:BNC,FEMALE,STR,SLDR CUP/FRONT PNL,0.472 MLG X 0.590 TAIL,0.328 L 0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A2J1203 131–4752–00 CONN,HDR::PCB,MALE,45 DEG,1 X 2,0.1 CTR,0.240 MLG X 0.110 TAIL,30 GOLD, 58050 082–0243–AS10 A2J1231 131–4752–00 CONN,HDR::PCB,MALE,45 DEG,1 X 2,0.1 CTR,0.240 MLG X 0.110 TAIL,30 GOLD, 58050 082–0243–AS10 A2J1322 131–4752–00 CONN,HDR::PCB,MALE,45 DEG,1 X 2,0.1 CTR,0.240 MLG X 0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A2L1350 108–0317–00 INDUCTOR,FXD:CUSTOM,POWER,15UH,10%,IDC<460 MA,RDC<1.2 OHM,Q>55@2.5MHZ,SRF>30 MHZ,POWDERED IRO 0JR03 108–0317–00 A2L1374 108–1212–00 INDUCTOR,FXD:CUSTOM,SIGNAL,9UH,2%,IDC<300 MA,RDC<1.6 OHM,Q>60@4MHZ,SRF>50 MHZ 0JR03 108–1212–00 A2P192 131–0993–00 CONN,BOX:SHUNT,FEMALE,STR,1 X 2,0.1 CTR,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A2R281 322–3318–00 RES,FXD,FILM:METAL FILM,20K OHM,1%,0.2W 57668 CRB20T68EFX2002 A2R282 322–3318–00 RES,FXD,FILM:METAL FILM,20K OHM,1%,0.2W 57668 CRB20T68EFX2002 A2R283 322–3318–00 RES,FXD,FILM:METAL FILM,20K OHM,1%,0.2W 57668 CRB20T68EFX2002 A2R285 315–0136–01 RES,FXD,FILM:13M OHM,5%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A2R374 322–3487–00 RES,FXD,FILM:500 OHM,1%,0.2W,TC=TO 57668 RB20 FXE 499E A2R375 322–3487–00 RES,FXD,FILM:500 OHM,1%,0.2W,TC=TO 57668 RB20 FXE 499E A2R376 322–3487–00 RES,FXD,FILM:500 OHM,1%,0.2W,TC=TO 57668 RB20 FXE 499E A2R377 322–3258–00 RES,FXD:METAL FILM,4.75K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A2R425 322–3114–00 RES,FXD,FILM:150 OHM,1%,0.2W 57668 CRB20–FX–150E A2R428 322–3252–00 RES,FXD,FILM:4.12K OHM,1%,0.2W,TC=T0 57668 CRB20 FXE 4K12 A2R431 322–3077–00 RES,FXD,FILM:61.9 OHM,1%,0.2W,TC=T0, 57668 CRB20 FXE 61E9 A2R433 322–3097–00 RES,FXD,FILM:100 OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A2R487 322–3300–00 RES,FXD,FILM:13K OHM,1%,0.2W,TC=T0 (1780R ONLY) 80009 322–3300–00 A2R487 322–3310–00 RES,FXD,FILM:16.5K OHM,1%,0.2W,TC=T0 (1781R ONLY) 57668 CRB20 FXE 16K5 A2R488 322–3226–00 RES,FXD:METAL FILM,2.21K OHM,1%,0.2W 57668 CRB20T68EFX2211 A2R489 322–3277–00 RES,FXD,FILM:7.5K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A2R536 311–2239–00 RES,VAR,TRMR:CERMET,100K OHM,20%,0.5W,0.197 SQ,TOP ADJUST,T&R TK2073 GF06UT2 104 M L20 A2R540 322–3328–00 RES,FXD,FILM:25.5K OHM,1%,0.2W,TC=T0 57668 CRB20 FXE 25K5 A2R543 303–0203–00 RES,FXD,CMPSN:20K OHM,5%,1W 24546 FP32 OR FP1 20 K OHM 5 PERCEN A2R547 322–3130–00 RES,FXD,FILM:221 OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective A2R610 322–3310–00 A2R611 322–3150–00 RES,FXD,FILM:357 OHM,1%,0.2W,TC=T0 57668 CRB20 FXE 357E A2R612 311–2234–00 RES,VAR,TRMR:CERMET,5K OHM,20%,0.5W,0.197 SQ,TOP ADJUST,T&R TK2073 GF06UT2 502 M L20 A2R613 322–3097–00 RES,FXD,FILM:100 OHM,1%,0.2W 57668 CRB20T68EFX1000 A2R615 322–3258–00 RES,FXD:METAL FILM,4.75K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A2R665 322–3254–00 RES,FXD,FILM:4.32K OHM,1%,0.2W,TC=T0 91637 CCF50–4321F–R36 A2R666 322–3164–00 RES,FXD,FILM:499 OHM,1%,0.2W,TC=T0 57668 CRB20T68EFX4990 A2R667 322–3300–00 RES,FXD,FILM:13K OHM,1%,0.2W,TC=T0 80009 322–3300–00 A2R668 322–3204–00 RES,FXD,FILM:1.3K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A2R727 322–3335–00 RES,FXD,FILM:30.1K OHM,1%,0.2W,TC=T0 57668 CRB20 FXE 30K1 A2R728 322–3411–00 RES,FXD,FILM:187K OHM,1%,0.2W,TC=T0 91637 CCF50–1873F–R36 A2R729 322–3222–07 RES,FXD,FILM:2K OHM,0.1%,0.2W TC=T9 91637 CCF501C20000B A2R730 322–3259–00 RES,FXD,FILM:4.87K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A2R818 322–3356–00 RES,FXD,FILM:49.9K OHM,1%,0.2W,TC=T0 57668 CRB20 FXE 49K9 A2R819 322–3356–00 RES,FXD,FILM:49.9K OHM,1%,0.2W,TC=T0 57668 CRB20 FXE 49K9 A2R820 322–3335–00 RES,FXD,FILM:30.1K OHM,1%,0.2W,TC=T0 57668 CRB20 FXE 30K1 A2R821 322–3411–00 RES,FXD,FILM:187K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A2R912 322–3485–07 RES,FXD,FILM:5K OHM,0.1%,0.2W,TC=T9 91637 CCF501C50000B A2R913 322–3485–07 RES,FXD,FILM:5K OHM,0.1%,0.2W,TC=T9 91637 CCF501C50000B A2R915 322–3335–00 RES,FXD,FILM:30.1K OHM,1%,0.2W,TC=T0 57668 CRB20 FXE 30K1 A2R916 322–3335–00 RES,FXD,FILM:30.1K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A2R985 322–3193–00 RES,FXD:METAL FILM,1K OHM,1%,0.2W 57668 CRB20T68EFX1001 A2R987 307–0730–00 RES NTWK,FXD,FI:7,47K OHM,2%,0.18W EA,BULK 11236 750–81–R47K A2R991 322–3193–00 RES,FXD:METAL FILM,1K OHM,1%,0.2W 57668 CRB20T68EFX1001 A2R992 322–3193–00 RES,FXD:METAL FILM,1K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A2R1037 322–3147–00 RES,FXD,FILM:332 OHM,1%,0.2W 57668 CRB20 FXE 332E A2R1038 322–3147–00 RES,FXD,FILM:332 OHM,1%,0.2W 57668 CRB20 FXE 332E A2R1039 322–3097–00 RES,FXD,FILM:100 OHM,1%,0.2W 57668 CRB20T68EFX1000 A2R1040 322–3034–00 RES,FXD,FILM:22.1 OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A2R1117 322–3226–00 RES,FXD:METAL FILM,2.21K OHM,1%,0.2W 57668 CRB20T68EFX2211 A2R1119 322–3193–07 RES,FXD,FILM:1K OHM,0.1%,0.2W,TC=T9 91637 CCF501C10000B A2R1122 322–3176–00 RES,FXD,FILM:665 OHM,1%,0.2W,TC=T0 91637 CCF50–6650F–R36 A2R1124 322–3172–00 RES,FXD,FILM:604 OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A2R1178 322–3306–00 RES,FXD:METAL FILM,15K OHM,1%,0.2W 57668 CRB20T68EFX1502 A2R1179 322–3097–00 RES,FXD,FILM:100 OHM,1%,0.2W 57668 CRB20T68EFX1000 A2R1185 322–3414–00 RES,FXD:METAL FILM,200K OHM,1%,0.2W 57668 CRB 20 FXE 200 K A2R1190 322–3154–00 RES,FXD:METAL FILM,392 OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A2R1252 322–3258–00 RES,FXD:METAL FILM,4.75K OHM,1%,0.2W 56845 CCF50–4751F–R36 A2R1253 322–3289–00 RES,FXD:METAL FILM,10K OHM,1%,0.2W 57668 CRB20T29EFX1002 A2R1254 322–3281–00 RES,FXD:METAL FILM,8.25K OHM,1%,0.2W 57668 CRB20 FXE 8K25 A2R1255 322–3289–00 RES,FXD:METAL FILM,10K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A2R1312 322–3243–00 RES,FXD:METAL FILM,3.32K OHM,1%,0.2W 91637 CCF50–3321F–R36 A2R1314 315–0755–00 RES,FXD,FILM:7.5M OHM,5%,0.25W MI 50139 CB7555 A2R1315 322–3277–00 RES,FXD,FILM:7.5K OHM,1%,0.2W,TC=T0 57668 CRB20 FXE 7K50 A2R1316 322–3314–00 RES,FXD:METAL FILM,18.2K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A2R1357 322–3385–00 RES,FXD:METAL FILM,100K OHM,1%,0.2W 57668 CRB20T29EFX1003 A2R1359 322–3126–00 RES,FXD,FILM:200 OHM,1%,0.2W,TC=T0 91637 CCF50–2000F–R36 A2R1360 322–3162–00 RES,FXD:METAL FILM,475 OHM,1%,0.2W 57668 CRB20T68EFX4750 A2R1361 322–3126–00 RES,FXD,FILM:200 OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A2R1417 322–3193–00 RES,FXD:METAL FILM,1K OHM,1%,0.2W 57668 CRB20T68EFX1001 A2R1420 322–3193–00 RES,FXD:METAL FILM,1K OHM,1%,0.2W 57668 CRB20T68EFX1001 A2R1421 322–3193–00 RES,FXD:METAL FILM,1K OHM,1%,0.2W 57668 CRB20T68EFX1001 A2R1422 322–3066–00 RES,FXD,FILM:47.5 OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A2R1476 322–3258–00 RES,FXD:METAL FILM,4.75K OHM,1%,0.2W 56845 CCF50–4751F–R36 A2R1477 322–3066–00 RES,FXD,FILM:47.5 OHM,1%,0.2W 09969 CCF50–47R5F–R36 A2R1480 322–3339–00 RES,FXD:METAL FILM,33.2K OHM,1%,0.2W 91637 CCF50–3322F–R36 A2R1481 322–3354–00 RES,FXD:METAL FILM,47.5K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A2R1578 322–3097–00 RES,FXD,FILM:100 OHM,1%,0.2W 57668 CRB20T68EFX1000 A2R1579 322–3285–00 RES,FXD,FILM:9.09K OHM,1%,0.2W,TC=T0 57668 CRB20 FXE 9K09 A2R1580 322–3097–00 RES,FXD,FILM:100 OHM,1%,0.2W 57668 CRB20T68EFX1000 A2R1581 322–3097–00 RES,FXD,FILM:100 OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A2TP1273 214–4085–00 TERM,TEST POINT:0.070 ID,0.220 H,0.063 DIA PCB,0.015 X 0.032 BRASS,W/ RED NYLON COLLAR 26364 TP104–01–02 A2TP1290 214–4085–00 TERM,TEST POINT:0.070 ID,0.220 H,0.063 DIA PCB,0.015 X 0.032 BRASS,W/ RED NYLON COLLAR 26364 TP104–01–02 A2TP1345 214–4085–00 TERM,TEST POINT:0.070 ID,0.220 H,0.063 DIA PCB,0.015 X 0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A2U565 156–2460–00 ICSC:BIPOLAR,MODULATOR/DEMODULATOR, BALANCED,MC1496P,DIP14.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A2U905 156–2584–00 IC,DIGITAL:HCMOS,FLIP FLOP,OCTAL D–TYPE,CLEAR,74HC273,DIP20.3,TUBE 01295 SN74HC273N A2U935 165–2243–00 MICROCKT,LINEAR:OP–AMP TK2601 165–2243–00 A2U958 156–0875–00 IC,DIGITAL:LSTTL,GATE,DUAL 2–WIDE,2–INPUT AND–OR–INVERT,74LS51,DIP14.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A2U1011 156–0259–00 IC,LINEAR:BIPOLAR,TRANSISTOR ARRAY,(5)NPN,INDEPENDENT,15V,100MA, 300MHZ,AMPLIFIER,CA3083,DI 0CVK3 ULN2083A A2U1019 156–1191–00 IC,LINEAR:BIFET,OP–AMP,DUAL, TL072CN/LF353N,DIP08.3 01295 TL072CP A2U1046 156–2817–00 IC,LINEAR:BIFET,OP–AMP,QUAD,MC34084P,DIP14.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A2U1270 156–1335–00 IC,DIGITAL:LSTTL,MULTIVIBRATOR,DUAL RETRIG MONOSTABLE,96LS02,DIP16.3 07263 DM96LS02N A2U1277 156–2460–00 ICSC:BIPOLAR,MODULATOR/DEMODULATOR,BALANC ED,MC1496P,DIP14.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A2VR462 152–0760–00 DIODE,ZENER:6.2V,2%,0.4W,1N753C FMLY/1N5995C,DO–7 OR DO–35 04713 1N5995C A2VR483 152–0241–00 DIODE,ZENER:33V,5%,0.4W,1N973B,DO–7 OR DO–35 04713 1N973BRL A2VR492 152–0461–00 DIODE,SIG:6.2V,5%,0.4W,1N821,DO–7 04713 1N821 A2VR578 152–0217–00 DIODE,ZENER:8.2V,5%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A3 671–0459–05 CIRCUIT BD ASSY:VECTOR HV 80009 671–0459–05 A3C100 290–1310–00 CAP,FXD,ALUM:10UF,20%,160V,ESR=24.9 OHM (120HZ,20C),LS=0.200 INCH,13X20MM,105C,5000HRS 62643 CEJSM2C100M A3C101 285–1341–00 CAP,FXD,PLASTIC:METALIZED FILM,0.1UF,20%,100V,POLY TK1913 MKS2 0.1/100/20 A3C102 285–1341–00 CAP,FXD,PLASTIC:METALIZED FILM,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A3C460 283–0084–00 CAP,FXD,CER DI:270PF,5%,1000V DISC 59660 838 533 X5FO 2715 A3C480 283–0057–00 CAP,FXD,CER DI:0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A3L111 108–1262–00 INDUCTOR,FXD:POWER,100UH,10%,I<0.75A,RDC<0.23 OHM,Q>15,SRF>5.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A3R180 315–0511–02 RES,FXD,FILM:510 OHM,.25W,5% 50139 CB5115 ALLEN BRADLEY ONLY A3R181 301–0225–02 RES,FXD,FILM:2.2M OHM,5%,0.5W 50139 EB2255 A3R182 311–1256–00 RES,VAR,TRMR:CERMET,2.5M OHM,10%,0.5W,0.375 SQ,TOP ADJUST,BULK 02111 63M–255–T604 A3R183 303–0155–00 RES,FXD,FILM:1.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A3R460 315–0102–03 RES,FXD,FILM:1K OHM,5%,0.25W 50139 CB1025 (CARD PACK ONLY) A3R461 315–0470–03 RES,FXD,FILM:47 OHM,5%,0.25W 50139 CB4705 A3R462 315–0511–02 RES,FXD,FILM:510 OHM,.25W,5% 50139 CB5115 ALLEN BRADLEY ONLY A3R470 315–0103–00 RES,FXD,FILM:10K OHM,5%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number A4 671–0461–02 Serial no. effective B030400 Serial no. discont’d Name & description Mfr. code Mfr. part number B030399 CIRCUIT BD ASSY:ZAXIS 80009 671–0461–02 A4 671–0461–03 CIRCUIT BD ASSY:ZAXIS 80009 671–0461–03 A4C100 283–0770–01 CAP,FXDCA DI:300PF,1%,500V 09023 CDA15FD301F03 A4C101 283–0789–00 CAP,FXDCA DI:600PF,1%,300V,0.41 X 0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A4C598 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V 04222 SA105E104MAA A4CR204 152–0141–02 DIODE,SIG:ULTRA FAST,40V,150MA,4NS,2PF,1N4152,DO–35 01295 1N4152R A4CR214 152–0269–01 DIODE,SIG:VVC,C4=33PF,5%,C4/C20=2, SMV1263–1,DO–7 04713 SMV1263–1 A4CR296 152–0061–00 DIODE,SIG:200V,0.1A,700NS,4.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A4L115 114–0438–00 INDUCTOR,VAR:SHIELDED,0.70–0.94UH,Q>65@L=65 (2.5MHZ),SLOT TEN–3–01,VERT MOUNT 02113 SLOT TEN–3–01 A4L261 108–1262–00 INDUCTOR,FXD:POWER,100UH,10%,I<0.75A,RDC<0.23 OHM,Q>15,SRF>5.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A4R293 322–3308–00 RES,FXD,FILM:15.8K OHM,1%,0.2W,TC=T0 57668 CRB20T68EFX1582 A4R294 322–3164–00 RES,FXD,FILM:499 OHM,1%,0.2W,TC=T0 57668 CRB20T68EFX4990 A4R296 315–0363–00 RES,FXD,FILM:36K OHM,5%,0.25W 50139 CB3635 A4R298 322–3069–00 RES,FXD,FILM:51.1 OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A4R397 322–3261–00 RES,FXD,FILM:5.11K OHM,1%,0.2W,TC=T0 91637 CCF50–5111F–R36 A4R398 322–3222–00 RES,FXD:METAL FILM,2K OHM,1%,0.2W,TC=100 PPM 57668 CRB20T68EFX2001 A4R399 322–3162–00 RES,FXD:METAL FILM,475 OHM,1%,0.2W,TC=100 PPM 57668 CRB20T68EFX4750 A4R407 322–3289–00 RES,FXD:METAL FILM,10K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A4R483 322–3308–00 RES,FXD,FILM:15.8K OHM,1%,0.2W,TC=T0 57668 CRB20T68EFX1582 A4R484 322–3238–00 RES,FXD,FILM:2.94K OHM,1%,0.2W,TC=T0 57668 CRB20 FXE 2K94 A4R485 322–3269–02 RES,FXD,FILM:6.19K OHM,0.2W,5% 57668 CRB DYE 6K19 A4R487 322–3308–00 RES,FXD,FILM:15.8K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A4U167 156–2558–00 IC,LINEAR:BIPOLAR,VOLTAGE REGULATOR, POSITIVE,12V,1.5A,2%,MC7812ACT,TO–220 01295 TL780–12CKC A4U202 156–0381–00 IC,DIGITAL:LSTTL,GATE,QUAD 2–INPUT XOR,74LS86,DIP14.3,TUBE 01295 SN74LS86AN A4U207 156–1324–00 IC,LINEAR:BIPOLAR,COMPARATOR,TTL,20NS,COMPL EMENTARY OUTPUT,W/STROBES,LM361N,DIP14.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A4U346 156–0513–03 ICSC:CMOS,ANALOG MUX,8 CHANNEL,4051B,DIP16.3,TUBE 04713 MC14051BCP A4U348 156–0513–03 ICSC:CMOS,ANALOG MUX,8 CHANNEL,4051B,DIP16.3,TUBE 04713 MC14051BCP A4U355 156–1200–00 IC,LINEAR:BIFET,OP–AMP,QUAD, TL074CN/LF347N/MC34004P,DIP14.
Replaceable Electrical Parts 8–78 1780R-Series Service Manual
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number A5 671–0466–12 Serial no. effective B030489 Serial no. discont’d Name & description Mfr. code Mfr. part number B030488 CIRCUIT BD ASSY:MICROPROCESSOR 80009 671–0466–12 A5 671–0466–13 CIRCUIT BD ASSY:MICROPROCESSOR 80009 671–0466–13 A5C105 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V 04222 SA105E104MAA A5C117 281–0775–01 CAP,FXD,CERAMIC:MCL,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A5C335 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V 04222 SA105E104MAA A5C336 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V 04222 SA105E104MAA A5C342 281–0775–01 CAP,FXD,CERAMIC:MCL,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A5C572 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V 04222 SA105E104MAA A5C592 290–0776–00 CAP,FXD,ALUM:22UF,20%,10V,ESR=15.07 OHM (120HZ,20C),RADIAL 62643 CEUSM1A220 A5C593 290–0776–00 CAP,FXD,ALUM:22UF,20%,10V,ESR=15.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A5J515 131–3277–00 CONN,HDR:PCB,MALE,STR,2 X 30,0.1 CTR,0.365 H X 0.105 TAIL,SHRD/4 SIDES,CTR PLZ,30 GOLD 22526 66506–057 A5J595 131–6028–00 CONN,DSUB:PCB,FEMALE,RTANG,9 POS,0.112 CTR, 0.375 MLG X 0.125 TAIL,4–40 THD INSERT,BD RETE 00779 869522-5 A5P453 131–0993–00 CONN,BOX:SHUNT,FEMALE,STR,1 X 2,0.1 CTR,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A5R315 322–3385–00 RES,FXD:METAL FILM,100K OHM,1%,0.2W 57668 CRB20T29EFX1003 A5R355 307–0446–00 RES NTWK,FXD,FI:(9) RES,10K OHM,20% 11236 750–101–R10K A5R360 307–0446–00 RES NTWK,FXD,FI:(9) RES,10K OHM,20% 11236 750–101–R10K A5R361 322–3051–00 RES,FXD,METAL:33.2 OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective A5R492 322–3130–00 A5R492 322–3101–00 RES,FXD,FILM:110 OHM,1%,0.2W 57668 CRB20T68 EFX1100 A5R502 322–3066–00 RES,FXD,FILM:47.5 OHM,1%,0.2W 09969 CCF50–47R5F–R36 A5R503 322–3066–00 RES,FXD,FILM:47.5 OHM,1%,0.2W 09969 CCF50–47R5F–R36 A5R504 322–3066–00 RES,FXD,FILM:47.5 OHM,1%,0.2W 09969 CCF50–47R5F–R36 A5R505 322–3066–00 RES,FXD,FILM:47.5 OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number 98291 DIPS20PIT *MOUNTING PARTS* 136–0752–00 SOCKET,DIP:PCB,FEMALE,STR,2 X 10,0.3 CTR,0.210 H X 0.128 TAIL,TIN,PHOS BRONZE A5U135 156–2111–00 IC,DIGITAL:ALSTTL,LATCH,OCTAL D–TYPE,3–STATE,74ALS373A,DIP20.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number 98291 DIPS20PIT 80009 160–6016–00 98291 DIPS20PIT 80009 160–6016–00 98291 DIPS20PIT *MOUNTING PARTS* 136–0752–00 SOCKET,DIP:PCB,FEMALE,STR,2 X 10,0.3 CTR,0.210 H X 0.128 TAIL,TIN,PHOS BRONZE 160–6016–00 IC,DIGITAL:CMOS,PLD,EEPLD,16V8,25NS, 90MA,PRGM 156–2983–00,16V8–25,DIP20.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number *END MOUNTING PARTS* A5U330 156–3669–00 IC,PROCESSOR:NMOS,PERIPHL,DUART,2681,DIP24.4 1CH66 SCN2681AC1N24 A5U340 156–5701–00 IC,PROCESSOR:CMOS,MICROPROCESSOR,16–BIT,10 MHZ,32CG16,PLCC68,TUBE 27014 NS32CG16V–10E 00779 3–821574–1 *MOUNTING PARTS* 136–0871–00 SOCKET,PLCC::PCB,68 POS,0.05 CTR,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A5U384 156–2096–00 IC,DIGITAL:ALSTTL,FLIP FLOP,QUAD D–TYPE,CLEAR,74ALS175,DIP16.3,TUBE 01295 SN74ALS175N A5U385 156–2357–00 IC,DIGITAL:HCTCMOS,FLIP FLOP,OCTAL D–TYPE, FLOW THRU,3–STATE,74HCT574,DIP20.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A5U548 156–1312–00 IC,MISC:BIPOLAR,SAMPLE/HOLD,LOW DROOP RATE,SMP–11,DIP14.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A6C218 281–0000–00 TEST SELECTABLE COMPONENT 80009 281–0000–00 A6C221 283–0665–00 CAP,FXD,MICA DI:190PF,1%,100V 09023 CD15FD191F03 A6C225 283–0634–01 CAP,FXD,MICA DI:65PF,1%,500V 09023 CDA15ED650F03 A6C238 281–0773–00 CAP,FXD,CERAMIC:MLC,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A6C383 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V,Z5U 04222 SA105E104MAA A6C391 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V,Z5U 04222 SA105E104MAA A6C392 281–0893–00 CAP,FXD,CERAMIC:MLC,4.7PF,+/–0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A6C554 281–0797–00 CAP,FXD,CERAMIC:MLC,15PF,5%,100V,SAFETY 12969 CGB150KFN A6C555 281–0773–00 CAP,FXD,CERAMIC:MLC,0.01UF,10%,100V,SAFETY 04222 SA101C103KAA A6C562 281–0775–01 CAP,FXD,CERAMIC:MCL,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A6C747 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V,Z5U 04222 SA105E104MAA A6C753 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V,Z5U 04222 SA105E104MAA A6C756 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V,Z5U 04222 SA105E104MAA A6C758 281–0775–01 CAP,FXD,CERAMIC:MCL,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A6CR672 152–0066–00 DIODE,RECT:400V,1A,IFSM=30A,1.2VF,2US,GP10G/1N5 060 0LUA3 1N5060 A6CR860 152–0066–00 DIODE,RECT:400V,1A,IFSM=30A,1.2VF,2US,GP10G/1N5 060,T&R, 0LUA3 1N5060 A6CR861 152–0066–00 DIODE,RECT:400V,1A,IFSM=30A,1.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A6R157 322–3164–00 RES,FXD,FILM:499 OHM,1%,0.2W 57668 CRB20T68EFX4990 A6R158 322–3164–00 RES,FXD,FILM:499 OHM,1%,0.2W 57668 CRB20T68EFX4990 A6R159 322–3260–00 RES,FXD,FILM:4.99K OHM,1%,0.2W 57668 CRB20T68EFX4991 A6R160 322–3181–00 RES,FXD,FILM:750 OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A6R234 322–3164–00 RES,FXD,FILM:499 OHM,1%,0.2W 57668 CRB20T68EFX4990 A6R235 322–3289–00 RES,FXD:METAL FILM,10K OHM,1%,0.2W 57668 CRB20T29EFX1002 A6R237 322–3172–00 RES,FXD,FILM:604 OHM,1%,0.2W 57668 CRB20 FXE 604E A6R238 322–3281–00 RES,FXD:METAL FILM,8.25K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A6R296 322–3226–00 RES,FXD:METAL FILM,2.21K OHM,1%,0.2W 57668 CRB20T68EFX2211 A6R297 322–3210–00 RES,FXD:METAL FILM,1.5K OHM,1%,0.2W 57668 CRB20 FXE 1K50 A6R298 322–3226–00 RES,FXD:METAL FILM,2.21K OHM,1%,0.2W 57668 CRB20T68EFX2211 A6R304 322–3222–00 RES,FXD:METAL FILM,2K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A6R368 322–3097–00 RES,FXD,FILM:100 OHM,1%,0.2W 57668 CRB20T68EFX1000 A6R369 311–2230–00 RES,VAR,TRMR:CERMET,500 OHM,20%,0.5W,0.197 SQ,TOP ADJUST,T&R TK2073 GF06UT2 501 M L20 A6R370 311–2232–00 RES,VAR,TRMR:CERMET,2K OHM,20%,0.5W,0.197 SQ,TOP ADJUST,T&R 30983 ORDER BY DESCRIPTION A6R371 322–3227–00 RES,FXD,FILM:2.26K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A6R441 322–3273–00 RES,FXD:METAL FILM,6.81K OHM,1%,0.2W 57668 CRB20T68EFX6811 A6R442 322–3281–00 RES,FXD:METAL FILM,8.25K OHM,1%,0.2W 57668 CRB20 FXE 8K25 A6R443 322–3164–00 RES,FXD,FILM:499 OHM,1%,0.2W 57668 CRB20T68EFX4990 A6R444 322–3385–00 RES,FXD:METAL FILM,100K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A6R513 322–3193–00 RES,FXD:METAL FILM,1K OHM,1%,0.2W 57668 CRB20T68EFX1001 A6R514 322–3097–00 RES,FXD,FILM:100 OHM,1%,0.2W 57668 CRB20T68EFX1000 A6R517 322–3204–00 RES,FXD,FILM:1.3K OHM,1%,0.2W 57668 CRB20T68EFX1301 A6R518 322–3097–00 RES,FXD,FILM:100 OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number A6R602 322–3289–00 A6R603 A6R604 Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number RES,FXD:METAL FILM,10K OHM,1%,0.2W 57668 CRB20T29EFX1002 322–3289–00 RES,FXD:METAL FILM,10K OHM,1%,0.2W 57668 CRB20T29EFX1002 311–2236–00 RES,VAR,TRMR:CERMET,20K OHM,20%,0.5W,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A6R726 308–0549–00 RES,FXD,WW:6.3K OHM,1%,3W 54294 LA461–6.3 KOHM +–1PERCENT A6R728 308–0549–00 RES,FXD,WW:6.3K OHM,1%,3W 54294 LA461–6.3 KOHM +–1PERCENT A6R729 322–3097–00 RES,FXD,FILM:100 OHM,1%,0.2W 57668 CRB20T68EFX1000 A6R734 322–3265–00 RES,FXD:METAL FILM,5.62K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A6R841 322–3222–00 RES,FXD:METAL FILM,2K OHM,1%,0.2W 57668 CRB20T68EFX2001 A6R842 322–3097–00 RES,FXD,FILM:100 OHM,1%,0.2W 57668 CRB20T68EFX1000 A6R843 322–3193–00 RES,FXD:METAL FILM,1K OHM,1%,0.2W 57668 CRB20T68EFX1001 A6R844 322–3354–00 RES,FXD:METAL FILM,47.5K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A6U211 156–1200–00 IC,LINEAR:BIFET,OP–AMP,QUAD,TL074CN/LF347N/MC 34004P,DIP14.3 01295 TL074CN A6U216 156–3599–00 IC,LINEAR:BIPOLAR,OP–AMP,CURRENT FEEDBACK,50MHZ,EL2020CN,DIP08.3 64762 EL2020CN A6U261 156–2460–00 IC,MISC:BIPOLAR,MODULATOR/DEMODULATOR, BALANCED,MC1496P,DIP14.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective 136–0925–00 Serial no. discont’d Name & description Mfr. code Mfr. part number SOCKET,DIP::PCB,24 POS,2 X 12,0.1 X 0.3 CTR,0.196 H X 0.130 TAIL,BECU,TIN,ACCOM 0.008–0.015 00779 2–641932–3 *END MOUNTING PARTS* A6U686 156–2584–00 IC,DIGITAL:HCMOS,FLIP FLOP,OCTAL D–TYPE,CLEAR,74HC273,DIP20.
Replaceable Electrical Parts 8–110 1780R-Series Service Manual
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number A7 Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number 671–0468–10 CIRCUIT BD ASSY:OSCILLATOR,NTSC (1780R ONLY) 80009 671–0468–10 A7 671–0989–10 CIRCUIT BD ASSY:OSCILLATOR,PAL (1781R ONLY) 80009 671–0989–10 A7C131 290–0920–00 CAP,FXD,ALUM:33UF,20%,50V,6 X 11MM,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A7C225 281–0758–00 CAP,FXD,CERAMIC:MLC,15PF,20%,100V 04222 SA102A150MAA A7C226 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V 04222 SA105E104MAA A7C227 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V 04222 SA105E104MAA A7C228 281–0775–01 CAP,FXD,CERAMIC:MCL,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A7C308 281–0773–00 CAP,FXD,CERAMIC:MLC,0.01UF,10%,100V 04222 SA101C103KAA A7C311 290–0943–00 CAP,FXD,ALUM:47UF,+50–20%,25V,6 X 11MM,RADIAL 62643 CEUSM1E470–Q A7C320 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V 04222 SA105E104MAA A7C327 281–0775–01 CAP,FXD,CERAMIC:MCL,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A7C395 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V 04222 SA105E104MAA A7C396 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V 04222 SA105E104MAA A7C408 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V 04222 SA105E104MAA A7C412 283–0177–00 CAP,FXD,CER DI:1UF,+80–20%,25V 04222 SR303E105ZAA A7C413 281–0775–01 CAP,FXD,CERAMIC:MCL,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A7L202 108–1212–00 INDUCTOR,FXD:CUSTOM,SIGNAL,9UH,2%,IDC<300 MA,RDC<1.6 OHM,Q>60@4MHZ,SRF>50 MHZ,AXIAL 0JR03 108–1212–00 A7L203 108–1212–00 INDUCTOR,FXD:CUSTOM,SIGNAL,9UH,2%,IDC<300 MA,RDC<1.6 OHM,Q>60@4MHZ,SRF>50 MHZ,AXIAL 0JR03 108–1212–00 A7L225 108–0422–00 INDUCTOR,FXD:CUSTOM,POWER,80UH,20%,IDC<2 A,RDC<0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A7R209 322–3147–00 RES,FXD,FILM:332 OHM,1%,0.2W 57668 CRB20 FXE 332E A7R210 322–3034–00 RES,FXD,FILM:22.1 OHM,1%,0.2W 91637 CCF50–22R1F–R36 A7R211 322–3034–00 RES,FXD,FILM:22.1 OHM,1%,0.2W 91637 CCF50–22R1F–R36 A7R212 322–3258–00 RES,FXD:METAL FILM,4.75K OHM,1%,0.2W 56845 CCF50–4751F–R36 A7R213 322–3231–00 RES,FXD,FILM:2.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A7R289 322–3269–00 RES,FXD,FILM:6.19K OHM,1%,0.2W 91637 CCF50–6191F–R36 A7R290 322–3269–00 RES,FXD,FILM:6.19K OHM,1%,0.2W 91637 CCF50–6191F–R36 A7R292 322–3097–00 RES,FXD,FILM:100 OHM,1%,0.2W 57668 CRB20T68EFX1000 A7R293 322–3158–00 RES,FXD,FILM:432 OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A7R355 315–0396–00 RES,FXD,FILM:39M OHM,5%,0.25W 50139 CB3965 A7R361 322–3139–00 RES,FXD,FILM:274 OHM,1%,0.2W 57668 CRB20T68EFX2740 A7R362 322–3269–00 RES,FXD,FILM:6.19K OHM,1%,0.2W 91637 CCF50–6191F–R36 A7R366 322–3097–00 RES,FXD,FILM:100 OHM,1%,0.2W 57668 CRB20T68EFX1000 A7R367 322–3097–00 RES,FXD,FILM:100 OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A7R423 322–3210–00 RES,FXD:METAL FILM,1.5K OHM,1%,0.2W 57668 CRB20 FXE 1K50 A7R424 322–3210–00 RES,FXD:METAL FILM,1.5K OHM,1%,0.2W 57668 CRB20 FXE 1K50 A7R426 322–3258–00 RES,FXD:METAL FILM,4.75K OHM,1%,0.2W 56845 CCF50–4751F–R36 A7R427 322–3258–00 RES,FXD:METAL FILM,4.75K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A7TP148 214–4085–00 TERM,TEST POINT:0.070 ID,0.220 H,0.063 DIA PCB,0.015 X 0.032 BRASS,W/ RED NYLON COLLAR 26364 TP104–01–02 A7TP149 214–4085–00 TERM,TEST POINT:0.070 ID,0.220 H,0.063 DIA PCB,0.015 X 0.032 BRASS,W/ RED NYLON COLLAR 26364 TP104–01–02 A7TP186 214–4085–00 TERM,TEST POINT:0.070 ID,0.220 H,0.063 DIA PCB,0.015 X 0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A7U307 156–1852–00 IC,DIGITAL:HCMOS,GATE,HEX INVERTER,UNBUFFERED,74HCU04,DIP14.3,TUBE 04713 MC74HCU04N A7U325 156–1367–00 IC,CONVERTER:CMOS,D/A,8BIT,400NS,CURRENTOUT, MPU COMPATIBLE,MULTIPLYING,AD7524JN,DIP16.3 24355 AD7524JN A7U330 156–0865–00 IC,DIGITAL:LSTTL,FLIP FLOP,OCTAL D–TYPE,CLEAR,74LS273,DIP20.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A7VR196 152–0195–00 DIODE,ZENER:5.1V,5%,0.5W,5.0MA IZT,1N5993B/BZX55C5V1,DO–35 04713 SZ11755RL A7VR209 152–0279–00 DIODE,ZENER:5.1V,5%,0.4W,1N751A,DO–7 OR DO–35 04713 1N751ARL A7VR324 152–0461–00 DIODE,SIG:6.2V,5%,0.4W,1N821,DO–7 04713 1N821 A7VR492 152–0195–00 DIODE,ZENER:5.1V,5%,0.5W,5.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A8 672–1283–02 CIRCUIT BD ASSY:INPUT & BNC,NTSC (1780R ONLY) 80009 672–1283–02 A8 672–1305–02 CIRCUIT BD ASSY:INPUT & BNC,PAL (1781R ONLY) 80009 672–1305–02 0KB01 129–0339–00 *ATTACHED PARTS* 129–0339–00 SPACER,POST:0.28 L,4–40 TAP/STUD,BRS,CU SN ZN PL,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A8C278 290–0848–00 CAP,FXD,ALUM:47UF,20%,16V,ESR=7.05 OHM(120HZ,25C),10X12MM,RADIAL. 62643 CEBPM1E470M A8C289 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V 04222 SA105E104MAA A8C291 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V 04222 SA105E104MAA A8C292 290–0974–00 CAP,FXD,ALUM:10UF,20%,50V,ESR=16.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A8C521 281–0812–00 CAP,FXD,CERAMIC:MLC,1000PF,10%,100V 04222 SA101C102KAA A8C525 290–0974–00 CAP,FXD,ALUM:10UF,20%,50V,ESR=16.58 OHM (120HZ,20C),RADIAL 55680 UVX1H100MDA A8C535 281–0563–00 CAP,FXD,CERAMIC:MLC,0.47UF,20%,50V 04222 SA305E474MAA A8C541 283–0636–00 CAP,FXD,MICA DI:36PF,2%,500V,0.370 X 0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A8R132 322–3481–00 RES,FXD,FILM:1M OHM.1%,0.2W 57668 CRB20 FXE 1M00 A8R147 322–3265–00 RES,FXD:METAL FILM,5.62K OHM,1%,0.2W 57668 CRB20 FXE 5K62 A8R148 322–3176–00 RES,FXD,FILM:665 OHM,1%,0.2W 91637 CCF50–6650F–R36 A8R151 322–3109–00 RES,FXD,FILM:133 OHM,1%,0.2W 91637 CCF50–1330F–R36 A8R165 322–3056–00 RES,FXD,FILM:37.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A8R278 322–3258–00 RES,FXD:METAL FILM,4.75K OHM,1%,0.2W 56845 CCF50–4751F–R36 A8R279 322–3105–00 RES,FXD,FILM:121 OHM,1%,0.2W 57668 CRB20 FXE 121E A8R281 322–3318–00 RES,FXD,FILM:METAL FILM,20K OHM,1%,0.2W 57668 CRB20T68EFX2002 A8R282 322–3457–00 RES,FXD,FILM:562K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A8R356 322–3201–00 RES,FXD:METAL FILM,1.21K OHM,1%,0.2W 57668 CRB20T68EFX1211 A8R357 322–3251–00 RES,FXD,FILM:4.02K OHM,1%,0.2W 57668 CRB20T68EFX4021 A8R358 322–3143–00 RES,FXD,FILM:301 OHM,1%,0.2W 57668 CRB20 FXE 301E A8R359 322–3130–00 RES,FXD,FILM:221 OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A8R433 315–0755–00 RES,FXD,FILM:7.5M OHM,5%,0.25W 50139 CB7555 A8R434 322–3431–00 RES,FXD,FILM:301K OHM,1%,0.2W 57668 CRB20 FXE 301K A8R435 315–0226–01 RES,FXD,FILM:22 M OHM,5%,0.25W 50139 CB2265 A8R438 322–3147–00 RES,FXD,FILM:332 OHM,1%,0.2W 57668 CRB20 FXE 332E A8R439 322–3210–00 RES,FXD:METAL FILM,1.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A8A1J3 131–0955–00 CONN,RF JACK:BNC,50 OHM,FEMALE 00779 87–3334–017 210–0013–00 WASHER,LOCK:0.391 ID INTL,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number A9 671–0463–02 A9 671–0463–03 Serial no. effective B030489 Serial no. discont’d Name & description Mfr. code Mfr. part number B030488 CIRCUIT BD ASSY:FRONT TOUCH PNL 80009 671–0463–02 CIRCUIT BD ASSY:FRONT TOUCH PNL 80009 671–0463–03 *ATTACHED PARTS* 211–0022–00 SCR,MACH:2–56 X 0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A9DS428 150–1168–00 DIODE,OPTO:LED,940NM,100MW,50MA IF,5V REVERSE,1.4VF AT 20MA,100PF,SE308T 4T165 SE308T A9DS436 150–1168–00 DIODE,OPTO:LED,940NM,100MW,50MA IF,5V REVERSE,1.4VF AT 20MA,100PF,SE308T 4T165 SE308T A9DS446 150–1168–00 DIODE,OPTO:LED,940NM,100MW,50MA IF,5V REVERSE,1.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective A9S188 260–2675–00 B030489 Serial no. discont’d Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective A9S291 260–2673–00 B030489 Serial no. discont’d Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A9U297 156–1191–00 IC,LINEAR:BIFET,OP–AMP,DUAL, TL072CN/LF353N,DIP08.3 01295 TL072CP A9U495 156–1150–00 IC,LINEAR:BIPOLAR,VOLTAGE REGULATOR, NEGATIVE,–5.0V,100MA,4%,MC79L05ACP,TO–92 04713 MC79L05ACP A9U498 156–0991–00 IC,LINEAR:BIPOLAR,VOLTAGE REGULATOR, POSITIVE,5.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number A10 671–0925–01 A10 671–0925–02 CIRCUIT BD ASSY:MPU ANNEX 80009 671–0925–02 A10C207 290–0974–00 CAP,FXD,ALUM:10UF,20%,50V,ESR=16.58 OHM (120HZ,20C),RADIAL 55680 UVX1H100MDA A10C211 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V,Z5U 04222 SA105E104MAA A10C230 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V,Z5U 04222 SA105E104MAA A10C312 281–0775–01 CAP,FXD,CERAMIC:MCL,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A10R208 322–3093–00 RES,FXD,FILM:90.9 OHM,1%,0.2W,MI,SMALL BODY 91637 CCF50–90R9F–R36 A10R209 322–3093–00 RES,FXD,FILM:90.9 OHM,1%,0.2W,MI,SMALL BODY 91637 CCF50–90R9F–R36 A10R210 322–3093–00 RES,FXD,FILM:90.9 OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A10U420 156–1917–00 IC,DIGITAL:LSTTL,REGISTER,8–BIT SHIFT,OUTPUT LATCH,74LS595,DIP16.3,TUBE 01295 SN74LS595N A10U437 156–1535–00 IC,PROCESSOR:NMOS,PERIPHERAL,PROGRAMMABL E KEYBOARD INTERFACE,8279–5,DIP40.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A11 671–0469–03 CIRCUIT BD ASSY:INTERCONNECT 80009 671–0469–03 A11J116 131–5531–00 CONN,HDR:PCB,MALE,RTANG,1 X 7,0.1 CTR,0.235 MLG X 0.115 TAIL,GOLD, 53387 2407–5112TB A11J133 174–1168–00 CA ASSY,SP:RIBBON,IDC,10,28AWG,4.25L,2X10,0.1, PCB,X 2X10,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number A11R127 311–2442–02 Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number RES,VAR,PNL:CP,10K OHM,10%,0.5W,LINEAR,CONTINUOUS ROTATION,0.5 SQ,2.0 LONG SHAFT 12697 S–1–20629 *ATTACHED PARTS* 366–0649–00 KNOB:GY,0.127 ID X 0.392 OD X 0.5 H 80009 366–0649–00 214–4726–00 SPRING;CONICAL SPRING, 0.026, 302 STAINLESS STEEL, 0.313, ± 0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number A12 671–0462–01 Serial no. effective B030489 Serial no. discont’d Name & description Mfr. code Mfr. part number B030488 CIRCUIT BD ASSY:FRONT SW PNL 80009 671–0462–01 A12 671–0462–02 CIRCUIT BD ASSY:FRONT SW PNL 80009 671–0462–02 A12DS104 150–1211–00 LT EMITTING DIO:GREEN,2.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A12DS206 150–1211–00 LT EMITTING DIO:GREEN,2.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number 361–1484–00 SPACER,LED:NYLON 0JR05 361–1484–00 150–1211–00 LT EMITTING DIO:GREEN,2.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A12DS334 150–1211–00 LT EMITTING DIO:GREEN,2.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number A12S105 260–2401–00 A12S105 260–2673–00 Serial no. effective Serial no. discont’d B030488 B030489 Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number A12S225 260–2401–00 A12S225 260–2673–00 Serial no. effective Serial no. discont’d B030488 B030489 Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number A12S405 260–2401–00 A12S405 260–2673–00 Serial no. effective Serial no. discont’d B030488 B030489 Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number A13 671–0548–01 A13 671–0548–02 A13DS111 Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number A14 671–0549–01 A14 671–0549–02 A14DS110 Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A15 671–0547–04 CIRCUIT BD ASSY:FILTER 80009 671–0547–04 A15C100 283–0177–00 CAP,FXD,CER DI:1UF,+80–20%,25V 04222 SR303E105ZAA A15C110 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V,Z5U 04222 SA105E104MAA A15C111 281–0775–01 CAP,FXD,CERAMIC:MCL,0.1UF,20%,50V,Z5U 04222 SA105E104MAA A15C130 281–0775–01 CAP,FXD,CERAMIC:MCL,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A15CR300 152–0066–00 DIODE,RECT:400V,1A,IFSM=30A, 1.2VF,2US,GP10G/1N5060 0LUA3 1N5060 A15CR310 152–0066–00 DIODE,RECT:400V,1A,IFSM=30A, 1.2VF,2US,GP10G/1N5060 0LUA3 1N5060 A15J310 174–1173–00 CA ASSY,SP:RIBBON,IDC,34,28AWG,2.0L,2X17,0.1,CTR PLZ,RCPT W/PULLTAB X 2X17,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A15U251 156–2992–00 IC,MEMORY:CMOS,SRAM,2K X 8,35NS,OE,DIP24.3 62786 HM6716P–35 A15U260 156–2992–00 IC,MEMORY:CMOS,SRAM,2K X 8,35NS,OE,DIP24.3 62786 HM6716P–35 A15U261 160–6005–01 IC,DIGITAL:CMOS,PLD,EEPLD,16V8,25NS,90MA,PRGM 156–2983–00,16V8–25,DIP20.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A15U470 156–1722–00 IC,DIGITAL:FTTL,GATE,HEX INVERTER,74F04,DIP14.3,TUBE 04713 MC74F04N A15W121 131–0566–00 BUS,CONDUCTOR:DUMMY RES,0.094 OD X 0.225 L W/WIRE LEADS 57668 TPW 02–000 A15W123 131–0566–00 BUS,CONDUCTOR:DUMMY RES,0.094 OD X 0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A16 671–0882–04 CIRCUIT BD ASSY:WAVEFORM HV 80009 671–0882–04 A16C100 290–0939–00 CAP,FXD,ELCTLT:10UF,+100–10%,100V AL 62643 672D106H100CG2C A16C101 283–0057–00 CAP,FXD,CER DI:0.1UF,+80–20%,200V SQUARE 04222 SR302E104ZAA A16C102 283–0057–00 CAP,FXD,CER DI:0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Name & description Mfr. code Mfr. part number A16C562 281–0819–00 CAP,FXD,CERAMIC:MLC,33 PF,5%,50V 04222 SA102A330JAA A16CR140 152–0061–00 DIODE,SIG:200V,0.1A,700NS,4.0PF,1N3070/FDH2161 01295 PV120 FAMILY A16CR141 152–0061–00 DIODE,SIG:200V,0.1A,700NS,4.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A16L560 108–1450–00 INDUCTOR,FXD:SIGNAL,5.6UH,10%,IDC<0.5 A,RDC<0.4 OHM,Q>45@7.96MHZ,SRF>40 MHZ,AXIAL 24226 ML10–561K A16Q100 151–0750–00 TRANSISTOR,SIG:BIPOLAR,NPN,400V,300MA, 20MHZ,AMPLIFIER,MPSA44,TO–92 EBC 50891 MPSA44 A16Q110 151–0710–00 TRANSISTOR,SIG:BIPOLAR,NPN,40V,1.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A16R122 311–2239–00 RES,VAR,TRMR:CERMET,100K OHM,20%,0.5W,0.197 SQ,TOP ADJUST TK2073 GF06UT2 104 M L20 A16R123 315–0333–00 RES,FXD,FILM:33K OHM,5%,0.25W 50139 CB3335 A16R130 311–1256–00 RES,VAR,TRMR:CERMET,2.5M OHM,10%,0.5W,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Name & description Mfr. code Mfr. part number A16R440 315–0155–00 RES,FXD,FILM:1.5M OHM,5%,0.25W TK1727 SFR25 2322–181–63106 A16R441 322–3165–00 RES,FXD,FILM:511 OHM,1%,0.2W,TC=T0 57668 CRB20 FXE 511E A16R442 322–3363–00 RES,FXD,FILM:59K OHM,1%,0.2W,TC=T0 57668 CRB20 FXE 59K0 A16R450 322–3193–00 RES,FXD:METAL FILM,1K OHM,1%,0.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number A17 671–0883–04 CIRCUIT BD ASSY:FUSE 80009 671–0883–04 A17C310 285–1222–00 CAP,FXD,PLASTIC:0.068UF,20%,250V 37942 158/.
Replaceable Electrical Parts Replaceable electrical parts list (cont.) Component number Tektronix part number Serial no. effective Serial no. discont’d Name & description Mfr. code Mfr. part number CHASSIS PARTS B1 119–1545–03 FAN,TUBE AXIAL:12V, 1.56W,37CFM,80 MM, W/SOLID MOUNTING FLANGES 80009 119–1545–03 P300 174–1500–00 CA ASSY,SP:RIBBON,CPR,3,26AWG,3.0L, 1X3,0.1 CTR,RCPT X 0.25 CUT &STRIP 23633 ORDER BY DESCRIPTION Q300 151–0678–00 TRANSISTOR,PWR:BIPOLAR,NPN,400V, 4.
Diagrams and Circuit Board Illustrations This section contains the troubleshooting procedures, block diagrams, circuit board illustrations, component locator tables, waveform illustrations, and schematic diagrams. Symbols Graphic symbols and class designation letters are based on ANSI Standard Y32.2-1975. Abbreviations are based on ANSI Y1.1-1972. Logic symbology is based on ANSI/IEEE Standard 91-1984 in terms of positive logic.
A8 Input & BNC Board <1> Component Locator CIRCUIT NUMBER C103 C126 C208 C218 C221 C222 C223 C230 C231 C242 C245 C246 C247 C307 C313 C319 C336 C343 C411 C412 C424 C435 C436 C448 C504 C505 C512 C519 C520 C521 C525 C535 C541 C542 C543 C548 SCHEM LOCATION B2 B4 D1 B2 B2 G1 B2 D3 D3 B4 B3 G3 B3 D1 D1 F1 D3 F3 E2 F2 B3 E4 F4 B3 A5 B5 F2 G2 G2 F2 B3 F4 G4 G4 F4 B3 CIRCUIT NUMBER SCHEM LOCATION CR212 CR224 CR235 CR248 CR307 CR331 C2 D2 C4 D4 D1 D3 J5 J512 J6 J7 J8 A4 A4 A3 A2 A1 K213 K238 C1 C3 L115 L1
+12VE +12VE R307 301.0 VIDEO AMPLIFIER C307 .001UF R315 100.0 Q315 C313 56PF 1 L116 48NH J8 1 +12VE R114 37.4 CH-A R115 1.00M C218 .1UF GNDREF CR224 D-0141 +12VE R104 133.0 8 3 2 C103 .1UF COMMON MODE GND +12V +12V VIDEO AMPLIFIER +12VD C247 .1UF C245 10UF C448 .001UF C548 10UF R546 10.0 L139 48NH 1 +12VD R131 37.4 CH-B1 10 9 2 C242 .1UF R132 1.00M GNDREF R230 4.
2 Waveforms for Diagram 2 are the same as those for diagram 1, when a specific channel is selected and the video signal is present.
+12VC +12VC R354 301.0 VIDEO AMPLIFIER C354 .001UF D-0141 CR355 +12VC Q362 Q-1059 Q251 L163 48NH J4 1 R165 37.4 CH-B2 +12VC R166 1.00M C266 .1UF L162 48NH J3 GNDREF R255 4.75K U264D CA3046 1 4 R270 6.19K 12 U264B CA3046 +12VC R151 133.0 8 U354A TL072 1 3 2 C150 .1UF COMMON MODE GND R351 332.0 Q363 Q-0198 1 3 R170 5.62K +12VC R464 332.0 U264C CA3046 CR271 D-0141 1 0 +12VC C459 100PF R171 665.0 R365 750.
A6 Vectorscope & A2 Waveform Board <3> Component Locator CIRCUIT NUMBER SCHEM LOCATION A6 A6 Vectorscope & A2 Waveform Board <3> Component Locator C297 C391 C392 C394 C395 C490 C491 C492 C493 C494 C495 A1 D1 C2 D3 D3 B3 B3 B3 A2 B2 A2 CR294 CR493 C3 B2 J389 J498 J899 E2 A2 E5 P1203 P1203 P389 A2 E2 E2 Q294 Q295 Q296 Q390 Q492 Q493 Q496 Q897 D2 D3 C3 D2 C2 B2 C2 D5 R295 R296 R297 R298 R390 D3 C3 C3 D2 D2 CIRCUIT NUMBER SCHEM LOCATION R391 R392 R393 R394 R395 R396 R397 R398 R399 R490 R491 R4
PROBE INPUT AMPLIFIER PROBE OUTPUT AMPLIFIER Q295 Q390 Q492 +12V C297 10UF +12V1 +12V R490 3.32K +12V1 SHIELD BOX D-0166 VR390 6.2V C391 .1UF -12VDCPL Q493 R397 20.0 FRONT PANEL -12V C494 4700PF R499 249.0 R391 100.0 +12V S DG Q-0188 Q496 PROBE P1203 1 2 C495 .047UF J498 1 2 R495 1.13M R494 475.0K C493 1.8-10PF PROBE COMP Q493 Q-1025 R492 9.1M Q-0190 R1113 10.0 2 +12V1 C1113 22PF Q1115 Q-0190 Q-0711 1V VIDEO R1115 2.21K R390 47.
A2 Waveform Board <4> Component Locator CIRCUIT NUMBER SCHEM LOCATION C1024 C1029 C1036 C1040 C1131 C1232 C1329 C1426 C1440 C1441 C1443 C1536 C934 C936 C1 C1 D1 D1 A3 A3 A2 C5 E5 H5 F4 F3 B1 E1 CR1022 CR1040 CR1430 CR1433 CR1435 CR1444 CR1445 CR1525 CR1526 CR1530 CR1534 CR1540 CR1544 CR1545 B1 D1 E4 D5 E3 G4 G3 E2 F2 F4 F3 G5 G5 G5 J1 J1133 J1231 J1322 J1331 J1446 J2 F5 A3 A3 A1 A2 H3 F5 Q1025 Q1028 B1 C1 CIRCUIT NUMBER SCHEM LOCATION Q1034 Q1036 Q1341 Q1346 Q1424 Q1427 Q1429 Q1434 Q1438 Q1443 Q
R934 10.0 + AMPLIFIER +12V1 R1021 332.0 C934 .1UF A8 INPUT & BNC BOARD C1024 47PF Q1025 Q-0719 R1321 953.0 J1322 2 1 1 3 1 4 R1322 100.0 1 R1029 100.0 U1327A CA3102 4 R1128 124.0 C1029 .1UF <7> H2 2 SEL_A+ <1> 5 SIG_A SIG_B J1331 CONNECTS TO P1331 A8 INPUT & BNC BOARD 5 -12V1 REFERENCE SWITCH CURRENT_+12V1 SIG_A SIG_B SIGNAL_+ 1 4 R1233 100.0 R1332 1.00K 7 R1329 100.0 6 8 U1327B CA3102 11 <7> C1232 2-18PF SIG B2 10 SEL_B1+ D-0217 VR1524 8.2V 12 <7> R1336 100.
A2 Waveform Board <5> Component Locator CIRCUIT NUMBER SCHEM LOCATION C1028 C1041 C1042 C1046 C1047 C1134 C303 C825 C826 C829 C830 C831 C832 C835 C836 C837 C838 C842 C844 C845 C848 C852 C918 C922 C929 C930 C931 C932 C941 C945 C946 C947 C948 C950 C951 E5 D1 D1 E2 E2 B1 G5 D5 E2 D2 D3 D2 C2 B1 B1 F4 E4 G4 D4 D4 D3 D3 A4 B4 A3 D2 B1 B1 C1 C3 C3 D1 F2 D3 F2 CR1031 CR302 CR721 CR722 CR735 CR736 CR738 E5 F5 G5 F3 F4 G3 H4 CIRCUIT NUMBER SCHEM LOCATION CR743 CR751 CR824 CR828 CR840 CR914 CR915 CR928 H3 H2
+12V1 +12V1 DIFFERENCE AMPLIFIER D1 R1134 487.0 <4> R1036 750.0 1 7 8 9 8 1 4 2 <4> <7> C931 10UF C932 .1UF R932 47.5 VR931 6.2V R943 2.00K C941 200PF C947 200PF 12 14 13 R1041 2.00K R1042 2.00K C1042 214PF C1041 170PF 4 U1046A MC34084 3 R1043 2.00K 1 2 LP TRANS RESP U1046B MC34084 R1046 2.00K 5 R1048 499.0 7 6 C1046 125PF C1047 253PF 1 1 -12V1 R935 1.00K 9 C831 2-18PF BP 1 R930 75.0 J931 2 1 R752 4.99K +12V1 F3 R750 49.9K P931 T835 C832 .
A2 Waveform Board <6> Component Locator CIRCUIT NUMBER SCHEM LOCATION C212 C318 C320 C410 C411 C412 C414 C415 C418 C422 C423 C429 C435 C522 C523 C527 C533 C609 C610 C611 C614 C620 C630 C634 C725 G4 G4 E3 B3 B4 B3 C3 E4 F4 F3 F3 F1 E1 E2 F3 F1 F2 D4 D4 D4 C4 B5 E1 E2 B5 CR403 CR407 CR408 CR409 CR410 CR521 CR522 CR625 F5 E5 F5 F5 E5 D3 F2 B5 CIRCUIT NUMBER SCHEM LOCATION L339 L427 L437 L519 L615 L626 L638 E1 F2 E1 C3 B5 D2 E1 Q310 Q312 Q321 Q421 Q423 Q425 Q427 Q428 Q433 Q514 Q518 Q519 Q520 Q521 Q611
C435 .1UF L339 64UH +60V L437 2.7UH L638 2.7UH R637 1K R437 1K BLUE +30V CRT+ CRT- R636 100.0 R433 100.0 Q635 Q433 DEFLECTION AMP R540 25.5K ORTHOGONALITY +12V1 L626 2.7UH R527 1.00K C630 27PF R534 100 Q630 R629 150.0 -12V1 Q628 -12V1 C429 27PF C533 51PF Q428 L427 2.7UH R425 150.0 R529 1.00K -12V1 R532 249.0 C634 .1UF -12V1 R431 61.9 Q427 +12V1 R530 249.0 4 R428 4.12K R533 357.0 R528 287.0 H3 <42> +12V1 C527 2-18PF R535 61.
A2 Waveform Board <7> Component Locator CIRCUIT NUMBER SCHEM LOCATION C1003 C1011 C1016 C1019 C1117 C1414 C1415 C1517 C713 C812 C817 C913 B1 E4 F4 H4 E4 C1 C2 B5 C4 C4 C4 F5 CR1011 CR1111 CR1304 CR1312 CR1313 CR1405 CR912 CR913 G4 G4 B5 C1 C1 B5 E4 D4 J1103 J1406 J9 H1 D5 H1 P1103 H1 A2 Waveform Board <7> Component Locator CIRCUIT NUMBER SCHEM LOCATION Q1304 Q1415 B5 C1 R1005 R1006 R1007 R1008 R1009 R1010 R1012 R1013 R1016 R1018 R1019 R1020 R1103 R1105 R1119 R1304 R1305 R1414 R1415 R1416 R141
+5VD +5VD R1414 6.19K C1003 .1UF INPUT SELECTION B1 <12> ED_[0..7] ED_[0..7] C3 <12> CLK[0..2] B1 <12> J130-7 /ERSTO CLK[0..2] 3 ED_1 4 ED_2 7 ED_3 8 ED_4 13 ED_5 14 ED_6 17 ED_7 18 CLK0 11 /ERSTO 1 D1 Q1 D2 Q2 D3 Q3 D4 Q4 D5 Q5 D6 Q6 D7 Q7 D8 R1417 1.00K CR1313 U1516 74HC273 ED_0 U1523 74HCT238 C1414 15PF R1105 10.
A2 Waveform Board <8> Component Locator CIRCUIT NUMBER SCHEM LOCATION C1010 C1066 C1067 C1070 C1071 C1072 C1075 C1079 C1160 C1171 C1179 C1247 C1251 C1252 C1254 C1267 C1272 C1276 C1281 C1365 C1370 C1374 C1379 C1380 C1381 C1383 C1467 C1473 C1477 C1480 C1489 C1570 C1571 C1575 C1582 C865 C965 C966 C967 B3 D4 B3 B4 B3 B3 F3 F3 G5 D3 E3 E5 D5 E5 F4 B5 A5 D3 E3 C5 C2 C1 D1 D1 D1 E1 C2 C1 D1 D2 F1 B2 B1 B1 G1 A4 A4 A3 B4 CR1010 CR1154 CR1155 CR1254 CR1273 B3 F5 F4 F4 F2 CIRCUIT NUMBER SCHEM LOCATION J1483
LOW PASS FILTER +12V2 H4 1 <4> R1570 887.0 R1576 887.0 R1575 100.0 REFERENCE SYNC SEPARATOR Q1475 REF_VIDEO R1475 806.0 C1571 77PF C1575 87PF R1473 806.0 R1472 100.0 C1374 130PF C1381 .22UF Q1374 C1379 47UF C1473 47PF R1474 2.21K Q1483 R1467 100.0 +12V2 1780R 1781R C1067 220PF 150PF C1480 1UF C1570 51PF C1370 220PF Y1010 3.587412MHZ 4.437500MHZ R1370 6.65K 4.99K 150PF 8 R1387 26.1K R1388 750.0K R1470 2.21K 1-2 NORMAL 2-3 SIS 2 R1378 3.32K R1477 47.
A2 Waveform Board <9> Component Locator CIRCUIT NUMBER SCHEM LOCATION C196 C198 C285 C287 C290 C380 C390 C495 C496 C767 C771 C855 C858 C861 C870 B3 C3 D2 C2 E2 B2 D2 E3 F3 B5 C5 G4 G4 E5 C5 CR385 CR386 CR392 D2 D2 E2 J192 J858 J865 J866 J867 B1 G5 D4 D4 D4 P192 P858 P865 P866 P867 B1 G5 D4 D4 D4 A2 Waveform Board <9> Component Locator CIRCUIT NUMBER SCHEM LOCATION Q282 Q385 Q391 Q861 C2 D2 E2 F5 R180 R187 R196 R197 R281 R282 R283 R285 R286 R287 R288 R290 R385 R390 R392 R393 R495 R496 R695 R69
REF OR REMOTE SYNC SWITCH G2 <8> <12> 12 U185C 74HC00 9 11 13 /REM_SYNC_EN J147-6 8 10 R187 200.0 1 B5 <10> DIR_REMSYNC P192 J192 B3 <12> U185D 74HC00 COMP_SYNC B4 1 2 3 REM_SYNC J147-4 U190E 74HC04 10 11 R180 500.0 U185A 74HC00 1 2 U190A 74HC04 2 1 J147-20 U185B 74HC00 4 B5 6 5 J192 REMOTE SYNC POLARITY <10> /DIR_REMSYNC_EN +5VD 1-2 POSITIVE 2-3 NEGATIVE U190B 74HC04 3 4 B4 <12> REF_SYNC 3 V SYNC DETECTOR R283 20.0K +12V2 R282 20.0K NC R281 20.0K Q282 C380 .
A2 Waveform Board <10> Component Locator CIRCUIT NUMBER SCHEM LOCATION C394 C485 C587 C593 C690 C693 C786 C793 C795 E3 E4 E2 F2 E2 F4 D1 C4 B5 CR485 CR488 CR590 CR592 CR775 CR777 CR778 CR795 E2 E2 F2 F4 D1 D2 D1 B4 J585 J694 G3 B4 P585 P694 G3 B4 Q361 Q386 Q589 Q686 C3 E4 E2 F4 R363 D3 A2 Waveform Board <10> Component Locator CIRCUIT NUMBER R387 R388 R394 R463 R485 R486 R487 R488 R489 R490 R492 R493 R581 R583 R587 R588 R590 R591 R592 R593 R686 R687 R688 R689 R690 R691 R692 R786 R793 R795 SC
RETRACE & SWITCH BLANKING +5VD E3 R786 C786 270PF B2 D-0141 <7> 3.57K <11> CR778 SWITCH_BLANK 1 4 U789A 74HC221 LINE SWEEP GATING U775A 74HC32 1 B4 <12> 2 LINESEL_RETR C X R X A Q C L B 13 12 NC 4 Q U775D 74HC32 D-0141 CR775 11 13 3 D-0141 CR777 +5VD 3 2 J147-5 2 U780A 74C08 1 3 1 RETRACE_&_SWITCH_BLK 1 5 LINE RAMP GENERATOR END OF SWEEP DETECTOR +5VD 2 U880B 74HC04 4 3 E5 <12> LINE 4 U775B 74HC32 R692 1.00K 1 R690 2.74K 6 5 Q-0190 Q589 R689 26.
A2 Waveform Board <11> Component Locator CIRCUIT NUMBER SCHEM LOCATION C267 C352 C368 C381 C469 C474 C477 C478 C482 C549 C571 C572 C575 C576 C580 C586 C649 C651 C670 C675 C765 F2 G2 F2 B5 D3 C3 C3 C3 A1 G3 D3 D3 D3 A2 C2 B4 G4 G2 D2 C1 B2 CR251 CR252 CR377 CR469 CR566 CR573 CR577 CR579 CR581 CR582 CR651 CR667 CR672 CR673 F2 F3 D3 E3 E4 D2 C2 B2 B2 A2 G2 F3 A3 A3 CIRCUIT NUMBER SCHEM LOCATION CR675 C1 Q267 Q354 Q365 Q470 Q472 Q473 Q474 Q475 Q476 Q477 Q478 Q544 Q547 Q550 Q555 Q573 Q583 Q584 Q643 Q65
B1 <12> 1 4 12 J130-2 /W_RO_EN U580C CA3046 C482 .1UF B2 WAVEFORM BLANKING 1 3 J130-22 +5VD -2.2V CURS_SEL B5 R681 2.21K E3 +5VD <12> CR675 6 B3 R679 2.21K R675 1.00K 7 J147-1 G2 VR578 8.2V D-0217 F2 <13> EXT_HORZ H1 <10> R678 2.49K R683 2.21K R781 35.7K D-0141 CR579 CR582 D-0141 <10> VR483 33V 1 B3 J147-2 D-0141 CR673 E5 R775 1.65K <12> E4 R380 11.5K R481 1.00M FIELD /RGB_EN <12> R478 2.00K D-0141 CR672 /EXT_HORZ_EN R589 7.
A2 Waveform Board <12> Component Locator SCHEM LOCATION CIRCUIT NUMBER SCHEM LOCATION C248 C250 C252 C707 C708 C710 C711 C808 C810 C906 C907 C908 G1 G1 G2 H4 H4 H3 G3 H3 H3 H2 H5 H4 U274 U275 U605A U605B U605C U605D U705 U708 U810A U810B U810C U810D D4 D5 H4 H3 H3 H4 D3 F2 H3 H5 H4 H2 J130 J147 A1 A3 VR905 G3 R231 R232 R255 R256 R710 R808 E2 E2 G2 G2 G3 G3 U207 U217 U220 U231 U245A U245B U245C U251B U251C U251D C3 D2 D1 E1 G2 G1 G1 G1 G2 G1 C1058 C1060 C1141 C1145 C1146 C1150 C1366 C1465 C157
VECT_GAIN A1 <7> J130 1 2 3 4 5 6 7 8 9 10 11 J130 CONNECTS TO J531 A11 INTERCONNECT BOARD A1 <44> 12 13 14 15 16 17 18 NOTE: SEE TABLE 12 FOR SIGNAL ORIGIN OR DESTINATION 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 1 <6> <11> V_RO_DATA_WFM 2 /W_RO_EN 3 LATCHES ED_[0..
A2 Waveform Board <13> Component Locator CIRCUIT NUMBER A2 Waveform Board <13> Component Locator SCHEM LOCATION C758 E5 CR1060 CR1061 CR1141 CR1142 CR1150 CR1151 CR1365 CR1366 CR1588 CR1593 CR1597 CR358 CR359 CR458 CR459 CR462 CR463 CR559 CR658 CR659 F4 F4 E4 D4 D3 E3 F3 F3 B4 B4 B3 F2 G2 E2 E2 D2 E2 D2 D1 E1 L157 L758 E5 E5 Q1586 Q658 G4 D1 R1577 G5 CIRCUIT NUMBER R1578 R1583 R1584 R1585 R1586 R1589 R1590 R1591 R1593 R1597 R1598 R1599 R357 R358 R359 R360 R361 R458 R460 R461 R462 R558 R559 R56
SLOW SWEEP TRIGGER F1 <8> +12V2 +12V2 AGC_VIDEO 4 R761 3 200K SLOW SWEEP TRIG LEVEL U458A TL074 1 2 C661 .1UF R663 121.0K C457 .1UF CR658 D-0141 R658 100.0K Q658 Q-0188 1 1 SLOW SWEEP RAMP GENERATOR +12V2 -12VDCPL R656 1.00M -12VDCPL E5 U260B 74HC04 3 4 <12> SLW_SWP_+/- 5 U458B TL074 7 6 C557 .1UF +12V2 R661 5.62K C660 10UF CR462 NC R659 1.00M R558 33.2K D-0141 U458C TL074 9 R458 10.0K 8 10 CR559 D-0141 R662 1.00K U260A 74HC04 1 2 D-0141 CR659 R559 4.75K R657 1.
A2 Waveform Board <14> Component Locator CIRCUIT NUMBER A2 Waveform Board <14> Component Locator SCHEM LOCATION C875 C969 B3 D2 J1081 J1085 J870 E2 F3 C2 P1081 P1085 E2 F3 Q969 Q970 D2 D2 R1070 R1085 R872 R968 R969 R970 R985 D2 F3 B4 C2 D2 D2 E2 TP981 F3 U975A U975B U977 U980 U985A U985B B3 B4 C3 E3 F2 G2
OSCILLATOR PHASE CONTROL E5 FLOP1 <15> FLOP2 <15> +5VD +5VD 1 U985B 0 74HC74 U985A 4 74HC74 H4 +12V2 NTSC -- F1 L11 PAL -- F1 L7 EXT V1 PULSE NOT USED J870 1 2 3 SYNC_GATE 1-2 INTERNAL 2-3 EXT VIDEO R1070 10.0K D P R 12 D 11 5 Q CK C L CK C L 6 Q P R Q Q 9 8 E5 1 3 1 P1081 J1081 R970 10.0K R969 30.1K C969 .001UF R968 100.0 3-5V P-P <15> J1081 FRAME PULSE SELECT +5VD +5VD 2 3 2 1 +5VD Q969 R985 1.
A2 Waveform Board <15> Component Locator CIRCUIT NUMBER SCHEM LOCATION C991 C1086 C1090 C1091 C1093 C1094 C1194 C1195 C1284 C1287 C1288 C1291 C1347 C1351 C1364 C1386 C1390 C1391 C1394 C1395 C1397 C1490 C1497 C1550 C1553 C1554 C1555 C1560 C1561 C1563 G1 E3 G1 E3 H1 E3 E3 C3 C4 D3 D3 D3 B2 E2 G3 B3 B3 B4 D5 E4 C5 H1 H1 B1 D2 D1 D2 D1 D1 D1 CR1259 G1 CIRCUIT NUMBER SCHEM LOCATION CIRCUIT NUMBER SCHEM LOCATION CR1288 CR1357 CR1358 CR1360 D3 F3 F2 G3 J986 E4 L1350 E2 P986 E5 Q1092 Q1293A Q1293B
50%_PT_OUT C1561 .1UF 9 7 C1563 5000PF X8 GAIN CLAMPED AMP R1558 47.5K +12V2 R1557 1.00K Q1551 C1550 .1UF R1450 1.00K <4> C1347 47UF R1455 10K C1560 .1UF C1554 .1UF -12V2 R1549 2.21K INT_VIDEO 10 11 12 5 C1553 .1UF Q1451 Q-0188 VLC N/C NUL -V NUL C991 1UF R1353 2.00K 13 3 NC 4 NC +5VD C1090 1UF Q1359 Q-0188 R1363 475.0 R1360 475.0 Q-0188 U1357A CA3046 OUT IN S/H HOLD VLC N/C NUL -V NUL +5VD C1093 .
COMPONENT NUMBER EXAMPLE A23 A2 R1234 A5 Microprocessor Board <16> Component Locator CIRCUIT NUMBER C135 C137 C140 C142 C145 C240 C335 C336 C342 C344 C433 C434 SCHEM LOCATION G3 H3 H3 G4 H4 H4 G4 H4 H4 G4 B3 B2 CIRCUIT NUMBER SCHEM LOCATION C440 C445 C450 C534 C540 C541 H4 H4 G4 H4 A5 A5 J342 J344 B4 A5 R355 R360 E1 E3 A5 Microprocessor Board <16> Component Locator SCHEM LOCATION CIRCUIT NUMBER SCHEM LOCATION R430 R431 R435 R436 A5 B5 B3 B2 U120A U120B U1
LATCH/BUFFER IA[0..23] F1 <17> AD[0..15] AD[0..15] U137 74ALS373 U340 VISUAL AID 43 U340 32CG16-10 27 44 26 20 +5V 54 32CG16 51 (TOP) 30 60 3 10 61 1 9 63 52 56 26 39 10 MICROPROCESSOR VCCL AD0 VCCCTTL AD1 VCCFCLK AD2 VCCAD VCCIO VSSL VSSFCLK VSSNTSO VSSHAD VSSLAD VSSIO AD3 AD4 AD5 AD6 AD7 AD8 AD9 AD10 AD11 AD12 AD13 NC 18 NC 19 RESERVED AD14 RESERVED AD15 A16 A17 C434 22PF A18 OSCIN 62 OSCIN A19 A20 Y435 20MHZ R435 75.0 R436 267.
A5 Microprocessor Board <17> Component Locator CIRCUIT NUMBER A5 Microprocessor Board <17> Component Locator SCHEM LOCATION C150 C155 C210 C215 C220 C255 C257 C261 C457 A2 A2 B2 A3 A3 B3 A3 A3 B3 J453 B1 P453 B1 R361 R362 R363 R364 R450 R456 R460 C5 C5 C4 C5 C3 C3 C4 CIRCUIT NUMBER SCHEM LOCATION U150 U151 U155 U156 U157 U158 U160 U161 U310 U315 U320 U353 U357 U361 U450A U450B U450C U450D U457 U595A U595B E1 F1 E2 F2 E3 F3 E4 F4 G1 G2 G4 C1 C2 B4 D3 C3 C3 C3 C4 A5 A5
H1 <16> IA[0..23] IA[0..23] C1 ADDRESS MULTIPLEXER IA9 P453 1 2 3 IA17 J453 J453 RAM PART SELECTION 1-2 128K RAM INSTALLED (NORM) 2-3 512K RAM INSTALLED AD[0..15] IA1 1A 3 IA10 6 IA11 11 IA3 10 IA12 14 IA4 13 /COL 1Y 2A Q1 7 2Y 2B 3A Q2 9 3Y 3B 4A Q3 12 4Y 4B 1 A/B 15 G U357 74ALS158 IA13 2 IA5 +5V +5V C150 .1UF +5V C155 .1UF C210 .1UF 1A 3 IA14 5 IA6 6 IA15 11 IA7 10 IA16 14 IA8 13 /COL 1 +5V C215 .1UF C255 .1UF 2A +5V C257 .1UF C261 .
A5 Microprocessor Board <18> Component Locator CIRCUIT NUMBER A5 Microprocessor Board <18> Component Locator SCHEM LOCATION C177 C185 C187 C264 C265 C285 C455 C476 C480 R370 R455 U165 U167 U367 U375 U453A U453B U475 H4 H4 H4 C2 C2 H4 E5 H4 H4 G1 E4 F3 B3 D1 E1 E5 D5 G1 U476 W475 F1 D1 Y264 D2
PROCESSOR PROGRAM MEMORY LATCH 80C451 ONLY ADC[0..8] W475 0 OHM 43 27 44 26 43 28 11 (top) 60 1 C265 33PF 2 62 61 X1 B5 <16> P0.2 P0.4 X2 C264 33PF (PLCC BOTTOM) P0.0 P0.3 52 1 EA/VP Y264 12MHZ 60 9 9 P0.5 P0.6 P0.7 35 RST P2.1 38 39 40 41 INT0 P2.2 INT1 P2.3 T0 P2.4 T1 P2.5 P2.
A5 Microprocessor Board <19> Component Locator CIRCUIT NUMBER A5 Microprocessor Board <19> Component Locator SCHEM LOCATION C117 C130 C190 C195 C290 C294 C295 C315 C390 C492 C493 C495 C496 C592 C593 G5 G5 G5 G4 G5 G3 H3 D3 G5 D1 D1 G5 G5 D1 D1 CR295 CR394 CR395 G4 H3 H3 DS491 DS492 DS493 DS494 D2 D2 E2 E2 J199 F1 CIRCUIT NUMBER SCHEM LOCATION J495 J595 D2 F1 Q196 Q197 Q391 Q392 H4 H4 H3 G3 R188 R194 R195 R196 R197 R198 R199 R230 R293 R294 R297 R299 R315 R391 R392 R393 R394 F4 G4 G4 G4 G3 G
H2 <16> ID[0..15] ID[0..15] UART G1 <16> IA[0..3] IA[0..
A5 Microprocessor Board <20> Component Locator CIRCUIT NUMBER SCHEM LOCATION C170 C171 C175 C180 C276 C284 C448 C465 C485 C487 C539 C550 C551 C553 C554 C558 C567 C568 C569 C570 C571 C572 B4 G4 G4 G4 G4 G4 G1 G3 G4 G4 H1 G4 G4 G4 G4 H3 F2 E2 E3 E3 E2 F1 CR545 CR546 CR550 CR553 CR564 CR565 H2 H2 G4 G4 H2 H2 CIRCUIT NUMBER SCHEM LOCATION CIRCUIT NUMBER SCHEM LOCATION R170 R171 R437 R438 R445 R461 R536 R537 R538 R539 R541 R545 R546 R547 R555 R556 R557 R558 R559 R563 R564 R565 R566 R567 R572 A4 A4 F1
H2 DATA LATCH <16> ID[0..15] ID[0..
A5 Microprocessor Board <21> Component Locator CIRCUIT NUMBER A5 Microprocessor Board <21> Component Locator SCHEM LOCATION C105 C205 A3 A3 J115 J415 J515 D2 F1 H1 R105 R111 R112 R113 R114 R115 R116 R117 R118 R305 R402 R403 R404 R405 R406 R407 R408 R502 R503 R504 R505 R506 R507 R508 R509 B1 C1 C1 C1 C1 C2 C2 C2 C2 B2 C4 C5 C4 C3 C3 C3 C4 C5 C4 C4 C3 C4 C3 C3 C3 U101 U105 U305 B4 B1 B3
R105 4.7K 1 2 3 4 5 6 7 8 +5V 1 0 9 J415 ED_6 ID[0..15] ID[0..15] DATA TRANSCEIVER ID7 2 ID6 3 ID5 4 ID4 5 ID3 6 ID2 7 ID1 8 ID0 9 19 D4 <16> 1 /DDIN A1 B1 A2 B2 A3 B3 A4 B4 A5 B5 A6 B6 A7 B7 A8 B8 18 16 ED_4 14 12 11 NC 1 ED_0 2 ED_1 +5V 2 C205 .1UF 3 4 5 6 7 8 9 1 0 R508 47.5 R507 47.5 R509 47.5 R505 47.
A10 Microprocessor Annex Board <22> Component Locator CIRCUIT NUMBER COMPONENT NUMBER EXAMPLE A23 A2 R1234 # " !$ A10 Microprocessor Annex Board <22> Component Locator SCHEM LOCATION C207 C211 C230 C329 C525 C534 C3 C3 D3 D3 D5 D5 CR106 CR107 CR108 CR109 CR110 CR111 CR112 CR113 G1 G1 G1 G1 G1 G1 G2 G
RL[0..
COMPONENT NUMBER EXAMPLE A23 A2 R1234 # " !$ A12 Front Switch Panel Board <23> Component Locator CIRCUIT NUMBER DS104 DS106 DS114 DS116 DS124 DS126 DS134 DS136 DS204 DS206 DS214 DS215 A12 Front Switch Panel Board <23> Component Locator SCHEM LOCATION E1 E2 F1 F2 G1 G1 H1 H1 E3 E3 F2 F3 CIRCUIT NUMBER
LEFT DISPLAY RIGHT DISPLAY LEFT DISPLAY RIGHT DISPLAY RL1 3 VECT/ SCH 4 3 X Y/ PIX S105 1 2 4 S115 1 3 PARADE/ OVERLAY 2 1 3 4 S125 FANODE0 4 S135 1 2 2 FANODE4 SCANL6 4 DS104 3 SCANL5 FCATH7 FANODE3 DS114 FCATH7 5 FANODE1 4 1 REF CH A/ PROBE S205 1 CH B1/ CH B2/ CH B3 2 4 S215 1 3 A - B1/ B1 - B2/ B1 - B3 2 4 S225 1 3 INT/ EXT/ CW 2 1 FCATH7 1 FANODE0 8 4 2 FANODE4 4 DS106 3 SCANL4 FCATH6 FANODE3 PIX FCATH5 5 FANODE0 4 WAVEFORM SWEEPS FLA
COMPONENT NUMBER EXAMPLE A23 A2 R1234 # " !$ A3 Touch Front Panel Board <24> Component Locator CIRCUIT NUMBER A3 Touch Front Panel Board <24> Component Locator SCHEM LOCATION CIRCUIT NUMBER SCHEM LOCATION C105 C288 C292 C296 C297 C298 C396 C397 C398 C399 C443 C483 C490 C498 C1 F1 F1 G1 F1 G1 A2 B2 A2
TP_OUT TP_OUT SL[0..3] +5V +5V +5V +5V Q113 Q120 Q128 X4 X5 X6 X7 +5V DS106 3 +15V IN G C396 .1UF C399 10UF Q143 X0 TCATH0 1 OUT +5V DS206 C397 .1UF 2 +5V TANODE2 TANODE2 2 -15V C498 .1UF 1 G IN OUT 3 15 X3 12 X4 1 X5 5 X6 2 X7 4 SL0 11 SL1 10 9 6 X 3 X1 R292 1K X2 X3 CR291 D-0141 TANODE2 C297 .1UF X7 A B VCC C GND INH VEE 16 2 -15V +5V IN DS420 6 SCANL3 4 6 3 DS428 DS436 PRESET 1 RL3 C443 .
COMPONENT NUMBER EXAMPLE A23 A2 R1234 # " !$ A6 Vectorscope Board
A6 Vectorsope Board <25> Component Locator SCHEM LOCATION CIRCUIT NUMBER C183 C184 C185 C188 C190 C288 C290 C292 C294 C464 C471 C474 C483 C484 C486 C562 C570 C571 C573 C576 C582 C682 F4 G4 G4 F5 F5 G4 E4 E5 F5 F2 E2 E2 H3 H3 H3 F1 E3 E3 E3 D2 B5 B5 CR467 CR468 E1 E1 J574 J885 D3 A1 L287 G4 Q186 Q187 Q290 Q291 Q459 Q462 Q467 Q468 Q560 Q573 F4 F4 E4 E4 G2 G1 E1 E1 G1 E3 R287 R289 R292 R293 R294 R389 R458 R460 R461 R462 R463 R465 R468 R469 R470 R471 R472 R475 R477 R561 R562 R563 R564 R565 R566 R567
A6 Vectorscope Waveforms and J885 Connections
+12V +12V R469 4.32K GAIN CELL R477 619.0 +12V VR577 6.
A6 Vectorscope Board <26> Component Locator CIRCUIT NUMBER SCHEM LOCATION C131 C156 C157 C162 C165 C166 C171 C172 C257 C264 C273 C277 C357 C358 C360 C365 C369 C373 C377 C383 C481 C482 C676 D5 E1 E1 F2 F3 F3 D4 D4 D2 E5 G3 G3 C2 C2 C3 D3 G4 H3 H4 G5 C4 C5 A3 Q158 Q159 Q160 Q167 Q265 Q277 Q278 Q279 Q677 E1 E2 F2 F3 D3 G3 C2 C5 B3 R130 C5 CIRCUIT NUMBER R133 R155 R156 R157 R158 R159 R160 R161 R162 R163 R164 R165 R166 R167 R170 R173 R257 R258 R263 R264 R270 R271 R272 R273 R274 R275 R276 R277 R278 R280
C156 .1UF +12V R157 499.0 R158 499.0 R156 150.0K C157 51PF 1 Q158 Q-0261 2 H1 DIFFERENTIAL GAIN DEMODULATOR 1 <25> C357 .01UF CURRENT MIRROR 4 5 3 R155 1.00K 6 R257 100.0 AMP_CHROMA R357 1.00K C358 .01UF U261 1496P 6 1 2 8 R258 100.0 4 R358 1.00K 1 3 5 C162 10UF R359 200.0 +12V 2 R161 4.99K 1 4 R281 1.00K R278 5.62K A2 <25> R361 100.0 R159 4.99K Q677 Q-0188 C360 .01UF R675 15.0K R362 499.
A6 Vectorscope Board <27> Component Locator CIRCUIT NUMBER SCHEM LOCATION C324 C330 C350 C351 C420 C421 C450 C454 C456 C457 C521 C554 C555 C648 C659 C660 C661 C664 C693 C695 C747 C753 C756 C758 F5 F5 F2 E2 B4 B4 F3 E2 E2 G2 B4 F2 E2 F5 F3 G3 G3 H3 F5 C5 F5 F5 A1 A1 J321 C4 L659 G3 P321 C4 Q323 Q447 B4 F2 CIRCUIT NUMBER SCHEM LOCATION Q663 Q665 G3 H3 R234 R322 R323 R324 R349 R350 R351 R352 R425 R426 R427 R428 R446 R447 R448 R453 R455 R456 R547 R548 R549 R550 R551 R552 R553 R554 R647 R663 R664
+5V C756 .1UF D4 <28> 1 3 AFSC1 4 AFSC2 6 C758 .1UF U757 LM361 +12V +5V +V STB1 IN1 OUT1 IN2 OUT2 -V STB2 13 +5V R748 1.00K A4 R753 1.00K <25> R856 100.0 11 J885-43 SUBCURSE 9 A4 8 1 R857 100.
A6 Vectorscope Board <28> Component Locator CIRCUIT NUMBER SCHEM LOCATION C116 C118 C120 C126 C136 C137 C140 C221 C225 C238 C336 C339 C341 C438 C443 C538 C641 C645 C738 C742 C744 C839 C843 C848 C849 C850 C851 C852 E1 G2 G2 F3 D2 C1 C2 G2 G2 B1 C5 C5 D5 B5 D3 F5 E3 D2 G4 G4 D3 G4 G4 D4 C4 D4 C4 C4 CR236 CR237 CR436 CR437 CR443 CR444 C2 C2 C5 C5 E3 E3 Q122 Q135 Q223 Q239 Q342 Q645 G1 D1 H2 B1 D5 C2 CIRCUIT NUMBER SCHEM LOCATION Q739 Q742 Q743 Q841 Q847 G3 D3 C2 H4 C2 R114 R117 R118 R121 R122 R123
E2 <27> 1 VERTICAL VECTOR CENTER DOT POSITION CLAMP R241 6.81K Q239 Q-0188 /CENTER_DOT_CLAMP R141 22.1K R240 47.5K -12V +12V A4 <25> R238 8.25K J885-45 C137 .1UF VECT_V_POS C238 .01UF +12V U138 3080E 7 C1 D-0141 CR237 R235 10.0K <30> 6 2 CR236 D-0141 Q-1025 Q135 5 3 4 VERT_CLAMP_FB D G C140 .1UF R–Y LOWPASS FILTER R114 100.0 C116 22UF +12V R237 604.0 +12V R117 1.24K R123 1.00K R134 3.32K S R121 100.0 Q122 +12V Q-0190 C136 .1UF +12V C120 110PF R118 5.
A6 Vectorscope Board <29> Component Locator CIRCUIT NUMBER A6 Vectorscope Board <29> Component Locator SCHEM LOCATION C105 C110 C205 C208 C213 C305 C401 C404 C503 C605 C672 C673 C761 C861 C4 C4 C5 G4 G4 C3 D2 G4 C1 G4 G3 G3 G3 G3 CR671 CR672 CR860 CR861 H3 G3 G3 H3 J100 J108 J205 A5 C4 C5 Q403 Q602 C2 C1 R104 R106 R107 R109 R110 R111 R112 R113 R204 R205 R206 R207 R212 R213 R214 C4 C4 C4 C4 C4 C4 D4 D4 C5 C5 C5 D5 E4 E4 D4 CIRCUIT NUMBER SCHEM LOCATION R215 R304 R306 R307 R308 R309 R310 R311 R
E5 R601 10.0K <27> PICTURE MONITOR SWEEPS Q602 H_SYNC_A C503 .01UF R506 20.0K +12V 4V P-P U506A TL074 4 2 3 R603 10.0K 6 R605 49.9K 1 1 ~7V P-P ~ U506B TL074 E4 0V <30> 7 5 PIX_HORIZ R501 10.0K -12V R604 20K PIX HORIZ GAIN R602 10.0K 1 R606 100K +12V PIX HORIZ POS -12V R407 100K -12V PIX VERT POS A3 <25> R402 10.0K J885-30 R405 49.9K R502 750.0K Q403 V_SYNC R406 20.0K C401 .1UF 13 R403 392.
A6 Vectorscope Board <30> Component Locator CIRCUIT NUMBER SCHEM LOCATION C146 C148 C150 C153 C216 C218 C243 C248 C249 C251 C318 C319 C343 C344 C346 C411 C412 C417 C529 C530 C537 C614 C627 C632 C634 C703 C733 C735 C803 C805 C818 C819 C832 C835 C5 D5 D5 C4 B1 B1 B5 B5 B5 C5 B1 B1 E5 E5 F5 E2 E2 F2 E4 E4 F4 G2 G4 B2 B4 C1 B3 C3 D1 C1 H2 H3 B3 C3 Q145 Q246 Q515 Q516 Q526 Q527 Q611 Q617 Q623 C5 B4 G2 F3 G4 F4 F2 G2 F4 CIRCUIT NUMBER SCHEM LOCATION Q628 Q710 Q719 Q723 Q730 G4 F2 G2 F4 G4 R144 R147 R148
R218 5.62K R804 1.00K C218 *SEL R–Y AMPLIFIER C805 22PF +12V H2 1 <28> C703 .1UF R802 1.50K C216 .1UF U216 R219 499.0 EL2020 2 DEMOD_R-Y R317 332.0 1 5 4 R316 100.0 +12V A2 U803 LM6361 R806 2.00K 6 3 R315 1.10K C319 .1UF 8 7 R–Y BUFFER 2 7 2 R803 909.0 B2 -12V VEC_R-Y C803 .1UF 4 1 8 <28> VERTICAL SWITCHING J885-17 6 3 C318 .1UF <25> <25> VERT_CLAMP_FB (0 +/- 2.5V) -12V 1 2 J885-36 C632 .001UF R833 1K <25> R831 2.
COMPONENT NUMBER EXAMPLE A23 A2 R1234 # " !$ A7 Oscillator Board
A7 Oscillator Board <31> Component Locator CIRCUIT NUMBER C167 C173 C174 C177 C178 C179 C180 C182 C186 C187 C190 C191 C193 C196 C273 C276 C279 C280 C281 C282 C283 C285 C286 C287 C288 C289 C290 C291 C292 C293 C294 C297 C298 C369 C372 C374 C382 C383 C387 C392 C393 C394 C395 C396 C477 C483 C487 C495 C496 C593 SCHEM LOCATION F1 A3 F1 E1 G1 F1 F1 F1 A3 C1 C3 E1 C1 C1 F2 B3 E3 D3 E1 E1 A3 D1 A3 A4 A4 C2 C2 B4 C4 B3 B3 A3 A1 A3 E4 C3 D3 G3 C4 B2 B3 B5 B4 C5 B3 F3 C4 A4 B5 B4 CIRCUIT NUMBER SCHEM LOCATION C59
A7 Oscillator Board Waveforms
+12V BANDPASS FILTER J499 CONNECTS TO J1446 H4 <4> J499 1 2 C298 100UF R188 432.0 R292 100.0 R184 523.0 R287 1.54K 7 1 2 R296 1.62K C392 220PF R390 100.0 R397 909.0 CR283 W198 0 OHM -12V 5 R187 47.5 -12V C290 .1UF 1780R 1781R C392 220PF 170PF C394 100PF 77PF R267 4.75K OUT IN W480 OUT IN Y182 14.31818MHZ +12V C283 .1UF R289 6.19K +12V C286 .1UF +12V +5A +5A C173 .1UF C186 .1UF <34> C276 .1UF -12V R X C X 9 Q A 10 C L B Q U376B 74HC221 R280 100.
A7 Oscillator Board <32> Component Locator CIRCUIT NUMBER C151 C153 C155 C156 C161 C228 C246 C248 C249 C250 C252 C253 C256 C260 C327 C334 C338 C340 C343 C344 C348 C349 C352 C354 C356 C357 C358 C359 C360 C361 C362 C363 C364 C365 C366 C367 C368 C434 C435 C436 C437 C438 A7 Oscillator Board <32> Component Locator SCHEM LOCATION G4 B2 A2 A2 A1 G4 G4 C2 C2 C2 B2 G2 A2 G1 H4 G5 H4 F4 G4 G4 H3 C2 G2 G3 E2 F3 G1 G1 G1 G1 H4 H4 C1 G1 C1 C1 C1 G5 F2 F2 G2 F1 CIRCUIT NUMBER SCHEM LOCATION C439 C440 C441 C452 C45
MIXER +5A U161A 74F74 2 3 4 P R D 5 Q CK C L 4 1 FSC 1 U266A 4 74F86 3 2 R266 2.21K C367 .022UF 1 0 5 <31> 8 12 U256D 74F86 C364 330PF 2 10 U263B LM319 U445 74F175 8 4 F4 +5A 9 <31> D1 5 2 Q1 C155 267PF /Q_INVERT PHASE DETECTOR 10 12 U256C 74F86 Q3 Q3 13 8 9 1 +5A D4 Q4 Q4 CLK C250 .1UF C156 267PF Y253 14.31619MHZ C153 100PF R152 118.0K Q155 Q-0221 R254 6.19K R151 274.0 C252 2-18PF CR152 D-0269 + DELTA F CENTER FREQ TP149 U349A TL072 1 6 C349 .
A7 Oscillator Board <33> Component Locator CIRCUIT NUMBER A7 Oscillator Board <33> Component Locator SCHEM LOCATION CIRCUIT NUMBER SCHEM LOCATION C131 C133 C139 C142 C143 C144 C149 C165 C202 C203 C206 C207 C209 C210 C212 C226 C259 C261 C302 C303 C304 C306 C307 C308 C311 C350 C408 C412 C413 C414 C415 C416 C513 A5 B5 C5 B5 F5 A5 B5 F5 E2 E2 E2 F5 C5 E1 C5 F5 D5 D5 F2 A2 D3 B3 B1 B3 D1 F5 B3 D2 C1 D2 D2 F5 C1 R200 R203 R209 R210 R211 R212 R225 R303 R304 R305 R307 R308 R309 R310 R311 R313 R405 R406 R407
C307 .1UF +12V +12V R410 332.0 ERROR AMPLIFIER R409 332.0 Q-0221 Q409 Q408 R413 4.02K D-0141 CR303 C303 1UF 1 U407D CA3046 5 2 REF_SYNC Q-0188 Q411 4 R304 100.0 R303 1.00M U415A TL072 3 R415 1.82K R405 3.92K C210 33PF C414 .1UF 4 C412 1UF Q412 3 PHASE DETECTOR U407C CA3046 U407A 8 CA3046 1 4 1 4 1 -12V U307B 74HCU04 3 R305 825.0 U307C 74HCU04 4 2 R509 1.21K +5A 22 NC 21 NC 20 NC 19 NC 18 NC 17 NC 16 NC U307D 74HCU04 U307E 74HCU04 8 11 R407 1.
A7 Oscillator Board <34> Component Locator CIRCUIT NUMBER SCHEM LOCATION C219 C225 C227 C320 C417 C418 C419 C433 E4 E4 E4 F4 H1 H1 H1 C4 J115 J320 A2 D1 P320 D1 Q322 F2 R213 R214 R314 R315 R317 R318 R319 R320 R321 R322 R323 R324 R417 R418 R420 E2 E1 E1 F4 E2 F2 F4 F4 F4 E4 F1 D4 H1 G1 F2 A7 Oscillator Board <34> Component Locator CIRCUIT NUMBER SCHEM LOCATION R421 R422 R423 R424 R426 R427 R428 R429 R430 R433 G2 H2 F2 G2 F1 F1 F1 G1 G1 C4 U217A U217B U217C U217D U221A U221B U243 U246B U246C
SWITCH CONTROL -REF_H_SYNC 3 P R D Q CK C L P320 U417A 74LS74 4 2 +5A J320 DIFF. PHASE DISPLAY +5A Q 12 1 2 3 5 +12V U417B 74LS74 1 0 1-2 DOUBLE 2-3 SINGLE J320 ALTERNATE MODE SWITCH 11 6 D P R Q CK C L Q R426 4.75K 9 R430 750.
COMPONENT NUMBER EXAMPLE A23 A2 R1234 # " !$ A15 Filter Board
A15 Filter Board <35> Component Locator CIRCUIT NUMBER C100 C110 C111 C130 C140 C141 C150 C151 C160 C161 C170 C171 C180 C181 C210 C211 C212 C220 C300 C310 C311 C312 C320 C321 C322 C350 C400 C410 C411 C420 C430 C440 C441 C450 C460 C461 SCHEM LOCATION H3 G2 H2 A1 A1 A1 B1 B1 A1 A1 A1 A1 A1 B1 G2 G2 G1 G1 G3 H3 H1 H1 H1 H2 A1 B1 B1 A1 G4 G4 A1 A1 A1 B1 A2 A2 CIRCUIT NUMBER SCHEM LOCATION CIRCUIT NUMBER SCHEM LOCATION C470 A2 CR300 CR310 G3 H3 J310 J380 A1 A3 L210 L420 L421 H3 G4 G4 Q310 Q320 R2
A15 Filter Board Waveforms and J310 Connections
FLTR_DEMOD DEMOD FLTR_DEMOD +5VA C[0..7] 1 J310 1 2 3 4 5 6 7 8 9 10 11 J310 CONNECTS TO J516 A11 INTERCONNECT BOARD 12 13 14 15 H1 16 <44> 17 18 NOTE: SEE TABLE 35 FOR SIGNAL ORIGIN OR DESTINATION 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 SUBTRACTOR DEMOD 1 U470F 74F04 2 M4 13 3 12 U470B 74F04 FLTR_DEMOD 4 5 NC 6 NC 7 M5 4 3 U470C 74F04 -8V M6 +5VA 8 6 5 U470E 74F04 9 10 M7 11 R410 1.
COMPONENT NUMBER EXAMPLE A23 A2 R1234 # " !$ A4 Z–Axis Board
A4 Z–Axis Board <36> Component Locator CIRCUIT NUMBER SCHEM LOCATION C164 C165 C197 C264 C265 C289 C291 C293 C299 C384 C385 C390 C391 C397 C399 C598 G3 G3 G1 H3 H3 G4 E2 H4 G1 E4 C4 B2 D1 F2 G1 F1 CR296 CR394 CR395 CR481 CR498 CR597 H2 D2 E2 C5 F2 B2 DS195 DS196 H1 H1 Q199 Q298 Q380 Q381 Q498 Q499 G1 G1 B4 C5 G2 G2 R194 R195 R196 R197 R280 H1 G1 G1 G1 B4 CIRCUIT NUMBER R291 R292 R293 R294 R296 R298 R380 R381 R382 R383 R384 R385 R386 R387 R388 R390 R391 R392 R393 R394 R395 R396 R397 R398 R399 R4
A4 Z–Axis Board Waveforms
WAVEFORM Z–AXIS AMP +100V R196 475.0 +100V C197 .1UF R197 2.00K R195 100.0K Q199 WAVEFORM Z–AXIS 23 9 /WFM_BLANK A3 10 <38> J180 28 30 C3 4 /RY_SCH_BLNK R298 51.1 J156-1 DS195 Q298 R391 4.75K U357B 74HC32 +12V C391 47PF R396 8.06K 6 5 <38> WFM_Z-AXIS R398 2.00K C399 .1UF A1 1 R194 100 13 WLS_LINE <40> +12V /CURSOR_LOCATE HI = BLANK 8 C598 .1UF R599 15.0K <38> U289B 74ALS20 12 W_BLANK_EN 1US H2 C397 .1UF C299 .01UF R399 475.0 DS196 Q498 R397 5.
A4 Z–Axis Board <37> Component Locator CIRCUIT NUMBER A4 Z–Axis Board <37> Component Locator SCHEM LOCATION C100 C101 C102 C104 C108 C109 C110 C112 C113 C115 C116 C118 C120 C206 C207 C211 C214 C215 C218 C219 C302 C303 C305 C306 C307 C311 C312 C313 C314 C402 C403 C404 C412 C414 C416 G1 G1 H4 H1 C2 H1 H1 B4 C2 B2 B2 E4 E4 F2 C3 B4 B2 C2 D4 E5 E2 E2 F2 H4 A3 B4 C2 C4 C5 E1 D2 D2 B3 C5 D4 CR204 CR214 CR306 CR307 CR310 CR311 CR312 CR402 CR403 F1 C2 C3 A2 B4 B4 B4 E1 F2 L115 B2 Q100 Q204 Q214 Q311 Q407 Q
+12V R100 511.0 PHASE DETECTOR R106 392.0 C100 300PF +12V 10MHZ OSCILLATOR C402 .001UF +5V D-0141 CR307 R113 200.0 H2 <38> C214 100PF R307 100.0K LOW = GO C215 .1UF C113 10UF /CLK_RUN CR214 Q214 L115 .7-.94UH ADJUST L115 SO THAT TP100 IS AT +8V AT ROOM TEMPERATURE CURSOR CLOCK CENTERING +5V R309 2.00K C116 .001UF +12V R314 15.0K D-0269 Q-0190 TP100 FREQ CONTROL U302B TL072 U406A DG211 6 7 5 C312 33PF 1 2 3 C403 1UF C404 .
A4 Z–Axis Board <38> Component Locator CIRCUIT NUMBER A4 Z–Axis Board <38> Component Locator and J180 Connections SCHEM LOCATION C133 C136 C139 C143 C217 C220 C223 C320 C323 C327 C329 C333 C336 C339 D5 E5 E5 E5 F4 E5 F5 F5 F5 G5 G5 F5 G5 G5 J156 J180 A1 A1 R217 F4 U218B U223A U223B U233 U236 U239 U243 U329 U333 U336 U339 U420A U423 U426 U429A U429B F4 D5 G3 D4 D2 D3 D1 C4 E2 E3 E4 G4 G4 G1 F1 G3
J156 CONNECTS TO J550 A16 WAVEFORM HIGH VOLTS BOARD CURSOR VS SWEEP SYNCHRONIZATION & CURSOR ENABLE J156 3 2 1 CURSOR CURSOR 3 2 W_FOCUS 1 WFM_Z-AXIS A4 <39> <36> F1 H1 DIGITAL DELAY <42> U243 74LS374 J180 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 J180 CONNECTS TO J492 A11 INTERCONNECT BOARD A1 <45> 26 27 28 29 30 31 32 NOTE: SEE TABLE 38 FOR SIGNAL ORIGIN OR DESTINATION 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 1 2 -15V
A4 Z–Axis Board <39> Component Locator CIRCUIT NUMBER A4 Z–Axis Board <39> Component Locator SCHEM LOCATION C148 C151 C250 C251 C343 C346 C348 C350 C351 C352 C353 C354 C355 C357 C440 C444 C452 C453 C454 C455 C456 C489 C551 C555 C557 C586 C587 C588 C591 C592 A2 B2 A1 G1 A1 B2 B2 G3 G1 G3 B1 E1 E1 B1 B1 B2 G2 G2 E2 E2 G4 B1 B1 G4 B1 E4 E4 B1 E3 E3 R346 R440 R441 R442 C3 C3 C3 C4 CIRCUIT NUMBER SCHEM LOCATION R443 R444 R446 R456 R457 R458 R558 B2 B2 B3 E3 E2 E2 E2 U248 U251 U343A U343B U346 U348 U35
ANALOG MULTIPLEXERS +12V A1 4 +12V +12V C343 .1UF -12V +12V +12V C353 .1UF -12V W_FOCUS 5 <38> J180-60 7 VECT_V_POS 1 1 +12V C489 .1UF A5 U355B TL074 6 C351 .1UF +12V -12V +12V C440 .1UF J156-2 1 2 -12V +12V C357 .1UF 3 C355 .1UF C588 .1UF -12V +12V C250 .1UF +12V C557 .1UF <38> U451A TL074 12 C551 .1UF C354 .1UF 4 <38> J180-40 14 13 A5 A4 U451D TL074 V_FOCUS 3 C251 .1UF <38> U355A TL074 J180-59 1 2 VECT_H_POS 1 1 -12V +5V +5V C148 .1UF +5V C151 .
A4 Z–Axis Board <40> Component Locator CIRCUIT NUMBER A4 Z–Axis Board Board <40> Component Locator SCHEM LOCATION C226 C263 C267 C269 C272 C361 C364 C366 C369 C372 C463 C469 C476 C478 C566 C571 C578 A5 G1 G2 G3 G4 A4 F1 F2 F3 F4 A5 A5 D2 A5 A5 B5 B5 CR466 CR467 CR472 CR473 F1 F2 F3 F3 L261 A4 Q362 Q363 Q365 Q366 Q369 Q370 Q371 Q372 Q374 Q375 Q377 Q378 G1 G1 G2 G2 G3 G3 G4 G3 F5 F5 D5 D5 R264 G1 CIRCUIT NUMBER SCHEM LOCATION R270 R276 R277 R364 R367 R370 R373 R374 R375 R377 R378 R463 R464 R465
PULSE WIDTH MODULATORS +12V H4 R465 14.3K R464 4.75K <39> 5 V_SCALE_INTENS U466B TL074 +15VA 7 6 R463 18.2K SCALE DRIVERS R264 47.5K +12V R466 10.0K 4 3 R364 332.0 1 C364 10UF Q-0710 VECT EXT/INT U466C TL074 10 +2.5V Q362 Q-0622 <38> J180-13 A2 -12V <38> J180-20 8 9 VECT_SCALE_GND +15VA CR467 D-0141 R467 10.0K DATA LATCH C263 100UF VECT_INT_LAMP 1 1 CR466 D-0141 A2 Q363 U466A TL074 2 +15VA 12 TRIANGLE GENERATOR U466D TL074 R367 332.
COMPONENT NUMBER EXAMPLE A23 A2 R1234 # " !$ A3 Vector High Volts Board <41> Component Locator CIRCUIT NUMBER C100 C101 C102 C110 C111 C112 C120 C130 C200 C210 C211 C230 C260 C261 C262 C263 C264 C280 C300 C311 C320 C321 C350 C351 SCHEM LOCATION C3 F3 F3 C2 B3 B2 B2 A3 F4 C4 B3 B1 D1 C2 D2 E2 D2 E2 B5 C4
HV SUPPLY INDICATOR CR151 DS340 2 IN HV CONNECTOR OUT 33KHZ OSC +9KV 3 G 1 5 T240 16 POWER SUPPLIES R161 15 J156 WIRE COLOR CODES GRID DRIVE RECTIFIER J160 J155 4 15 3 11 R162 47K C230 .01UF CR150 L110 100UH R102 4.7 8 -2750V 7 1 1 R222 15 R460 1K R461 47 R171 1.5M CR170 4 4 HIGH VOLTAGE AREA R170 22M R182 2.5M 1 FOCUS ERROR AMP C112 .1UF +15V C110 10UF -15V 2 R120 330 NC 8 7 6 C130 .1UF C460 270PF R221 5.1K U210 741 R111 330 P–P CLAMP +5A C211 .
A16 Waveform Hi Volts Board <42> Component Locator CIRCUIT NUMBER C100 C101 C102 C110 C111 C113 C120 C121 C210 C230 C231 C240 C241 C242 C243 C250 C251 SCHEM LOCATION B1 F4 F4 B2 B2 F4 F3 F3 B2 C1 D1 D2 D2 D1 D2 E3 E3 CIRCUIT NUMBER C300 C365 C410 C411 C419 C420 C430 C500 C510 C511 C512 C513 C530 C531 C532 C533 C534 SCHEM LOCATION A2 E5 A1 A1 C2 E4 D3 A3 C3 C3 C2 D3 A4 A2 A2 B4 B3 CIRCUIT NUMBER SCHEM LOCATION C540 C560 C561 C562 A3 B4 B5 C4 CR140 CR141 CR220 CR360 CR440 CR450 CR451 CR460 CR461 C
U220 C100 10UF L200 100UH R200 4.7 +60V 2 25KHZ OSC T-1765 T210 3 IN OUT J130 +16KV 3 G 1 16 POWER SUPPLIES 5 DS300 11 D-0409 CR220 R300 15 2 R320 10.0K C419 1UF Q300 +5V Q300 +5V +5V Q111 R311 2.21K R110 2.21K C210 10UF Q110 C531 .1UF C +5V C540 10UF C500 .47UF R500 332.0 R501 332.0 U540 LF351 CR530 D-0141 1 R540 20.0K C250 .001UF R121 33K +125V 1 2 C121 .1UF 3 NC C251 .001UF 4 5 DS441 L-0035 6 C534 470PF R442 59.
A1 Low Volts Board <43> Component Locator CIRCUIT NUMBER C100 C120 C121 C130 C132 C134 C135 C140 C141 C160 C170 C234 C240 C260 C270 C271 C300 C301 C310 C320 C321 C340 C350 C360 C361 A1 Low Volts Board <43> Component Locator SCHEM LOCATION G3 F4 F4 F3 D5 E5 E5 D5 E2 C1 C1 E5 E2 A5 D1 D1 F3 G3 A1 F2 F1 E1 D3 A4 D4 CIRCUIT NUMBER SCHEM LOCATION CIRCUIT NUMBER SCHEM LOCATION C400 C410 C411 C412 C420 C421 C450 C461 C462 C463 C540 C560 C561 C576 F3 F2 F1 F2 F1 F2 D3 B4 C3 B3 C2 B3 A2 D1 CR321 CR350 CR3
R300 LINE RECTIFIER AND FILTER 5 OHM COLD R300 F210 BROWN T 2A o CR103 J281 CR102 C310 .068UF R200 BLUE T E210 230V o R270 470K R201 680K C270 .022UF C160 680UF J345 o 100UF SNUBBER R271 470K CLOSED 110V OPEN 220V CR100 CR140 C271 .022UF C170 680UF L421 47UH CR520 3 J180 R140 W520 0 OHM NC R574 R572 365.
COMPONENT NUMBER EXAMPLE A23 A2 R1234 # " !$ A11 Interconnect Board <44> Component Locator CIRCUIT NUMBER J303 J308 J516 J531 J547 J565 A11 Interconnect Board <44> Component Locator SCHEM LOCATION E1 D1 H1 A1 A3 H3
WAVEFORM FILTER VECTORSCOPE - FILTER J531 1 2 3 4 5 6 7 8 9 10 11 12 13 14 J531 CONNECTS TO J130 A2 WAVEFORM BOARD A1 <12> 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 J516 1 V_RO_DATA_WFM 2 /W_RO_EN 3 <46> <46> WAVEFORM - OSCILLATOR J375-7 2 3 <46> +5V J375-9 4 VECT_GAIN 6 VECTORSCOPE /ERSTO 7 ED_5 8 9 FIELD_1 ED_6 10 <46> J380-17 SYNC_OSC2 11 ED_7 12 SYNC_OSC1 13 ED_3 14 ALT_DEMOD 15 ED_2 16 ED_7 1 ED_6 2 ED_5 3 ED_4 4 ED_3 5 ED_2 6 ED_1
A11 Interconnect Board <45> Component Locator CIRCUIT NUMBER SCHEM LOCATION A11 COMPONENT NUMBER EXAMPLE A23 A2 R1234 # " !$ J116 J133 J143 J150 J165 J492 J497 D1 D4 D3 D2 D4 A1 H1 S100 F5 A13 DS111 DS121 DS131 DS141 DS151 E2 E1 E2 E1 E2 P116 D1 S131 E1 A14 A11 , A13, and A14 Boards <45> Compo
J116 J375-39 J375-42 <46> J375-43 J380-49 1 SC3 2 LED_R1 3 SW_R1 4 LED_COL Z–AXIS VECT_SCALE_GND 5 VECT_EXT_LAMP 6 VECT_INT_LAMP 7 P116 1 1 2 2 3 3 4 4 5 5 6 6 7 7 1 SC3 2 LED_R1 3 SW_R1 4 LED_COL 5 VECT_SCALE_GND 6 VECT_EXT_LAMP 7 VECT_INT_LAMP 3 4 6 1 2 5 S131 LOW VOLTAGE POWER SUPPLY J492 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 J492 CONNECTS TO J180 A4 Z-AXIS BOARD A1 <38> 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42
A11 Interconnect Board <46> Component Locator CIRCUIT NUMBER A11 Interconnect Board <46> Component Locator SCHEM LOCATION J375 J380 A1 H1 R109 R123 R127 R138 R158 R185 R191 R198 E2 E3 E3 E4 E4 D4 D4 D3
MICROPROCESSOR MICROPROCESSOR J375 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 J375 CONNECTS TO J415 A5 MICROPROCESSOR BOARD F1 <21> 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 J380 1 W_RO_BLNK J492-16 2 3 V_RO_BLNK 4 5 H_RO_DATA_WFM <44> J547-21 6 2 4 <45> J492-57 V_RO_DATA_WFM 8 9 NC <45> SEG_INTENS 12 13 NC 14 NC 15 NC <44> J303-35 J308-11 J531-7 /ERSTO 11 <44> J531-1 J303-58 J531-33 J565
Mechanical Parts List This section contains a list of the replaceable mechanical components for this instrument. Use this list to identify and order replacement parts. Parts Ordering Information Replacement parts are available through your local Tektronix, Inc., Field Office or representative. Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest circuit improvements.
Mechanical Parts List Using the Replaceable Mechanical Parts List Table 10–1 describes each column in the replaceable parts list. Table 10–1: Replaceable parts list column descriptions Cross Index–Mfr. Code Number to Manufacturer Abbreviations Instrument Accessories 10–2 Column Name Description Fig. & Index Number Items in this column are referenced to the exploded view item numbers. Tektronix Part Number Use this part number when ordering replacement parts from Tektronix. Serial No.
Mechanical Parts List Manufacturers Cross Index Mfr.
Mechanical Parts List Replaceable Parts List Fig. & Index Number Tektronix Part Number Serial No. Effective Serial No. Discont’d Qty Name & Description Mfr. Code Mfr. Part Number 1–1 426–2293–00 2 FRAME,CRT:ASSY,INNER BEZEL/IR FILTER 80009 426–2293–00 –2 378–0332–00 2 FILTER:SMOKE GRAY 80009 378–0332–00 –3 378–0338–00 2 FILTER,CLEAR:4.146 X 3.376,ACRYLIC 80009 378–0338–00 –4 366–0649–00 8 KNOB:GY,0.127 ID X 0.392 OD X 0.
Mechanical Parts List Replaceable Parts List (Cont.) Fig. & Index Number Tektronix Part Number –25 Serial No. Effective Serial No. Discont’d Qty Name & Description Mfr. Code Mfr. Part Number _____ _____ 1 CIRCUIT BD ASSY:FUSE (SEE A17 REPL) –26 129–1308–00 2 SPACER,POST:6–32 X 0.75,HEX,STL,CAD PL 80009 129–1308–00 –27 211–0721–00 2 SCREW,MACHINE:6–32 X 0.375 PNH,STL 83486 ORDER BY DESCR 198–5665–01 1 WIRE SET,ELEC,1780R,AC WIRE,3,22AWG,6.
Mechanical Parts List Replaceable Parts List (Cont.) Fig. & Index Number Tektronix Part Number –44 211–0721–00 Serial No. Effective Serial No. Discont’d Qty Name & Description Mfr. Code Mfr. Part Number 13 SCREW,MACHINE:6–32 X 0.375 PNH,STL 83486 ORDER BY DESCR 80009 337–3549–00 83486 ORDER BY DESCR *END MOUNTING PARTS* –45 337–3549–00 1 SHIELD,ELEC:POWER SUPPLY, ALUMINUM –46 211–0721–00 3 SCREW,MACHINE:6–32 X 0.
Mechanical Parts List Replaceable Parts List (Cont.) Fig. & Index Number Tektronix Part Number –67 _____ _____ Serial No. Effective Serial No. Discont’d Qty Name & Description 1 FAN,TUBE AXIAL:12V, 1.56W,37CFM,80 MM, W/SOLID MOUNTING FLANGES (SEE B1 REPL) Mfr. Code Mfr. Part Number 83385 ORDER BY DESCR TK2058 ZUB2203–00 93907 ORDER BY DESCR *MOUNTING PARTS* –68 211–0530–00 2 SCREW,MACHINE:6–32 X 1.
Mechanical Parts List Replaceable Parts List (Cont.) Fig. & Index Number Tektronix Part Number –85 337–3581–00 Serial No. Effective Serial No. Discont’d Qty Name & Description Mfr. Code Mfr. Part Number 1 SHIELD,ELEC:HIGH VOLTAGE TRANSFORMER 80009 337–3581–00 83486 ORDER BY DESCR 80009 253–0415–00 *MOUNTING PARTS* –86 211–0721–00 2 SCREW,MACHINE:6–32 X 0.375 PNH,STL –87 253–0415–00 1 TAPE,FOAM:1 X 1.5 X 0.
Mechanical Parts List Replaceable Parts List (Cont.) Fig. & Index Number Tektronix Part Number –107 –108 Serial No. Effective Serial No. Discont’d Qty Name & Description _____ _____ 1 CIRCUIT BD ASSY:VERT/HORIZ (SEE A2 REPL) 211–0721–00 10 SCREW,MACHINE:6–32 X 0.375 PNH,STL Mfr. Code Mfr. Part Number 83486 ORDER BY DESCR *MOUNTING PARTS* *END MOUNTING PARTS* –109 255–0249–01 2 PLASTIC CHANNEL:11.25 L,VINYL 80009 255–0249–01 255–0249–02 2 PLASTIC CHANNEL:14.
Mechanical Parts List Replaceable Parts List (Cont.) Fig. & Index Number Tektronix Part Number 2–1 390–1039–00 Serial No. Effective Serial No. Discont’d Qty Name & Description Mfr. Code Mfr. Part Number 1 CAB,WRAPAROUND:1780R 80009 390–1039–00 0KB01 211–0720–01 80009 407–3752–00 *MOUNTING PARTS* –2 211–0720–01 4 SCREW,MACHINE:6–32 X 0.50 PNH,STL,TORX T–15 *END MOUNTING PARTS* CABINET,WRAPAROUND INCLUDES: –3 407–3752–00 2 BRACKET,EXT:2.5 X 8.06 X 0.
Mechanical Parts List Replaceable Parts List (Cont.) Fig. & Index Number Tektronix Part Number Serial No. Effective Serial No. Discont’d Qty Name & Description Mfr. Code Mfr.
Mechanical Parts List 10–12 1780R-Series Service Manual
1780R–Series Figure 1 Exploded View
1780R–Series Figure 2 Cabinet & Accessories
