Service Manual TDS3000 Series Digital Phosphor Oscilloscopes 071-0382-01 This document supports firmware version 2.00 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.
WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of three (3) years from the date of shipment. If any such 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii xi xiii Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1 Transporting the Oscilloscope . . . . . . . . . . . .
Table of Contents Maintenance Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preventing ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inspection and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Removal and Installation Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Troubleshooting . . . . . . .
Table of Contents List of Figures Figure 3–1: TDS3000 series block diagram . . . . . . . . . . . . . . . . . . . . . 3–1 Figure 6–1: Pulling the hub pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6–2: Releasing the hub assembly . . . . . . . . . . . . . . . . . . . . . . . . Figure 6–3: Reinstalling a hub cover . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6–4: Communication module guide . . . . . . . . . . . . . . . . . . . . . .
Table of Contents Figure 10–1: Exploded view, front case half . . . . . . . . . . . . . . . . . . . . . Figure 10–2: Exploded view, LCD display . . . . . . . . . . . . . . . . . . . . . . Figure 10–3: Exploded view, main board and disk drive . . . . . . . . . . Figure 10–4: Exploded view, circuit board assembly and fan . . . . . . . Figure 10–5: Exploded view, rear case half . . . . . . . . . . . . . . . . . . . . . .
Table of Contents List of Tables Table 1–1: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1 Table 6–1: Internal inspection check list . . . . . . . . . . . . . . . . . . . . . . . Table 6–2: Removal and installation procedures . . . . . . . . . . . . . . . . . 6–3 6–6 Table 7–1: TDS3000 Series options . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents vi TDS3000 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. 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. Connect the probe output to the measurement instrument before connecting the probe to the circuit under test.
General Safety Summary Avoid Exposed Circuitry. Do not touch exposed connections and components when power is present. Do Not Operate With Suspected Failures. If you suspect there is damage to this product, have it inspected by qualified service personnel. Do Not Operate in Wet/Damp Conditions. Do Not Operate in an Explosive Atmosphere. Keep Product Surfaces Clean and Dry. Provide Proper Ventilation.
General Safety Summary Preventing Electrostatic Damage CAUTION. Electrostatic discharge (ESD) can damage components in the oscilloscope and its accessories. To prevent ESD, observe these precautions when directed to do so. Use a Ground Strap. Wear a grounded antistatic wrist strap to discharge the static voltage from your body while installing or removing sensitive components. Use a Safe Work Area.
General Safety Summary x TDS3000 Series Service Manual
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, switch off the instrument power, then disconnect the power cord from the mains power.
Service Safety Summary xii TDS3000 Series Service Manual
Preface This is the Service Manual for the following TDS3000 Series Digital Phosphor Oscilloscopes: H TDS3012 H TDS3014 H TDS3032 H TDS3034 H TDS3052 H TDS3054 This manual provides information to troubleshoot and repair the instrument to the module level. Related Manuals Additional documentation for the instrument is contained in the related manuals listed below.
Preface Service Programs Tektronix offers calibration service and a program to extend repair coverage beyond the warranty period. These programs are cost-effective ways to maintain genuine Tektronix service for your instrument. Ask your Tektronix distributor for details. Contacting Tektronix Product Support For application-oriented questions about a Tektronix measurement product, call toll free in North America: 1-800-TEK-WIDE (1-800-835-9433 ext. 2400) 6:00 a.m. – 5:00 p.m.
Specifications This appendix contains specifications for the TDS3000 series oscilloscopes. All specifications are guaranteed unless noted as “typical.” Typical specifications are provided for your convenience but are not guaranteed. Specifications that are marked with the n symbol are checked in Performance Verification. All specifications apply to all TDS3000 models unless noted otherwise.
Specifications Table 1–1: Specifications (cont.) Inputs Input coupling DC, AC, or GND Channel input remains terminated when using GND coupling. Input impedance, DC coupled 1 MW ±1% in parallel with 13 pF ±2 pF, TekProbe compatible Maximum voltage at input p BNC NC (11 MW) W Overvoltage category Maximum voltage CAT I Environment (refer to page 1–11) 150 VRMS (400 Vpk) CAT II Environment (refer to page 1–11) 100 VRMS (400 Vpk) 50 W ±1%; VSWR ≤ 1.
Specifications Table 1–1: Specifications (cont.
Specifications Table 1–1: Specifications (cont.) Vertical Peak detect or Envelope pulse resp se typical p response, Sample rates ≤125 MS/s Sample rates ≥250 MS/s 1 ns 1/sample rate DC gain accuracy ± 2%, derated at 0.07%/°C for temperatures below +18° C and above +28° C, in Sample or Average acquisition mode DC measurement accuracy Measurement type DC Accuracy (in volts) Absolute measurement of any waveform point, and High, Low, Max, and Min measurements. ± [0.
Specifications Table 1–1: Specifications (cont.) Horizontal Acquisition (horizontal) resolution Normal Fast trigger Record length 10,000 points 500 points Acquisition rate, maximum Up to 450 waveforms/s Up to 3,000 waveforms/s Acquisition resolution TDS3012 TDS3014 TDS3032 TDS3034 TDS3052 TDS3054 Normal 100 S/s to 1 GS/s 100 S/s to 2.5 GS/s 100 S/s to 5 GS/s Fast trigger 5 S/s to 1.25 GS/s 5 S/s to 2.
Specifications Table 1–1: Specifications (cont.) Trigger Edge trigger se s p sensitivity, typical Trigger level range 3.5 times the DC-coupled limits Any channel, HF REJ coupled 1.5 times the DC-coupled limit from DC to 30 kHz, attenuates signals above 30 kHz Any channel, LF REJ coupled 1.
Specifications Table 1–1: Specifications (cont.) Display Display screen 6.
Specifications Table 1–1: Specifications (cont.
Specifications Table 1–1: Specifications (cont.) Environmental Altitude Operating limit: 3000 m Nonoperating limit: 15,000 m Random vibration Operating: 0.31 gRMS from 5 Hz to 500 Hz, 10 minutes on each axis Nonoperating: 2.46 gRMS from 5 Hz to 500 Hz, 10 minutes on each axis Drop resistance, typical Survives a 152 mm (6 in) drop onto concrete with only cosmetic damage Mechanical Size Height: 176 mm (6.9 in), 229 mm (9.0 in) including handle Width: 375 mm (14.75 in) Depth: 149 mm (5.
Specifications Table 1–1: Specifications (cont.) EMC certifications and compliances EMC Compliance: European Union 1–10 Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility.
Specifications Table 1–1: Specifications (cont.
Specifications 1–12 TDS3000 Series Service Manual
Operating Information This chapter provides an overview of the following topics: H Transporting the oscilloscope H Connecting power and using the battery pack H Installing an application module H Installing a communication module H Front-panel menus and controls H Front- and rear-panel connectors H Probe compensation H Self calibration For more detailed information about operating information, see the TDS3000 Series User Manual.
Operating Information Transporting the Oscilloscope When transporting the oscilloscope, wrap the cord around the handle as shown below. Use the supplied cord retainer if the power plug does not have a molded-in retainer. The oscilloscope front cover has a convenient place to store the Reference Manual. If you are not using a battery, use the accessory tray in the battery compartment to store probes and other accessories. CAUTION.
Operating Information Connecting Power To connect a power cord, do these steps: 1. Open the strain relief and slip it over the power cord. 2. Snap the strain relief into its hole in the rear panel of the oscilloscope. 3. Connect the power cord to the power input connector. You can operate the oscilloscope from a grounded mains supply with line voltage between 90 VAC and 250 VAC and frequency between 47 Hz and 440 Hz. The oscilloscope is grounded through the power cord.
Operating Information Operating Safely with Battery Power WARNING. To avoid electric shock, always connect the rear-panel ground terminal to earth ground when operating the instrument from battery power. For safe operation, the oscilloscope chassis must remain at earth ground potential even when operating from battery power. Without a connection between the chassis and earth ground, you can receive a shock from exposed metal on the chassis if you connect an input to a hazardous voltage (>30 VRMS, >42 Vpk).
Operating Information Installing and Removing the Battery To install the optional battery pack, do these steps: 1. Open the battery compartment door on the rear panel and remove the accessory tray. Battery door (Opened) 2. Slide the battery into the compartment and press it in from both sides until you hear the latches click. 3. Press on both sides of the battery compartment door to snap it closed. To remove the battery, do these steps: 1. Open the battery compartment door. 2.
Operating Information Charging the Battery The battery charges automatically when the oscilloscope is connected to line power. You can also charge the battery with the optional external charger (TDS3CHG). Configuration Typical charging time Battery charging in oscilloscope with oscilloscope turned on or off 18 hours Battery charging with TDS3CHG external charger 3 hours NOTE. Charge the battery before using it for the first time or after prolonged storage.
Operating Information Installing an Application Module CAUTION. To avoid damage to the oscilloscope or application module, observe the ESD precautions described on page ix. Optional application modules are available to extend the capability of your oscilloscope. You can install up to four application modules at one time. Application modules can go into the two slots with windows in the upper right corner of the front panel. Two additional slots are located behind the two you can see.
Operating Information 6. If the application module came with one or more floppy disks, insert the firmware upgrade floppy disk into the disk drive. If there is more than one floppy disk, insert firmware upgrade floppy disk number one into the disk drive. 7. Power on the oscilloscope. The oscilloscope determines whether the firmware update is necessary. If no firmware update is necessary, the oscilloscope powers on with no messages. Go to step 9. 8. Push OK Load New Firmware to begin loading the firmware.
Operating Information Installing a Communication Module CAUTION. To avoid damage to the oscilloscope or communication module, observe the ESD precautions described on page ix. To install one of the optional communications modules, do these steps: 1. Turn the oscilloscope power off. 2. Press down on the latching tab to remove the blank cover. 3. Slide the communication module into the compartment until the internal connectors are seated and the latching tab locks. 4. Turn power on.
Operating Information Front-Panel Menus and Controls The front panel has buttons and controls for the functions you use most often. The front panel has menus to access more specialized functions. Using the Menu System To use the menu system, follow the steps shown on the next two pages. 1. Push a dark-colored front-panel menu button to display the menu you want to use. MEASURE SAVE/RECALL QUICKMENU CURSOR VERTICAL DISPLAY HORIZONTAL UTILITY TRIGGER ACQUIRE 2.
Operating Information 3. Push a side screen button to choose a menu item. If the menu item contains more than one choice, push the side screen button again to make the choice. 4. Certain menu choices require you to set a numerical value to complete the setup. Use the general purpose knob to adjust the parameter value. Push the COARSE button to make larger adjustments.
Operating Information Using the Menu Buttons You can use the menu buttons to perform many functions in the oscilloscope. SELECT MEASURE SAVE/RECALL QUICKMENU COARSE CURSOR 1 2 3 4 DISPLAY UTILITY 5 6 1. MEASURE. Performs automated measurements of waveforms. 2. CURSOR. Activates the cursors. 3. SAVE/RECALL. Saves and recalls setups and waveforms to memory or a floppy disk. 4. DISPLAY. Changes the appearance of waveforms and the display screen. 5. QUICKMENU.
Operating Information Using the Dedicated Controls These dedicated buttons and controls generally control waveforms and cursors without the use of menus. 3 4 SELECT 5 6 MEASURE SAVE/RECALL QUICKMENU 2 COARSE CURSOR DISPLAY UTILITY 1 VERTICAL HORIZONTAL TRIGGER POSITION POSITION LEVEL ACQUIRE 7 8 9 10 19 SCALE 11 SCALE WAVEFORM INTENSITY 12 13 18 17 16 15 14 1. COARSE. Causes the general purpose knob and position knobs to make adjustments more quickly. 2. SELECT.
Operating Information 12. WAVEFORM INTENSITY. Controls waveform intensity. 13. B TRIG. Activates the B trigger. Changes the trigger menu to set the B-trigger parameters. 14. DELAY. Enables delayed acquisition relative to the trigger event. Use horizontal POSITION to set the amount of delay. 15. Horizontal SCALE. Adjusts the horizontal scale factor. 16. Horizontal zoom. Splits the screen and magnifies the current acquisition horizontally. 17. Waveform OFF. Removes the selected waveform from the display. 18.
Operating Information Identifying Items in the Display The following items may appear in the display; not all items are visible at any given time. Some readouts move outside the graticule area when menus are turned off. 2 3 4 5 6 7 8 1 13 9 10 12 11 1. Waveform baseline icons show the zero-volt level of the waveforms (ignoring the effect of offset). The icon colors correspond to the waveform colors. 2.
Operating Information 14 15 14. A triangle icon with the battery icon indicates that a battery is installed and battery power is in use. The battery icon shows the approximate charge level of the battery. See page 2–4 for important safety information. 15. A power-plug icon with the battery icon indicates that a battery is installed but line power is in use. The battery may be charging. The battery icon shows the approximate charge level.
Operating Information 1 7 5 4 2 3 6 1. Edge Trigger controls. Push these screen buttons to set trigger parameters for edge trigger. 2. Trigger controls if either B trigger or video trigger is selected. 3. Cursor control. Push this screen button to turn on cursors and select the cursor type. Push the SELECT button to toggle between the two cursors to select the active cursor. Use the general purpose knob to move the active cursor. 4. Acquisition controls.
Operating Information Front-Panel Connectors 1 1MW, 13pF ≤300 VRMS CATl CH 1 CH 2 1MW, 13pF ≤300 VRMS CATl [ Ɩ PROBE COMP 5V 50W ≤5VRMS CH 3 CH 4 50W ≤5VRMS 2 1 1MW, 17pF ≤300 VRMS CATl 1MW, 13pF ≤300 VRMS CATl CH 1 CH 2 PROBE COMP 5V [ Ɩ EXT TRIG 50W ≤5VRMS 2 3 1. PROBE COMP. Square wave signal source to compensate probes. 2. CH1, CH 2, (CH3, CH4). Channel inputs with TekProbe interface. 3. EXT TRIG. External trigger input with TekProbe interface (two-channel models only).
Operating Information Rear-Panel Connectors 1 2 5 3 4 1. Parallel printer port. Connect to a printer to make hard copies. 2. CAL switch. For use by authorized service personnel only. 3. DC power output. Provides accessory power. 4. Ground terminal. Connect to earth ground when using battery power. See page 2–4 for important safety information. 5. Power input. Attach to an AC power line with integral safety ground. 8 6 TDS3GM 7 TDS3VM 7 6. GPIB port.
Operating Information Probe Compensation Perform this adjustment to match your probe to the input channel. This should be done whenever you attach a passive probe for the first time to any input channel. 1. Connect the oscilloscope probe to channel 1. Attach the probe tip and reference lead to the PROBE COMP connectors, then push AUTOSET. If using the probe hook-tip, ensure a proper connection by firmly twisting the tip onto the probe. PROBE COMP AUTOSET button CH 1 2.
Operating Information Self Calibration The self calibration routine lets you quickly optimize the oscilloscope signal path for maximum measurement accuracy. You can run the routine anytime but you should always run the routine if the ambient temperature changes by 10_ C or more. To compensate the signal path, do the following steps: 1. Disconnect any probes or cables from the channel input connectors. 2. Push the UTILITY button. 3. Push the System screen button to select Cal. 4.
Operating Information 2–22 TDS3000 Series Service Manual
Theory of Operation This chapter describes the electrical operation of the oscilloscope to the module level. Figure 3–1 shows the oscilloscope module interconnections. Display backlight Display Parallel printer connector Battery pack J150 AC Line Power supply J100 J950 J100 J500 J860 J810 comm.
Theory of Operation Battery Board The battery board provides the following functions: H Interfaces to the optional battery pack (powers the oscilloscope from the battery pack or charges the battery pack when the oscilloscope is connected to AC line). H Turns on AC power to the oscilloscope. H Converts 15 VDC from the power supply to 5 VDC for the main and front panel boards and ±15 VDC for probe power. H Powers the cooling fan.
Theory of Operation Power Converter The power converter receives 15 VDC (or battery voltage) from the battery board and generates voltages for the analog and digital circuitry on the main board. Display Module The display module consists of a color liquid crystal display (LCD), a display driver, a pair of fluorescent back light tubes, and a high-voltage back light power supply.
Theory of Operation 3–4 TDS3000 Series Service Manual
Performance Verification n This chapter contains performance verification procedures for the specifications marked with the symbol. The following equipment, or a suitable equivalent, is required to complete these procedures. Description Minimum requirements DC Voltage Source 3 mV to 4 V, ±0.
Performance Verification Test Record Serial number Procedure performed by Test Date Passed Failed Test result High limit Self Test Performance checks Low limit Channel 1 DC me s reme measurement r accuracy 1 mV/div 99.25 mV 100.8 mV 2 mV/div –7.540 mV –6.460 mV 5 mV/div –101.8 mV –98.24 mV 50 mV/div 982.4 mV 1.018 V 50 mV/div 632.4 mV 667.6 mV 50 mV delta 340.5 mV 359.5 mV 90 mV/div –339.3 mV –290.7 mV 200 mV/div 9.900 V 10.10 V 1 V/div –10.30 V –9.698 V 1 mV/div 99.
Performance Verification Performance checks Low limit Channel 3 DC me s reme measurement r accuracy 1 mV/div 99.25 mV 100.8 mV 2 mV/div –7.540 mV –6.460 mV 5 mV/div –101.8 mV –98.24 mV 50 mV/div 982.4 mV 1.018 V 50 mV/div 632.4 mV 667.6 mV 50 mV delta 340.5 mV 359.5 mV 90 mV/div –339.3 mV –290.7 mV 200 mV/div 9.900 V 10.10 V 1 V/div –10.30 V –9.698 V 1 mV/div 99.25 mV 100.8 mV 2 mV/div –7.540 mV –6.460 mV 5 mV/div –101.8 mV –98.24 mV 50 mV/div 982.4 mV 1.
Performance Verification Performance Verification Procedures Before beginning these procedures, two conditions must first be met: H The oscilloscope must have been operating continuously for ten minutes in an environment the meets the operating range specifications for temperature and humidity. H You must perform the Compensate Signal Path operation described on page 2–21. If the operating temperature changes by more than 10° C, you must perform the Compensate Signal Path operation again.
Performance Verification Check DC Voltage Measurement Accuracy This test checks the DC voltage measurement accuracy in the average acquisition mode. 1. Set the DC voltage source output level to 0 V. 2. Connect the DC voltage source to the oscilloscope channel 1 input as shown below. DC voltage source TDS3000 Series Oscilloscope Ch 1 3. Push the SAVE/RECALL menu button. 4. Push the Recall Factory Setup screen button and then push the OK Confirm Factory Init screen button. 5.
Performance Verification Vertical SCALE setting Invert setting Bandwidth limit setting Offset Input voltage Low limit High limit 1 mV/div Off 20 MHz 96.5 mV 100 mV 99.25 mV 100.8 mV 2 mV/div Off 20 MHz 0.0 V –7 mV –7.540 mV –6.460 mV 5 mV/div Off 20 MHz –82.5 mV –100 mV –101.8 mV –98.24 mV 50 mV/div Off Full 825 mV 1.0 V 982.4 mV 1.018 V 50 mV/div Off Full 825 mV 650 mV 632.4 mV 667.6 mV 340.5 mV 359.5 mV 50 mV delta1 90 mV/div 2 Off Full 0.0 V –315 mV –339.
Performance Verification Check Bandwidth This test checks the bandwidth for each channel. 1. Connect the output of the leveled sine wave generator to the oscilloscope channel 1 input as shown below. Leveled sine wave generator TDS3000 Series Oscilloscope Ch 1 2. Push the SAVE/RECALL menu button. 3. Push the Recall Factory Setup screen button and then push the OK Confirm Factory Init screen button. 4. Push the acquire MENU button. 5. Push the Mode screen button and then push the Average screen button.
Performance Verification 18. Push the – more – screen button until you can select the Pk-Pk measurement. 19. Set the vertical SCALE to 100 mV/div. 20. Set the output frequency of the leveled sine wave generator to 50 kHz. 21. Set the output amplitude of the leveled sine wave generator so the peak-topeak measurement is between 599 mV and 601 mV. 22. Set the horizontal SCALE to 10 ns/div. 23. Set the output frequency of the leveled sine wave generator to the frequency shown in the table below.
Performance Verification Check Channel Edge-Trigger Sensitivity This test checks the edge-trigger sensitivity for each channel. 1. Connect the output of the leveled sine wave generator to the oscilloscope channel 1 input as shown below. Leveled sine wave generator TDS3000 Series Oscilloscope Ch 1 2. Push the SAVE/RECALL menu button. 3. Push the Recall Factory Setup screen button and then push the OK Confirm Factory Init screen button. 4. Push the acquire MENU button. 5.
Performance Verification 19. Set the output frequency of the leveled sine wave generator to the frequency shown in the table below. Oscilloscope model Frequency TDS3012, TDS3014 100 MHz TDS3032, TDS3034 300 MHz TDS3052, TDS3054 500 MHz 20. Set the output amplitude of the leveled sine wave generator so the peak-topeak measurement is approximately 500 mV. 21. Push the SET TO 50% button. Adjust the trigger LEVEL as necessary and then verify that triggering is stable. 22. Push the trigger MENU button.
Performance Verification Check Sample Rate and Delay Time Accuracy This test checks the time base accuracy. 1. Connect the output of the leveled sine wave generator to the oscilloscope channel 1 input as shown below. Time mark generator TDS3000 Series Oscilloscope Ch 1 2. Push the SAVE/RECALL menu button. 3. Push the Recall Factory Setup screen button and then push the OK Confirm Factory Init screen button. 4. Set the time mark generator period to 10 ms.
Performance Verification 15. Turn the horizontal POSITION control counter-clockwise to set the delay to exactly 10 ms. 16. Set the horizontal scale to 1 ms/div. 17. Check that the rising edge of the marker crosses the center horizontal graticule line within ±2 divisions of center graticule. NOTE. One division of displacement from graticule center corresponds to a 100 ppm time base error. This completes the performance verification procedure.
Adjustment Procedures This chapter contains the factory adjustment procedures for the oscilloscope. Only qualified personnel should perform service procedures. Read this Service Safety Summary and the General Safety Summary before performing any service procedures. Also refer to the chapter Operating Information for information about using the oscilloscope. NOTE. The voltage references inside the oscilloscope are very stable over time and should not require routine adjustment.
Adjustment Procedures Overview of the Adjustment Process The oscilloscope is protected from inadvertently changing factory adjustments by a rear-panel switch. To perform the factory adjustment, you must push and hold the switch while you power on the oscilloscope. Before performing adjustment procedures, you must warm up the oscilloscope at least ten minutes in an ambient temperature between 20° C and 30° C.
Adjustment Procedures Signal Connections The adjustment procedure requires three types of equipment setups if you are adjusting a four-channel oscilloscope, or four types if you are adjusting a two-channel oscilloscope. For each step of the procedure, the oscilloscope display indicates which setup is the correct one to use. The equipment setups are described below. Apply DC Voltage to Channels The first steps require a DC voltage (or zero volts) to be applied simultaneously to all the channels.
Adjustment Procedures NOTE. If the DC voltage source you are using has an output head, use a female-to-female BNC adapter and a short BNC cable to make the connection to the first BNC tee. When you are given the instruction to apply a 0 V DC signal, turn off or ground the output of the DC voltage source to be sure that no DC voltage is present. Apply Pk-Pk Voltage to a Channel Later in the procedure, a leveled sine wave needs to be applied to each channel, one channel at a time.
Adjustment Procedures Apply Fast Rise Step Signal to all Channels During the procedure a fast rise step signal needs to be applied simultaneously to all channels. A typical on-screen instruction might read: Apply 1.000 V PkĆPk fastĆrise signal to all channels. Use the ’Apply DC Voltage to Channels’ equipment setup shown on page 5–3. NOTE. Make sure that the coax cable connection path length is the same for all channels. The fast-rise signal Pk-Pk range is -1 V to 0 V.
Adjustment Procedures Factory Adjustment Procedure To perform the factory adjustment procedure, do these steps: 1. Locate the hole that provides access to the CAL switch on the rear panel. CAL 2. Put the adjustment tool into the CAL switch hole. Push and hold the CAL switch in while you power on the oscilloscope. Release the switch when the oscilloscope shows the power-on message with the oscilloscope graticule in the background. 3. Push the SAVE/RECALL button. 4.
Adjustment Procedures 11. Connect signals from the DC voltage source, leveled sine wave, or fast-rise generator as instructed by the oscilloscope display. After you connect the correct signal, push the OK Do Next Step screen button to continue the process. NOTE. The oscilloscope adjusts itself automatically using the reference signal from the DC voltage source, leveled sine wave, or fast-rise generator. There are no manual oscilloscope adjustments that you need to make.
Adjustment Procedures 5–8 TDS3000 Series Service Manual
Maintenance This chapter contains the information needed to do periodic and corrective maintenance on the oscilloscope. The following sections are included: H Preparation refers you to important information contained elsewhere in this manual. H Preventing ESD provides general information on preventing damage to internal modules when doing maintenance. H Inspection and Cleaning provides procedures for inspecting the oscilloscope and cleaning its external and internal modules.
Maintenance 3. Discharge the static voltage from your body by wearing a grounded antistatic wrist strap while handling these modules. Do service of static-sensitive modules only at a static-free work station. 4. Nothing capable of generating or holding a static charge should be allowed on the work station surface. 5. Handle circuit boards by the edges when possible. 6. Do not slide the modules over any surface. 7.
Maintenance Inspection — Exterior. Inspect the outside of the oscilloscope for damage, wear, and missing parts. An oscilloscope that appears to have been dropped or otherwise abused should be checked thoroughly to verify correct operation and performance. Immediately repair defects that could cause personal injury or lead to further damage to the oscilloscope. Cleaning Procedure — Exterior. To clean the oscilloscope exterior, perform the following steps: 1.
Maintenance Table 6–1: Internal inspection check list (Cont.) Item Inspect for Repair action Solder connections Cold solder or rosin joints. Resolder joint and clean with isopropyl alcohol. Wiring and cables Loose plugs or connectors. Burned, broken, or frayed wiring. Firmly seat connectors. Repair or replace modules with defective wires or cables. Cleaning Procedure — Interior. To clean the oscilloscope interior, perform the following steps: 1.
Maintenance Removal and Installation Procedures This section describes how to remove and install the major mechanical and electrical modules. It provides the following information: H List of Modules on page 6–5 describes where to locate a list of replaceable modules. H Summary of Procedures on page 6–6 lists the procedures for removal and installation of modules. H Tools Required on page 6–7 describes the tools needed to perform the procedures.
Maintenance Summary of Procedures Table 6–2 lists the removal and installation procedures in order of increasing complexity. Within each procedure, only perform the steps that are required to access the modules that need repair.
Maintenance Tools Required You will need the following tools to remove and replace all the modules in the oscilloscope. H Torque-limiting screwdriver, 12 in ⋅ lb (1.3 N ⋅ m) range with Torx T-10 and T-15 tips (If you are using a magnetic screwdriver with interchangeable bits, the T-15 bit must be a long bit, at least 5 cm (2 in) overall length).
Maintenance Handle Hub Metal pin Figure 6–1: Pulling the hub pin 5. Place the oscilloscope on its feet on soft surface (such as an anti-static mat), with the display-side hub facing you. 6. Lower the handle toward the rear into a horizontal position. The hub should rotate with the handle. 7. Pull outward on the handle at the hub to release the display-side hub assembly. You may need to rotate the handle back and forth slightly to help release the hub assembly. See Figure 6–2.
Maintenance Rotate the handle Pull on the handle Hub Figure 6–2: Releasing the hub assembly 8. Locate the remaining hub on the opposite side of the oscilloscope. Place the oscilloscope with the remaining hub facing you. 9. Rotate the handle downward to its lowest position. 10. Use the needle-nose pliers to pull the metal pin in the remaining hub outward approximately 5 mm (0.2 in).
Maintenance 11. Raise the handle to its full upright position. The hub should rotate with the handle. 12. Pull outward on the handle to release the remaining hub assembly. You may need to rotate the handle back and forth slightly to help release the hub assembly. 13. Grasp the handle from both sides and remove it from the oscilloscope. Installation. Use this procedure to reinstall the handle. 1. Place the oscilloscope on its feet on soft surface (such as an anti-static mat), with the front facing you. 2.
Maintenance 8. While pressing in on the hub assembly with your fingers, rotate the handle to its full upright position. The hub assembly should rotate with the handle. 9. Use the 1@8 inch flat-bladed screwdriver to push the metal pin in to lock the hub assembly. 10. Verify that both hub assemblies do not rotate when you rotate the handle. 11. Snap the hub covers into place over the hub assemblies. See Figure 6–3.
Maintenance 6. Release the small communication module guide tab by lifting the chassis, and then remove the communication module guide. See Figure 6–4. Tab Communication module guide Figure 6–4: Communication module guide 7. Carefully open the connector that captures the disk drive flex cable and disconnect the flex cable from the disk drive. See Figure 6–5. 8. Lift the disk drive out of the oscilloscope chassis.
Maintenance Pins are face down Disk drive Figure 6–5: Flex cable to the disk drive Installation. Use this procedure to install the disk drive, communication module guide, feet, rear case, and communication module cover. 1. Place the oscilloscope face down on soft surface (such as an anti-static mat), with the bottom facing you. 2. Install the communication module guide into the chassis. Lift the chassis and insert the small tab in the chassis slot. See Figure 6–4. 3.
Maintenance Disk drive Bezel Figure 6–6: Removing the bezel from a new disk drive 5. Carefully open the connector on the disk drive, insert the flex connector, and then close the connector. See Figure 6–5. 6. Place the rear case over the oscilloscope chassis and lower it. Be sure that the disk drive is captured inside the case and does not slip from its correct position. The rear case should fit over and capture the feet. 7. Press the rear case downward so that it is seated completely. 8.
Maintenance Rear Chassis You will need a Torx T-15 screwdriver to remove the rear chassis. You will need a 3@16 inch nut driver to remove the parallel printer port cable. Removal. Use this procedure to remove the rear chassis, battery board, external power jack, power supply, power supply bracket, line filter, fan, and parallel printer port cable. 1. Place the oscilloscope face down on soft surface (such as an anti-static mat), with the bottom facing you. 2.
Maintenance 3. Disconnect the external power cable from the battery board. See Figure 6–7. 4. Remove the three screws that secure the rear chassis to the front chassis. 5. Lift the rear chassis assembly from the front chassis. Thread the external power cable through the hole in the front chassis. STOP. If you do not need to disassemble the rear chassis assembly, skip to the next procedure, Main Board, on page 6–20. The following instructions describe complete disassembly of the rear chassis assembly.
Maintenance Installation. Use this procedure to install the fan, line filter, parallel printer port cable, external power jack, power supply, battery board, and rear chassis. Skip the steps for modules that are already installed. Label Key on Power jack Rear chassis Fan cable hole Bend the tabs External power cable Figure 6–8: Installing the fan, line filter, and line power cable 1. Insert the fan cable through the hole in the rear chassis and place the fan in its cavity.
Maintenance Line power conductor Green wire (ground conductor) Blue wire Line filter Green wire Black wire Power supply board Figure 6–9: Installing the line filter and line power cable 2. Insert the line filter into the rear chassis and secure it with two screws. The ground conductor should face the bottom of the instrument. See Figure 6–9. 3. Connect the line power cable to the line filter and the tab on the rear chassis. See Figure 6–9. 4.
Maintenance 8. Attach the DC power cable to the power supply. 9. Connect the fan power cable to the battery board at J170. 10. Connect the DC power cable to the battery board at J100. 11. Snap the battery board onto the post on the rear chassis. 12. Install two screws to secure the battery board to the rear chassis. 13. Insert the parallel printer connector into the hole in the rear chassis and secure the connector with the two jack posts with the 3@16 inch nut driver. 14.
Maintenance Main Board You will need a 1@8 inch flat-bladed screwdriver and a Torx T-15 screwdriver to remove the main board. Removal. Use this procedure to remove the disk drive cable and main board. 1. Place the oscilloscope assembly face down on a soft surface (such as an anti-static mat), with the bottom facing you. 2. Use the 1@8 inch flat-bladed screwdriver to carefully lift the disk drive cable lock on connector J800 on the main board, then pull the flat ribbon cable from the connector.
Maintenance 3. Grasp and pull up on the inverter board cable wires to disconnect the cable from J950 on the main board. See Figure 6–10. 4. Use the 1@8 inch flat-bladed screwdriver to carefully lift the display cable from connector J500 on the main board. See Figure 6–10. 5. Grasp and pull up on the front-panel cable wires to disconnect the cable from J700 on the main board. See Figure 6–10. 6.
Maintenance Installation. Use this procedure to install the main board and reconnect cables. 1. Place the oscilloscope front-panel assembly face down on soft surface (such as an anti-static mat), with the bottom facing you. 2. With the front-panel cable dressed out of the way, lower the main board into the front chassis assembly. 3. Push down on the two main board corners to engage the snaps. 4.
Maintenance Front Chassis and Display Module You will need a Torx T-10 screwdriver to remove the front chassis. Removal. Use this procedure to remove the front chassis and the display module. 1. Place the oscilloscope face down on a soft surface (such as an anti-static mat), with the bottom facing you. 2. Use the Torx T-10 screwdriver to remove the two screws that secure the front chassis to the front case. See Figure 6–12.
Maintenance NOTE. It is possible to remove the inverter board without removing the front chassis or display module. If this is the only thing you need to do, skip to step 1 on page 6–26. 4. Place the front chassis with the display facing you. See Figure 6–13. 5. Use your thumbs to slide the top display module tabs up until the overhanging part of the tabs clear the chassis holes. See Figure 6–13. 6. Push the tabs through the chassis holes to remove the display module.
Maintenance Installation. Use this procedure to install the display module into the front chassis and install the front chassis. 1. Place the front chassis with the display facing you. See Figure 6–13. 2. Push the display module tabs through the chassis holes. 3. Use your thumbs to slide all four display module tabs down as far as possible to lock the display module in place on the front chassis. 4. Place the oscilloscope face down on a soft surface (such as an anti-static mat), with the bottom facing you.
Maintenance 7. Insert the front chassis assembly into the oscilloscope. Insert the right end of the front chassis slightly ahead of the left end to clear a slight interference at the right end of the chassis. 8. Route the front-panel cable through the notch located on the bottom edge of the front chassis. See Figure 6–14. 9. Use the Torx T-10 screwdriver to insert the two screws that secure the front chassis to the front case.
Maintenance 3. Push the tab and lift the top end of the inverter board to clear the inverter chassis. See Figure 6–16A. 4. Lift and rotate the bottom end of the inverter board to 45°-60° angle, then slide the inverter board clear of the chassis. See Figure 6–16B. 5. Use the 18@ inch flat-bladed screwdriver to carefully lift the tab holding the bottom end of the inverter board chassis to the display chassis, and at the same time lift that end of the inverter board chassis.
Maintenance 6. Use your thumb to push the tab on the top right side of the display chassis until the tab clears the display assembly. Then push the top-right corner of the display, from the front of the display, to clear the tab. Repeat for the other display chassis tab. See Figure 6–17. Clears tab Push tab Display chassis Display module Figure 6–17: Remove display from display chassis 7.
Maintenance 8. Use your thumb to push down the tab next to a back light tube, at the same time pulling the back light tube cable to slide the back light out of the display. See Figure 6–18.
Maintenance Installation. Use this procedure to reassemble the display module. 1. Insert backlight tubes into the display, with the open side of the tube toward the center of the display, until the tube clicks into place. The backlight tubes slide easily into the display when they are aligned correctly. 2. Place the display chassis face down on soft surface (such as an anti-static mat), with the bottom facing you. The extended chassis tabs should be on your right. See Figure 6–17. 3.
Maintenance 6. Insert the inverter board assembly into the slots at the top and bottom of the display chassis. The high-voltage shield end of the board is at the top of the display. Push firmly until the tabs click. 7. Insert the display back light cable connectors into the inverter board. Position the back light cables in the display chassis clips. See Figure 6–15. Front Panel You do not need any tools to remove the front panel board. Removal.
Maintenance 3. Place the oscilloscope face down on a soft surface (such as an anti-static mat), with the bottom facing you. 4. Disconnect the bezel button flex circuit from J200 by gently pulling the flex circuit out of the connector. Gently remove the flex circuit from the front panel and place on a clean protected surface. 5. Remove the front-panel board by pulling back board snaps and lifting the lower right corner of the front-panel board.
Maintenance 6. Remove the front-panel and bezel button keypads by lifting them away from the front panel. Do not touch the keypad contacts or place them on a contaminated surface. See Figure 6–22.
Maintenance Installation. Use this procedure to reinstall the front-panel board. 1. Check that the front-panel lock nuts are still in the front panel before installing the front panel keypad and board. These nuts are pressure-fit and can come loose. See Figure 6–23. Make sure lock nuts are in place Figure 6–23: Checking front-panel lock nuts 2. Install the front-panel keypad into the front panel. Do not touch the keypad contacts. See Figure 6–22. 3.
Maintenance Troubleshooting This section contains information and procedures to help you isolate a defective module in a TDS3000 series oscilloscope. WARNING. Before doing this or any other procedure in this manual, read the General Safety Summary and Service Safety Summary found at the beginning of this manual. Also, to prevent possible injury to service personnel or damage to electrical components, read Preventing ESD on page ix.
Maintenance Troubleshooting Procedure Figures 6–24 through 6–31 are troubleshooting procedure flowcharts. Use them to troubleshoot an instrument failure. Begin with Figure 6–24. NOTE. Before performing the troubleshooting procedure, remove the instrument cabinet (see page 6–5). Power on the oscilloscope. Does the scope display the power-up screen? No Perform the power-on troubleshooting procedure (Figure 6–25). No Perform the Module Isolation troubleshooting procedure (Figure 6–31).
Maintenance Continued from Figure 6–24. Power off oscilloscope. Remove battery if installed. Connect the AC power cord. Power on oscilloscope. " +5.1 VDC ( 0.15 V) Use DMM to measure voltages on front-panel BNC connector pads (see BNC connector diagram at right). Are all voltages within tolerance? Any front panel BNC connector Ground (BNC shell) " +15 VDC ( 1.2 V) Yes Proceed to Figure 6–30. No Troubleshoot power distribution problem (Figure 6–26). " –15 VDC ( 1.2 V) " –5 VDC ( 0.
Maintenance Continued from Figure 6–25. Power off oscilloscope. Disconnect AC power cord. Remove instrument case. Check that all cables are connected and fully seated into board connectors. Are all cables connected? No Reconnect loose cables. Return to top of Figure 6–24. Pin 18 Pin 13 Yes Disconnect J100 cable from Pin 1 battery board. Connect AC power cord. Power on oscilloscope. Measure for +15 V DC (± 0.5 V) between line 13 (+) and line 18 (–) of the disconnected cable.
Maintenance Continued from Figure 6–26. Pin 12 Power off oscilloscope. Disconnect AC power cord. Reconnect J100 cable to the Cable from battery board Pin 1 battery board. Disconnect J900 cable from the main board. Connect AC power cord. Power on oscilloscope. Measure voltages on disconnected cable as shown in diagram at right. Are voltages within tolerance? No Replace the Battery board module. Yes Power off oscilloscope. Disconnect AC power cord.
Maintenance Continued from Figure 6–27. Power off oscilloscope. Disconnect AC power cord. Disconnect J700 cable from the main board. Connect AC power cord. Power on oscilloscope. Measure voltages on connected J900 cable as shown in Figure 6–27 (page 6–39). Are voltages within tolerance? Yes No Power off oscilloscope. Disconnect AC power cord. Reconnect J700 cable to main board. Disconnect J950 cable from main board. Connect AC power cord. Power on oscilloscope.
Maintenance Continued from Figure 6–28. Power off oscilloscope. Disconnect AC power cord. Disconnect J500 cable from the main board (Figure 6–10 on page 6–20). Connect AC power cord. Power on oscilloscope. Measure voltages on connected J900 cable as shown in Figure 6–27 (page 6–39). Are voltages within tolerance? No Replace Main board module Yes Replace Display module.
Maintenance This procedure assumes that the oscilloscope displays power-up diagnostics messages. Does the power-up screen report any errors? No Oscilloscope is operating OK. Yes Push UTILITY. Push System to select Diags. Push OK Confirm Run Test. Determine failure. Use table to select module to replace.
Maintenance Unpacking and Repacking Instructions This section contains the information needed to unpack the oscilloscope and repack it for shipment or storage. Unpacking The oscilloscope and its standard accessories are carefully packed at the factory in a shipping carton. If, upon receipt, damage to the shipping carton is evident, notify the shipper. Tektronix, Inc. is not responsible for damage caused during shipping.
Maintenance 6–44 TDS3000 Series Service Manual
Options The TDS3000 series options, listed in Table 7–1, provide power cords and documentation packages for international customers.
Options 7–2 TDS3000 Series Service Manual
Electrical Parts List Refer to the Mechanical Parts List chapter for a complete listing and description of replaceable parts for the oscilloscope.
Electrical Parts List 8–2 TDS3000 Series Service Manual
Diagrams See Figure 3–1 on page 3–1 for a block/interconnect diagram of the oscilloscope. There are no additional diagrams in this chapter.
Diagrams 9–2 TDS3000 Series Service Manual
Mechanical Parts List This chapter contains a list of the replaceable modules for the TDS3000 series oscilloscope. 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.
Mechanical Parts List Module Servicing Modules can be serviced by selecting one of the following three options. Contact your local Tektronix service center or representative for repair assistance. Module Exchange. In some cases you may exchange your module for a remanufactured module. These modules cost significantly less than new modules and meet the same factory specifications. For more information about the module exchange program, call 1-800-TEK-WIDE, extension 6630. Module Repair and Return.
Mechanical Parts List Mfr. Code to Manufacturer Cross Index The table titled Manufacturers Cross Index shows codes, names, and addresses of manufacturers or vendors of components listed in the parts list. Manufacturers cross index Mfr. code Manufacturer Address City, state, zip code 00779 AMP INC.
Mechanical Parts List 4 5 1 3 2 10 6 9 8 7 Figure 10–1: Exploded view, front case half 10–4 TDS3000 Series Service Manual
Mechanical Parts List Replaceable parts list Fig. & index number Tektronix part number 10–1–1 Serial no. effective Serial no. discont’d Qty Name & description Mfr. code Mfr.
Mechanical Parts List 7 6 5 4 3 2 1 8 9 11 12 10 Figure 10–2: Exploded view, LCD display 10–6 TDS3000 Series Service Manual
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 10-2-1 441–2144–00 1 CHASSIS:FRONT,0.050 AL,13.020 X 2.860 0J9P9 441–2144–00 10-2-2 380–1117–00 1 HOUSING,DISPLAY:LCD CARRIER,POLY/ABS TK6179 380–1117–00 10-2-3 337–4148–00 1 SHIELD,ASSY:DISPLAY,5.950 X 4.600,0.079 GLASS 0APF4 337–4148–00 10-2-4 119–5659–01 1 DISPLAY MODULE:LCD,COLOR,640 X 480,6.
Mechanical Parts List 1 4 2 3 5 2 6 Figure 10–3: Exploded view, main board and disk dive 10–8 TDS3000 Series Service Manual
Mechanical Parts List Replaceable parts list Fig. & index number Tektronix part number 10-3-1 Serial no. effective Serial no. discont’d Qty Name & description Mfr. code Mfr. part number 174–3762–00 1 CA ASSY, SP:FLEX,DISPLAY,FLX,33 AWG,0.5MM CTR,5.0 L,TIN/LEAD PLATED CONDUCTORS X 31 POS,LCD 060D9 174–3762–00 10-3-2 211–0721–00 4 SCREW,MACHINE:6–32 X 0.
Mechanical Parts List 4 3 2 6 3 5 1 7 8 9 12 16 3 3 14 11 13 10 15 Figure 10–4: Exploded view, circuit board assembly and fan 10–10 TDS3000 Series Service Manual
Mechanical Parts List Replaceable parts list Fig. & index number Tektronix part number 10-4-1 Serial no. effective Serial no. discont’d Qty Name & description Mfr. code Mfr. part number 679–4090–00 1 CKT BD SUBASSY:POWER SUPPLY,389–2389–XX WIRED 80009 679–4090–00 10-4-2 441–2145–00 1 CHASSIS:REAR,0.050 AL,12,795 X 3.620,CHROMATE 0J9P9 441–2145–00 10-4-3 211–0721–00 7 SCREW,MACHINE:6–32 X 0.
Mechanical Parts List 1 2 4 3 6 5 7 9 8 Figure 10–5: Exploded view, rear case half 10–12 TDS3000 Series Service Manual
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 10-5-1 367–0498–00 1 HANDLE,CARRYING:14.5740 X 6.3230 7X318 367–0498–00 10-5-2 200–4415–00 1 COVER:OPTION MODULE OPENING,5.1440 X 0.910 X 0.9950,PC/ABS,FR110,BLUE TK6179 200–4415–00 10-5-3 211–0722–00 1 SCREW,MACHINE:6–32 X 0.
Mechanical Parts List Accessories list (cont.) Fig. & index number 10–14 Tektronix part number Serial no. effective Serial no. discont’d Qty Name & description Mfr. code Mfr.
