23 Industrial ScopeMeter Service Manual 4822 872 05375 August 1997, Rev. 3, 01/00 © 1997 Fluke Corporation. All rights reserved. Printed in the Netherlands All product names are trademarks of their respective companies.
SERVICE CENTERS To locate an authorized service center, visit us on the World Wide Web: http://www.fluke.com or call Fluke using any of the phone numbers listed below: +1-888-993-5853 in U.S.A.
Table of Contents Chapter 1 Title Safety Instructions ............................................................................. 1-1 1.1 Introduction................................................................................................. 1.2 Safety Precautions....................................................................................... 1.3 Caution and Warning Statements................................................................ 1.4 Symbols.......................................
123 Service Manual 3.3 Detailed Circuit Descriptions...................................................................... 3.3.1 Power Circuit ....................................................................................... 3.3.2 Channel A - Channel B Measurement Circuits ................................... 3.3.3 Trigger Circuit ..................................................................................... 3.3.4 Digital Circuit .................................................................
Contents (continued) 6 Disassembling the Test Tool ............................................................. 6-1 6.1. Introduction................................................................................................ 6.2. Disassembling Procedures ......................................................................... 6.1.1 Required Tools .................................................................................... 6.2.2 Removing the Battery Pack .....................................
123 Service Manual 10 Modifications ...................................................................................... 10-1 10.1 Software modifications ............................................................................. 10-1 10.2 Hardware modifications............................................................................
List of Tables Table 2-1. 2-2. 2-3. 3-1. 3-2. 3-3. 3-4. 3-5. 3-6. 4-1. 4-2. 4-3. 4-4. 4-5. 4-6. 4-7. 4-8. 4-9. 5-1. 5-2. 5-3. 5-4. 7-1. 8-1. 8-2. 8-3. 9-1. 9-2. Title No Visible Trace Disturbance ............................................................................... Trace Disturbance < 10%...................................................................................... Multimeter Disturbance < 1% ...............................................................................
List of Figures Figure 3-1. 3-2. 3-3. 3-4. 3-5. 3-6. 3-7. 3-8. 3-9. 3-10. 3-11. 3-12. 3-13. 4-1. 4-2. 4-3. 4-4. 4-5. 4-6. 4-7. 4-8. 4-9. 4-10. 4-11. 4-12. 4-13. 4-14. 4-15. 5-1. 5-2. 5-3. 5-4. 5-5. 5-6. 5-7. Title Fluke 123 Block Diagram...................................................................................... Fluke 123 Start-up Sequence, Operating Modes................................................... Power Supply Block Diagram ...............................................................
123 Service Manual 5-8. 5-9. 5-10. 6-1. 6-2. 6-3. 6-4. 6-5. 7-1. 7-2. 8-1. 8-2. 9-1. 9-2. 9-3. 9-4. 9-5. 9-6. 9-7. 9-8. 9-9. 9-10. Four-wire Ohms calibration connections .............................................................. Capacitance Gain Calibration Input Connections ................................................. 20 V Supply Cable for Calibration........................................................................ Fluke 123 Main Assembly...................................................
Chapter 1 Safety Instructions Title 1.1 Introduction................................................................................................. 1.2 Safety Precautions....................................................................................... 1.3 Caution and Warning Statements................................................................ 1.4 Symbols....................................................................................................... 1.5 Impaired Safety ................
Safety Instructions 1.1 Introduction 1 1.1 Introduction Read these pages carefully before beginning to install and use the instrument. The following paragraphs contain information, cautions and warnings which must be followed to ensure safe operation and to keep the instrument in a safe condition. Warning Servicing described in this manual is to be done only by qualified service personnel. To avoid electrical shock, do not service the instrument unless you are qualified to do so. 1.
123 Service Manual 1.5 Impaired Safety Whenever it is likely that safety has been impaired, the instrument must be turned off and disconnected from line power. The matter should then be referred to qualified technicians. Safety is likely to be impaired if, for example, the instrument fails to perform the intended measurements or shows visible damage. 1.
Chapter 2 Characteristics Title 2.1 Introduction................................................................................................. 2.2 Dual Input Oscilloscope.............................................................................. 2.2.1 Vertical ................................................................................................ 2.2.2 Horizontal ............................................................................................ 2.2.3 Trigger ......................
Characteristics 2.1 Introduction 2 2.1 Introduction Performance Characteristics FLUKE guarantees the properties expressed in numerical values with the stated tolerance. Specified non-tolerance numerical values indicate those that could be nominally expected from the mean of a range of identical ScopeMeter test tools. Environmental Data The environmental data mentioned in this manual are based on the results of the manufacturer’s verification procedures.
123 Service Manual Max. Input Voltage A and B direct or with test leads 600 Vrms with BB120 300 Vrms (For detailed specifications see “2.7 Safety”) Max. Floating Voltage from any terminal to ground 600 Vrms, up to 400Hz Resolution 8 bit Vertical Accuracy ±(1% + 0.05 range/div) Max. Vertical Move ±4 divisions Max. Base Line Jump After changing time base or sensitivity Normal & Single mode ±0.04 divisions (= ±1 pixel) 2.2.
Characteristics 2.3 Dual Input Meter 2 Sensitivity A and B @ DC to 5 MHz @ 25 MHz @ 40 MHz 0.5 divisions or 5 mV 1.5 divisions 4 divisions Voltage level error ±0.5 div. max. Slope Positive, Negative Video on A Interlaced video signals only Modes Standards Polarity Sensitivity Lines, Line Select PAL , NTSC, PAL+, SECAM Positive, Negative 0.6 divisions sync. 2.2.
123 Service Manual True RMS Voltages (VAC and VAC+DC) Ranges 500 mV, 5V, 50V, 500V, 1250V Accuracy for 5 to 100% of range DC coupled: DC to 60 Hz (VAC+DC) 1 Hz to 60 Hz (VAC) AC or DC coupled: 60 Hz to 20 kHz 20 kHz to 1 MHz 1 MHz to 5 MHz 5 MHz to 12.5 MHz 5 MHz to 20 MHz AC coupled with 1:1 (shielded) test leads: 60 Hz (6 Hz with 10:1 probe) 50 Hz (5 Hz with 10:1 probe) 33 Hz (3.3 Hz with 10:1 probe) 10 Hz (1 Hz with 10:1 probe) ±(1% +10 counts) ±(1% +10 counts) ±(2.
Characteristics 2.3 Dual Input Meter 2 Duty Cycle (DUTY) Range 2% to 98% Frequency Range for Continuous Autoset 15Hz (1Hz) to 30 MHz Accuracy: @1Hz to 1 MHz @1 MHz to 10 MHz @10 MHz to 40 MHz Resolution ±(0.5% +2 counts) ±(1.0% +2 counts) ±(2.5% +2 counts) 0.1% Pulse Width (PULSE) Frequency Range for Continuous Autoset 15Hz (1Hz) to 30 MHz Accuracy: @1Hz to 1 MHz @1 MHz to 10 MHz @10 MHz to 40 MHz Full Scale reading Amperes (AMP) ±(0.5% +2 counts) ±(1.0% +2 counts) ±(2.
123 Service Manual 2.3.2 Input A Ohm (Ω Ω) Ranges 500Ω, 5 kΩ, 50 kΩ, 500 kΩ, 5 MΩ, 30 MΩ Accuracy ±(0.6% +5 counts) Full Scale Reading 500Ω to 5 MΩ 30 MΩ 5000 counts 3000 counts Measurement Current 0.5 mA to 50 nA decreases with increasing ranges Open Circuit Voltage <4V Continuity (CONT) Beep 30Ω ± 5Ω in 50Ω range Measurement Current 0.5 mA Detection of shorts of ≥1 ms Diode Maximum Voltage: @0.5 mA @open circuit >2.8V <4V Accuracy ±(2% +5 counts) Measurement Current 0.
Characteristics 2.4 Miscellaneous Touch Hold (on A) Captures and freezes a stable measurement result. Beeps when stable. Touch Hold works on the main meter reading , with threshholds of 1 Vpp for AC signals and 100mV for DC signals. TrendPlot Graphs meter readings of the Min and Max values from 15 s/div (120 seconds) to 2 days/div (16 days) with time and date stamp. Automatic vertical scaling and time compression. Displays the actual and Minimum, Maximum, or average (AVG) reading.
123 Service Manual Interface To Printer To PC RS-232, optically isolated supports Epson FX, LQ, and HP Deskjet, Laserjet, and Postscript Serial via PM9080 (optically isolated RS232 adapter/cable, optional). Parallel via PAC91 (optically isolated print adapter cable, optional). Dump and load settings and data. Serial via PM9080 (optically isolated RS232 adapter/cable, optional), using SW90W (FlukeView software for Windows). 2.
Characteristics 2.6 Service and Maintenance 2 2.6 Service and Maintenance Calibration Interval 1 Year 2.7 Safety Designed for measurements on 600 Vrms Category III Installations, Pollution Degree 2, per: • ANSI/ISA S82.01-1994 • EN61010-1 (1993) (IEC1010-1) • CAN/CSA-C22.2 No.1010.1-92 (including approval) • UL3111-1 (including approval) Max. Input Voltage Input A and B Direct on input or with leads 600 Vrms. For derating see Figure 2-1. With Banana-to-BNC Adapter BB120 300V rms.
123 Service Manual 2.8 EMC Immunity The Fluke 123, including standard accessories, conforms with the EEC directive 89/336 for EMC immunity, as defined by IEC1000-4-3, with the addition of tables 2-1 to 2-3. Trace Disturbance with STL120 See Table 2-1 and Table 2-2. Table 2-1.
Chapter 3 Circuit Descriptions Title 3.1 Introduction................................................................................................. 3.2 Block Diagram ............................................................................................ 3.2.1 Channel A, Channel B Measurement Circuits..................................... 3.2.2 Trigger Circuit ..................................................................................... 3.2.3 Digital Circuit .................................
123 Service Manual ST7965.EPS Figure 3-1.
Circuit Descriptions 3.1 Introduction 3 3.1 Introduction Section 3.2 describes the functional block diagram shown in Figure 3-1. It provides a quick way to get familiar with the test tool basic build-up. Section 3.3 describes the principle of operation of the test tool functions in detail, on the basis of the circuit diagrams shown in Figures 9-1 to 9-5. For all measurements, input signals are applied to the shielded input banana jackets. Traces and readings are derived from the same input signal samples.
123 Service Manual 3.2.1 Channel A, Channel B Measurement Circuits The Channel A and Channel B circuit are similar. The only difference is that Channel A can do all measurements, whereas Channel B does not provide resistance, diode, and capacitance measurements. Volts, and derived measurements (e.g. current with optional probe) The input voltage is supplied to the C-ASIC, via the LF and HF path.
Circuit Descriptions 3.2 Block Diagram 3 Note External triggers, supplied via the optical interface RXDA line, are buffered by the P-ASIC, and then supplied to the D-ASIC (RXD signal). The TRIG-A input is also used for capacitance measurements, as described in Section 3.2.1. The T-ASIC includes a constant current source for resistance and capacitance measurements. The current is supplied via the GENOUT output and the Ω/F relays to the unknown resistance Rx or capacitance Cx connected to Input A.
123 Service Manual drivers, and a fluorescent back light lamp. As the module is not repairable, no detailed description and diagrams are provided. The back light supply voltage is generated by the back light converter on the POWER part. The keys of the keyboard are arranged in a matrix. The D-ASIC drives the rows and scans the matrix. The contact pads on the keyboard foil are connected to the main board via connector X452.
Circuit Descriptions 3.2 Block Diagram 3 A linear regulator in the P-ASIC derives a +12V voltage from the power adapter voltage. The +12V is used as programming voltage for the Flash EPROM on the Digital part. 3.2.5 Start-up Sequence, Operating Modes The test tool sequences through the following steps when power is applied (see also Figure 3-2): 1. The P-ASIC is directly powered by the battery or power adapter voltage VBAT.
123 Service Manual Battery Refresh In the following situations the batteries will need a deep discharge-full charge cycle, called a “refresh”: • every 50 not-full discharge/charge cycles, or each 6 months. This prevents battery capacity loss due to the memory effect. • after the battery has been removed, as the test tool does not know the battery status then. The user will be prompted for this action when he turns the test tool on, directly following the start up screen.
Circuit Descriptions 3.3 Detailed Circuit Descriptions 3 Table 3-2. Fluke 123 Operating Modes Mode Conditions Remark Idle mode No power adapter and no battery no activity Off mode No power adapter connected, battery installed, test tool off P-ASIC & D-ASIC powered (VBAT & +3V3GAR).
123 Service Manual As described in Section 3.2.5, the test tool operating mode depends on the connected power source. The voltage VBAT is supplied either by the power adapter via V506/L501, or by the battery pack. It powers a part of the P-ASIC via R503 to pin 60 (VBATSUP). If the test tool is off, the Fly Back Converter is off, and VBAT powers the D-ASIC via transistor V569 (+3V3GAR). This +3V3GAR voltage is controlled and sensed by the P-ASIC. If it is NOT OK (<3.05V), the output VGARVAL (pin 64) is low.
Circuit Descriptions 3.3 Detailed Circuit Descriptions 3 line and filter R534-C534 to pin 80. A control loop in the control circuit adjusts the actual charge current to the required value. The filtered CHARCUR voltage range on pin 80 is 0... 2.7V for a charge current from 0.5A to zero. A voltage of 0V complies to 0.5A (fast charge), 1.5V to 0.2A (top off charge), 2.3V to 0.06A (trickle charge), and 2.7V to 0A (no charge).
123 Service Manual CHAGATE control signal To make the FET conductive its Vgs (gate-source voltage) must be negative. For that purpose, the CHAGATE voltage must be negative with respect to VCHDRIVE. The P-ASIC voltage VCHDRIVE also limits the swing of the CHAGATE signal to 13V. VCHDRIVE V506 “OFF” VCHDRIVE -13V V506 “ON” 10 µs Figure 3-4. CHAGATE Control Voltage +3V3GAR Voltage When the test tool is not turned on, the Fly Back Converter does not run.
Circuit Descriptions 3.3 Detailed Circuit Descriptions 3 the sense resistor (FLYSENSP) is compared to the IMAXFLY voltage. If the current exceeds the set limit, FET V554 will be turned off. Another internal current source supplies a current to R558. This resulting voltage is a reference for the maximum allowable output voltage (VOUTHI). The -3V3A output voltage (M3V3A) is attenuated and level shifted in the P-ASIC, and then compared to the VOUTHI voltage.
123 Service Manual knows now if the previous input voltage step caused the comparator output to switch. By increasing the voltage steps, the voltage level can be approximated within the smallest possible step of the SADCLEV voltage. From its set SADCLEVD duty cycle, the DASIC knows voltage level of the selected input.
Circuit Descriptions 3.3 Detailed Circuit Descriptions 3 In PCB versions 8 and newer R605 and R606 provide a more reliable startup of the backlight converter. Voltage at T600 pin 4 Voltage AOUT Voltage BOUT Voltage COUT zero detect zero detect Figure 3-7. Back Light Converter Voltages 3.3.2 Channel A - Channel B Measurement Circuits The description below refers to circuit diagrams Figure 9-1 and Figure 9-2. The Channel A and Channel B circuits are almost identical.
123 Service Manual LF input The LF-input (pin 42) is connected to a LF decade attenuator in voltage mode, or to a high impedance buffer for resistance and capacitance measurements. The LF decade attenuator consists of an amplifier with switchable external feedback resistors R131 to R136. Depending on the selected range the LF attenuation factor which will be set to 110-100-1000-10,000. The C-ASIC includes a LF pre-amplifier with switchable gain factors for the 1-2-5 steps.
Circuit Descriptions 3.3 Detailed Circuit Descriptions 3 CALSIG input pin 36 The reference circuit on the TRIGGER part supplies an accurate +1.23V DC voltage to the CALSIG input pin 36 via R141. This voltage is used for internal calibration of the gain, and the capacitance measurement threshold levels. A reference current Ical is supplied by the T-ASIC via R144 for calibration of the resistance and capacitance measurement function. For ICAL see also Section 3.3.3.
123 Service Manual Table 3-3. Voltage Ranges And Trace Sensitivity range 50 mV 50 mV 50 mV 500 mV 500 mV 500 mV 5V 5V trace ../div 5 mV 10 mV 20 mV 50 mV 100 mV 200 mV 500 mV 1V range 5V 50V 50V 50V 500V 500V 500V 1250V trace ../div 2V 5V 10V 20V 50V 100V 200V 500V During measuring, input voltage measurements, gain measurements, and zero measurements are done.
Circuit Descriptions 3.3 Detailed Circuit Descriptions 3 and the time lapse between two different known threshold crossings is measured. Thus dV, I and dt are known and the capacitance can be calculated. The unknown capacitance Cx is connected to the red Input A safety banana socket, and the black COM input. The T-ASIC supplies a constant current to Cx via relay contacts K173, and protection PTC resistor R172. The voltage on Cx is supplied to two comparators in the C-ASIC via the LF input.
123 Service Manual Table 3-5. Capacitance Ranges, Current, and Pulse Width Range 50 nF 500 nF 5000 nF 50 µF 500 µF Current µA 0.5 µA 5 µA 50 µA 500 µA 500 µA Pulse width at Full Scale 25 ms 25 ms 25 ms 25 ms 250 ms To protect the current source if a voltage is applied to the input, a PTC resistor R172, and a protection circuit on the TRIGGER part, are provided (see Section 3.3.3). Frequency & Pulse Width Measurements The input voltage is measured as described above.
Circuit Descriptions 3.3 Detailed Circuit Descriptions 3 Triggering Figure 3-10 shows the block diagram of the T-ASIC trigger section. TRIGLEV1 TRIGLEV2 TRIG A TRIG B TRIGGER ASIC OQ0257 trigger section 10 35 11 42 13 ALLTRIG 15 analog DUALTRIG trigger path select logic synchronize delta-t 38 16 12 TVSYNC sync. pulse separator TVOUT freq. detect TRIGQUAL 34 TRIGDT 39 colour filter +/- amplifier ALLTRIG 29 HOLDOFF SMPCLK DACTEST Figure 3-10.
123 Service Manual from ALLTRIG, e.g. on each 10th ALLTRIG pulse a TRIGQUAL pulse is given. The TRIGQUAL is supplied this to the synchronize/delta-T circuit via the select logic. 3. Normal triggering. The ALLTRIG signal is supplied to the synchronization/delta-T circuit. The ALLTRIG signal includes all triggers. It is used by the D-ASIC for signal analysis during AUTOSET. Traditionally a small trigger gap is applied for each the trigger level.
Circuit Descriptions 3.3 Detailed Circuit Descriptions 3 DACTEST output A frequency detector in the T-ASIC monitors the ALLTRIG signal frequency. If the frequency is too high to obtain a reliable transmission to the D-ASIC, the DACTEST output pin 29 will become high. The DACTEST signal is read by the D-ASIC via the slow ADC on the Power part. It and indicates that the D-ASIC cannot use the ALLTRIG signal (e.g. for qualified triggering).
123 Service Manual Reference Voltage Circuit This circuit derives several reference voltages from the 1.23V main reference source. REFPWM2 +3.3V +1.23V 73 REFP 72 V301 71 REFP R309 R311 R312 R308 -1.23V + - 1.23V +3.3V P-ASIC OQ0256 R307 62 + GAINPWM 56 REFPWM1 55 GNDREF 57 GAINREFN 63 - + - REFN 64 + GAINADCB 54 - 3 R303 REFADCB 53 + +1.6V 2 R306 R310 +0.1V 1 T-ASIC OQ0257 R302 GAINADCT 52 R301 R305 REFADCT 51 REFATT 8 - 4 Figure 3-12.
Circuit Descriptions 3.3 Detailed Circuit Descriptions 3 Amplifier 3 and 4 and connected resistors supply the REFADCT and REFADCB reference voltages for the ADC’s. Both voltages directly influence the gain accuracy of the ADC’s. The T-ASIC can select some of the reference voltages to be output to pin 8 (REFATT). The REFATT voltage is used for internal calibration of the input A and B overall gain. Tracerot Signal The T-ASIC generates the TRACEROT signal, used by the C-ASIC’s.
123 Service Manual The sample rate depends on the sample clock supplied to pin 24. The sample rate is 5 MHz or 25 MHz, depending on the instrument mode. The ADC input signal is sampled on the rising edge of the sample clock. The digital equivalent of this sample is available on the outputs D0-D7 with a delay of 6 sample clock cycles. The reference voltages REFADCT and REFADCB determine the input voltage swing that corresponds to an output data swing of 00000000 to 11111111 (D0-D7).
Circuit Descriptions 3.3 Detailed Circuit Descriptions 3 ROM control for PCB versions < 8 The Flash ROM mode depends on the output signal of the RESET ROM circuit, RP#: • RP#>2V, software can run. True if +12V present and/or ROMRST is high. • RP#<2V, software cannot run. True if +12V not present and/or ROMRST is low (test tool off). • RP#>12V, software can run, and ROM can be programmed. True if +12V is present.
123 Service Manual FRAME Common Driver LnCl M Column Driver Din DCl LnCl Do Di Common Driver LnCl M X1..80 Do Di X81..160 Common Driver LnCl M X161..240 TOP Y1..80 M Carry Column Driver Din DCl LnCl LEFT Y81..160 FRONTVIEW M LCD Carry LCDAT0-3 Column Driver Din DATACLK0 DCl LINECLK M LnCl M Y161..240 PIXEL (0,0) Figure 3-13. LCD Control Each 14 ms the LCD picture is refreshed during a frame.
Circuit Descriptions 3.3 Detailed Circuit Descriptions 3 The keys are arranged in a 6 rows x 6 columns matrix. If a key is pressed, the D-ASIC drives the rows, and senses the columns. The ON/OFF key is not included in the matrix. This key toggles a flip-flop in the D-ASIC via the ONKEY line (D-ASIC pin 72). As the D-ASIC is permanently powered, the flip-flop can signal the test tool on/off status.
123 Service Manual SDA-SCL Serial Bus The unidirectional SDA-SCL serial bus (pin 56, 57) is used to send control data to the CASIC’s (e.g. change attenuation factor), and the T-ASIC (e.g. select other trigger source). The SDA line transmits the data bursts, the SCL line transmits the synchronization clock (1.25 MHz). Probe Detection Via the probe detection inputs PROBE-A and PROBE-B (pin 54, 55), the D-ASIC detects if the Input A and B probes have been connected/disconnected.
Chapter 4 Performance Verification Title 4.1 Introduction................................................................................................. 4.2 Equipment Required For Verification ........................................................ 4.3 How To Verify ............................................................................................ 4.4 Display and Backlight Test ......................................................................... 4.5 Input A and Input B Tests ............
Performance Verification 4.1 Introduction 4 4.1 Introduction Warning Procedures in this chapter should be performed by qualified service personnel only. To avoid electrical shock, do not perform any servicing unless you are qualified to do so. The test tool should be calibrated and in operating condition when you receive it. The following performance tests are provided to ensure that the test tool is in a proper operating condition.
123 Service Manual Follow these general instructions for all tests: • For all tests, power the test tool with the PM8907 power adapter. The battery pack must be installed. • Allow the 5500A to satisfy its specified warm-up period. • For each test point , wait for the 5500A to settle. • Allow the test tool a minimum of 20 minutes to warm up. 4.4 Display and Backlight Test Proceed as follows to test the display and the backlight: 1. Press TO TURN THE Test tool on. 2.
Performance Verification 4.5 Input A and Input B Tests 4 12. Press (CAL) . The test tool shows the display test pattern shown in Figure 4-1, at default contrast. Observe the test pattern closely, and verify that the no pixels with abnormal contrast are present in the display pattern squares. Also verify that the contrast of the upper left and upper right square of the test pattern are equal. 13. Press . The test pattern is removed; the test tool shows Contrast (CL 0120):MANUAL 14. Press (CAL) .
123 Service Manual ST7968.CGM Figure 4-2. Menu item selection If an item is selected, it is marked by ■. Not selected items are marked by . If a is pressed, the item remains selected. selected item is highlighted, an then You can also navigate through the menu using you must press . . To conform the highlighted item 4.5.1 Input A and B Base Line Jump Test Proceed as follows to check the Input A and Input B base line jump: 1.
Performance Verification 4.5 Input A and Input B Tests 5. Using 4 set the time base to 10 ms/div. toggle the sensitivity of Input A between 5 and 10 mV/div. After 6. Using changing the sensitivity wait some seconds until the trace has settled. Observe the Input A trace, and check to see if it is set to the same position after changing the sensitivity. The allowed difference is ±0.04 division (= 1 pixel). 7. Using toggle the sensitivity of Input B between 5 and 10 mV/div.
123 Service Manual 8. Verify that the signal is well triggered. If it is not, press to enable the up/down arrow keys for Trigger Level adjustment; adjust the trigger level and verify that the signal will be triggered now. 9. Set the 5500A to source a 40 MHz leveled sine wave of 1.8V peak-to-peak. 10. Adjust the amplitude of the sine wave to 4 divisions on the test tool display. 11. Verify that the signal is well triggered.
Performance Verification 4.5 Input A and Input B Tests 4 6. Continue through the test points. 7. When you are finished, set the 5500A to Standby. Table 4-1. Input A,B Frequency Measurement Accuracy Test 5500A output, 600 mVpp Input A, B Reading 1 MHz 0.993 to 1.007 MHz 10 MHz 09.88 to 10.12 MHz 40 MHz 38.98 to 41.02 MHz Note Duty Cycle and Pulse Width measurements are based on the same principles as Frequency measurements.
123 Service Manual 4. Set the 5500A frequency according to the first test point in Table 4-1. 5. Observe the Input B main reading on the test tool and check to see if it is within the range shown under the appropriate column. 6. Continue through the test points. 7. When you are finished, set the 5500A to Standby. 4.5.6 Input B Frequency Response Upper Transition Point Test Proceed as follows to test the Input B frequency response upper transition point: 1.
Performance Verification 4.5 Input A and Input B Tests • Press 4 to open the TRIGGER menu, and choose: INPUT: ■ B | SCREEN UPDATE: ■ FREE RUN | AUTO RANGE: ■ >15HZ 3. Set the 5500A to source a 5 MHz leveled sine wave of 100 mV peak-to-peak (SCOPE output, MODE levsin). 4. Adjust the amplitude of the sine wave to 0.5 division on the display. 5. Verify that the signal is well triggered.
123 Service Manual • Move the Input A and Input B ground level (indicated by zero icon center grid line. Proceed as follows: ) to the Press to enable the arrow keys for moving the Input A ground level. Press to enable the arrow keys for moving the Input B ground level. Using the keys move the ground level. • Using change the time base to select manual time base ranging, and lock the time base on 10 ms/div. • Press to open the SCOPE INPUTS menu.
Performance Verification 4.5 Input A and Input B Tests 4 15. Verify that the 5500A voltage is between +1.5V and +2.5V when the test tool is triggered. To repeat the test, start at step 12. 16. Set the 5500A to Standby. 17. Press to clear the display. 18. Select the following test tool setup: • Press to open the SCOPE INPUTS menu.
123 Service Manual 4.5.9 Input A and B DC Voltage Accuracy Test WARNING Dangerous voltages will be present on the calibration source and connecting cables during the following steps. Ensure that the calibrator is in standby mode before making any connection between the calibrator and the test tool. Proceed as follows: 1. Connect the test tool to the 5500A as for the previous test (see Figure 4-5). 2. Select the following test tool setup: • Press select auto ranging (AUTO in top of display).
Performance Verification 4.5 Input A and Input B Tests 4 Table 4-2. Volts DC Measurement Verification Points 1) Sensitivity (Oscilloscope) Range (Meter) 5500A output, V DC 5 mV/div 500 mV 15 mV 014.4 to 015.6 2) 10 mV/div 500 mV 30 mV 029.3 to 030.7 2) 20 mV/div 500 mV 60 mV 059.2 to 060.8 50 mV/div 500 mV 150 mV 148.7 to 151.3 100 mV/div 500 mV 300 mV 298.0 to 302.0 200 mV/div 500 mV 500 mV 497.0 to 503.0 -500 mV -497.0 to -503.0 0 mV -000.5 to + 000.
123 Service Manual 2. Select the following test tool setup: • to select auto ranging (AUTO in top of display). Press Do not press anymore! • Press to open the INPUT A MEASUREMENTS menu, and choose: MEASURE on A: ■ VAC • Press to open the INPUT B MEASUREMENTS menu, and choose: INPUT B: ■ ON | MEASURE on B: ■ VAC • Move the Input A and Input B ground level (indicated by zero icon center grid line. Proceed as follows: ) to the Press to enable the arrow keys for moving the Input A ground level.
Performance Verification 4.5 Input A and Input B Tests • Press 4 to open the SCOPE INPUTS menu, and choose: INPUT A: ■ AC | ■ NORMAL | INPUT B: ■ AC | NORMAL■ • Press to open the SCOPE INPUTS menu. • Press to open the TRIGGER menu, and choose: INPUT: A | SCREEN UPDATE: ■ FREE RUN | AUTO RANGE: ■ > 1HZ 3. Set the 5500A to source an AC voltage, to the first test point in Table 4-4 (NORMAL output, WAVE sine). 4.
123 Service Manual From the INPUT B PEAK sub-menu choose: PEAK TYPE : ■ PEAK-PEAK • Using select 1V/div for input A and B. 3. Set the 5500A to source a sine wave, to the first test point in Table 4-5 (NORMAL output, WAVE sine). 4. Observe the Input A and Input B main reading and check to see if it is within the range shown under the appropriate column. 5. Continue through the test points. 6. When you are finished, set the 5500A to Standby. Table 4-5.
Performance Verification 4.5 Input A and Input B Tests 4 4.5.14 Input A and B High Voltage AC/DC Accuracy Test Warning Dangerous voltages will be present on the calibration source and connecting cables during the following steps. Ensure that the calibrator is in standby mode before making any connection between the calibrator and the test tool. Proceed as follows to test the Input A&B High Voltage AC and DC Accuracy: 1. Connect the test tool to the 5500A as shown in Figure 4-6. ST8129.CGM Figure 4-6.
123 Service Manual 3. Using set the Input A and B sensitivity to the first test point in Table 4-7. The corresponding range is shown in the second column of the table. 4. Set the 5500A to source the required AC voltage (NORMAL output, WAVE sine). 5. Observe the Input A and B main reading (V DC) and secondary reading (V-AC) and check to see if it is within the range shown under the appropriate column. 6. Continue through the test points. 7. When you are finished, set the 5500A to Standby Table 4-7.
Performance Verification 4.5 Input A and Input B Tests 4 2. Select the following test tool setup: • Press to select auto ranging (AUTO in top of display). • Press to open the INPUT A MEASUREMENTS menu, and choose: MEASURE on A: ■ OHM Ω 3. Set the 5500A to the first test point in Table 4-8. Use the 5500A “COMP 2 wire” mode for the verifications up to and including 50 kΩ. For the higher values, the 5500A will turn off the “COMP 2 wire” mode. 4.
123 Service Manual 4.5.17 Diode Test Function Test Proceed as follows to test the Diode Test function : 1. Connect the test tool to the 5500A as for the previous test (see Figure 4-7). 2. Press to open the INPUT A MEASUREMENTS menu, and choose: MEASURE on A: ■ DIODE 3. Set the 5500A to 1 kΩ Ω. Use the 5500A “COMP 2 wire” mode. 4. Observe the main reading and check to see if it is within 0.425 and 0.575V. 5. Set the 5500A to 1V DC. 6. Observe the main reading and check to see if it is within 0.975 and 1.
Performance Verification 4.5 Input A and Input B Tests 4 Table 4-9. Capacitance Measurement Verification Points 5500A output Reading 40 nF 39.10 to 40.90 300 nF 293.0 to 307.0 3 µF 2.930 to 3.070 30 µF 29.30 to 30.70 300 µF 293.0 to 307.0 0 (remove test tool input connections ) 00.00 to 00.10 (see steps 7...10) 4.5.19 Video Trigger Test Only one of the systems NTSC, PAL, or SECAM has to be verified. Proceed as follows: 1.
123 Service Manual • Using • Using • Press • Using set the Input A sensitivity to 200 mV/div. select 20 µs/div. to enable the arrow keys for selecting the video line number. select the line number: 622 for PAL or SECAM 525 for NTSC. 3. Set the TV Signal Generator to source a signal with the following properties: • the system selected in step 2 • gray scale • video amplitude 1V (5 divisions on the test tool) • chroma amplitude zero. 4.
Performance Verification 4.5 Input A and Input B Tests PAL310.BMP Figure 4-11. Test Tool Screen for PAL/SECAM line 310 4 NTSC262.BMP Figure 4-12. Test Tool Screen for NTSC line 262 7. Apply the inverted TV Signal Generator signal to the test tool. You can invert the signal by using a Banana Plug to BNC adapter (Fluke PM9081/001) and a Banana Jack to BNC adapters (Fluke PM9082/001), as shown in Figure 4-13. ST8142.CGM Figure 4-13. Test Tool Input A to TV Signal Generator Inverted 8.
123 Service Manual SYSTEM: ■ NTSC or ■ PAL or ■ SECAM or ■ PALplus | LINE: ■ SELECT | • POLARITY: ■ NEGATIVE • Using • Using 9. Using set the Input A sensitivity to 200 mV/div. select 20 µs/div. select the line number: 310 for PAL or SECAM 262 for NTSC 10. Observe the trace, and check to see if the test tool triggers on: line number 311 for PAL or SECAM, see Figure 4-14 line number 262 for NTSC, see Figure 4-15. PAL310I..BMP Figure 4-14.
Chapter 5 Calibration Adjustment Title 5.1 General ........................................................................................................ 5.1.1 Introduction.......................................................................................... 5.1.2 Calibration number and date................................................................ 5.1.3 General Instructions............................................................................. 5.2 Equipment Required For Calibration.....
Calibration Adjustment 5.1 General 5 5.1 General 5.1.1 Introduction The following information, provides the complete Calibration Adjustment procedure for the Fluke 123 test tool. The test tool allows closed-case calibration using known reference sources. It measures the reference signals, calculates the correction factors, and stores the correction factors in RAM. After completing the calibration, the correction factors can be stored in FlashROM.
123 Service Manual 5.2 Equipment Required For Calibration The primary source instrument used in the calibration procedures is the Fluke 5500A. If a 5500A is not available, you can substitute another calibrator as long as it meets the minimum test requirements. • Fluke 5500A Multi Product Calibrator, including 5500A-SC Oscilloscope Calibration Option. • Stackable Test Leads (4x), supplied with the 5500A. • 50Ω Coax Cables (2x), Fluke PM9091 or PM9092.
Calibration Adjustment 5.3 Starting Calibration Adjustment 5 4. Continue with either a. or b. below: a. To calibrate the display contrast adjustment range and the default contrast, go to Section 5.4 Contrast Calibration Adjustment. This calibration step is only required if the display cannot made dark or light enough, or if the display after a test tool reset is too light or too dark. b. To calibrate the test tool without calibrating the contrast , go to Section 5.5 Warming Up & Pre-calibration.
123 Service Manual 5.4 Contrast Calibration Adjustment After entering the Maintenance mode, the test tool display shows Warming Up (CL 0200):IDLE (valid). Do not press now! If you did, turn the test tool off and on, and enter the Maintenance mode again. Proceed as follows to adjust the maximum display darkness (CL0100), the default contrast (CL0110) , and the maximum display brightness (CL0120). 1. Press a three times to select the first calibration step.
Calibration Adjustment 5.5 Warming Up & Pre-Calibration 5 5.5 Warming Up & Pre-Calibration After entering the Warming-Up & Pre-Calibration state, the display shows: WarmingUp (CL 0200):IDLE (valid) or (invalid). You must always start the Warming Up & Pre Calibration at Warming Up (CL0200) . Starting at another step will make the calibration invalid! Proceed as follows: 1. Remove all input connections from the test tool. to start the Warming-Up & Pre-Calibration. 2.
123 Service Manual 3. Set the 5500A to source a 1 kHz fast rising edge square wave (Output SCOPE, MODE edge) to the first calibration point in Table 5-1. 4. Set the 5500A in operate (OPR). to start the calibration. 5. Press 6. Wait until the display shows calibration status READY . to select the next calibration step, set the 5500A to the next calibration 7. Press point, and start the calibration. Continue through all calibration points in Table 5-1. 8.
Calibration Adjustment 5.6 Final Calibration 5 Table 5-2. HF Gain Calibration Points Slow Cal step 5500A Setting (1 kHz, MODE wavegen, WAVE square) Test Tool Input Signal Requirements (1 kHz square, trise<2 µs, flatness after rising edge: <0.5% after 4 µs) HF-Gain AB (CL 0609) 25V 25V For firmware V01.
123 Service Manual 4. Set the 5500A to operate (OPR). to start the calibration. 5. Press The Delta T gain, Trigger Delay (CL0720), and Pulse Adjust Input A (CL0640) will be calibrated. (For firmware V01.00 CL0640 is a separate step!). 6. Wait until the display shows Pulse Adj A (CL 0640):READY. (For firmware V01.00 wait until the display shows Delay (CL 0720):READY 7. When you are finished, set the 5500A to Standby. 8. Continue at Section 5.6.4. (For firmware V01.00 continue at Section 5.6.3). 5.6.
Calibration Adjustment 5.6 Final Calibration 5 5.6.4 Pulse Adjust Input B Proceed as follows to do the Pulse Adjust Input A calibration: 1. Press to select calibration step Pulse Adj B (CL 0660):IDLE 2. Connect the test tool to the 5500A as shown in Figure 5-5. ST8005.CGM Figure 5-5. 5500A Scope Output to Input B 3. Set the 5500A to source a 1V, 1 MHz fast rising square wave (SCOPE output, MODE edge) (rise time ≤ 1 ns, aberrations <2% pp). 4. Set the 5500A to operate (OPR). 5.
123 Service Manual ST8001.CGM Figure 5-6. Volt Gain Calibration Input Connections <300V 3. Set the 5500A to supply a DC voltage, to the first calibration point in Table 5-3. 4. Set the 5500A to operate (OPR). 5. Press to start the calibration. 6. Wait until the display shows calibration status :READY. 7. Press to select the next calibration step, set the 5500A to the next calibration point, and start the calibration. Continue through all calibration points of Table 5-3 8.
Calibration Adjustment 5.6 Final Calibration 5 10. Connect the test tool to the 5500A as shown in Figure 5-7. ST8129.CGM Figure 5-7. Volt Gain Calibration Input Connections 500V 11. Set the 5500A to supply a DC voltage of 500V. 12. Set the 5500A to operate (OPR). to start the calibration. 13. Press Gain DMM (CL0814) and Gain DMM (CL0815) will be calibrated now. 14. Wait until the display shows calibration status Gain DMM (CL0815):READY. 15. Set the 5500A to 0V (zero) and to Standby. 16.
123 Service Manual 5.6.8 Gain Ohm Proceed as follows to do the Gain Ohm calibration: 1. Press to select calibration adjustment step Gain Ohm (CL 0860):IDLE 2. Connect the UUT to the 5500A as shown in Figure 5-8. Notice that the sense leads must be connected directly to the test tool. ST8003.CGM Figure 5-8. Four-wire Ohms calibration connections 3. Set the 5500A to the first test point in Table 5-4. Use the 5500A “COMP 2 wire” mode for the calibration adjustments up to and including 100 kΩ.
Calibration Adjustment 5.6 Final Calibration 5 5.6.9 Capacitance Gain Low and High Proceed as follows to do the Capacitance Gain calibration: 1. Press to select calibration adjustment step Cap. Low (CL 0900):IDLE 2. Connect the test tool to the 5500A as shown in Figure 5-9. ST8002.CGM Figure 5-9. Capacitance Gain Calibration Input Connections 3. Set the 5500A to supply 250 mV DC. 4. Set the 5500A to operate (OPR). 5. Press to start the calibration. 6. Wait until the display shows Cap.
123 Service Manual 5.6.11 Capacitance Gain Proceed as follows to do the Capacitance Gain calibration: to select calibration adjustment step Cap. Gain (CL 0960):IDLE 1. Press 2. Connect the test tool to the 5500A as shown in Figure 5-9 (Section 5.6.9). 3. Set the 5500A to 500 nF. 4. Set the 5500A to operate (OPR). 5. Press to start the calibration. 6. Wait until the display shows Cap. Gain (CL 0960):READY. 7. Continue at Section 5.7 to save the calibration data. 5.
Calibration Adjustment 5.7 Save Calibration Data and Exit 4. Press - 5 (YES) to save and exit. Notes The calibration number and date will be updated only if the calibration data have been changed and the data are valid. - The calibration data will change when a calibration adjustment has been done. The data will not change when just entering and then leaving the maintenance mode without doing a calibration adjustment.
Chapter 6 Disassembling the Test Tool Title 6.1. Introduction................................................................................................ 6.2. Disassembling Procedures ......................................................................... 6.1.1 Required Tools .................................................................................... 6.2.2 Removing the Battery Pack ................................................................. 6.2.3 Removing the Bail ....................
Disassembling the Test Tool 6.1. Introduction 6 6.1. Introduction This section provides the required disassembling procedures. The printed circuit board removed from the test tool must be adequately protected against damage. Warning To avoid electric shock, disconnect test leads, probes and power supply from any live source and from the test tool itself. Always remove the battery pack before completely disassembling the test tool.
123 Service Manual ST8014.EPS Figure 6-1.
Disassembling the Test Tool 6.2. Disassembling Procedures 6 6.2.5 Removing the Main PCA Unit Referring to Figure 6-1, use the following procedure to remove the main PCA unit. 1. Open the test tool (see Section 6.2.4). 2. Disconnect the LCD flex cable, and the keypad foil flat cable, see Figure 6-2. Unlock the cables by lifting the connector latch. The latch remains attached to the connector body. The keypad foil is provided with a shielding flap that covers the LCD flat cable.
123 Service Manual 6.2.6 Removing the Display Assembly Caution Read the Caution statement in Section 6.5 when installing the display assembly. An incorrect installation can damage the display assembly. There are no serviceable parts in the display assembly. Referring to Figure 6-1, use the following procedure to remove the display assembly. 1. Remove the main PCA unit (see Section 6.2.5). 2. The keypad pressure plate (item 9) is captivated by four plastic keeper tabs in the top case.
Disassembling the Test Tool 6.3 Disassembling the Main PCA Unit 6 Note Each input banana jacket is provided with a rubber sealing ring (Input A,B item 9, COM input item 10). Ensure that the rings are present when reassembling the main PCA unit! Caution To avoid contaminating the main PCA with oil from your fingers, do not touch the contacts (or wear gloves). A contaminated PCA may not cause immediate instrument failure in controlled environments.
123 Service Manual 6.4 Reassembling the Main PCA Unit Reassembling the main PCA is the reverse of disassembly. However you must follow special precautions when reassembling the main PCA unit. 1. Ensure the input banana jacks have the rubber sealing ring in place (Input A, B item 9, COM input item 10, see Figure 4-6). 2. Do not forget to install the power connector insulator (item 3) and the LED holder (item 6). 3.
Disassembling the Test Tool 6.5 Reassembling the Test Tool 6 7. Clean the display glass with a moist soft cloth if necessary. Install the display assembly. Ensure that the display is secured correctly by the four alignment tabs in the top case. It is secured correctly when it cannot be moved horizontally. 8. Install the keypad pressure plate. Press the plate firmly, and slide it under the four plastic keeper tabs in the top case. 9. Install the main PCA unit, and re-attach the cables.
Chapter 7 Corrective Maintenance Title 7.1 Introduction ....................................................................................................... 7.2 Starting Fault Finding........................................................................................ 7.3 Charger Circuit .................................................................................................. 7.4 Starting with a Dead Test Tool.......................................................................... 7.4.
Corrective Maintenance 7.1 Introduction 7 7.1 Introduction This chapter describes troubleshooting procedures that can be used to isolate problems with the test tool. Warning Opening the case may expose hazardous voltages. For example, the voltage for the LCD back light fluorescent lamp is >400V! Always disconnect the test tool from all voltage sources and remove the batteries before opening the case.
123 Service Manual 7.2 Starting Fault Finding. After each step, continue with the next step, unless stated otherwise. Power the test tool by the battery pack only, then by the power adapter only. 1. The test tool operates with the power adapter, but not with the battery only: install a charged battery (VBAT >4V), and check the connections between the battery and the test tool (X503, R504, R506, R507). 2.
Corrective Maintenance 7.3 Charger Circuit 7 If not correct, then: a. Check TP571 (+3V3GAR) for +3V3V. If not correct, possibly caused by V569, R580, TP571 short to ground, loose pins of N501, N501 defective. b. Check N501 pin 8 (VADALOW) for ≅ 1.1V If not correct: 1. Check R516 and connections. The P-ASIC supplies a current to R516. The current source uses REFPWM2 and IREF, see 2 and 3 below. 2. Check N501 pin 73 (REFPWM2) for +3V3. REFPWM2 is supplied by the P-ASIC.
123 Service Manual The CHARCURR voltage on TP531 is controlled by a pulse width modulated voltage (CHARCUR) from the D-ASIC D471 (pin 40). The D-ASIC measures the required signals needed for control, via the Slow ADC. 1. Check the SLOW ADC, see Section 7.5.3. 2. Check VGARVAL (N501 pin 64), for +3.3V. If not correct, check if the line is shorted to ground. If it is not, then replace N501. 3. Trace the CHARCURR signal path to R534, R 442 and D471 (D-ASIC) output pin 40. d. Check the following: 1.
Corrective Maintenance 7.4 Starting with a Dead Test Tool 7 pins of N501, or N501 defective. Check the +VD supply voltage on D-ASIC D471. Temporarily remove R470 to check for short circuit. 5. Check N501 pin 64 (VGARVAL) for +3.3V. If not correct: a. Check if the line is shorted to ground. b. Check N501 pin 73 (REFPWM2) for +3V3. REFPWM2 is supplied by N501, and derived from REFP on the reference circuit on the Trigger part. Check TP307 (N501 pin 72, REFP) for 1.22V, check V301/R307. If no 1.
123 Service Manual 7.5 Miscellaneous Functions 7.5.1 Display and Back Light Warning The voltage for the LCD back light fluorescent lamp is >400V! 1. Connect another LCD unit to see if the problem is caused by the LCD unit. The unit is not repairable. 2. Defective display Check the LCD control signals on measure spots MS401...MS422 (near to X453). Use a 10:1 probe with ground lead on the probe connected to the metal screening of the UUT. Notice that MS407 is missing ! a. MS422: LCDONOFF for +3.3V. b.
Corrective Maintenance 7.5 Miscellaneous Functions 7 c. Check TP601 and TP602 for a 7Vpp, 66 kHz, square wave. If not correct then check TP604 (TLON) for +3V3. If TLON is correct, then replace N600. d. Check (replace) V600, V602. 5. Backlight brightness control not correct: Check the TP605 (BACKBRIG, supplied by D-ASIC D471) for a 25 kHz, 3.3 V pulse signal. The duty cycle of the pulses controls the back light brightness. The backlight brightness increases with an increasing length of the high pulse.
123 Service Manual 4. Check TP528 (PWRONOFF) for +3V. If not correct, see Section 7.5.13 Power ON/OFF. 5. Check N501 pin 43 (COSC) for a triangle waveform, 50...100 kHz, +1.6V to +3.2V. If not correct check C553 and connections; check IREF, see step 6. If all correct, replace N501. 6. Check N501 pin 74 (IREF) for 1.6V. If not correct: a. Check N501 pin 73 (REFPWM2) for +3V3. REFPWM2 is supplied by N501, and derived from REFP on the reference circuit on the Trigger part.
Corrective Maintenance 7.5 Miscellaneous Functions 7 7.5.4 Keyboard Proceed as follows if one or more keys cannot be operated. 1. Replace the key pad, and the key pad foil to see if this cures the problem. 2. Press a key, and check ROW0...5 (measure spots MS432..MS437) for the signal shown below : +3.
123 Service Manual 2. Press Press to open the SCOPE INPUTS menu. to open the SCOPE OPTIONS ... menu, and select: SCOPE MODE: ■ ROLL MODE | WAVEFORM MODE: ■ NORMAL. 3. Apply a 1 kHz square wave to Input A and Input B, and change the test tool sensitivity (V/div) to make the complete square wave visible. 4. Check TP154 (ADC-A) and TP254 (ADC-B) for the signal shown below: Input positive. Input zero. Input negative 0.3 to 1.
Corrective Maintenance 7.5 Miscellaneous Functions 7 13. Check TP258 (TRACEROT supplied by T-ASIC N301) for the signals shown below (typical example at 20 ms/div.). +0.8V -0.8V ≈100 ms ≈5 ms If not correct check: TP432 (RAMPCLK) for 3V, 200 ns pulses. TP332 (RAMPCLK) for 0.6V, 200 ns pulses. TP331 (RSTRAMP) for +3V pulses, with varying pulse with and repetition rate. All pulses are supplied by D-ASIC-D471. 14. Check TP310 (REFATT) for alternating +1.2V and -1.2V pulses.
123 Service Manual 2. Press and select MEASURE on A: ■ CAP . Verify TP156 for +3.3 ... 0V pulses (repetition rate 100...200 ms): Zero scale (open input): pulse width approximately 30 µs. Full scale (for example 500 nF): pulse width approximately 25 ms. If not correct, most probably the C-ASIC N101 is defective. If correct, continue at Section 7.5.8 Trigger functions (pulse width is measured via the T-ASIC). 7.5.8 Trigger Functions 1. Press and select MEASURE on A: ■ VDC . 2.
Corrective Maintenance 7.5 Miscellaneous Functions 7 7. Supply a 15.6 kHz square wave of 20V (+10...-10V) to Input A, and Input B. 8. Check: a. TP308 (TVOUT) for 15.6 kHz, -0.8...+0.6V pulse (square wave) bursts (see figure below). 15.6 kHz ≈600 ms If not correct, N301 may be defective. b. TVSYNC, on R392/R397, for 15.6 kHz, +2.6...+3.3V pulse bursts. If not correct, V395 may be defective. c. TP311 (ALLTRIG) for 15.6 kHz, +3.3...0V pulse bursts. If not correct, N301 may be defective. d.
123 Service Manual 2. Check TP487 for +3V (supplied by D471). 7.5.12 RAM Test You can use the Microsoft TERMINAL program to test the RAM. Proceed as follows: 1. Connect the Test Tool to a PC via the Optical Interface Cable PM9080. 2.
Corrective Maintenance 7.6 Loading Software 7 7.5.14 PWM Circuit 1. Check the PWM control signals generated by D471. The signals must show 0...3V pulses, with variable duty cycle, and a frequency of 100, 25, or 6 kHz: a. CHARCURD, CONTR-D ≅ 100 kHz b. SADCLEV, POS A-D, BACKBRIG, POS B-D, TRIGLEV2D, TRIGLEV1D, HO-RNDM ≅ 25 kHz c. OFFSETA-D, OFFSETB-D ≅ 6 kHz 2. If not correct, check: a. TP306 (REFPWM2) for +3.3V (used for CHARCURD SADCLEV) b. TP304 (REFPWM1) for +3.3V (used for other PWM signals).
Chapter 8 List of Replaceable Parts Title 8.1 Introduction................................................................................................. 8.2 How to Obtain Parts.................................................................................... 8.3 Final Assembly Parts .................................................................................. 8.4 Main PCA Unit Parts .................................................................................. 8.5 Main PCA Parts ............
List of Replaceable Parts 8.1 Introduction 8 8.1 Introduction This chapter contains an illustrated list of replaceable parts for the model 123 ScopeMeter test tool. Parts are listed by assembly; alphabetized by item number or reference designator. Each assembly is accompanied by an illustration showing the location of each part and its item number or reference designator.
123 Service Manual 8.3 Final Assembly Parts See Table 8-1 and Figure 8-1 for the Final Assembly parts. Table 8-1.
List of Replaceable Parts 8.3 Final Assembly Parts 8 ST8014.EPS Figure 8-1.
123 Service Manual 8.4 Main PCA Unit Parts See Table 8-2 and Figure 8-2 for the Main PCA Unit parts. Table 8-2. Main PCA Unit Item Description Ordering Code 1 screw M2.5x5 5322 502 21206 2 combiscrew M3x10 5322 502 21507 3 insulator for power input 5322 325 10163 5 main PCA shielding box 5322 466 10976 6 guide piece for optical gate LEDs 5322 256 10201 7 main PCA shielding plate 5322 466 10964 8 screw M2.
List of Replaceable Parts 8.5 Main PCA Parts 8 8.5 Main PCA Parts See Figure 9-6 and Figure 9-7 at the end of Chapter 9 for the Main PCA drawings. Table 8-3. Main PCA Reference Designator Description Ordering Code 1 Led Holder for H521 and H522 5322 255 41213 2 Screw for Input Banana Jack Assembly 5322 502 14362 3 ( X100 ) Input Banana Jack Assembly - without Input A,B and COM O-rings, see Figure 8-2. - including rersistors R1 and R2 5322 264 10311 B401 QUARTZ CRYSTAL 32.
123 Service Manual Reference Designator 8-8 Description Ordering Code C132 CER CHIP CAP 63V 0.25PF 4.7PF 5322 122 32287 C133 CER CHIP CAP 63V 5% 47PF 5322 122 32452 C134 CER CHIP CAP 63V 5% 470PF 5322 122 32268 C136 CER CHIP CAP 63V 10% 4.
List of Replaceable Parts 8.5 Main PCA Parts Reference Designator Description Ordering Code C212 CER CAP 1 500V 0.25PF 4.7PF 5322 122 33082 C213 CER CAP 1 500V 0.25PF 4.7PF 5322 122 33082 C214 CER CAP 1 500V 0.25PF 4.7PF 5322 122 33082 C216 CER CAP 1 500V 0.25PF 4.7PF 5322 122 33082 C217 CER CAP 1 500V 4822 122 31195 C218 CER CAP 1 500V 0.25PF 4.7PF 5322 122 33082 C219 CER CAP 1 500V 0.25PF 4.7PF 5322 122 33082 C221 CER CAP 1 500V 4822 122 31202 C222 CER CAP 1 500V 0.25PF 4.
123 Service Manual Reference Designator 8-10 Description Ordering Code C289 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C290 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C291 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C301 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C303 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C306 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C311 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C312 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C313 ALCAP SANYO 25V 20% 10UF 5322 124 11
List of Replaceable Parts 8.5 Main PCA Parts Reference Designator Description Ordering Code C396 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C397 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C398 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C399 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C400 CHIPCAP X7B 0805 10% 22NF 5322 122 32654 C401 CER CHIP CAP 63V 0.25PF 4.
123 Service Manual Reference Designator 8-12 Description Ordering Code C472 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C473 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C474 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C475 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C476 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C478 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C479 CER CHIP CAP 63V 5322 122 32658 C480 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C481 CER CHIP CAP 63V 5% 22PF 5322 122 32658 C482
List of Replaceable Parts 8.
123 Service Manual Reference Designator Description 2KV +-5% 33PF Ordering Code C609 CER.CAP. 5322 126 14047 C610 CER CAP X5R 1206 10% 1UF 5322 126 14089 D401 * LOW VOLT ADC TDA8792M/C2/R1 5322 209 14837 D451 * LOW VOLT ADC TDA8792M/C2/R1 5322 209 14837 D471 * D-ASIC MOT0002 5322 209 13139 D474 * 8M FEPROM 5322 209 15199 AM29LV800B-120EC, or HN29WT800T , or M5M29FB800VP-120, or equivalent.
List of Replaceable Parts 8.5 Main PCA Parts Reference Designator Description Ordering Code L564 FIXED INDUCOR 68UH 10% TDK 5322 157 10995 L566 FIXED INDUCOR 68UH 10% TDK 5322 157 10995 L567 CHIP INDUCT.
123 Service Manual Reference Designator 8-16 Description Ordering Code R119 RESISTOR CHIP RC12H 1% 464E 5322 117 12455 R120 RESISTOR CHIP RC11 2% 10M 4822 051 20106 R121 RESISTOR CHIP RC12H 1% 68E1 5322 117 12454 R125 RESISTOR CHIP RC12H 1% 68E1 5322 117 12454 R131 RESISTOR CHIP RC12G 1% 5322 117 12484 R132 RESISTOR CHIP RC12G 1% 100K 5322 117 12485 R133 RESISTOR CHIP RC12G 1% 10K 5322 117 12486 R134 RESISTOR CHIP RC12G 1% 5322 117 12487 R136 RESISTOR CHIP RC-02G 1% 100E 4822
List of Replaceable Parts 8.
123 Service Manual Reference Designator 8-18 Description Ordering Code R241 RESISTOR CHIP RC12G 1% 215K 5322 117 12488 R242 RESISTOR CHIP RC12G 1% 147K 5322 117 12489 R243 RESISTOR CHIP RC12G 1% 909K 5322 117 12491 R246 RESISTOR CHIP RC12H 1% 215K 5322 117 12457 R251 RESISTOR CHIP RC12H 1% 100K 5322 117 12485 R252 RESISTOR CHIP RC12H 1% 100K 5322 117 12485 R253 RESISTOR CHIP RC12H 1% 681K 5322 117 12458 R254 RESISTOR CHIP RC12H 1% 681K 5322 117 12458 R255 RESISTOR CHIP RC12H 1%
List of Replaceable Parts 8.
123 Service Manual Reference Designator 8-20 Description Ordering Code Remarks R406 RESISTOR CHIP RC12H 1% 511E 5322 117 12451 R407 RESISTOR CHIP RC12H 1% 3K16 5322 117 12465 R408 RESISTOR CHIP RC11 2% 10M 4822 051 20106 R409 RESISTOR CHIP RC12H 1% 26K1 5322 117 12448 R410 RESISTOR CHIP RC12H 1% 68E1 5322 117 12454 R416 RESISTOR CHIP RC12H 1% 1E 5322 117 12472 R417 RESISTOR CHIP RC12H 1% 1E 5322 117 12472 R431 RESISTOR CHIP RC12H 1% 21K5 5322 117 12477 R432 RESISTOR CHIP RC1
List of Replaceable Parts 8.
123 Service Manual Reference Designator 8-22 Description Ordering Code Remarks R558 RESISTOR CHIP RC12H 1% 31K6 5322 117 12466 R559 RESISTOR CHIP RC12H 1% 5K11 5322 117 12469 R561 RESISTOR CHIP RC12H 1% 100E 4822 117 11373 R562 RESISTOR CHIP RC12H 1% 100E 4822 117 11373 R563 RESISTOR CHIP RC12H 1% 100K 4822 117 10837 R564 RESISTOR CHIP RC12H 1% 100K 4822 117 10837 R565 RESISTOR CHIP RC12H 1% 100K 4822 117 10837 R570 RESISTOR CHIP RC12H 1% 100K 4822 117 10837 R580 RESISTOR CHIP
List of Replaceable Parts 8.5 Main PCA Parts Reference Designator Description BSN20 Ordering Code V401 * N-CHAN FET PEL V402 * P-CHAN. MOSFET BSS84 V403 * N-CHAN FET V471 * SCHOTTKY DIODE BAS85 V482 * SCHOTTKY DIODE BAT54S V495 * P-CHAN.
123 Service Manual Reference Designator Description X601 MALE HEADER 7-P SNG RT.ANG Z501 EMI-FILTER 50V 10A MUR Ordering Code Remarks 5322 267 10502 5322 156 11139 8.6 Accessory Replacement Parts Black ground lead for STL120 5322 320 11354 8.7 Service Tools Power Adapter Cable for calibration (see Section 5.7).
Chapter 9 Circuit Diagrams Title Page 9.1 Introduction................................................................................................. 9-3 9.2 Schematic Diagrams....................................................................................
Circuit Diagrams 9.1 Introduction 9 9.1 Introduction This chapter contains all circuit diagrams and PCA drawings of the test tool. There are no serviceable parts on the LCD unit. Therefore no circuit diagrams and drawings of the LCD unit are provided. Referring signals from one place to another in the circuit diagrams is done in the following way: 1 2 3 4 5 A B 1 2 3 4 5 A SIGNAL B [5, C2] C C [1,B3] Figure 9.1 Circuit Diagram 1 SIGNAL Figure 9.
123 Service Manual 9.2 Schematic Diagrams The tables below show where to find the parts on the Main PCA circuit diagrams and assembly drawings. Separate tables are created for the Main PCA side 1 and side 2 assembly drawing. B402 C4 indicates that part B402 can be found in: 4, J10 location C4 on the Main PCA side 1 drawing circuit diagram part 4, location J10. Table 9-1.
Circuit Diagrams 9.2 Schematic Diagrams 9 Table 9-2.
123 Service Manual R214 R216 R217 R218 R219 R220 R221 R225 R231 R232 R233 R234 R236 R237 R238 R239 R240 R241 R242 R243 R246 R251 R252 R253 R254 R255 R256 R257 R258 R259 R260 R261 R271 R282 R284 R286 R288 R289 R301 R302 R303 R305 R307 R308 R309 R310 R311 9-6 A2 A2 A2 A2 A3 A2 A2 A2 B2 B2 B2 B2 B2 A1 A1 A1 A1 A2 B2 B2 B2 B2 B2 B2 B2 B2 A3 A3 B3 B3 A2 A3 B3 A3 A2 B3 A3 B2 C3 C3 C3 C3 D4 D3 C3 C3 C3 2, A5 2, C3 2, B3 2, D3 2, C4 2, B4 2, D4 2, C4 2, C5 2, D5 2, D5 2, D5 2, E5 2, E3 2, E3 2, E3 2, E4 2, E3 2
Circuit Diagrams 9.
123 Service Manual 1 2 3 4 5 6 7 8 9 N201 10 A R210 2K15 C211 4p7 R211 10M R214 10M GNDATT 13 C205 10u C214 4p7 R208 511E B R213 10M C212 4p7 R205 511E C213 4p7 R212 10M R217 215E VATTP3V3 DCBIAS VATTN3V3 VAMPPSUP 14 12 SWHF0 GNDHF0 16 HF1 C219 4p7 C218 4p7 R225 68E1 19 32 SWHF1 GNDHF1 GNDDIG 21 INPUT C233 47p CHANNEL B C207 470p PROBE_B AC/DC [4,H7] C248 10n R201 487K 5 6 INPUT B (grey input) ptc R206 500E C202 100n C206 4n7 R239 56K2 R242 147K COMMO
9 Circuit Diagrams 9.
123 Service Manual 8 9 10 11 VDDO [A5] [I5] X453 VRB 7 IREF C403 100n D401 TDA 8792 VSSA2 VSSA1 STBY NC CLK OEN 24 13 VSSD VSSO SMPCLK 1 11 3 23 SMPCLK TP432 PWM FILTERS TRIGLEV1 TRIGLEV2 OFFSET_A POS_A E SADCLEV CHARCUR C431 100n C439 4n7 C433 22n C432 100n C434 22n C438 4n7 [5,C16] R405 1K TRGLEV2D BSS84 V402 V403 BSN20 R407 3K16 HO_OUT OFFSETAD POS_A_D RAMPCLK OPTION CHARCURD SMPCLK HO_IN C442 22n R479 51K1 TP483 C441 22n R478 10K R436 26K1 [I8] HO_RND
Circuit Diagrams 9.2 Schematic Diagrams 9 4 ST8108.WMF Figure 9-5.
123 Service Manual 1 2 3 5 4 7 6 8 9 11 10 12 13 14 15 16 LINEAR SUPPLY A FLYBACK CONVERTER V569 BC869 R580 VBAT 0.
Circuit Diagrams 9.
123 Service Manual R563 C548 R565 C506 V565 R564 C551 C550 R553 R570 V567 R491 C478 V562 V554 V555 R552 R554 R559 C482 R550 R512 C529 C481 C483 V561 R375 V564 V563 L563 V604 V482 L567 L562 R481 R483 R385 R504 V602 C610 R466 R506 R602 R603 R507 R600 C607 C312 C547 R528 R472 R471 C488 R480 C342 N600 R405 C409 R406 C512 C512 C475 R495 L481 C378 R342 C301 C479 C381 R151 R152 R154 R153 R155 V359 R352 R353 V358 R139 R132 R354 R496 C132 R35
9 V302 Circuit Diagrams 9.2 Schematic Diagrams D480 C611 1 R486 R487 4022 245 0443.8 ST8135-2/00-01-12 ST8135-2.WMF Figure 9-9.
123 C489 R532 C532 R499 Service Manual R483 R482 R605 R606 V471 C476 C470 ST8136-2/00-01-12 ST8136-2.WMF Figure 9-10.
Chapter 10 Modifications Title Page 10.1 Software modifications ............................................................................. 10-1 10.2 Hardware modifications............................................................................
Modifications 10.1 Software modifications 10 10.1 Software modifications Changes and improvements made to the test tool software (firmware) are identified by incrementing the software version number. These changes are documented on a supplemental change/errata sheet which, when applicable, is included with the manual. To display the software version, proceed as follows: 1. Press to open the USER OPTIONS menu. 2. Press to show the VERSION&CALIBRATION screen (see Figure 5.1 in Section 5). 3.
123 Service Manual Revision 12 Changes: New software version V01.02. No hardware changes. Revision 13 Changes: For the 8M FlashROM D474 one of the following types can be used: • AM29LV800B-120EC • E28F800CV-B70 • HNWT800T • M5M29FB800VP-120 The part number of D474 has not been changed. Revision 14 A new version of the Printed Circuit Board (PCB) is used in the Main PCA. The version of the PCB is the last digit of the 12 digit number on the PCB edge near N501.
Modifications 10 replaces V301. • A filter circuit has been added in the Slow ADC supply (N532 pin 2, R532-C532), see the Power Circuit diagram figure 9-6 • A PCA version detection circuit has been added, see the Digital Circuit diagram figure 9-4. • A filter circuit for VGARVAL has been added, see the Digital Circuit diagram figure 9-4. The new parts numbers are listed in Table 8-3.
