Fluke ScopeMeter 123 Service Manual
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Fluke ScopeMeter 123 Service Manual

Industrial scopemeter
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123
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.

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  • Page 1  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.
  • Page 2 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. and Canada +31-402-678-200 in Europe +1-425-356-5500 from other countries...

  • Page 3: Table Of Contents

    Table of Contents Chapter Title Page Safety Instructions ................1-1 1.1 Introduction....................1-3 1.2 Safety Precautions..................1-3 1.3 Caution and Warning Statements..............1-3 1.4 Symbols....................... 1-3 1.5 Impaired Safety ................... 1-4 1.6 General Safety Information................. 1-4 Characteristics ................... 2-1 2.1 Introduction....................2-3 2.2 Dual Input Oscilloscope................
  • Page 4 Manual Service 3.3 Detailed Circuit Descriptions..............3-9 3.3.1 Power Circuit ..................3-9 3.3.2 Channel A - Channel B Measurement Circuits ........3-15 3.3.3 Trigger Circuit ..................3-20 3.3.4 Digital Circuit ..................3-25 Performance Verification ..............4-1 4.1 Introduction....................4-3 4.2 Equipment Required For Verification ............4-3 4.3 How To Verify ....................
  • Page 5 Contents (continued) Disassembling the Test Tool ............. 6-1 6.1. Introduction....................6-3 6.2. Disassembling Procedures ................. 6-3 6.1.1 Required Tools ..................6-3 6.2.2 Removing the Battery Pack ..............6-3 6.2.3 Removing the Bail ................6-3 6.2.4 Opening the Test Tool ................. 6-3 6.2.5 Removing the Main PCA Unit.............
  • Page 6 Manual Service Modifications ..................10-1 10.1 Software modifications ................10-1 10.2 Hardware modifications................10-1...
  • Page 7 No Visible Trace Disturbance ................2-12 2-2. Trace Disturbance < 10%..................2-12 2-3. Multimeter Disturbance < 1% ................2-12 3-1. Fluke 123 Main Blocks ..................3-3 3-2. Fluke 123 Operating Modes .................. 3-9 3-3. Voltage Ranges And Trace Sensitivity ..............3-18 3-4.
  • Page 9 List of Figures Figure Title Page 3-1. Fluke 123 Block Diagram..................3-2 3-2. Fluke 123 Start-up Sequence, Operating Modes........... 3-8 3-3. Power Supply Block Diagram ................3-9 3-4. CHAGATE Control Voltage ................. 3-12 3-5. Fly-Back Converter Current and Control Voltage ..........3-12 3-6.
  • Page 10 Four-wire Ohms calibration connections .............. 5-14 5-9. Capacitance Gain Calibration Input Connections ..........5-15 5-10. 20 V Supply Cable for Calibration................ 5-16 6-1. Fluke 123 Main Assembly..................6-4 6-2. Flex Cable Connectors ..................6-5 6-3. Main PCA Unit Assembly..................6-7 6-4.
  • Page 11 Chapter 1 Safety Instructions Title Page 1.1 Introduction....................1-3 1.2 Safety Precautions..................1-3 1.3 Caution and Warning Statements..............1-3 1.4 Symbols....................... 1-3 1.5 Impaired Safety ................... 1-4 1.6 General Safety Information................. 1-4...

  • Page 13: Safety Instructions

    Safety Instructions 1.1 Introduction 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.

  • Page 14: Impaired Safety

    Components which are important for the safety of the instrument may only be replaced by components obtained through your local FLUKE organization. These parts are indicated with an asterisk (*) in the List of Replaceable Parts, Chapter 8.

  • Page 15: Characteristics

    Chapter 2 Characteristics Title Page 2.1 Introduction....................2-3 2.2 Dual Input Oscilloscope................2-3 2.2.1 Vertical ....................2-3 2.2.2 Horizontal .................... 2-4 2.2.3 Trigger ....................2-4 2.2.4 Advanced Scope Functions..............2-5 2.3 Dual Input Meter ..................2-5 2.3.1 Input A and Input B ................2-5 2.3.2 Input A ....................

  • Page 17: Introduction

    2.1 Introduction 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.

  • Page 18: Horizontal

    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 ±(1% + 0.05 range/div) Vertical Accuracy ±4 divisions...

  • Page 19: Advanced Scope Functions

    Characteristics 2.3 Dual Input Meter Sensitivity A and B @ DC to 5 MHz 0.5 divisions or 5 mV @ 25 MHz 1.5 divisions @ 40 MHz 4 divisions ±0.5 div. max. Voltage level error Slope Positive, Negative Video on A Interlaced video signals only Modes Lines, Line Select...
  • Page 20 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: ±(1% +10 counts) DC to 60 Hz (VAC+DC) ±(1% +10 counts) 1 Hz to 60 Hz (VAC) AC or DC coupled: ±(2.5% +15 counts) 60 Hz to 20 kHz...
  • Page 21 Characteristics 2.3 Dual Input Meter Duty Cycle (DUTY) Range 2% to 98% Frequency Range for Continuous Autoset 15Hz (1Hz) to 30 MHz Accuracy: ±(0.5% +2 counts) @1Hz to 1 MHz ±(1.0% +2 counts) @1 MHz to 10 MHz ±(2.5% +2 counts) @10 MHz to 40 MHz Resolution 0.1%...

  • Page 22: Input A

    Service Manual 2.3.2 Input A Ohm (Ω Ω Ω Ω ) Ranges 500Ω, 5 kΩ, 50 kΩ, 500 kΩ, 5 MΩ, 30 MΩ ±(0.6% +5 counts) Accuracy Full Scale Reading 500Ω to 5 MΩ 5000 counts 30 MΩ 3000 counts Measurement Current 0.5 mA to 50 nA decreases with increasing ranges...

  • Page 23: Miscellaneous

    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...

  • Page 24: Environmental

    Service Manual Interface RS-232, optically isolated  To Printer 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). To PC Dump and load settings and data.

  • Page 25: Service And Maintenance

    Characteristics 2.6 Service and Maintenance 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) •...

  • Page 26: Emc Immunity

    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.

  • Page 27: Circuit Descriptions

    Chapter 3 Circuit Descriptions Title Page 3.1 Introduction....................3-3 3.2 Block Diagram .................... 3-3 3.2.1 Channel A, Channel B Measurement Circuits........3-4 3.2.2 Trigger Circuit ..................3-4 3.2.3 Digital Circuit ..................3-5 3.2.4 Power Circuit ..................3-6 3.2.5 Start-up Sequence, Operating Modes ..........3-7 3.3 Detailed Circuit Descriptions..............
  • Page 28 Service Manual ST7965.EPS Figure 3-1. Fluke 123 Block Diagram...

  • Page 29: Introduction

    Circuit (ASIC). A detailed circuit diagram of each block is shown in Section 9. See Table 3-1. for an overview of the blocks in which the test tool is broken down, the main block function, the ASIC name, and the applicable circuit diagram. Table 3-1. Fluke 123 Main Blocks Block Main Functions...

  • Page 30: Channel A, Channel B Measurement Circuits

    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.

  • Page 31: Digital Circuit

    Circuit Descriptions 3.2 Block Diagram 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.

  • Page 32: Power Circuit

    Via the PROBE-A and PROBE-B lines, connected to the Input A and Input B banana shielding, the D-ASIC can detect if a probe is connected. This function is not supported by the Fluke 123 software. The D-ASIC sends commands to the C-ASICs and T-ASIC via the SCLK and SDAT serial control lines, e.g.

  • Page 33: Start-Up Sequence, Operating Modes

    Circuit Descriptions 3.2 Block Diagram 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.
  • Page 34 TURN OFF Operational Operational & Charge Mode Mode Charge Mode MAINVAL=L TURN ON BATTVOLT < 4V MAINVAL=L Battery refresh AutoShutDown TURN OFF Figure 3-2. Fluke 123 Start-up Sequence, Operating Modes Table 3-2 shows an overview of the test tool operating modes.

  • Page 35: Detailed Circuit Descriptions

    Circuit Descriptions 3.3 Detailed Circuit Descriptions 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 P-ASIC & D-ASIC powered installed, test tool off (VBAT &...
  • Page 36 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).
  • Page 37 Circuit Descriptions 3.3 Detailed Circuit Descriptions 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.
  • Page 38 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”...
  • Page 39 Circuit Descriptions 3.3 Detailed Circuit Descriptions 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).
  • Page 40 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 D- ASIC knows voltage level of the selected input.

  • Page 41: Channel A - Channel B Measurement Circuits

    Circuit Descriptions 3.3 Detailed Circuit Descriptions 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 zero detect 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.
  • Page 42 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.
  • Page 43 Circuit Descriptions 3.3 Detailed Circuit Descriptions 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.

  • Page 44: Voltage Ranges And Trace Sensitivity

    Service Manual Table 3-3. Voltage Ranges And Trace Sensitivity range 50 mV 50 mV 50 mV 500 mV 500 mV 500 mV trace ../div 5 mV 10 mV 20 mV 50 mV 100 mV 200 mV 500 mV range 500V 500V 500V 1250V...
  • Page 45 Circuit Descriptions 3.3 Detailed Circuit Descriptions 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.

  • Page 46: Trigger Circuit

    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...
  • Page 47 Circuit Descriptions 3.3 Detailed Circuit Descriptions Triggering Figure 3-10 shows the block diagram of the T-ASIC trigger section. TRIGGER ASIC OQ0257 trigger section TRIGLEV1 ALLTRIG TRIGLEV2 TRIGQUAL ALLTRIG TRIG A select synchronize analog TRIG B TRIGDT DUALTRIG logic delta-t trigger path HOLDOFF SMPCLK colour filter...
  • Page 48 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.
  • Page 49 Circuit Descriptions 3.3 Detailed Circuit Descriptions 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.
  • Page 50 Service Manual Reference Voltage Circuit This circuit derives several reference voltages from the 1.23V main reference source. REFPWM2 +3.3V P-ASIC OQ0256 R307 +1.23V REFP V301 1.23V REFP T-ASIC OQ0257 R309 GAINPWM R311 +3.3V R312 REFPWM1 GNDREF R308 GAINREFN R306 -1.23V REFN R310 GAINADCB...

  • Page 51: Digital Circuit

    D-ASIC via the SCLK and SDAT serial control lines.. 3.3.4 Digital Circuit See the Fluke 123 block diagram Figure 3-1, and circuit diagram Figure 9-4. The Digital part is built up around the D-ASIC MOT0002. It provides the following functions: •...
  • Page 52 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.
  • Page 53 Circuit Descriptions 3.3 Detailed Circuit Descriptions 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. •...
  • Page 54 Service Manual Do Di Do Di FRAME Common Driver Common Driver Common Driver LnCl LnCl LnCl Column X1..80 X81..160 X161..240 Driver Y1..80 LnCl Carry Column Driver LEFT Y81..160 LnCl FRONTVIEW Carry Column Driver LCDAT0-3 PIXEL (0,0) DATACLK0 Y161..240 LINECLK LnCl Figure 3-13.

  • Page 55: D-Asic Pwm Signals

    Circuit Descriptions 3.3 Detailed Circuit Descriptions 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).
  • Page 56 (pin 99) can suppress the probe detection. If this signal is low, The PROBE-A and PROBE-B lines are permanently low (via R471, R472), regardless of a probe is connected or not connected. This function is not supported by the Fluke 123 software. See also Section 3.3.2 “Probe detection”.

  • Page 57: Performance Verification

    Chapter 4 Performance Verification Title Page 4.1 Introduction....................4-3 4.2 Equipment Required For Verification ............4-3 4.3 How To Verify .................... 4-3 4.4 Display and Backlight Test ................. 4-4 4.5 Input A and Input B Tests ................4-5 4.5.1 Input A and B Base Line Jump Test ............ 4-6 4.5.2 Input A Trigger Sensitivity Test ............

  • Page 59: Introduction

    4.2 Equipment Required For Verification The primary source instrument used in the verification 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.

  • Page 60: Display And Backlight Test

    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. •...

  • Page 61: Input A And Input B Tests

    Performance Verification 4.5 Input A and Input B Tests 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.

  • Page 62: Input A And B Base Line Jump Test

    Service Manual ST7968.CGM Figure 4-2. Menu item selection If an item is selected, it is marked by I. Not selected items are marked by . If a selected item is highlighted, an then is pressed, the item remains selected. You can also navigate through the menu using .

  • Page 63: Input A Trigger Sensitivity Test

    Performance Verification 4.5 Input A and Input B Tests 5. Using set the time base to 10 ms/div. 6. Using toggle the sensitivity of Input A between 5 and 10 mV/div. After 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.

  • Page 64: Input A Frequency Response Upper Transition Point Test

    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.

  • Page 65: Input B Frequency Measurement Accuracy Test

    Performance Verification 4.5 Input A and Input B Tests 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...

  • Page 66: Input B Frequency Response Upper Transition Point Test

    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.

  • Page 67: Input A And B Trigger Level And Trigger Slope Test

    Performance Verification 4.5 Input A and Input B Tests • Press 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).
  • Page 68 Service Manual • Move the Input A and Input B ground level (indicated by zero icon ) to the center grid line. Proceed as follows: 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.
  • Page 69 Performance Verification 4.5 Input A and Input B Tests 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.

  • Page 70: Input A And B Dc Voltage Accuracy Test

    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.

  • Page 71: Input A And B Ac Voltage Accuracy Test

    Performance Verification 4.5 Input A and Input B Tests Table 4-2. Volts DC Measurement Verification Points Sensitivity Range 5500A output, Input A-B DC Reading (Oscilloscope) (Meter) V DC 5 mV/div 500 mV 15 mV 014.4 to 015.6 10 mV/div 500 mV 30 mV 029.3 to 030.7 20 mV/div...

  • Page 72: Input A And B Ac Input Coupling Test

    Service Manual 2. Select the following test tool setup: • Press to select auto ranging ( in top of display). AUTO Do not press anymore! • Press to open the INPUT A MEASUREMENTS menu, and choose: MEASURE on A: • Press to open the INPUT B MEASUREMENTS menu, and choose: INPUT B:...

  • Page 73: Input A And B Volts Peak Measurements Test

    Performance Verification 4.5 Input A and Input B Tests • Press 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:...

  • Page 74: Input A And B Phase Measurements Test

    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).

  • Page 75: Input A And B High Voltage Ac/Dc Accuracy Test

    Performance Verification 4.5 Input A and Input B Tests 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.

  • Page 76: Resistance Measurements Test

    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.

  • Page 77: Continuity Function Test

    Performance Verification 4.5 Input A and Input B Tests 2. Select the following test tool setup: • Press to select auto ranging ( in top of display). AUTO • Press to open the INPUT A MEASUREMENTS menu, and choose: OHM Ω Ω Ω Ω MEASURE on A: 3.

  • Page 78: Diode Test Function Test

    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.

  • Page 79: Video Trigger Test

    Performance Verification 4.5 Input A and Input B Tests 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 00.00 to 00.10 (remove test tool input connections )
  • Page 80 Service Manual • Using set the Input A sensitivity to 200 mV/div. • select 20 µs/div. Using • Press to enable the arrow keys for selecting the video line number. • Using select the line number: 622 for PAL or SECAM 525 for NTSC.
  • Page 81 310 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.
  • Page 82 Service Manual or I or I or I SYSTEM: NTSC SECAM PALplus | LINE: SELECT | • POLARITY: NEGATIVE • Using set the Input A sensitivity to 200 mV/div. • select 20 µs/div. Using 9. Using select the line number: 310 for PAL or SECAM 262 for NTSC 10.

  • Page 83: Calibration Adjustment

    Chapter 5 Calibration Adjustment Title Page 5.1 General ......................5-3 5.1.1 Introduction..................5-3 5.1.2 Calibration number and date..............5-3 5.1.3 General Instructions................5-3 5.2 Equipment Required For Calibration............5-4 5.3 Starting Calibration Adjustment ..............5-4 5.4 Contrast Calibration Adjustment ..............5-6 5.5 Warming Up &...

  • Page 85: 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.

  • Page 86: Equipment Required For Calibration

    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.
  • Page 87 Calibration Adjustment 5.3 Starting Calibration Adjustment 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.

  • Page 88: Contrast Calibration Adjustment

    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).

  • Page 89: Warming Up & Pre-Calibration

    Calibration Adjustment 5.5 Warming Up & Pre-Calibration 5.5 Warming Up & Pre-Calibration After entering the Warming-Up & Pre-Calibration state, the display shows: WarmingUp (CL 0200):IDLE (valid) (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.

  • Page 90: Hf Gain Calibration Points Fast

    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). 5. Press to start the calibration. 6.

  • Page 91: Delta T Gain, Trigger Delay Time & Pulse Adjust Input A

    Calibration Adjustment 5.6 Final Calibration Table 5-2. HF Gain Calibration Points Slow Cal step 5500A Setting Test Tool Input Signal (1 kHz, MODE Requirements <2 µs, wavegen, (1 kHz square, t rise WAVE square) flatness after rising edge: <0.5% after 4 µs) HF-Gain AB (CL 0609) For firmware V01.00 HF-Gain AB (CL 0610)

  • Page 92: Pulse Adjust Input A (Firmware V01.00 Only)

    Service Manual 4. Set the 5500A to operate (OPR). 5. Press to start the calibration. 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...

  • Page 93: Pulse Adjust Input B

    Calibration Adjustment 5.6 Final Calibration 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.

  • Page 94: Volt Gain Calibration Points <300V

    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.

  • Page 95: Volt Zero

    Calibration Adjustment 5.6 Final Calibration 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). 13.

  • Page 96: Gain Ohm

    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.

  • Page 97: Capacitance Gain Low And High

    Calibration Adjustment 5.6 Final Calibration 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.

  • Page 98: Capacitance Gain

    Service Manual 5.6.11 Capacitance Gain Proceed as follows to do the Capacitance Gain calibration: 1. Press to select calibration adjustment step Cap. Gain (CL 0960):IDLE 2. Connect the test tool to the 5500A as shown in Figure 5-9 (Section 5.6.9). 3.
  • Page 99 Calibration Adjustment 5.7 Save Calibration Data and Exit 4. Press (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.

  • Page 100: Disassembling The Test Tool

    Chapter 6 Disassembling the Test Tool Title Page 6.1. Introduction....................6-3 6.2. Disassembling Procedures ................. 6-3 6.1.1 Required Tools ..................6-3 6.2.2 Removing the Battery Pack ..............6-3 6.2.3 Removing the Bail ................6-3 6.2.4 Opening the Test Tool ................. 6-3 6.2.5 Removing the Main PCA Unit.............

  • Page 102: Introduction

    Disassembling the Test Tool 6.1. Introduction 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.
  • Page 103 Service Manual ST8014.EPS Figure 6-1. Fluke 123 Main Assembly...

  • Page 104: Removing The Main Pca Unit

    Disassembling the Test Tool 6.2. Disassembling Procedures 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.

  • Page 105: Removing The Display Assembly

    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.
  • Page 106 Disassembling the Test Tool 6.3 Disassembling the Main PCA Unit 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).

  • Page 107: Reassembling The Main Pca Unit

    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).
  • Page 108 Disassembling the Test Tool 6.5 Reassembling the Test Tool 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.

  • Page 109: Corrective Maintenance

    Chapter 7 Corrective Maintenance Title Page 7.1 Introduction ....................... 7-3 7.2 Starting Fault Finding..................7-4 7.3 Charger Circuit ....................7-4 7.4 Starting with a Dead Test Tool................7-6 7.4.1 Test Tool Completely Dead ............... 7-6 7.4.2 Test Tool Software Does not Run.............. 7-7 7.4.3 Software Runs, Test Tool not Operative............

  • Page 111: Introduction

    Corrective Maintenance 7.1 Introduction 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.

  • Page 112: Starting Fault Finding

    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).
  • Page 113 Corrective Maintenance 7.3 Charger Circuit 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.

  • Page 114: Starting With A Dead Test Tool

    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.

  • Page 115: Test Tool Software Does Not Run

    Corrective Maintenance 7.4 Starting with a Dead Test Tool 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.

  • Page 116: Miscellaneous Functions

    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.

  • Page 117: Fly Back Converter

    Corrective Maintenance 7.5 Miscellaneous Functions 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.

  • Page 118: Slow Adc

    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.

  • Page 119: Keyboard

    Corrective Maintenance 7.5 Miscellaneous Functions 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 : +3.3V Press key...
  • Page 120 Service Manual 2. Press to open the menu. SCOPE INPUTS Press to open the menu, and select: SCOPE OPTIONS ... 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.

  • Page 121: Channel A Ohms And Capacitance Measurements

    Corrective Maintenance 7.5 Miscellaneous Functions 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.

  • Page 122: Trigger Functions

    Service Manual 2. Press and select CAP . MEASURE on A: Verify TP156 for +3.3 ... 0V pulses (repetition rate 100...200 ms): pulse width approximately 30 µs. Zero scale (open input): Full scale (for example 500 nF): pulse width approximately 25 ms. If not correct, most probably the C-ASIC N101 is defective.

  • Page 123: Reference Voltages

    Corrective Maintenance 7.5 Miscellaneous Functions 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.

  • Page 124: Ram Test

    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.

  • Page 125: Pwm Circuit

    2. Check TP482, for +3...0V pulses, variable frequency and duty cycle. 7.6 Loading Software To load instrument software in the test tool, the Fluke-43-123-19x ScopeMeter Loader program is required. Power the test tool via the power adapter input using the BC190 Power Adapter.

  • Page 126: List Of Replaceable Parts

    Chapter 8 List of Replaceable Parts Title Page 8.1 Introduction....................8-3 8.2 How to Obtain Parts..................8-3 8.3 Final Assembly Parts .................. 8-4 8.4 Main PCA Unit Parts .................. 8-6 8.5 Main PCA Parts ..................8-7 8.6 Accessory Replacement Parts ..............8-24 8.7 Service Tools....................

  • Page 128: Introduction

    To ensure prompt delivery of the correct part, include the following information when you place an order: • Instrument model (Fluke 123), 12 digit instrument code (9444 ..), and serial number (DM..). The items are printed on the type plate on the bottom cover. •...

  • Page 129: Final Assembly Parts

    8.3 Final Assembly Parts See Table 8-1 and Figure 8-1 for the Final Assembly parts. Table 8-1. Final Assembly Parts Item Description Ordering Code top case assembly Fluke 123 5322 442 00272 shielding foil 5322 466 11434 dust seal 5322 466 11435...
  • Page 130 List of Replaceable Parts 8.3 Final Assembly Parts ST8014.EPS Figure 8-1. Fluke 123 Final Assembly...

  • Page 131: Main Pca Unit Parts

    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 screw M2.5x5 5322 502 21206 combiscrew M3x10 5322 502 21507 insulator for power input 5322 325 10163 main PCA shielding box 5322 466 10976...

  • Page 132: Main Pca Parts

    List of Replaceable Parts 8.5 Main PCA Parts 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 Description Ordering Remarks Designator Code Led Holder for H521 and H522 5322 255 41213 Screw for Input Banana Jack Assembly 5322 502 14362...
  • Page 133 Service Manual Reference Description Ordering Remarks Designator 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% 4.7NF 5322 126 10223 C142...
  • Page 134 List of Replaceable Parts 8.5 Main PCA Parts Reference Description Ordering Remarks Designator 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...
  • Page 135 Service Manual Reference Description Ordering Remarks Designator 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...
  • Page 136 List of Replaceable Parts 8.5 Main PCA Parts Reference Description Ordering Remarks Designator 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...
  • Page 137 Service Manual Reference Description Ordering Remarks Designator 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...
  • Page 138 List of Replaceable Parts 8.5 Main PCA Parts Reference Description Ordering Remarks Designator Code C547 CHIPCAP X7B 0805 10% 22NF 5322 122 32654 C548 CHIPCAP X7B 0805 10% 22NF 5322 122 32654 C549 CHIPCAP X7B 0805 10% 22NF 5322 122 32654 C550 CER CHIP CAP 63V 10% 4.7NF...
  • Page 139 Service Manual Reference Description Ordering Remarks Designator Code C609 CER.CAP. 2KV +-5% 33PF 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...
  • Page 140 List of Replaceable Parts 8.5 Main PCA Parts Reference Description Ordering Remarks Designator Code L564 FIXED INDUCOR 68UH 10% TDK 5322 157 10995 L566 FIXED INDUCOR 68UH 10% TDK 5322 157 10995 L567 CHIP INDUCT. 47UH 10% TDK 4822 157 70794 L569 FIXED INDUCOR 68UH 10% TDK 5322 157 10995...
  • Page 141 Service Manual Reference Description Ordering Remarks Designator 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%...
  • Page 142 List of Replaceable Parts 8.5 Main PCA Parts Reference Description Ordering Remarks Designator Code R184 RESISTOR CHIP RC12H 1% 10E 5322 117 12464 R186 RESISTOR CHIP RC12H 1% 10E 5322 117 12464 R188 RESISTOR CHIP RC12H 1% 10E 5322 117 12464 R189 RESISTOR CHIP RC12H 1% 10E 5322 117 12464...
  • Page 143 Service Manual Reference Description Ordering Remarks Designator 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...
  • Page 144 List of Replaceable Parts 8.5 Main PCA Parts Reference Description Ordering Remarks Designator Code R322 RESISTOR CHIP RC12H 1% 681K 5322 117 12458 R323 RESISTOR CHIP RC12H 1% 34K8 5322 117 12467 R324 RESISTOR CHIP RC12H 1% 215K 5322 117 12457 R326 RESISTOR CHIP RC12H 1% 562K 5322 117 12468...
  • Page 145 Service Manual Reference Description Ordering Remarks Designator Code 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...
  • Page 146 List of Replaceable Parts 8.5 Main PCA Parts Reference Description Ordering Remarks Designator Code R486 SMD RES 10K 1% TC50 0805 4022 301 22071 R487 SMD RES 10K 1% TC50 0805 4022 301 22071 R491 RESISTOR CHIP RC12H 1% 51K1 5322 117 12462 R495 RESISTOR CHIP RC12H 1% 3K16...
  • Page 147 Service Manual Reference Description Ordering Remarks Designator Code 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...
  • Page 148 List of Replaceable Parts 8.5 Main PCA Parts Reference Description Ordering Remarks Designator Code V401 * N-CHAN FET BSN20 5322 130 63289 V402 * P-CHAN. MOSFET BSS84 5322 130 10669 V403 * N-CHAN FET BSN20 5322 130 63289 V471 * SCHOTTKY DIODE BAS85 9338 765 40115 V482 *...

  • Page 149: Accessory Replacement Parts

    Service Manual Reference Description Ordering Remarks Designator Code X601 MALE HEADER 7-P SNG RT.ANG 5322 267 10502 Z501 EMI-FILTER 50V 10A 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 5322 320 11707 (see Section 5.7).

  • Page 150: Circuit Diagrams

    Chapter 9 Circuit Diagrams Title Page 9.1 Introduction....................9-3 9.2 Schematic Diagrams..................9-4...

  • Page 152: Introduction

    Circuit Diagrams 9.1 Introduction 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: SIGNAL...

  • Page 153: Schematic Diagrams

    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 4, J10 indicates that part B402 can be found in: location C4 on the Main PCA side 1 drawing circuit diagram part 4, location J10.

  • Page 154: Parts Location Main Pca Side 2

    Circuit Diagrams 9.2 Schematic Diagrams Table 9-2. Parts Location Main PCA Side 2 B401 B4 4, J9 C331 C3 3, E11 C481 B4 4, J11 N531 B4 5, J6 C332 C4 3, E10 C482 B4 4, J11 N600 D5 5, J11 C107 D2 1, D5 C342...
  • Page 155 Service Manual R214 A2 2, A5 R326 B3 3, C6 R473 B3 4, I8 R591 C4 5, K4 R216 A2 2, C3 R331 C3 3, C7 R474 B4 4, I8 R600 C5 5, K15 R217 A2 2, B3 R337 C3 3, F11 R478 C4 4, F5 R602...
  • Page 156 Circuit Diagrams 9.2 Schematic Diagrams N101 L181 R182 GENOUT +3V3A [3,A1] DCBIAS VATTP3V3 [5,C16] C182 C181 R110 R111 R112 R113 R114 100n GNDATT 2K15 L182 C111 C112 R184 -3V3A VATTN3V3 [5,C16] R105 511E C184 R186 C105 100n VAMPPSUP R120 C186 L183 100n +5VA...
  • Page 157 Service Manual N201 L281 R282 +3V3A DCBIAS VATTP3V3 [5,C16] C282 C281 R210 R211 R212 R213 R214 100n GNDATT 2K15 L282 C212 C211 R284 -3V3A VATTN3V3 [5,C16] R205 511E C284 R286 C205 100n VAMPPSUP R220 C286 L283 GNDREF 34 100n +5VA SWHF0 [5,B16] C213...
  • Page 158 Circuit Diagrams 9.2 Schematic Diagrams ICAL [1,F10] R354 R356 VCC5REF VCC3ATR GENOUT [1,A2] 261E 261E V356 BC858 C C356 C399 VDDAA [4,A11] 15 or18n FILM 100n R391 PROTECTION V358 V359 BC868 BC868 C357 TVSYNC SYNC. PULSE R390 R392 464K 4K22 SEPARATOR 5K11 V353...
  • Page 159 Service Manual R416 D474 VDDO +3V3D [5,B16] [A5] [I5] 28F400 TP488 AM29LV800B L481 ROM_A16 R404 X453 VDDDA ROM_A15 BYTE# ADC-CHANNEL-A [A5] [B11] ROM_A14 R454 LCDONOFF LCDONOFF VDDDB ROM_D15 ROM_A13 VDDDA MS422 DQ15/A_1 [A10] [I5] ROM_D07 ROM_A12 MS421 R403 DATACLK0 DATACLK0 ROM_D14 ROM_A11 VDDAA...
  • Page 160 Circuit Diagrams 9.2 Schematic Diagrams ST8108.WMF Figure 9-5. Circuit Diagram 4 (cont), Digital Circuit Keyboard 9-11...
  • Page 161 Service Manual LINEAR SUPPLY FLYBACK CONVERTER V569 BC869 R580 VBAT TP571 0.33E V567 L569 MBRS340 68uH +3V3GAR [4,B13] TP561 +3V3SADC C568 VGARVAL C565 C567 [4,J14] 150u 150u 150u R508 TP568 For PCB versions < 8 only TP572 L562 +12VPROG BATIDENT [4,D16] 47uH +5VA...
  • Page 162 Circuit Diagrams 9.2 Schematic Diagrams TP572 X453 X601 X452 L600 K173 TP603 TP495 TP496 C106 TP602 C574 H495 T600 TP601 C181 D474 TP258 C564 R306 C183 TP154 C608 TP604 TP437 TP153 TP600 C573 TP155 C187 L566 TP486 C576 TP573 TP310 TP605 C105 TP152...
  • Page 163 Service Manual V506 C507 C509 V566 C500 R580 R529 R509 R527 R535 R503 V569 L281 R524 V501 C505 C583 R558 C282 R282 R284 R241 C256 R502 C552 C284 R260 C242 R288 R256 V504 C288 V550 C291 R257 R261 R467 R551 C290 R258 C259...
  • Page 164 Circuit Diagrams 9.2 Schematic Diagrams D480 R486 R487 4022 245 0443.8 ST8135-2/00-01-12 ST8135-2.WMF Figure 9-9. Main PCA side 1, PCB version 8 9-15...
  • Page 165 Service Manual C532 C470 R483 V471 R482 ST8136-2/00-01-12 ST8136-2.WMF Figure 9-10. Main PCA side 2, PCB version 8 9-16...

  • Page 166: Modifications

    Chapter 10 Modifications Title Page 10.1 Software modifications ................10-1 10.2 Hardware modifications................10-1...
  • Page 168 Modifications 10.1 Software modifications 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.
  • Page 169 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.
  • Page 170 Modifications 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.

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