Fluke 43B Service Manual
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Fluke 43B Service Manual

Power quality analyzer
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43B
Power Quality Analyzer
Service Manual
4822 872 05385
December 2001
© 2001 Fluke Corporation, All rights reserved. Printed in the Netherlands
All product names are trademarks of their respective companies.

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Summary of Contents for Fluke 43B

  • Page 1 ® Power Quality Analyzer Service Manual 4822 872 05385 December 2001 © 2001 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 +1-425-446-5500 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 Safety Specifications...................
  • Page 4 Service Manual 3.3.4 Digital Circuit ..................3-24 Performance Verification ..............4-1 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 1 and Input 2 Tests in the SCOPE MODE........4-5 4.5.1 Input 1 Trigger Sensitivity Test............
  • Page 5 Contents (continued) 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............. 6-5 6.2.6 Removing the Display Assembly............
  • Page 7 2-3. Disturbance < 10 % ....................2-10 3-1. Fluke 43B Main Blocks..................3-3 3-2. Fluke 43B Operating Modes ................. 3-8 3-3. Input 1 Voltage Ranges And Trace Sensitivity ............. 3-17 3-4. Ohms Ranges, Trace Sensitivity, and Current ............3-18 3-5.
  • Page 9 Page 2-1. Max. Input Voltage vs. Frequency ................ 2-4 3-1. Fluke 43 Block Diagram..................3-2 3-2. Fluke 43 Start-up Sequence, Operating Modes............. 3-8 3-3. Power Supply Block Diagram ................3-9 3-4. CHAGATE Control Voltage ................. 3-11 3-5. Fly-Back Converter Current and Control Voltage ..........3-12 3-6.
  • Page 10 Mounting the display shielding bracket ..............6-9 6-5. Battery pack installation..................6-9 7-1. Operative Test Tool without Case................. 7-3 8-1. Fluke 43 Final Assembly..................8-5 8-2. Main PCA Unit...................... 8-6 9-1. Circuit Diagram 1, Channel 1 Circuit ..............9-7 9-2.
  • 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 Safety Specifications................... 2-3 2.3 Function Specifications................2-4 2.3.1 Electrical functions ................2-4 2.3.2 Scope....................2-5 2.3.3 Meter....................2-7 2.3.4 Record....................2-7 2.4 Miscellaneous ..................... 2-8 2.5 Current Probe ....................2-8 2.6 Environmental Conditions ................2-9 2.7 Electromagnetic Immunity................

  • Page 17: Introduction

    2.1 Introduction 2.1 Introduction Safety Characteristics The Fluke 43B has been designed and tested in accordance with Standards ANSI/ISA S82.01-1994, EN 61010.1 (1993) (IEC 1010-1), CAN/CSA-C22.2 No.1010.1-92 (including approval), UL3111-1 (including approval) Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use.

  • Page 18: Function Specifications

    Service Manual ST8571 Figure 2-1. Max. Input Voltage vs. Frequency Maximum floating voltage From any terminal to ground 0 to 400 Hz ....................600 Vrms 2.3 Function Specifications The accuracy of all measurements is within ± (% of reading + number of counts) from 18 °C to 28 °C.

  • Page 19: Scope

    Characteristics 2.3 Function Specifications PF......................0.00 to 1.00 ± 0.04 Frequency range ................. 10.0 Hz to 15.0 kHz 40.0 to 70.0 Hz ..............±(0.5 % + 2 counts) Harmonics Number of harmonics ..............DC..21, DC..33, DC..51 Readings / Cursor readings Vrms..fund. ±(3 % + 2 counts) ..31 ±(5 % + 3 counts)..
  • Page 20 Service Manual Maximum sampling rate 10 ms to 60 s....................5 MS/s 20 ns to 10 ms....................25 MS/s Trigger source (auto, ½ auto, manual)..........Input 1 or Input 2 Trigger Mode ......................auto triggering Sources........Input 1, Input 2, Automatic (not manually selectable) Error for frequencies <...

  • Page 21: Meter

    Characteristics 2.3 Function Specifications 1 Hz to 1 MHz ................±(0.5 % + 2 counts) 1 MHz to 10 MHz................±(1 % + 2 counts) 10 MHz to 30 MHz..............±(2.5 % + 2 counts) Phase (Input 1 to Input 2) Up to 60 Hz......................±2°...

  • Page 22: Miscellaneous

    Internal Rechargeable Ni-Cd battery pack..............BP120 Voltage range.....................4 to 6 V dc Operating Time....................4 hours Charging Time..............4 hours with Fluke 43B off 12 hours with Fluke 43B on Refresh cycle ..................8 to 14 hours Memory Number of screen memories ..................20 Number of transient memories (temporary) ..............

  • Page 23: Environmental Conditions

    Characteristics 2.6 Environmental Conditions Accuracy 5 to 10 Hz 1 to 500 A ....................-3 dB typically 10 to 20 Hz 1 to 300 A ......................± 5 % 300 to 400 A ....................± 15 % 400 to 500 A ....................± 25 % 20 to 45 Hz 1 to 500 A ......................±...

  • Page 24: Electromagnetic Immunity

    Service Manual 2.7 Electromagnetic Immunity The Fluke 43B, including standard accessories, conforms with the EEC directive 89/336 for EMC immunity, as defined by IEC1000-4-3, with the addition of the following tables. Disturbance with test leads TL24 or Current Clamp 80i-500s •...

  • Page 25: Circuit Descriptions

    Chapter 3 Circuit Descriptions Title Page 3.1 Introduction....................3-3 3.2 Block Diagram .................... 3-3 3.2.1 Input 1 - Input 2 Measurement Circuits..........3-3 3.2.2 Trigger Circuit ..................3-5 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 26 Service Manual ST7965.EPS Figure 3-1. Fluke 43B Block Diagram...

  • Page 27: Introduction

    (ASIC). A detailed circuit diagram of each block is shown in Section 9. Table 3-1 provides 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 43B Main Blocks Block Main Functions...
  • Page 28 Service Manual The Input 1 and Input 2 measurement circuits are partially identical. The differences are: • Only Input 1 provides facilities for Ohms, Continuity, Diode, and Capacitance measurements. • The bandwidth of the Input 1 circuit is 20 MHz, the bandwidth of Input 2 is 15 kHz. •...

  • Page 29: Trigger Circuit

    Circuit Descriptions 3.2 Block Diagram An offset compensation voltage and a trace position control voltage are provided by the D-ASIC via the APWM bus. The C-ASIC’s also provide conditioned input voltages on the TRIG-A/TRIG-B line. One of these voltages will automatically be selected as trigger source by the T-ASIC. 3.2.2 Trigger Circuit The T ASIC selects one of the possible trigger sources TRIG-A (Input 1) or TRIG-B (Input 2).

  • Page 30: Power Circuit

    Service Manual This prevents that at each next acquisition the trace is sampled at the same time positions, and that the displayed trace misses samples at some places on the LCD. The D-ASIC supplies control data and display data to the LCD module. The LCD module is connected to the main board via connector X453.

  • Page 31: Start-Up Sequence, Operating Modes

    Circuit Descriptions 3.2 Block Diagram 3.2.5 Start-up Sequence, Operating Modes The test tool sequences through the next steps when power is applied (see Figure 3-2): 1. The P-ASIC is directly powered by the battery or power adapter voltage VBAT. Initially the Fly Back Converter is off, and the D-ASIC is powered by VBAT via transistor V569 (+3V3GAR).
  • Page 32 TURN ON BATTVOLT < 4V MAINVAL=L Battery refresh AutoShutDown TURN OFF Figure 3-2. Fluke 43B Start-up Sequence, Operating Modes Table 3-2 shows an overview of the test tool operating modes. Table 3-2. Fluke 43B Operating Modes Mode Conditions Remark Idle mode...

  • Page 33: Detailed Circuit Descriptions

    Circuit Descriptions 3.3 Detailed Circuit Descriptions 3.3 Detailed Circuit Descriptions 3.3.1 Power Circuit The description below refers to circuit diagram Figure 9-5. Power Sources , Operating Modes Figure 3-3 shows a simplified diagram of the power supply and battery charger circuit. SUPPLY FLY BACK +3V3GAR...
  • Page 34 Service Manual keep running, and the test tool is not operative: the test tool is in the Mask active state. For test purposes the mask active mode can also be entered by pressing the ^ and > key when the test tool is turned on. If valid software is present, one of the three modes Operational, Operational &...
  • Page 35 Circuit Descriptions 3.3 Detailed Circuit Descriptions charge current is applied for 48 hours maximum. If the battery temperature becomes higher than 50°C, the charge current is set to zero. Battery temperature monitoring The P-ASIC supplies a current to a NTC resistor in the battery pack (TEMP pin 5). It conditions the voltage on pin 5 and supplies it to output pin 79 BATTEMP.
  • Page 36 Service Manual Fly Back Converter When the test tool is turned on, the D-ASIC makes the PWRONOFF line (P-ASIC pin 62) high. Then the self oscillating Fly Back Converter becomes active. It is started up by the internal 100 kHz oscillator that is also used for the Charger/Converter circuit. First the FLYGATE signal turns FET V554 on (see Figure 3-5), and an increasing current flows in the primary transformer winding to ground, via sense resistor R551.
  • Page 37 Circuit Descriptions 3.3 Detailed Circuit Descriptions VBAT +5VA V561 V553 +3V3A T552 V562 R561 FLYBOOST SNUB -3V3A C552 C551 V551 V563 -30VD V564 FLYGATE V554 BOOST R551 FREQPS FLYSENSP R570 R559 IMAXFLY VCOIL CONTROL -3V3A R558 R552 VOUTHI COSC R554 VSENS C553 PWRONOFF...
  • Page 38 Service Manual The D-ASIC controls the transmit data line TXD. If the line is low, diode H521 will emit light. The supply voltage for the optical interface receive circuit (RXDA), is the +3V3SADC voltage. The +3V3SADC voltage is present if the test tool is turned on, or if the Power Adapter is connected (or both).

  • Page 39: Input 1 - Input 2 Measurement Circuits

    Circuit Descriptions 3.3 Detailed Circuit Descriptions 3.3.2 Input 1 - Input 2 Measurement Circuits The description below refers to circuit diagrams Figure 9-1 and Figure 9-2. The Input 1 and Input 2 circuits are partly identical. Both circuits condition input voltages.
  • Page 40 (mainly mains interference when the power adapter is connected). To eliminate this LF interference voltage, it is buffered (also via input GPROT, pin 2), and subtracted from the input signal. Pin 43B (PROTGND) is the ground reference of the input buffer. CALSIG input pin 36 The reference circuit on the TRIGGER part supplies an accurate +1.23 V DC voltage to...
  • Page 41 Circuit Descriptions 3.3 Detailed Circuit Descriptions DACTEST output pin 24 As described above, the DACTEST output is used for signaling a ground protect error. It can also be used for testing purposes. Furthermore the DACTEST output provides a C- ASIC reset output signal (+1.75V) after a power on. ADDRESS output pin 23 The output provides a replica of the input voltage to the SENSE line via R165.
  • Page 42 Service Manual measurement ground. Any voltage across the PTC resistor will be added to the input signal, and cause a mis-reading. This influences Input 2 in particular as this input operates mostly in the lowest voltage ranges (see section 3.2.1). For this reason a hum rejection circuit is added for Input 2.
  • Page 43 Circuit Descriptions 3.3 Detailed Circuit Descriptions +Iref I-Cx -Iref pos. clamp active ref clamp U-Cx neg. clamp active neg. clamp active TRIG-A Figure 3-9. Capacitance Measurement The T-ASIC supplies a positive (charge) and a negative (discharge) current. A measurement cycle starts from a discharged situation (U =0) with a charge current.

  • Page 44: Trigger Circuit

    Service Manual lead, or a BB120 shielded banana-to-BNC adapter, is inserted in Input 1 or Input 2, it will short the two ground shield halves This can be detected by the D-ASIC. Supply Voltages The +5VA, +3V3A, and -3V3A supply voltages are supplied by the Fly Back Converter on the POWER part.
  • Page 45 Circuit Descriptions 3.3 Detailed Circuit Descriptions 1. Single shot triggering. The DUALTRIG signal is supplied to the synchronization/delta-T circuit. The trigger levels TRIGLEV1 and TRIGLEV2 are set just above and below the DC level of the input signal. A trigger is generated when the signal crosses the trigger levels. A trigger will occur on both a positive or a negative glitch.
  • Page 46 Service Manual TRIGGER SAMPLES SWEEP 1 SAMPLES SWEEP 2 PIXEL 12 13 Figure 3-11. Random Repetitive Sampling Mode 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.
  • Page 47 Circuit Descriptions 3.3 Detailed Circuit Descriptions Reference Voltage Circuit This circuit derives several reference voltages from the 1.23 V 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...

  • Page 48: Digital Circuit

    D-ASIC via the SCLK and SDAT serial control lines.. 3.3.4 Digital Circuit See the Fluke 43B 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 49 Circuit Descriptions 3.3 Detailed Circuit Descriptions 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).
  • Page 50 Service Manual The circuit D480 and related parts create a delay for the ROMWRITE enable signal. This prevents the ROM write proces being disabled before all data have been written (PCB version 3 up only). Display Control The LCD unit includes the LCD, the LCD drivers, and the fluorescent back light lamp. It is connected to the main board via connector X453.
  • Page 51 Circuit Descriptions 3.3 Detailed Circuit Descriptions variations, a temperature dependent resistor is mounted in the LCD unit. It is connected to the LCDTEMP1 line. The resistance change, which represents the LCD temperature, is measured by the D-ASIC via the S-ADC on the POWER part. The back light lamp is located at the left side of the LCD, so this side becomes warmer than the right side.
  • Page 52 Service Manual The optical interface output is directly connected to the TXD line (pin 86). The optical input line is buffered by the P-ASIC on the power part. The buffered line is supplied to the RXD input (pin 87). The serial data communication (RS232) is controlled by the D-ASIC.

  • Page 53: 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 1 and Input 2 Tests in the SCOPE MODE......... 4-5 4.5.1 Input 1 Trigger Sensitivity Test ............

  • Page 55: 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 56: Display And Backlight Test

    Service Manual 4.4 Display and Backlight Test Before doing the tests, you must reset the test tool to put it in a defined state. Proceed as follows to reset the test tool: • Press to turn the test tool off. •...

  • Page 57: Input 1 And Input 2 Tests In The Scope Mode

    Performance Verification 4.5 Input 1 and Input 2 Tests in the SCOPE MODE. 11. Press The test pattern is removed; the test tool shows Contrast (CL 0110):MANUAL 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 58: Input 1 Trigger Sensitivity Test

    Service Manual 4.5.1 Input 1 Trigger Sensitivity Test Proceed as follows to test the Input 1 trigger sensitivity: 1. Connect the test tool to the 5500A as shown in Figure 4-2. ST8004.WMF Figure 4-2. Test Tool Input 1 to 5500A Scope Output 50Ω Ω Ω Ω 2.

  • Page 59: Input 1 Frequency Response Upper Transition Point Test

    Performance Verification 4.5 Input 1 and Input 2 Tests in the SCOPE MODE. 4.5.2 Input 1 Frequency Response Upper Transition Point Test Proceed as follows to test the Input 1 frequency response upper transition point: 1. Connect the test tool to the 5500A as for the previous test (see Figure 4-2). 2.
  • Page 60 Service Manual 3. Select the following test tool setup: • Press to select menu SCOPE SETUP. • Press to highlight Input 1 coupling. • Press to select the Input 1 coupling menu. • Press to highlight DC Coupling. • mark changes to I Press to confirm;...

  • Page 61: Input 2 Frequency Measurement Accuracy Test

    Performance Verification 4.5 Input 1 and Input 2 Tests in the SCOPE MODE. 4.5.4 Input 2 Frequency Measurement Accuracy Test Proceed as follows to test the Input 2 frequency measurement accuracy: 1. Connect the test tool to the 5500A as shown in Figure 4-3. ST8588.wmf Figure 4-3.

  • Page 62: Input 2 Trigger Level And Trigger Slope Test

    Service Manual 4.5.5 Input 2 Trigger Level and Trigger Slope Test Proceed as follows: 1. Connect the test tool to the 5500A as for the previous test shown in Figure 4-3. 2. Select the AUTO test tool setup: • Press to select the MENU.
  • Page 63 Performance Verification 4.5 Input 1 and Input 2 Tests in the SCOPE MODE. • Press .to select the TIME BASE menu. • Press to select SINGLE. • mark changes to I. Press to confirm; • Press to highlight Trigger slope. •...

  • Page 64: Input 2 Trigger Sensitivity Test

    Service Manual 17. 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. 18. When you are finished, set the 5500A to Standby. 4.5.6 Input 2 Trigger sensitivity Test. Proceed as follows to test the Input 2 trigger sensitivity: 1.

  • Page 65: Input 1 Trigger Level And Trigger Slope Test

    Performance Verification 4.5 Input 1 and Input 2 Tests in the SCOPE MODE. 8. Select timebase of 10 µs/d. • Press to select RANGE. • to select 10 µs/d. Press 9. Set the 5500A to source a 20 kHz leveled sine wave of 100 mV peak-to-peak (if necessary adjust the 5500A to half a division peak-to-peak on the display).
  • Page 66 Service Manual • Press to select Input 1 RANGE. • Press to select 1V/d. • Press to select a timebase of 10 ms/d. • Press to leave RANGE 1. • Press to select TRIGGER. • Using set the trigger level to +2 divisions from the screen center. For positive slope triggering, the trigger level is the top of the trigger icon ( ).

  • Page 67: Input 1 And 2 Dc Voltage Accuracy Test

    Performance Verification 4.5 Input 1 and Input 2 Tests in the SCOPE MODE. 11. Set the 5500A to source +3V DC. 12. Set the trigger level to +2 divisions from the screen center. For negative slope triggering, the trigger level is the bottom of the trigger icon ( ). •...
  • Page 68 Service Manual 3. Select DC coupling & reading for Input 1 and 2. • Press to select menu SCOPE SETUP. • Press to select Input 1 READING. • Press to highlight DC. • mark changes to I. Press to confirm; •...

  • Page 69: Input 1 And 2 Ac Voltage Accuracy Test

    Performance Verification 4.5 Input 1 and Input 2 Tests in the SCOPE MODE. Table 4-2. Volts DC Measurement Verification Points Sensitivity 5500A output, DC Reading V DC Input 1 Input 2 Input 1 Input 2 [mV or V/div] [A or kA/div] 5 mV/div 5 A/div 15 mV...
  • Page 70 Service Manual 2. Select the AUTO test tool setup: • Press to select the MENU. • Press till SCOPE is highlighted. • Press to select SCOPE mode 3. Select DC coupling & reading for Input 1 and 2. • Press to select menu SCOPE SETUP.

  • Page 71: Input 1 And 2 Ac Input Coupling Test

    Performance Verification 4.5 Input 1 and Input 2 Tests in the SCOPE MODE. Table 4-3. Volts AC Measurement Verification Points Sensitivity Time 5500A output 5500A Reading 1 & 2 base Volts rms Frequency Input 1 Input 2 Input 1 Input 2 200 mV/div 200A/div 10 ms/d...

  • Page 72: Input 1 And 2 Volts Peak Measurements Test

    Service Manual • Press to select the Input 2 COUPLING. • Press to highlight AC Coupling. • mark changes to I. Press to confirm; • Press to return to SCOPE. 4. Set the 5500A to source an AC voltage, to the first test point in Table 4-4 (NORMAL output, WAVE sine).

  • Page 73: Input 1 And 2 Phase Measurements Test

    Performance Verification 4.5 Input 1 and Input 2 Tests in the SCOPE MODE. • Press to highlight DC Coupling. • mark changes to I. Press to confirm; • Press select Input 2 READING. • Press to select the Input 2 READING. •...

  • Page 74: Input 1 And 2 High Voltage Ac & Dc Accuracy Test

    Service Manual • Press to select Input 2 READING. • Press to select the Input 2 READING. • Press to highlight Phase. • mark changes to I. Press to confirm; • Press to highlight Input 2 Coupling. • Press to select the Input 2 COUPLING. •...
  • Page 75 Performance Verification 4.5 Input 1 and Input 2 Tests in the SCOPE MODE. ST8129.WMF Figure 4-6. Test Tool Input 1-B to 5500A Normal Output for >300V 2. Select the AUTO test tool setup: • Press to select the MENU. • Press till SCOPE is highlighted.
  • Page 76 Service Manual • Press to select RANGE 1 or RANGE 2. • Press to select RANGE 1 or • Press to select RANGE 2. • Press to select the ranges mentioned in the table. 5. Set the 5500A to source the appropriate DC voltage (NORMAL output, WAVE sine).

  • Page 77: Ohms/Continuity/Capacitance

    Performance Verification 4.6 Ohms/Continuity/Capacitance. 11. Observe the Input 1 and 2 main reading (AC) and check to see if it is within the range shown under the appropriate column. 12. Continue through the test points of table 4-7. 13. When you are finished, set the 5500A to Standby Table 4-7.

  • Page 78: Diode Test Function Test

    Service Manual 2. Select OHMS/CONTINUITY/CAPACITANCE: • Press to select the main MENU. • Press to highlight OHMS/CONTINUITY/CAPACITANCE. • Press to select the item. 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”...

  • Page 79: Continuity Function Test

    Performance Verification 4.6 Ohms/Continuity/Capacitance. 4.6.3 Continuity Function Test Proceed as follows: 1. Connect the test tool to the 5500A as for the previous test (see Figure 4-7). 2. Select OHMS/CONTINUITY/CAPACITANCE: • Press to select the main MENU. • Press to highlight OHMS/CONTINUITY/CAPACITANCE. •...

  • Page 80: Inrush Current

    Service Manual 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 0.00 to 0.10 (remove test tool input connections ) (see steps 7...10) 4.7 Inrush Current.

  • Page 81: Sags & Swells

    Performance Verification 4.8 Sags & Swells mark changes to I. 8. Press to confirm; 9. Press to highlight START. 10. Press to start the measurement. 11. Set the 5500A to 1.5V DC. Now the measurement should start and continue for 10s. The trigger point is after 2 divisions.

  • Page 82: Harmonics

    Service Manual 4. Set the 5500A to source a sine wave of 5V, 60Hz (NORMAL output, MODE wave sine). 5. Press to highlight START. 6. Press 7. After approximately 30 seconds press 8. Press and move the cursor into the measured region. 9.

  • Page 83: Volt/Amps/Hertz

    Performance Verification 4.10 VOLT/AMPS/HERTZ. Proceed as follows to test VOLT/AMPS/HERTZ: 1. Connect the test tool to the 5500A as for the previous test shown in Figure 4-9. 2. Press 3. Press to highlight VOLT/AMPS/HERTZ. 4. Press to select VOLT/AMPS/HERTZ. 5. Set the 5500A to source the AC voltages in the table (NORMAL output, Wave sine) and check the readings.

  • Page 84: Transients

    Service Manual 4.12 Transients. Proceed as follows to test the TRANSIENTS function: 1. Connect the test tool to the 5500A as show in Figure 4-12. ST8586.WMF Figure 4-12. Test Tool Input 1 to 5500A Normal Output 2. Press 3. Press to highlight TRANSIENTS.

  • Page 85: 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................5-4 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 87: General

    5.1.1 Introduction The following information, provides the complete Calibration Adjustment procedure for the Fluke 43B 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 88: General Instructions

    Ensure that the test tool battery is charged sufficiently. 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 89 Calibration Adjustment 5.3 Starting Calibration Adjustment The Calibration Adjustment Procedure uses built-in calibration setups, that can be accessed in the Maintenance mode. To enter the Maintenance mode proceed as follows: • Press and hold • Press and release • Release •...

  • Page 90: Contrast Calibration Adjustment

    Service Manual Functions of the keys F1-ENTER are: PREV select the previous step NEXT select the next step start the calibration adjustment of the actual step EXIT leave the Maintenance mode Readings and traces After completing a calibration step, readings and traces are shown using the new calibration data.

  • Page 91: Warming Up & Pre-Calibration

    Calibration Adjustment 5.5 Warming Up & Pre-Calibration Figure 5-2. Display Test Pattern 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:...

  • Page 92: Hf Gain Input 1

    Service Manual 5.6.1 HF Gain Input 1. Proceed as follows to do the HF Gain Input 1&2 calibration: 1. Press to select the first calibration step in Table 5-1 ( HFG & FI AB (CL 0600): 2. Connect the test tool to the 5500A as shown in Figure 5-3. Do NOT use a 50Ω termination! ST8097.WMF Figure 5-3.

  • Page 93: Delta T Gain, Trigger Delay Time & Pulse Adjust Input 1

    Calibration Adjustment 5.6 Final Calibration Table 5-1. HF Gain Calibration Points Fast Cal step 5500A Setting Test Tool Input Signal Requirements (1 kHz, no 50 Ω!) (1 kHz, t <100 ns, flatness after rising rise edge: <0.5% after 200 ns) HFG &...

  • Page 94: Gain Dmm (Gain Volt)

    Service Manual ST8004.WMF Figure 5-4. 5500A Scope Output to Input 1 3. Set the 5500A to source a 1V, 1 MHz fast rising (rise time ≤ 1 ns) square wave (SCOPE output, MODE edge). 4. Set the 5500A to operate (OPR). 5.
  • Page 95 Calibration Adjustment 5.6 Final Calibration ST8001.WMF Figure 5-5. 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.

  • Page 96: Volt Zero

    Service Manual 10. Connect the test tool to the 5500A as shown in Figure 5-6. ST8129.WMF Figure 5-6. 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 97: Capacitance Gain Low And High

    Calibration Adjustment 5.6 Final Calibration ST8003.WMF Figure 5-7. 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. For the higher values, the 5500A will turn off the “COMP 2 wire”...

  • Page 98: Capacitance Clamp & Zero

    Service Manual ST8002.WMF Figure 5-8. 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. Low (CL 0900):READY 7.

  • Page 99: Save Calibration Data And Exit

    Calibration Adjustment 5.7 Save Calibration Data and Exit 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. 5.7 Save Calibration Data and Exit Proceed as follows to save the calibration data, and to exit the Maintenance mode: 1.
  • Page 100 Service Manual • To exit and save the INVALID calibration data: Press YES. The test tool will show the message The test tool needs calibration. Please contact at power on. The calibration date and number will not be your service center updated.

  • Page 101: Disassembling

    Chapter 6 Disassembling 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............. 6-5 6.2.6 Removing the Display Assembly............

  • Page 103: Introduction

    Disassembling 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. Always remove the battery pack before completely disassembling the test tool.
  • Page 104 Service Manual ST8562.EPS Figure 6-1. Fluke 43B Main Assembly...

  • Page 105: Removing The Main Pca Unit

    Disassembling 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 106: Removing The Display Assembly

    Service Manual 6.2.6 Removing 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.
  • Page 107 Disassembling 6.3 Disassembling 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. Failures typically show up when contaminated units are operated in humid areas.

  • Page 108: 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 1, 2 item 9, COM input item 10, see Figure 4-6).
  • Page 109 Disassembling 6.5 Reassembling the Test Tool ST8185.EPS Figure 6-4. Mounting the display shielding bracket ST78197.EPS Figure 6-5. Battery pack installation...

  • Page 110: 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 112: 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 113: 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 114 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 115: Starting With A Dead Test Tool

    Service Manual 1. Check the SLOW ADC, see 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.

  • Page 116: Test Tool Software Does Not Run

    Corrective Maintenance 7.5 Miscellaneous Functions TP307 (N501 pin 72, REFP) for 1.22V, check V301/R307. If no 1.22V, and V301/R307 and connections are correct, then replace N501. c. Check N501 pin 12 (NETVALID) for +2.6V. If not correct, proceed as indicated in 7.3, step 6. d.

  • Page 117: Fly Back Converter

    Service Manual MS417-418: LCDAT2,3 for 250 ns pulses MS412 LINECLK, for 120 ns pulses, ≅16 kHz MS411 FRAME, for 250 ns pules, ≅66Hz MS409 M, for a ≅625Hz square wave. c. MS406 +5VA for +5V MS405 +3V3D for +3.3V MS401 -30VD for -30V (from Fly Back Converter). d.

  • Page 118: Slow Adc

    Corrective Maintenance 7.5 Miscellaneous Functions 3. Check TP552 (FLYGATE) for a square wave voltage of at least some volts (for a correct Fly Back Converter 50...100 kHz, ≅10 Vpp). a. If a square wave is present on TP552 (may be not the correct value), then: 1.

  • Page 119: Keyboard

    Service Manual Measure TEMP on N501 pin 5 (=X503 pin 6); TEMP senses the battery temperature. Measure IBATP on X503 pin 3 (= N501 pin 9); IBATP senses the battery current. 4. +3V3SADC must be +3.3V (supplied by N501 pin 65). If not correct, check if the +3V3SADC line is shorted to ground.

  • Page 120: Optical Port (Serial Rs232 Interface)

    Corrective Maintenance 7.5 Miscellaneous Functions 7.5.5 Optical Port (Serial RS232 Interface) Receive (RXD) 1. Check the voltage RXDA on TP522 for +200 mV, and the voltage RXD on TP527 (buffered and amplified RXDA voltage) for +3.3V. 2. Shine with a lamp in the optical port (H522). Check the voltage RXDA on TP522 for 0...-0.6V, and RXD on TP527 for 0V.

  • Page 121: Ohms And Capacitance Measurements

    Service Manual 7. Check TP151 (POS-A) and TP251 (POS-B) for about +1.1V (trace at mid-screen), +0.4V (trace at top of screen), +1.8V (trace at bottom of screen). If not correct check the PWM circuit (in the Digital Circuit). 8. Check TP152 (OFFSET-A) and TP252 (OFFSET-B) for about +1.1V. 9.

  • Page 122: Trigger Functions

    Corrective Maintenance 7.5 Miscellaneous Functions the table below. If not correct, the protection circuit or the current source in the T-ASIC (N301) may be defective. If the current is correct, and the Volt function is correct (so ADC is correct), then the Ohms part in the C-ASIC is defective: replace N101.

  • Page 123: Reference Voltages

    Service Manual 7.5.9 Reference Voltages 1. Check: a. TP306 for +3.3V, TP307 for +1.23V If not correct check/replace V301, R307, C3112, P-ASIC N501. b. TP301 for +1.6V ; TP302 for +0.1V ; TP304 for +3.3V ; TP310, see figure below (in ROLL mode TP310 is zero). If not correct, check/replace REFERENCE GAIN circuit and T-ASIC N301.

  • Page 124: Power On/Off

    Corrective Maintenance 7.5 Miscellaneous Functions 4. In the terminal program type capital characters X (no ENTER!). After a number of characters the test tool mask software will respond with an acknowledge 0 (zero). This indicates that the communication between the Terminal program and the test tool is accomplished.

  • Page 125: 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 ..............8-23...

  • Page 127: Introduction

    8.1 Introduction 8.1 Introduction This chapter contains an illustrated list of replaceable parts for the model 43B 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.

  • Page 128: 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 43B 4022 244 98361 Window/decal Fluke 43B 4022 243 09841 shielding foil 5322 466 11434...
  • Page 129 List of Replaceable Parts 8.3 Final Assembly Parts ST8562.WMF Figure 8-1. Fluke 43B Final Assembly...

  • Page 130: 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 131: Main Pca Parts

    List of Replaceable Parts 8.5 Main PCA Parts 8.5 Main PCA Parts See Figures 9-7 ... 9-10 at the end of Chapter 9 for the Main PCA drawings. Table 8-3. Main PCA Reference Description Ordering Code Designator Led Holder for H521 and H522 5322 255 41213 Screw for Input Banana Jack Assembly 5322 502 14362...
  • Page 132 Service Manual Reference Description Ordering Code Designator 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 CHIPCAP NP0 0805 5% 1NF 5322 126 10511 C145 CHIPCAP NP0 0805 5% 1NF...
  • Page 133 List of Replaceable Parts 8.5 Main PCA Parts Reference Description Ordering Code Designator C233 CER CHIP CAP 63V 5% 47PF 5322 122 32452 C234 CER CHIP CAP 63V 5% 470PF 5322 122 32268 C236 CER CHIP CAP 63V 10% 4.7NF 5322 126 10223 C242 CHIPCAP NP0 0805 5% 1NF...
  • Page 134 Service Manual Reference Description Ordering Code Designator 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 11838 C314 ALCAP SANYO 25V 20% 10UF 5322 124 11838 C317 ALCAP NICHICON 6.3V 20% 22UF...
  • Page 135 List of Replaceable Parts 8.5 Main PCA Parts Reference Description Ordering Code Designator C402 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C403 CER CHIPCAP 25V 20% 100NF 5322 126 13638 C404 CER CHIP CAP 63V 5% 470PF 5322 122 32268 C407 CER CHIPCAP 25V 20% 100NF 5322 126 13638...
  • Page 136 Service Manual Reference Description Ordering Code Designator C481 CER CHIP CAP 63V 5% 22PF 5322 122 32658 C482 CER CHIP CAP 63V 5% 22PF 5322 122 32658 C483 CER CHIP CAP 63V 5% 22PF 5322 122 32658 C484 CER CHIP CAP 63V 5% 22PF 5322 122 32658 C485...
  • Page 137 List of Replaceable Parts 8.5 Main PCA Parts Reference Description Ordering Code Designator C555 ELCAP 10V 20% 390UF 5322 124 11844 C561 ALCAP SANYO 6,3V 20% 150UF 5322 124 11841 C562 ALCAP SANYO 6,3V 20% 150UF 5322 124 11841 C563 ALCAP SANYO 6,3V 20% 150UF 5322 124 11841...
  • Page 138 Service Manual Reference Description Ordering Code Designator D480 4X2-INP OR 74LVC32APW 4022 304 10771 D531 * 8-INP MUX 74HC4051D PEL 9337 148 20653 H495 PE BUZZER PKM13EPP-4002 MUR 5322 280 10311 H521 IR LED SFH409-2 5322 130 61296 H522 PHOTODIODE OP906 OPT 5322 130 10777 K171 DPDT RELAY...
  • Page 139 List of Replaceable Parts 8.5 Main PCA Parts Reference Description Ordering Code Designator N301 * T-ASIC OQ0257 5322 209 13142 N501 * P-ASIC OQ0256 5322 209 13143 N531 * LOW POW OPAMP LMC7101BIM5X NSC 5322 209 15144 N600 * LAMP CONTROLLER UC3872DW 5322 209 14851 MTL FILM RST MRS25 1% 220K 0.25W 4822 053 20224...
  • Page 140 Service Manual Reference Description Ordering Code Designator R137 RESISTOR CHIP RC-02H 1% 56K2 5322 117 10574 R138 RESISTOR CHIP RC-02H 1% 56K2 5322 117 10574 R139 RESISTOR CHIP RC-02H 1% 56K2 5322 117 10574 R140 RESISTOR CHIP RC-02H 1% 56K2 5322 117 10574 R141 RESISTOR CHIP RC12G 1% 215K...
  • Page 141 List of Replaceable Parts 8.5 Main PCA Parts Reference Description Ordering Code Designator R206 PTC THERM DISC 600V 300-500E 5322 116 40274 R209 RESISTOR CHIP RC12H 1% 2K15 5322 117 12452 R211 RESISTOR CHIP RC11 2% 10M 4822 051 20106 R212 RESISTOR CHIP RC11 2% 10M 4822 051 20106...
  • Page 142 Service Manual Reference Description Ordering Code Designator R288 RESISTOR CHIP RC12H 1% 10E 5322 117 12464 R289 RESISTOR CHIP RC12H 1% 10E 5322 117 12464 R290 SMD RES 56K2 1% TC100 1206 5322 117 13488 R291 SMD RES 56K2 1% TC100 1206 5322 117 13488 R292 SMD RES 56K2 1% TC100 1206...
  • Page 143 List of Replaceable Parts 8.5 Main PCA Parts Reference Description Ordering Code Designator R352 RESISTOR CHIP RC12H 1% 5K11 5322 117 12469 R353 RESISTOR CHIP RC12H 1% 4822 117 11154 R354 RESISTOR CHIP RC-02H 1% 261E 4822 051 52611 R356 RESISTOR CHIP RC-02H 1% 261E 4822 051 52611 R369...
  • Page 144 Service Manual Reference Description Ordering Code Designator R436 RESISTOR CHIP RC12H 1% 26K1 5322 117 12448 R438 RESISTOR CHIP RC12H 1% 147K 5322 117 12478 R439 RESISTOR CHIP RC12H 1% 21K5 5322 117 12477 R441 RESISTOR CHIP RC12H 1% 3K16 5322 117 12465 R442 RESISTOR CHIP RC12H 1% 1K47...
  • Page 145 List of Replaceable Parts 8.5 Main PCA Parts Reference Description Ordering Code Designator R507 RES FRC01 1206 5% 1E 4822 117 11151 R508 RESISTOR CHIP RC12H 1% 10K 4822 117 10833 R509 RESISTOR CHIP RC12H 1% 46E4 5322 117 12463 R512 RESISTOR CHIP RC12H 1% 2K87 5322 117 12608...
  • Page 146 Service Manual Reference Description Ordering Code Designator R603 RESISTOR CHIP RC12H 1% 100K 4822 117 10837 R604 RESISTOR CHIP RC12H 1% 4822 117 11154 R605 SMD RES 10K 1% TC50 0805 4022 301 22071 R606 SMD RES 6K19 1% TC50 0805 4022 301 22021 T552 BACKLIGHT TRANSFORMER PT73458...

  • Page 147: Accessory Replacement Parts

    List of Replaceable Parts Reference Description Ordering Code Designator V551 * RECT DIODE BYD77A 5322 130 10763 V554 * N-CHAN MOSFET 2SK974STR HIT 5322 130 62921 V555 * RECT DIODE BYD77A 5322 130 10763 V561 * SCHOTTKY DIODE MBRS340T3 MOT 5322 130 10674 V562 * SCHOTTKY DIODE MBRS340T3 MOT...
  • Page 154 C204 C104 V302...

  • Page 156: Circuit Diagrams

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

  • Page 158: 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 159 Service Manual Table 9-1. Parts Location Main PCA Side 1 B402 C4 4, J10 C339 B3 3, G11 N301 B3 3, D9 B403 C4 4, J11 C392 D3 3, G2 N501 D5 5, E5 C395 C3 3, B10 C101 A2 1, E3 C399 C3 3, A11 B1 1, E2 C102 A1 1, E2...
  • Page 160 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 R109 D2 1, E5 C332 C4 3, E10 C482 B4 4, J11 R110 C2 1, A4 C107 D2 1, D5 C342 C3 3, G11 C483 B4 4, J10...
  • Page 161 Service Manual R217 A2 2, B3 R311 C3 3, G6 R469 B4 4, J12 R565 A5 5, F14 R218 A2 2, D3 R326 B3 3, C6 R470 B5 4, B12 R570 B5 5, C12 R219 A3 2, C4 R331 C3 3, C7 R471 B4 4, H7 R580 A4 5, A8 R220 A2 2, B4...

  • Page 162: Modifications

    Chapter 10 Modifications Title Page 10.1 Software modifications ................10-3 10.2 Hardware modifications................10-3 10-1...

  • Page 164: Software Modifications

    3. Revision 03 In the Fluke 43B Test Tool, version 3 of the Printed Circuit Board (PCB) is used for the Main PCA. The version of the PCB is indicated by the last digit of the 12 digit number on the PCB edge near N501.

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