Keysight 669 A Series Service Manual
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Keysight 669 A Series Service Manual

Keysight 669 A Series Service Manual

Gpib dc power supplies
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  • Page 1 T h e t e s t & me a s u r e me n t e q u i p me n t y o u n e e d a t t h e p r i c e y o u w a n t . A l l t e s t I n s t r u me n t s , I n c .
  • Page 2 Keysight Series 669xA GPIB DC Power Supplies Service Manual...
  • Page 4 For instruments with Serial Numbers: Keysight 6690A: MY41000131 Keysight 6691A: MY41000119 Keysight 6692A: MY41000133 For manual updates, a change page may be included. For a history of manual updates, see Appendix A. Keysight Part No. 5969-2907 Printed in Malaysia December, 2014...
  • Page 5 90 days from date of delivery. During the warranty period Keysight Technologies will, at its option, either repair or replace products which prove to be defective.
  • Page 6 SAFETY CONSIDERATIONS GENERAL. This is a Safety Class 1 instrument (provided with terminal for connection to protective earth ground). OPERATION. BEFORE APPLYING POWER verify that the product is set to match the available line voltage, the correct line fuse is installed, and all safety precautions (see following warnings) are taken. In addition, note the instrument's external markings described under "Safety Symbols".
  • Page 7 This document contains proprietary information protected by copyright. All rights are reserved. No part of this document may be photocopied, reproduced, or translated into another language without the prior consent of Keysight Technologies. The information contained in this document is subject to change without notice.

  • Page 8: Table Of Contents

    Table of Contents Introduction .................................... 7 Scope and Organization ..............................7 Instrument Identification..............................7 Related Documents ................................8 Manual Revisions................................7 Firmware Revisions ................................. 8 Safety Considerations ................................. 8 Electrostatic Discharge ............................... 8 Verification....................................9 Introduction..................................9 Tests ....................................9 Test Equipment Required..............................
  • Page 9 A1DSP1 LCD Display ..............................51 A1G1 and A1G2 Rotary Controls ..........................51 A1KPD Keypad ................................51 Output Bus Boards A7, A81 and A9 & Chassis Components..................52 Principles of Operation ................................ 59 Introduction..................................59 A2 GPIB Board................................. 59 A1 Front Panel Assembly ..............................60 A10 Control Board................................

  • Page 10: Introduction

    Instrument Identification Keysight Technologies instruments are identified by a 10-digit serial number. The format is described as follows: first two letters indicate the country of manufacture. The next four digits are a code that identify either the date of manufacture or of a significant design change.

  • Page 11: Related Documents

    (Keysight P/N 9300-0797, or equivalent).  using a conductive wrist strap, such as Keysight P/N 9300-0969 or 9300-0970.  grounding all metal equipment at the station to a single common ground.

  • Page 12: Verification

    Verification Introduction This chapter provides test procedures for checking the operation of Keysight Series 669xA power supplies. The required test equipment is specified and sample performance test record sheets are included. Instructions are given for performing the tests either from the front panel or from a controller over the GPIB.

  • Page 13: Programming The Tests

    Power: each Keysight N3306A per 7kW minimum mainframe for all units Resistor Load 6.6 Kilowatt minimum Keysight 6690A = 34.1 milliohms 6600W Keysight 6691A = 136 milliohms 6600W Keysight 6692A = 545 milliohms. 6600W Oscilloscope Sensitivity: 1mV Keysight Infinium...

  • Page 14: General Measurement Techniques

    Table 2-2 lists the programming voltage and current values for each model. You can enter these values either from the front panel or from a controller over the GPIB. Table 2-2. Programming Voltage and Current Values Keysight Model Full Scale Max. Prog.

  • Page 15: Constant Voltage (Cv) Tests

    Constant Voltage (CV) Tests Test Setup Connect your dc voltmeter leads to only +S and -S (see Figure 2-1), because the power supply regulates the voltage between these points, not between the + and - output terminals. Test Procedures Perform the test procedures in Table 2-4. The CV tests are: ...
  • Page 16 Table 2-4. Constant Voltage (CV) Tests Action Normal Result Voltage Programming and Readback Accuracy This test verifies that the voltage programming, GPIB readback (GPIB system power supplies only), and front panel display functions are within specifications. With system power supplies, values read back over the GPIB should be the same as those displayed on the front panel.
  • Page 17 Turn off the power supply and connect an a-c coupled oscilloscope across the + and -output terminals (see Fig. 2-1). Set the oscilloscope bandwidth limit to 20MHz (30MHz for the Keysight 54504A) and use an RF tip on the oscilloscope probe.

  • Page 18: Constant Current (Cc) Tests

    Table 2-4. Constant Voltage (CV) Tests (continued) Action Normal Result Transient Recovery (cont) Program the Electronic Load as follows:  Operating mode to constant current.  Input load current to 1/2 the supply's full rated output current.  Transient current level to the supply's full rated output current. ...
  • Page 19 Electronic Load Current Monitor Resistor Power Supply a) CC Test Setup w ith 6.6kW Electronic Load * Note: Series power source required f or CC Load Regulation Test, allows UUT to operate at 0 v olts and electronic load to operate at its minimum input v oltage specif ication.
  • Page 20 Note : Refer to Figure 2-3. If you are using Keysight N3306A electronic loads, a series DC power source is required to supply the minimum 3 volt input required by the Keysight N3306A electronic loads. The series DC source must be capable of 3VDC at a current level that is greater than the output current of the supply being tested.
  • Page 21 Table 2-5. Constant Current (CC) Tests (continued) Action Normal Result CC Source Effect This test measures the change in output current resulting from a change in ac line voltage from its minimum to its maximum value within the line voltage specifications. It is recommended that you use averaged readings for Steps 6 and 8 of this test (see "Averaging AC Measurements"...

  • Page 22: Averaging The Cc Measurements

    You can do this by making each measurement several times and then using the average of the measurements as your test value. Voltmeters such as the Keysight 3458A System Voltmeter can be programmed to take just such statistical average readings as required by these tests.
  • Page 23 Table 2-6. Performance Test Record Form Test Facility: __________________________________________ Report No._________________________________________ __________________________________________ Date______________________________________________ __________________________________________ Customer__________________________________________ Model_____________________________________ Tested By__________________________________________ Serial No __________________________________ Ambient Temperature (C)_____________________________ Options ___________________________________ Relative Humidity (%)________________________________ Firmware Revision ___________________________ Nominal Line Frequency (Hz)__________________________ Special Notes: ____________________________________________________________________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________...
  • Page 24 Table 2-7. Performance Test Record for Keysight Model 6690A MODEL Keysight_____________ Report No.________ Date___________ Test Description Minimum Spec. Results Maximum Spec. Constant Voltage Tests Voltage Programming and Readback Low Voltage (0V) V -15mV ________mV +15mV Front Panel Display Readback - 22.5mV ________mV + 22.5mV...
  • Page 25 Table 2-8. Performance Test Record for Keysight Model 6691A MODEL Keysight_____________ Report No.________ Date___________ Test Description Minimum Spec. Results Maximum Spec. Constant Voltage Tests Voltage Programming and Readback Low Voltage (0V) V -30mV ________mV +30mV Front Panel Display Readback - 45mV...
  • Page 26 Table 2-9. Performance Test Record for Keysight Model 6692A MODEL Keysight_____________ Report No.________ Date___________ Test Description Minimum Spec. Results Maximum Spec. Constant Voltage Tests Voltage Programming and Readback Low Voltage (0V) V -60mV ________mV +60mV Front Panel Display Readback - 90mV...

  • Page 28: Troubleshooting

    To gain access to IC pins. AP Products No. LTC Ammeter/Current Shunt To measure output current. Keysight 6690A: Burster 1280 Keysight 6691A, 6692A: Guildline 9230/300 Oscilloscope To check waveforms and signal levels. Keysight 54504A GPIB Controller To communicate with power supply Keysight BASIC series via the GPIB (for system units).

  • Page 29: Power-On Selftest

    Power-On Selftest Description The procedures in the troubleshooting charts make use of the power-on selftest. The power-on selftest tests the front panel, GPIB interface (for GPIB system power supplies), and secondary interface circuits. If the power supply fails the selftest, the output remains disabled (turned off) and the front panel normally displays an error code or message (see Table 3-2).
  • Page 30 Table 3-2. Selftest Error Codes/Messages Code and/or Description Probable Cause Selftest Error Message Codes/Messages El FP RAM Front panel RAM test failed (power-on). A1 board probably defective.* E2 FP ROM Front panel ROM test failed (power-on A1 board probably defective.* and *TST?).
  • Page 31 START "OVERALL TROUBLESHOOTING" DID YOU DO TROUBLE SHOOTING IN PERFORM CHECKS IN OPERATING PAGE 3-5 IN OPERATING MANUALS, MANUAL ? TURN OFF SUPPLY AND REMOVE THE TOP COVER AND RFI SHIELD. DISCONNECT LOAD. CONNECT SENSE TERMINALS FOR LOCAL SENSING. TURN ON SUPPLY AND CHECK FOR INDICATION (FAN RUNNING, DISPLAY ON, DC RAIL LED DS420, DS421 ON) THAT AC POWER IS ON.
  • Page 32 FROM SHEET 1 VOLTAGE READS DISPLAY WITH- PROBABLE DEFECTIVE A10 BOARD OK BUT OUTSIDE IN SPECS? SPECS? CALIBRATE SUPPLY. IS CV PROBABLE DEFECTIVE A10 BOARD ANNUNCIATOR TURN OFF SUPPLY AND CONNECT A SHUNT (SEE TABLE 3-1) ACROSS THE OUTPUT TERMINALS. TURN ON SUPPLY AND PROGRAM FULL-SCALE VOLTAGE AND CURRENT.
  • Page 33 FROM SHEET 2 PROGRAM OV TO MAXIMUM AND PRESS PROT CLEAR KEY. OUTPUT SHOULD GO TO FULL SCALE VOLTAGE. PRESS OUTPUT ON/OFF REPEATEDLY WHILE WATCHING VOLTAGE DISPLAY. DOWN- PROGRAMMING SHOULD TAKE < 1 SECOND. GO TO 'SLOW DOWN PROGRAMMING' LESS THAN 1 SECOND? TROUBLESHOOTING (SEE FIG.
  • Page 34 FROM SHEET 1 FROM SHEET 2 VOLT- PROT OUTPUT GO TO "OUTPUT HELD LOW" AGE RIGHT BUT ANNUNCIATOR VOLTAGE NEAR TROUBLESHOOTING FIG. 3-5 OUTSIDE SPEC? PROBABLE DEFECTIVE A10 BOARD GO TO "OUTPUT HELD HIGH" PRESS PROTECT KEY TROUBLESHOOTING FIG. 3-6. "OT"...
  • Page 35 START WARNING: "NO DISPLAY" THS CONFIGURATION IS FOR THE TEST ONLY. DO NOT TURN OFF SUPPLY, REMOVE TOP COVER AND RFI FLOAT THE OUTPUT OR ATTEMPT TO OPERATE THE SUPPLY. SHIELD. UNPLUG CABLE W5 FROM J108 ON A2 GPIB BOARD AND UNPLUG CABLE W4 FROM J507 ON A10 CONTROL BOARD.
  • Page 36 START "OV WILL NOT FIRE" TURN OFF SUPPLY, REMOVE TOP COVER AND RFI SHIELD. TURN ON SUPPLY AND CHECK BIAS AND REFERENCE VOLTAGES (TEST POINTS 15 THROUGH 22 . SEE TABLE 6-3). PROBABLE DEFECTIVE A6 BOARD VOLTAGES OK? TURN SUPPLY ON AND PROGRAM THE OUTPUT VOLTAGE AND CURRENT TO 1/2 SCALE.
  • Page 37 START WARNING: "OV AT TURN-ON" DURING THESE TESTS THE OUTPUT MAY BE AT HAZARDOUS LEVELS. CHECK THAT THE OUTPUT VOLTAGE SETTING IS NOT HIGHER THAN THE OV SETTING IN THE CONNECT A DC SCOPE ACROSS THE OUTPUT TERMINALS. TURN ON SUPPLY AND CHECK MEMORY REGISTER.
  • Page 38 START "OUTPUT HELD LOW" THE OUTPUT IS HELD LOW AND PROT IS NOT ON. TURN OFF SUPPLY, DISCONNECT THE LOAD, REMOVE TOP COVER AND RFI SHIELD. TURN ON SUPPLY AND CHECK BIAS VOLTAGES (TEST POINTS 9 THROUGH 22 , SEE TABLE 6-3). PROBABLE DEFECTIVE VOLTAGES A6 BOARD...
  • Page 39 START "OUTPUT HELD HIGH" TURN OFF THE SUPPLY AND REMOVE THE COVER AND RFI SHIELD. DISCONNECT LOAD. TURN SUPPLY ON AND CHECK THE BIAS AND REFERENCE VOLTAGES (TEST POINTS 9 THROUGH 22 . SEE TABLE 6-3. PROBABLE DEFECTIVE A6 BOARD VOLTAGES DISABLE THE OV CIRCUIT BY LIFTING A10R536.
  • Page 40 START "DAC DEFECTIVE" * IF THE SUPPLY FAILS SELF TEST, TURN OFF TURN OFF SUPPLY AND REMOVE TOP COVER. THE SUPPLY, DEPRESS THE 7 KEY AND THEN TURN ON SUPPLY AND CHECK BIAS AND TURN IT ON WHILE HOLDING THE KEY DOWN REFERENCE VOLTAGES (TEST POINTS 9 SO AS TO SKIP SELF TEST.
  • Page 41 START "SERIAL DOWN" WARNING: THIS REMOVES THE GPIB BOARD FROM THE DATA PATH AND CONNECTS THE TURN OFF SUPPLY, REMOVE TOP COVER AND RFI SHIELD. FRONT PANEL DIRECTLY TO THE CONTROL BOARD. UNPLUG CABLE W5 FROM J108 ON A2 GPIB BOARD AND THIS CONFIGURATION IS FOR TEST ONLY.
  • Page 42 START "SECONDARY DOWN" DISPLAY READS "SECONDARY DN". TURN OFF SUPPLY AND REMOVE TOP COVER. TURN ON SUPPLY AND CHECK FOR SERIAL DATA PULSES AT A2U110-8 TEST POINT WITH RESPECT TO PRIMARY GROUND (SEE TABLE 6-3). PULSES PROBABLE DEFECTIVE A2 BOARD AT A2U110-8? CHECK FOR 5V AT A2U110-8 WITH RESPECT TO SECONDARY COMMON (A2U110-5) 12...
  • Page 43 START "SLOW DOWN PROGRAMMING" TURN ON SUPPLY AND PROGRAM OUTPUT VOLTAGE AND CURRENT TO 1/2 FULL SCALE. CHECK VOLTAGE LEVELS AT A10U609-1 AND A10U610-1 WITH RESPECT TO SECONDARY COMMON 36 . SEE TABLE 6-3. CHECK FUSES A9F980, F981 BY MEASURING CONTINUITY A10U610-1 PROBABLE DEFECTIVE A10 BOARD = +2.5V?
  • Page 44 Note Because test points on the FET board are not accessible when the board is installed, troubleshooting must be performed with the board removed from the power supply (refer to the disassembly procedures at the back of this chapter If any power FET (Q201-204, Q301-304, Q211, Q311, Q222, Q322, Q233, Q333, Q244, Q344) is defective, you must replace all eight with a matched set.

  • Page 45: Firmware Revisions

    Firmware Revisions Firmware revision labels are located on the Front panel ROM, AlU3, and on the Secondary microprocessor, A5U504. You can obtain the revisions with the GPIB *IDN? query command. The following sample Keysight BASIC program does this: 10 ALLOCATE L$[52] 20 OUTPUT 705;"*IDN?"...

  • Page 46: Post-Repair Calibration

    Figure 3-12. Test Header Jumper Positions Post-Repair Calibration When Required Calibration is required annually and also whenever certain components are replaced. If components in any of the circuits listed below are replaced, the supply must be recalibrated. Note For calibration procedures, see Appendix A of the Operating Manual. Location Component A10 Control Board...

  • Page 47: Restoring Factory Calibration Constants

    Restoring Factory Calibration Constants This procedure allows you to recover the factory calibration constants. The ability to do this allows you to operate the power supply for troubleshooting and/or to recalibrate it as required. To restore the original factory calibration constants, proceed as follows: Turn off the supply and remove the top cover.
  • Page 48 Program to initialize EPROM or move factory preset data in 669xA power supplies. RE-STORE "INIT_669X" Rev A.00.00 dated Feb 2002 DIM Init_data(1:49),Model$[5],Idn$[21],Cal_data$[40] INTEGER Addr(1:49),Length(1:49) ASSIGN @Ps TO 705 ! Supply must be at address 705 CLEAR SCREEN 110 Eprom_data_addr: ! Data address DATA 2,6,10,14,18,19,20,24,28,32 DATA 36,37,38,42,46,50,54,55,56,57 DATA 64,68,72,76,80,116,152,153,154,155...
  • Page 49 CASE "6691A" RESTORE Eprom_data_6691 CASE "6692A" RESTORE Eprom_data_6692 CASE ELSE PRINT "Model number not found. Program is for models" PRINT "Keysight 6690A, 6691A, and 6692A only" STOP END SELECT FOR I=1 T0 49 ! Read model dependent data READ Init_data(I) NEXT I OUTPUT @Ps;"*CLS"...
  • Page 50 1090 Start: 1100 1110 INPUT "Select Initialization (I) or Factory preset replacement (F).",Sel$ 1120 CLEAR SCREEN 1130 SELECT (UPC$(Sel$)) 1140 CASE "I" ! Select Initialization 1150 GOTO Init_eeprom 1160 CASE "F" ! Select install new factory data 1170 GOTO Fact_preset 1180 CASE ELSE 1190...

  • Page 51: Disassembly Procedures

    1630 RESTORE Fact_cal_len 1640 FOR I=1 T0 9 1650 READ Cal_length(I) 1660 NEXT I 1670 1680 FOR I=1 T0 9 ! Locations of good data 1690 OUTPUT @Ps;"DIAG:EEPR? ";Cal_sour_addr(I);",";Cal_length(I) Read good data 1700 ENTER @Ps;Cal_data$ ! Enter good data 1710 OUTPUT @Ps;"DIAG:EEPR";Cal_dest_addr(I);",";Cal_length(I);",";Cal_data$ 1720 ! Write good data to factory preset locations...

  • Page 52: Tools Required

     Work at a static-free station such as a table covered with static-dissipative laminate or with a conductive table mat (Keysight P/N 9300-0797, or equivalent) using a conductive wrist strap where necessary, such as, Keysight P/N 9300-0969 or 9300-0970. Top Cover Remove the four screws that secure the carrying straps (two TORX 20 screws on each side).

  • Page 53: A4 Ac Input Assembly

    A4 AC Input Assembly To remove the A4 AC Input Board first remove the GPIB board, then disconnect these cables from the following connectors at the GPIB board: Disconnect the cables going to connector J417 and J420. Disconnect the cable going to connector J419. Remove the holding screw at the center of board just to the left of the 3-phase choke.

  • Page 54: Front Panel Assembly

    Front Panel Assembly Peel off vinyl trim (one strip on each side of front panel) to access the four screws that secure the front panel assembly to the chassis. Remove the four screws (two on each side) using a size T-10 TORX. Disconnect phone cable W5 from J6 on the A1 Front Panel Board.

  • Page 55: Output Bus Boards A7, A81 And A9 & Chassis Components

    Sinks described earlier. Once the heat sinks are removed you will have access to the A7, A8, and A9 boards as well as other chassis mounted components. Should you have any difficulty in removing power supply components or boards, contact the Keysight Technologies Support Line for help.
  • Page 56 Figure 3-15. 3-Inch Front Panel Frame Assembly Troubleshooting 53...
  • Page 57 Figure 3-16. Assembly A10, Exploded View 54 Troubleshooting...
  • Page 58 Figure 3-17. Assembly A10, Exploded View (6690A) Troubleshooting 55...
  • Page 59 Figure 3-18. Assembly A10, Exploded View (6691A, 6692A) 56 Troubleshooting...
  • Page 60 Figure 3-19. Three-Phase Line Choke Subchassis Wiring Troubleshooting 57...
  • Page 61 Figure 3-20. 24 Volt Fan Transformer 58 Troubleshooting...

  • Page 62: Principles Of Operation

    Principles of Operation Introduction Figure 4-3 (at the end of this chapter) is a block diagram showing the major circuits within the power supply. The power supply consists of the following circuits:  A1 Front Panel Board circuits.  A2 GPIB circuits. ...

  • Page 63: A1 Front Panel Assembly

    A digital control interface on the A2 GPIB Board provides the following power supply functions:  Relay link.  Digital 1/0.  Remote inhibit (INH).  Discrete fault indicator (FLT). An optical isolator IC (U113) isolates the FLT output signal common from the external fault circuit common. The desired digital interface function is selected by placing a jumper in a header (J106) on the A2 GPIB Board.
  • Page 64 The Secondary Microprocessor translates serial data received from the A2 board into parallel 12 bit data. The data bus is connected directly to the four DAC/OpAmp circuits. Under control of the lip the selected DAC converts the bus data into an analog signal.

  • Page 65: A4 Ac Input Board

    A low-level CV or CC signal is generated by the applicable status comparator (P/O U502) and returned to the secondary processor to indicate that the corresponding mode, CV or CC, is in effect. In CV mode, an OR gate diode (D652) conducts and the CV loop regulates the output voltage. A CV error amplifier (P/O U621) compares the programmed voltage signal CVPROG to VMON which is the output signal from the V_DIF amplifier(P/O U621).

  • Page 66: A5 Dc Rail Board

    A5 DC Rail Board The A5 DC Rail board contains the full-wave, three-phase, rectifiers and the input filter circuits. The ac mains are full-wave rectified by D420-D425 and converted to two, 300-volt dc rails by filter capacitors, C423-C426, and by two range select connectors.

  • Page 67: Output Circuits

    KEY PAD DISPLAY UPPER FRONT PANEL FRONT BOARD CONTROL BOARD PANEL ASSY CT/CC SWITCHING SECONDARY CONTROL INTERFACE CIRCUITS CONTROL GPIB GPIB BOARD CONTROLLER SERIAL LINK DIGITAL CONTROL Figure 4-3. Keysight Series 669xA Power Supply, Block Diagram 64 Principles Of Operation...

  • Page 68: Replaceable Parts

    A8 and A10 assemblies contain no user- replaceable parts. How to Order Parts You can order parts from your local Keysight Technologies Sales and Support Office (see the list of offices in the back of this manual). When ordering a part, please include the following information: ...
  • Page 69 Table 5-1. Main Chassis, Replaceable Parts (continued) ELECTRICAL PARTS C900-905 6690A 0180-4615 CAP 18000uF 28V 6691A 0180-4596 CAP 13000uF 45V 6692A 0181-0028 CAP 4700uF 80V C906 6690A 0180-4615 CAP 18000uF 28V C907 6690A 0180-4615 CAP 18000uF 28V 6691A 0180-4596 CAP 13000uF 45V 6692A 0181-0028 CAP 4700uF 80V...
  • Page 70 SKID ( shipping container ) 5080-2415 FOAM PAD ( shipping container ) 5964-8269 MANUAL-OPERATING Table 5-2. Front Panel Assembly, Replaceable Parts Ref. Desig. Keysight Part No. Description 5060-3542 A1 KEYPAD PC BOARD (tested) 0370-3238 KNOB Ref: G1, G2 0515-2535 SCREW - Ref: keypad PCB to front frame...
  • Page 71 Table 5-4. A3 FET Assembly, Replaceable Parts Ref. Desig. Keysight Part No. Description Q201-204, 211, 222, 233, 244 1855-1674 MOSFET 500V 20A (replace as matched set) Q301-304, 311, 322, 333, 344 1855-1674 MOSFET 500V 20A (replace as matched set) 5080-2279...

  • Page 72: Diagrams

    Diagrams Introduction This chapter contains drawings and diagrams for troubleshooting and maintaining Keysight Series 669xA Power Supplies. Unless otherwise specified, a drawing or diagram applies to all models of the series. Wiring connections to external equipment are shown in the Power Supply Operating Manual.
  • Page 73 Table 6-2. Signal Name Mnemonics Mnemonic Description Mnemonic Description A(0)--A(15) MSRQ Address lines Microprocessor service request AD (O)--AD(7) NDAC Address bus Not data accepted (GPIB) AMB_SENSE NEG_IMON Ambient temperature sense Negative current monitor ANA(0)--ANA(7) NRFD Analog Signal readback bus Not ready or data (GPIB) Attention (GPIB) Overvoltage BIAS_OK...
  • Page 74 Table 6-3. Test Points (continued) TEST POINT No. & Loc. Signal Tested Measurement and Conditions A4 AC Input Board Connect meter between TP 9 and 10, or 9 and 11, or 10 and 11, and measure approximately 220VAC or 440VAC. AC Mains Voltage J418-1/J417-7 AC Mains Voltage...
  • Page 75 Table 6-3. Test Points (continued) TEST POINT No. & Loc. Signal Tested Measurement and Conditions A10 Control Board Secondary common (Sheet 1) Connect meter or scope common here. Make +C500 measurements at test points 37 - 61, and 62 - 70. +10V ...
  • Page 76 Table 6-4. General Schematic Notes Schematic sheets are not intended for component-level troubleshooting. Component values and ratings do not match the values used on all models. All resistors are in ohms 1%, 1/8W, unless otherwise specified. All capacitors are in microfarads unless otherwise specified. Signal lines that are terminated by flags continue on other sheets, and may also go to other locations on the same sheet.
  • Page 77 Figure 6-1. Test Point Waveforms for Table 6-3 (sheet 2 of 2) 74 Diagrams...
  • Page 78 180-235 VAC A2 GPIB 5080-2168 FRONT PANEL J801 5182-9185 P101 J108 RANGE 1 ASSEMBLY J107 (W5) J417 J821 LINE 5182-9200 5080 (W4) CHOKE 5080-2280 J809 T418 2168 RANGE 2 A6 BIAS J507 5080-2283 J830 360-440 VAC ASSEMBLY J910 SLOW SENSE 5080-2316 J510 J509...
  • Page 79 Figure 6-3. A1 Front Panel Board, Assembly Diagram...
  • Page 80 Schematic sheets are not intended for component-level troubleshooting. Component values and ratings may not match the values used on all models. Figure 6-4. A1 Front Panel Board, Schematic Diagram...
  • Page 81 Figure 6-5. A2 GPIB Board, Component Location...
  • Page 82 Figure 6-6. A2 GPIB Board, Schematic Diagram...
  • Page 83 Figure 6-7. A3 FET Board, Component and Test Point Location...
  • Page 84 Schematic sheets are not intended for component-level troubleshooting. Component values and ratings may not match the values used on all models. Figure 6-8. A3 FET Board, Schematic Diagram (sheet 1 of 2)
  • Page 85 Schematic sheets are not intended for component-level troubleshooting. Component values and ratings may not match the values used on all models. Figure 6-8. A3 FET Board, Schematic Diagram (sheet 2 of 2)
  • Page 86 PHASE 2 PHASE 1 12_AWG_AMPIN 12_AWG_AMPIN TO AC INPUT RAIL E401 (GRA) E1942 E19411 9140-2548 SINGLE PHASE INPUT CHASSIS PHASE 1 PHASE 2 12_AWG_AMPIN 12_AWG_AMPIN TO AC INPUT E402 (WHT/GRA/BRN) E19132 E19413 CHASSIS PHASE 3 12_AWG_AMPIN PHASE 3 12_AWG_AMPIN TO AC INPUT E400 (WHT/GRA/RED) E19415 E19133 CHASSIS...
  • Page 87 Figure 6-11. A4 AC Input Board, Component and Test Point Location...
  • Page 88 J419 5 PIN TO BIAS PCB UTILITY 1251-6832 BIAS / FUSE LED CONNECTOR E400 TO J19133 WHT / RED / GRA K401 R407 E401 TO J19132 0699-3191 E402 R408 J417 TO J1942 WHT / BRN / GRA 0490-1908 0699-3191 12 PIN UTILITY RANGE 1 +24.5V...
  • Page 89 Figure 6-13. A5 DC Rail Board, Component and Test Point Location...
  • Page 90 L420 5080-2300 HS420 HS421 HS422 (COIL: 5080-2263 / SLUG: 9170-1575) J430 1205-0350 1205-0350 1205-0350 DC RAIL 1 2 PIN AC INPUT UTILITY ASSY: 5064-0070 ASSY: 5064-0070 ASSY: 5064-0070 1253-4842 E420 1252-1346 WHT / RED / GRA E421 RANGE 1 RANGE 2 1252-1346 E448 E450...
  • Page 91 Figure 6-15. A6 Bias Board, Component and Test Point Location...
  • Page 93 Figure 6-16. A6 Bias Board, Schematic Diagram (Sheet 2 of 2)
  • Page 94 Figure 6-17. Power Mesh, Schematic Diagram, All Models...
  • Page 95 Schematic sheets are not intended for component-level troubleshooting. Component values and ratings may not match the values used on all models. Figure 6-18. A7 Snubber Board, Component Location and Schematic Diagram Figure 6-19. A8 Fast Sense Board, Component Location and Schematic Diagram...
  • Page 96 Schematic sheets are not intended for component-level troubleshooting. Component values and ratings may not match the values used on all models. Figure 6-20. A9 Down Programming/Slow Sense, Component Location and Schematic Diagram...
  • Page 97 Figure 6-21. A10 Control Board, Component and Test Point Location...
  • Page 98 Figure 6-22. A10 Control Board, Schematic Diagram (Sheet 1 of 4)
  • Page 99 Figure 6-22. A10 Control Board, Schematic Diagram (Sheet 2 of 4)
  • Page 100 Figure 6-22. A10 Control Board, Schematic Diagram (Sheet 3 of 4)
  • Page 101 Figure 6-22. A10 Control Board, Schematic Diagram (Sheet 4 of 4)

  • Page 102: Backdating

    Look in the following table and locate your Keysight model. Then look at each serial number listed for this group. If the serial number of your power supply is prior to any of the serial number(s) listed, perform the change indicated in the Change column.

  • Page 104: Index

    Index E11 TEMP, 27 E12 DACS, 27 E2 FP ROM, 27 E3 EE CHKSM, 27 averaging E4 PRI XRAM, 27 constant current measurements, 19 E5 PRI IRAM, 27 E6 PRI ROM, 27 E7 GPIB, 27 E8 SEC RAM, 27 backdating, 99 E9 SEC ROM, 27 block diagram, 64 EE WRITE ERR, 27...
  • Page 105 dc rail board, 63 SERIAL TIMOUT, 27 signal names, 70 FET board, 63 front panel, 60 SUBF OVERRUN, 27 GPIB board, 59 H bridge, 63 input board, 62 output circuits, 64 test equipment principles of, 59 troubleshooting, 25 test header, 42 test points, 70 waveforms, 73 performance...
  • Page 106 This information is subject to change without notice. © Keysight Technologies 2002, 2014 Edition 2, December 2014 5969-2907 www.keysight.com Backdating 103...

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