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Keysight Technologies 668 A Series Service Manual
Keysight Technologies 668 A Series Service Manual

Keysight Technologies 668 A Series Service Manual

Gpib dc power supplies

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HP 5181-2813
LCD Display for the 6681A Single-Output 5000 W
DC Power Supply
A l l t r a d e m a r k s , b r a n d n a m e s , a n d b r a n d s a p p e a r i n g h e r e i n a r e t h e p r o p e r t y o f t h e i r r e s p e c t i v e o w n e r s .
• C r i t i c a l a n d e x p e d i t e d s e r v i c e s
• I n s t o c k / R e a d y - t o - s h i p
Artisan Scientific Corporation dba Artisan Technology Group is not an affiliate, representative, or authorized distributor for any manufacturer listed herein.
Limited Availability
Used and in Excellent Condition
Open Web Page
https://www.artisantg.com/91112-19
• We b u y y o u r e x c e s s , u n d e r u t i l i z e d , a n d i d l e e q u i p me n t
• F u l l - s e r v i c e , i n d e p e n d e n t r e p a i r c e n t e r

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Summary of Contents for Keysight Technologies 668 A Series

  • Page 1 HP 5181-2813 LCD Display for the 6681A Single-Output 5000 W DC Power Supply Limited Availability Used and in Excellent Condition Open Web Page https://www.artisantg.com/91112-19 A l l t r a d e m a r k s , b r a n d n a m e s , a n d b r a n d s a p p e a r i n g h e r e i n a r e t h e p r o p e r t y o f t h e i r r e s p e c t i v e o w n e r s . •...
  • Page 2 Keysight Series 668xA GPIB DC Power Supplies Service Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 3 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 4: Limitation Of Warranty

    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 5: Safety Considerations

    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 6: Safety Symbol Definitions

    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 7: Table Of Contents

    Table of Contents Introduction .................................... 7 Scope....................................7 Organization..................................7 Instrument Identification..............................7 Related Documents ................................8 Change Sheet................................. 8 Operating Manual................................8 Manual Revisions................................8 Firmware Revisions ................................. 8 Safety Considerations ................................. 9 Conventions ..................................9 Electrostatic Discharge ............................... 9 Verification....................................
  • Page 8 Post-Repair Calibration..............................62 When Required ................................62 Inhibit Calibration Jumper ............................. 62 Calibration Password ..............................62 Restoring Factory Calibration Constants ........................62 EEPROM Initialization ..............................63 Transferring Calibration Constants To Factory Preset Locations ..................63 Disassembly Procedures ..............................68 Tools Required ................................68 Top Cover ..................................
  • Page 9: 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 10: Related Documents

    Related Documents Change Sheet There may or may not be a Manual Change sheet included with this manual (see Manual Revisions). If one is included, be sure to examine it for changes to this manual. Operating Manual Each power supply is shipped with an operating manual (see Replaceable Parts, Chapter 5 for part numbers) that covers the following topics: ...
  • Page 11: Safety Considerations

    Safety Considerations This power supply is a Safety Class I instrument, which means it has a protective earth terminal. This terminal must be connected to earth ground through a power source equipped with a 4-wire, ground receptacle. Refer to the "Safety Summary"...
  • Page 12 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 13: Verification

    Verification Introduction This chapter provides test procedures for checking the operation of Keysight Series 668xA 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. Tests Two types of procedures are provided: Operation Verification tests and Performance tests.
  • Page 14: Electronic Load

    Table 2-1. Test Equipment Required Type Required Characteristics Recommended Model Resolution: 10 nV @ 1V Keysight 3458A Digital Voltmeter Readout: 8 1/2 digits Accuracy: 20 ppm Keysight 6682A, 6683A, Keysight Guildline 9230/300 Current Monitor Resistor 6684A: 0.001  0.04%, 300A, 100W Keysight 6680A, 6681A Burster Type 1280 100 ...
  • Page 15: Programming The Tests

    Programming The Tests General Considerations Procedures are given for programming these tests either from the front panel keypad or from a GPIB controller. The procedures assume you know how to use the front panel keypad or how to program over the GPIB (see the Power Supply Operating Manual for more information).
  • Page 16: Operation Verification Tests

    Operation Verification Tests Table 2-3 lists the requirements for operation verification, which is a subset of the performance tests. Table 2-3. Operation Verification Tests Test Refer To Turn-On Checkout Power Supply Operating Manual Voltage Programming and Readback Accuracy Table 2-4 Current Programming and Readback Accuracy Table 2-5 Note: Record the results of Tests 2 and 3 in the appropriate Performance Test Record sheets...
  • Page 17 Figure 2-1. Constant Voltage (CV) Test Setup Verification 15 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 18 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 19 Table 2-4. Constant Voltage (CV) Tests (continued) Action Normal Result CV Source Effect (cont) Set the transformer to the nominal ac line voltage. Connect the DVM across +S and -S (see Fig. 2-1). Turn on the power supply and program the current to its maximum programmable value and the voltage to its full-scale value (see Table 2-2).
  • Page 20 Table 2-4. Constant Voltage (CV) Tests (continued) Action Normal Result Transient Recovery Time This test measures the time required for the output voltage to return to within 100mV of its final value following a 50% change in output load current. Measurements are made on both the unloading transient (from full load to 1/2 load) and the loading transient (from 1/2 load to full load).
  • Page 21: Constant Current (Cc) Tests

    Constant Current (CC) Tests Test Setup Connect the appropriate current monitoring resistor (see Table 2-l) as shown in Fig. 2-3. The accuracy of the resistor must be as specified in the table. Test Procedures The test procedures are given in Table 2-5. The tests are independent and may be performed in any order. The CC tests are: ...
  • Page 22 Table 2-5. Constant Current (CC) Tests (continued) Action Normal Result CC Load Effect This test measures the change in output current resulting from a change in load from full-load voltage to a short circuit. It is recommended that you use averaged readings for Steps 5 and 6 of this test (see Averaging AC Measurements at the end of this chapter).
  • Page 23 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 24 Figure 2-3. CC Load Effect Test Setup 22 Verification Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 25: Averaging The Cc Measurements

    Averaging the CC Measurements The CC Load Effect and CC Source Effect tests measure the dc regulation of the power supply's output current. When doing these tests, you must be sure that the readings taken are truly dc regulation values and not instantaneous ac peaks of the output current ripple.
  • Page 26 Table 2-6. Performance Test Record Form Test Facility: __________________________________________ Report No.__________________________________________ __________________________________________ Date______________________________________________ __________________________________________ Customer___________________________________________ __________________________________________ Tested By___________________________________________ Model_____________________________________ Ambient Temperature (C)______________________________ Serial No.__________________________________ Relative Humidity (%)_________________________________ Options ____________________________________ Nominal Line Frequency (Hz)___________________________ Firmware Revision ___________________________ Special Notes: ____________________________________________________________________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________ ____________________________________________________________________________________________...
  • Page 27 Table 2-7. Performance Test Record for Keysight Model 6680A MODEL Keysight _____________ Report No.______________ Date_____________________ Test Description Minimum Results Maximum Spec. Spec. Constant Voltage Tests Voltage Programming and Readback Low Voltage (0V) V -5mV ________mV +5mV Front Panel Display Readback - 7.5mV ________mV + 7.5mV...
  • Page 28 Table 2-7. Performance Test Record for Keysight Model 6681A MODEL Keysight_____________ Report No.______________ Date_____________________ Test Description Minimum Results Maximum Spec. Spec. Constant Voltage Tests Voltage Programming and Readback Low Voltage (0V) V -8mV ________mV +8mV Front Panel Display Readback - 12mV ________mV + 12mV High Voltage (8V) V...
  • Page 29 Table 2-7. Performance Test Record for Keysight Model 6682A MODEL Keysight_____________ Report No.______________ Date_____________________ Test Description Minimum Results Maximum Spec. Spec. Constant Voltage Tests Voltage Programming and Readback Low Voltage (0V) V -21mV ________mV +21mV Front Panel Display Readback - 32mV ________mV + 32mV High Voltage (21V) V...
  • Page 30 Table 2-7. Performance Test Record for Keysight Model 6683A MODEL Keysight_____________ Report No.______________ Date_____________________ Test Description Minimum Results Maximum Spec. Spec. Constant Voltage Tests Voltage Programming and Readback Low Voltage (0V) V -32mV ________mV +32mV Front Panel Display Readback - 48mV ________mV + 48mV High Voltage (32V) V...
  • Page 31 Table 2-7. Performance Test Record for Keysight Model 6684A MODEL Keysight_____________ Report No.______________ Date_____________________ Test Description Minimum Results Maximum Spec. Spec. Constant Voltage Tests Voltage Programming and Readback Low Voltage (0V) V -40mV ________mV +40mV Front Panel Display Readback - 60mV ________mV + 60mV High Voltage (40V) V...
  • Page 32 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 33: Troubleshooting

    Troubleshooting Shock Hazard: Most of the procedures in this chapter must be performed with power applied and protective covers removed. These procedures should be done only by trained service personnel aware of the hazard from electrical shock. This instrument uses components that can be damaged or suffer serious performance degradation due to ESD (electrostatic discharge).
  • Page 34: Test Equipment Required

    Test Equipment Required Table 3-1. Test Equipment Required Equipment Purpose Recommended Model Logic Probe To check states of data lines. Keysight 545A Test Clips To gain access to IC pins. AP Products No. LTC Ammeter/Current Shunt To measure output current. Keysight 6680A &...
  • Page 35 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). Microprocessor AlU3 E2 FP ROM Front panel ROM test failed (power-on ROM AlU4 or address latches AlU8 and *TST?).
  • Page 36: Troubleshooting Charts

    Troubleshooting Charts Figure 3-1 gives overall troubleshooting procedures to isolate the fault to a circuit board or particular circuit (see Figure 3-20 for the location of the circuit boards). These procedures include the use of power-on selftest (Table 3-2) and signature analysis techniques (Table 3-5 through Table 3-7).
  • Page 37 Figure 3-1. Overall Troubleshooting (Sheet 1 of 4) Troubleshooting 35 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 38 Figure 3-1. Overall Troubleshooting (Sheet 2 of 4) 36 Troubleshooting Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 39 Figure 3-1. Overall Troubleshooting (Sheet 3 of 4) Troubleshooting 37 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 40 Figure 3-1. Overall Troubleshooting (Sheet 4 of 4) 38 Troubleshooting Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 41 Figure 3-2. No Display Troubleshooting Troubleshooting 39 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 42 Figure 3-3. OV Will Not Fire Troubleshooting 40 Troubleshooting Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 43 Figure 3-4. OV At Turn-On Troubleshooting Troubleshooting 41 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 44 Figure 3-5. Output Held Low Troubleshooting (Sheet 1 of 2) 42 Troubleshooting Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 45 Figure 3-5. Output Held Low Troubleshooting (Sheet 2 of 2) Troubleshooting 43 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 46 Figure 3-6. Output Held High Troubleshooting 44 Troubleshooting Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 47 Figure 3-7. DAC Circuits Troubleshooting Troubleshooting 45 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 48 Figure 3-8. DAC Test Waveforms 46 Troubleshooting Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 49 Figure 3-9. CV/CC DAC and Amplifier Circuit Troubleshooting Troubleshooting 47 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 50 Figure 3-10. Serial Down Troubleshooting (Sheet 1 of 2) 48 Troubleshooting Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 51 Figure 3-10. Serial Down Troubleshooting (Sheet 2 of 2) Troubleshooting 49 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 52 Figure 3-11. Secondary Interface Down (Sheet 1 of 2) 50 Troubleshooting Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 53 Figure 3-11. Secondary Interface Down (Sheet 2 of 2) Troubleshooting 51 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 54 Figure 3-12. Slow Downprogramming Troubleshooting 52 Troubleshooting Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 55: Cv/Cc Status Annunciators Troubleshooting

    CV/CC Status Annunciators Troubleshooting When troubleshooting the CV/CC status annunciators or status readback circuits, first measure the voltage drop across the gating diodes, which are Al0D651 for the CC circuit and Al0D652 for the CV circuit (see A10, Sheet 2). A conducting diode indicates an active (ON) control circuit.
  • Page 56 Table 3-4. FET Troubleshooting Chart (continued) Procedure Result Dynamic Troubleshooting Turn off the power supply and remove the A3 FET Board with its heat sink See "Disassembly Procedures" assembly. Short the collectors of Q251 and Q253 or Q351 and Q353 by connecting the collector (case) of each transistor to common ( E507) .
  • Page 57 Figure 3-13. A3 FET Board Test Waveforms Troubleshooting 55 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 58: Signature Analysis

    For a typical Model 6681A, the controller will return a string with four comma-separated fields, as follows: "Keysight Technologies ,6681A,O,fA.01.05sA.01.04pA.0l.02" The first three fields in the string are the manufacturer, model number and 0. The last field gives the firmware information as follows: f= front panel firmware revision (A.01.05).
  • Page 59: Test Headers

    Test Headers The power supply has two test headers as shown in Figure 3-15, each with a jumper that can be moved to different positions for SA testing and for other functions. To gain access to the headers, remove the power supply top cover. Pins Description Primary Interface Test Connector A2J106 (Systems Supplies Only)
  • Page 60 Table 3-5. Primary Interface SA Test Description: These signatures check some primary interface circuits on the Systems Supply A2 GPIB Board. Valid A2U106 ROM Firmware Revision: A.01.06 Test Setup: See Figure 3-17. Turn off the power supply and remove the top cover. Connect SA jumper of connector J106 on A2 GPIB Board (see Figure 3-15).
  • Page 61 Figure 3-16. Signature Analysis Connections, (Sheet 1 of 2) Troubleshooting 59 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 62 Figure 3-16. Signature Analysis Connections, (Sheet 2 of 2) Table 3-6. Front Panel SA Test Description: These signatures check front panel microprocessor AlU3. Valid A1U4 ROM Firmware Revision: A.01.07 Test Setup: See Figure 3-17. .Turn off the power supply and remove the top cover. To gain access to A1 Front Panel Board, perform steps 1 and 2 of the disassembly procedure for A1 Front Panel Assembly (see "Disassembly Procedures").
  • Page 63 Table 3-7. Secondary Interface SA Test Description: These signatures check the secondary microprocessor A5U504. Valid A5U504 ROM Firmware Revision: A.01.04 Test Setup: See Figure 3-17. Turn off the power supply and remove the top cover. To obtain a setup that allows access to components and test points on the A5 Control Board, follow the procedure given in Table 3-3 under "A5 Control Board Setup".
  • Page 64: Post-Repair Calibration

    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 65: Eeprom Initialization

    EEPROM Initialization EEPROM AlU6 on the A1 Front Panel Board stores the supply's GPIB address, model number, and constants required to program and calibrate the power supply. If either the front panel board or the EEPROM is replaced, the power supply must be reinitialized with the proper constants by running the program listed in Figure 3-18.
  • Page 66 ! Program to initialize EPROM or move factory preset data in 668xA power supplies. RE-STORE "INIT_668X" Rev A.00.00 dated 09 Nov 1993 DIM Init_data(1:49),Model$[5],Idn$[21],Cal_data$[40] INTEGER Addr(1:49),Length(1:49) ASSIGN @Ps TO 705 ! Supply must be at address 705 CLEAR SCREEN 110 Eprom_data_addr: ! Data address DATA 2,6,10,14,18,19,20,24,28,32 DATA 36,37,38,42,46,50,54,55,56,57...
  • Page 67 DATA 115,30,20,1,127,.002701,.2,.00042,10.25 530 Eprom_data_6684: ! EEPROM data for 6684A DATA 93,74,41,0,83,0,29,70,131,0 DATA 98,21,4.6,10,50,0,83,255,20,10 DATA 6684,87,97,28,93,128,5,255,0,0 DATA 1296,6684,0,20,180,20,180,175,33,98 DATA 115,30,20,1,127,.002701,.2,.000333,10.234375 INPUT "Input Power Supply model number. Example:""6681A""",Model$ CLEAR SCREEN RESTORE Eprom_data_addr FOR I=1 T0 49 READ Addr(I) NEXT I RESTORE Eprom_data_len FOR I=1 T0 49 READ Length(I) NEXT I...
  • Page 68 1020 GOSUB Ps_error ! Error if passcode is not "0"! 1030 IF Err THEN 1040 OUTPUT @Ps;"*IDN?" ! Get data from model # location 1050 ENTER @Ps;Idn$ 1060 Model=VAL(Idn$[POS(Idn$,",")+1] ) 1070 ELSE 1080 GOTO Start 1090 END IF 1100 1110 OUTPUT @Ps;"CAL:STATE ON,";Model ! Turn on cal mode, passcode = 1120...
  • Page 69 1530 CLEAR SCREEN 1540 PRINT "This program should ONLY be completed if your power supply" 1550 PRINT "EEPROM has been replaced or a component that will effect" 1560 PRINT "the calibration AND the alignment of voltage, overvoltage" 1570 PRINT "and current is complete AND unit has passed the performance" 1580 PRINT "test.
  • Page 70: Disassembly Procedures

    2010 IF Err THEN 2020 PRINT "An error occurred during the EEPROM read/write, Check for" 2030 PRINT "programming errors. Initialization data may be incorrect." 2040 STOP 2050 END IF 2060 2070 PRINT "Operation complete. Program stopped." 2080 STOP 2090 2100 Ps_error: ! Error handling subroutine 2110 OUTPUT @Ps;"SYST:ERR?"...
  • Page 71: Top Cover

    Top Cover Remove the four screws that secure the carrying straps (two TORX 20 screws on each side). These same screws secure the cover to the chassis. Spread the bottom rear of the cover, and then pull the cover backwards towards the rear of the power supply to disengage it from the front panel.
  • Page 72: 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 three (3) fuse assemblies inside rear of power supply to free the wires going to E400, E401, and E402 on the AC Input Board.
  • Page 73: A10 Control Assembly

    A10 Control Assembly Disconnect the cables from the following connectors at the A10 DC RAIL board: Disconnect the ribbon cable going from to the A6 Bias board. This cable connects to J509 on the A10 board but it is easier to disconnect it at the A6 Bias Board. Disconnect cables from connector J507 (phone) and connectors J510, J511, J512, and J513 on the A10 Control Board.
  • Page 74: A1Dsp1 Lcd Display

    A1DSP1 LCD Display Remove the A1 Front Panel Board as described in that procedure. Remove the nuts securing the LCD display to the front panel assembly and remove the LCD and attached ribbon cable (see CAUTION below). (When reinstalling this cable, be sure to line up the cable stripe over the LCD connector pin marked with a square.) The display connector is fragile.
  • Page 75 Figure 3-18. Component Locations (Top Cover and RFI Shield Removed) Troubleshooting 73 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 76 Figure 3-19. 5-Inch Front Panel Frame Assembly 74 Troubleshooting Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 77 Figure 3-20. 3-Inch Front Panel Frame Assembly Troubleshooting 75 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 78 Figure 3-21. Assembly A10, Exploded View 76 Troubleshooting Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 79 Figure 3-22. Assembly A10, Exploded View (6680A, 6681A) Troubleshooting 77 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 80 Figure 3-23. Assembly A10, Exploded View (6682A, 6683A, 6684A) 78 Troubleshooting Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 81 Figure 3-24. Three-Phase Line Choke Subchassis Wiring Troubleshooting 79 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 82 Figure 3-25. 24 Volt Fan Transformer 80 Troubleshooting Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 83: 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 ckts.  A2 GPIB ckts. ...
  • Page 84: 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 85 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 86 any value of load impedance. Switching between CV and CC is done automatically by the CV/CC control circuits at a value of load impedance equal to the ratio of the programmed voltage value to the programmed current value. 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.
  • Page 87: A4 Ac Input Board

    A4 AC Input Board The A4 Input Board contains the Inrush-Current Limit relay (K401), Main Power Relay (K402), and current-limiting resistors (R407, R408). On power-on, the current-limit relay (K401) closes allowing the dc rail capacitors to charge under a controlled condition. This applies ac voltage to the A6 Bias Board. After the turn-on initialization period (approximately 10 seconds), the main relay (K402) closes, shorting out the current-limit resistor.
  • Page 88: Output Circuits

    Figure 4-2. 1ST Stage of the FET H-Bridge Configuration Output Circuits The output circuits include the following circuits:  Chassis mounted components.  Two power transformers, T900/T901.  Two inductors, L900/L901.  Four rectifiers, D900 through D903.  Output capacitors. ...
  • Page 89 Figure 4-3. Keysight Series 668xA Power Supply, Block Diagram Principles Of Operation 87 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 90 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 91: Replaceable Parts

    Replaceable Parts INTRODUCTION Chapter Organization This section lists the replaceable electrical and mechanical parts for the Keysight 668xA series power supplies. (Component location diagrams are located in Chapter 6.) The lists consist of tables organized by assemblies as follows: Assembly Main chassis * Table 5-3 A1 Front Panel EBoard...
  • Page 92: How To Order 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:  the Keysight part number ...
  • Page 93 Table 5-3. Main Chassis, Replaceable Parts Ref. Desig. Keysight Part No. Description C907 6680A 0180-4516 CAP 33000uF 7.5V 6681A 0180-4532 CAP 22000uF 16V 6682A 0180-4615 CAP 18000uF 28V 6683A 0180-4596 CAP 13000uF 45V 6684A 0180-4597 CAP 7.200uF 55V C920, 921,922,923,924,925 6682A, 6683A, 6684A 0160-4183 CAP 1000pF 250V...
  • Page 94 Table 5-3. Main Chassis, Replaceable Parts (continued) Ref. Desig. Keysight Part No. Description 2110-0910 FUSE (see 5060-3513 ) 2110-0911 FUSE (see 5060-3512 ) 3160-0419 FAN FINGER GUARD 3160-0571 FAN-TUBEAXIAL 5001-0538 TRIM-SIDES 5001-0539 TRIM SIDES,FRENCH GRAY 5001-6776 CHASSIS, BASE 5001-6778 PANEL, REAR 5001-6779 COVER-OUTSIDE 5001-6780...
  • Page 95 Table 5-3. Main Chassis, Replaceable Parts (continued) Ref. Desig. Keysight Part No. Description 1400-0611 CABLE CLAMP (GPIB/FAN) 5080-2299 LABEL REAR PANEL 5080-2413 CRATE ( shipping container ) 5080-2414 SKID ( shipping container ) 5080-2415 FOAM PAD ( shipping container ) 5080-2314 EDGE PROTECTOR 12 inches ( shipping container ) 5080-2315...
  • Page 96 Table 5-4. A1 Front Panel Board, Replaceable Parts (continued) Ref. Desig. Keysight Part No. Description 3101-3088 Line switch VR16 1902-0950 Diode Zener 4.7V 5 1820-6721 IC MPU 5080-2466 ROM programmed front panel 1818-4792 IC memory 1820-2724 IC SN74ALS573BN 1258-0209 Jumper (J3) 0811-3590 Jumper 0410-2159...
  • Page 97 Table 5-6. A2 GPIB Board, Replaceable Parts (see Note) Ref. Desig. Keysight Part No. Description ELECTRICAL PARTS C122 0180-4606 Capacitor 10,000F C128 0160-4281 Capacitor 2,200pF F101 2110-0699 Fuse Subminature 5AM J101 1252-2320 Connector Receptacle (GPIB) J106 1251-4926 Connector Receptacle (Test Header) J107, 108, 114, 115 1251-7330 Connector Receptacle...
  • Page 98 Table 5-7. A3 FET Assembly, Replaceable Parts (continued) Ref. Desig. Keysight Part No. Description C244, 245 0160-6806 CAP .luF 400V C248 0160-4832 CAP .0luF 10% C258 0180-4132 CAP 6.8uF 35V C301 0160-7505 7uF+ - 5% 200V C302 0180-4132 CAP 6.8uF 35V C303 0160-4835 CAP .luF 10% 50V...
  • Page 99 Table 5-7. A3 FET Assembly, Replaceable Parts (continued) Ref. Desig. Keysight Part No. Description Q301, 302, 303, 304 1855-0859 MOSFET 500V 20A Q311, 322, 333, 344 1855-0859 MOSFET 500V 20A Q351, 352, 353, 354 1853-0363 D45H5/D45H8/363 R201 0811-3903 RES 150 Ohm 5W NI R202 0699-0208 RES 1 5% .25W CF...
  • Page 100 Table 5-7. A3 FET Assembly, Replaceable Parts (continued) Ref. Desig. Keysight Part No. Description R271 0757-0200 RES 5.62K 1% R272 0757-0442 RES l0K 1% .125W R273, 274, 275 0757-0437 RES 4.75K 1% R277 0698-3633 RES 3905% 2W MO R301 0811-3903 RES 150Ohm 5W NI R302 0699-0208...
  • Page 101 Table 5-7. A3 FET Assembly, Replaceable Parts (continued) Ref. Desig. Keysight Part No. Description R383 0757-0442 RES 10K 1% .125W R384, 385 8159-0005 RES-ZERO OHMS T202 9100-4350 XFMR-CURRENT T204 06624-80091 XFMR-PULSE T205 5080-2238 XFMR-CUR SHARING T302 9100-4350 XFMR-CURRENT T304 06624-80091 XFMR-PULSE U201, 202 1820-8433...
  • Page 102 Table 5-9. A5 DC Rail Assembly, Replaceable Parts Ref. Desig. Keysight Part No. Description ELECTRICAL PARTS C418 0160-4048 CAP 0.022uF 20% C420, 421, 422 0160-7606 CAP luF 275V C427 0160-7743 C-F .047uF 380V D420, 421, 422, 424, 425 5060-3516 ASSY.-RECTIFIER DS420, 421 1990-0517 F420...
  • Page 103 Table 5-10. A6 Bias Assembly, Replaceable Parts (continued) Ref. Desig. Keysight Part No. Description C823 0180-4131 CAP 4.7uF 35V C824, 825 0180-3298 C-F 2200uF 50V C826 0160-4834 CAP .047uF 10% C827 0180-3587 CAP 1000uF 50V C828 0180-0230 C-F luF 50V C829, 830, 831 0180-4129 CAP luF 35V...
  • Page 104 Table 5-10. A6 Bias Assembly, Replaceable Parts (continued) Ref. Desig. Keysight Part No. Description R841 0698-6363 RES 40K .1% R842 0698-6360 RES 10K .1% R843 0757-0472 RES 200K 1% R844 0698-6977 RES 30K .1% .125 R845, 847 0698-6360 RES 10K .1% R848 0698-6977 RES 30K .1% .125...
  • Page 105 Table 5-11. A7 Snubber Assembly, Replaceable Parts Ref. Desig. Keysight Part No. Description ELECTRICAL PARTS C910, 911, 912, 913 6680A, 6681A 0160-0162 CAP .022uF 10% 6682A 0160-6896 CAP .015uF 10% 6683A 0160-4845 CAP 6800pF 10% 6684A 0160-6162 CAP 4700pF 10% R910, 911, 912, 913 6680A, 6681A 0698-3601...
  • Page 106 Table 5-13. A9 Down Programmer/Slow Sense, Replaceable Parts Ref. Desig. Keysight Part No. Description ELECTRICAL PARTS C950, 951 0160-4259 CAP .22uF 10% C952, 953 0160-4048 CAP .022uF 20% C956, 957 0160-4065 CAP .luF 20% C958, 980 0160-4835 CAP .luF 10% 50V D980, 981 1901-1098 DIO-IN4150...
  • Page 107 Table 5-14. A10 Control Assembly, Replaceable Parts Ref. Desig. Keysight Part No. Description ELECTRICAL PARTS C500, 501, 502 0180-4129 CAP luF 35V C503 0160-4835 CAP .luF 10% 50V C504 0180-4129 CAP luF 35V C505 0180-4131 CAP 4.7uF 35V C506 0160-4835 CAP .luF 10% 50V C507 0180-4136...
  • Page 108 Table 5-14. A10 Control Assembly, Replaceable Parts (continued) Ref. Desig. Keysight Part No. Description C588 0160-4799 CAP 2.2pF 5% C589, 590 6680A, 6681A not used 6682A, 6683A, 6684A 0160-4824 CAP 680pF 5% C591 6680A 0160-4814 CAP 150pF 5% 6681A 0160-4801 CAP l00pF 5% 6682A, 683A, 6684A 0160-4813...
  • Page 109 Table 5-14. A10 Control Assembly, Replaceable Parts (continued) Ref. Desig. Keysight Part No. Description C639 0160-4795 CAP 4.7pF C640 0160-4835 CAP .luF 10% 50V C641 0160-5410 CAP 3300pF 5% C645 0160-4805 CAP 47pF 5% l00V C648 0160-4831 CAP 4700pF 10% C650 0160-4833 CAP .022uF 10%...
  • Page 110 Table 5-14. A10 Control Assembly, Replaceable Parts (continued) Ref. Desig. Keysight Part No. Description R506 0757-0289 RES 13.3K 1% R507 0698-3155 RES 4.64K 1% R508 0698-6323 RES 100.1% R509 0757-0442 RES 10K 1% .125W R510 0757-0289 RES 13.3K 1% R511 0698-3155 RES 4.64K 1% R512...
  • Page 111 Table 5-14. A10 Control Assembly, Replaceable Parts (continued) Ref. Desig. Keysight Part No. Description R570, 580 0757-0424 RES l.lK 1% R581 0757-0407 RES 200 1% .125W R582, 583 0698-4486 RES 24.9K 1% R584 0757-0472 RES 200K 1% R585 0757-0434 RES 3.65K 1% R586 0757-0472 RES 200K 1%...
  • Page 112 Table 5-14. A10 Control Assembly, Replaceable Parts (continued) Ref. Desig. Keysight Part No. Description R624 0757-0453 RES 30.1K 1% R625 6680A, 6681A 0698-3455 RES 261K 1% 6682A 0757-0461 RES 68.1K 1% 6683A, 6684A 0699-1972 RES 1.74M 1% R626 6680A, 6681A 0698-3455 RES 261K 1% 6682A...
  • Page 113 Table 5-14. A10 Control Assembly, Replaceable Parts (continued) Ref. Desig. Keysight Part No. Description R666 6680A 0698-8913 RES 1.5M 1% 6681A, 6682A 0683-2255 RES 2.2M 1% 6683A 0683-4755 RES 4.7M 1% 6684A 0683-5655 RES 5.6M 1% R667 6680A 0757-0465 RES l00K 1 6681A 0757-0462 RES 75K 1%...
  • Page 114 Table 5-14. A10 Control Assembly, Replaceable Parts (continued) Ref. Desig. Keysight Part No. Description R684 6680A 0757-0280 RES lK 1% 6681A 0757-0289 RES lK 1% 6682A 0757-0430 RES 2.21K 1% 6683A 0698-3496 RES 3.57K 1% 6684A 0757-0436 RES 4.32K 1% R685 6680A 0757-0280...
  • Page 115 Table 5-14. A10 Control Assembly, Replaceable Parts (continued) Ref. Desig. Keysight Part No. Description R709 6680A 0757-0468 RES 130K 6681A, 6682A 0757-0464 RES 90.9K 6683A, 6684A 0757-0464 RES 90.9K R710 6680A 0698-5091 RES 45K 6681A, 6682A 0698-3160 RES 31.6K 6683A, 6684A 0698-3160 RES 31.6K R711...
  • Page 116 Table 5-14. A10 Control Assembly, Replaceable Parts (continued) Ref. Desig. Keysight Part No. Description U506 5080-2305 PRGMD-IC, SEC U507 1820-3079 IC MC74HC138N U510, 511, 512 1826-2187 IC-CONVERTER,DIA U513, 514, 515 1826-1896 IC-LINEAR U516, 517 1826-1370 IC 365 U518 1820-3081 IC MC74HC74N U520 1826-1231 DIA 8-DGT...
  • Page 117: Diagrams

    Diagrams Introduction This chapter contains drawings and diagrams for troubleshooting and maintaining Keysight Series 668xA 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. Chapter Organization Table 6-1 summarizes the contents of this chapter.
  • Page 118 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 119 Table 6-3. Test Points TEST POINT No. & Loc. Signal Tested Measurement and Conditions A2 GPIB BOARD Primary/chassis ground Connect meter or scope common here. Then J106-4 make measurements at test points through + 5V primary bias + 5V + 0.2V U101- 1 PCLR Goes high for approximately 40 ms at power on,...
  • Page 120 Table 6-3. Test Points (continued) TEST POINT No. & Loc. Signal Tested Measurement and Conditions Bias Board (continued) PREF +2.5V U308-1 RESET* Held low for approximately 50 ms at power-on, U308-5 then goes high. FAN DETECT U311-7 -25V D317 FAN_PWN +0.6V U311-2 A3 FET Board...
  • Page 121: General Schematic Notes

    Table 6-3. Test Points (continued) TEST POINT No. & Loc. Signal Tested Measurement and Conditions A10 Control Board (continued) DIVIDER CLOCK (Sheet 3) See Figure 6-1 U600-10 DIVIDER RESET (Sheet 3) See Figure 6-1 U601-6 ON LATCH CLOCK (Sheet 3) See Figure 6-1 U601-3 ON LATCH (Sheet 3)
  • Page 122 Figure 6-1. Test Point Waveforms for Table 6-3 120 Diagrams Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 123 Figure 6-2. Circuit Board Cabling Diagram Diagrams 121 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 124 Figure 6-3. A1 Front Panel Board, Component and Test Point Location 122 Diagrams Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 125 Figure 6-4. A1 Front Panel Board, Schematic Diagram Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 126 NOTE: This LED Board is only used on earlier version Keysight 668xA models. Refer to Appendix A Backdating, change 10 for more information. Figure 6-5. LED Board, Component and Test Point Location Figure 6-6. LED Board, Schematic Diagram Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 127 Figure 6-7. A2 GPIB Board, Component Location Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 128 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 129 Figure 6-9. A3 FET Board, Component and Test Point Location Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 130 Figure 6-10. A3 FET Board, Schematic Diagram (sheet 1 of 2) Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 131 Figure 6-10. A3 FET Board, Schematic Diagram (sheet 2 of 2) Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 132 Figure 6-11. A4 AC Input Board, Component and Test Point Location Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 133 Figure 6-12. A4 AC Input Board, Schematic Diagram Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 134 Figure 6-13. A5 DC Rail Board, Component and Test Point Location Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 135 Figure 6-14. A5 DC Rail Board, Schematic Diagram Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 136 Figure 6-15. A6 Bias Board, Component and Test Point Location Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 137 Figure 6-16. A6 Bias Board, Schematic Diagram (Sheet 1of 2) Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 138 Figure 6-16. A6 Bias Board, Schematic Diagram (Sheet 2 of 2) Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 139 Figure 6-17. Power Mesh, Schematic Diagram, Models 6680A, 6681A Only Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 140 Figure 6-18. Power Mesh, Schematic Diagram Models 6682A, 6683A, 6684A Only Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 141 Figure 6-19. A7 Snubber Board, Component Location Figure 6-20. A7 Snubber Board, Schematic Diagram Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 142 Figure 6-22. A8 Fast Sense Board, Schematic Diagram Figure 6-21. A8 Fast Sense Board, Component Location Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 143 Figure 6-23. A9 Down Programming/Slow Sense, Component Location Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 144 Figure 6-24. A9 Down Programming/Slow Sense, Schematic Diagram Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 145 Figur e 6-25. A10 Contr ol Board, Compone nt and Test Point Loc ation Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 146 Figure 6-26. A10 Control Board, Schematic Diagram (Sheet 1 of 4) Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 147 Figure 6-26. A10 Control Board, Schematic Diagram (Sheet 2 of 4) Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 148 Figure 6-26. A10 Control Board, Schematic Diagram (Sheet 3 of 4) Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 149 Figure 6-26. A10 Control Board, Schematic Diagram (Sheet 4 of 4) Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 150 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 151: Backdating

    Backdating Manual backdating describes changes that must be made to this manual for power supplies whose serial numbers are lower than those listed in the title page to this manual. 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 152 Change 3 Change 10 continued In Table 5-14 A10 Control Board In Table 5-10 A6 Bias Assembly DELETE C548, 0.1uF 50V P/N 0160-4835 in parallel DELETE R830, ZERO OHMS, P/N 8159-0005. with RT500. D830 DIODE IN4150, P/N 1901-1098 RT500, P/N 0837-0412. Pins, P/N 0360-1498, qty.
  • Page 153 Table A-1. A2 GPIB Parts List Ref Desig. Keysight Part No. Description ELECTRICAL PARTS C102-105 0160-4822 Capacitor 1000pF 5% C106 0180-0155 Capacitor 2.2F 20V C107,108 0160-4787 Capacitor 22pF 5% 100V C109-111,114,115,121 0160-5422 Capacitor 0.047F 20% C122 0180-3325 Capacitor 25V C123 0160-4822 Capacitor 1000pF 5% C124...
  • Page 154 Table A-1. A2 GPIB Parts List (continued) Ref Desig. Keysight Part No. Description ELECTRICAL PARTS TB101 0360-2312 Terminal block (digital control) U101 1826-0468 IC MC3423PI U106 5080-2152 IC DROM GPIB U108 1818-4111 IC MCM 6164C55 U109 1820-6789 IC interface U110,111 1990-0444 IC Opto isolator U112...
  • Page 155 Figure A-1. A2 GPIB Component Parts List Backdating 153 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 156 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 157: Index

    Index A1 Front Panel Board, test header ..........................57 A2 GPIB Board, test header ............................57 A3 FET Board dynamic troubleshooting ............................55 static troubleshooting............................55 test connections ..............................55 test points ................................ 55, 56 analog port ..................................8 bias supply ................................... 36 cable W3 ribbon ................................
  • Page 158 CV transient response waveform ..........................18 CV transient recovery time, defined ..........................18 CV transient recovery time, testing ..........................18 CV voltage programming and readback accuracy, testing................... 16 Diagram cabling ................................ 146 DIG CNTL port, configuring ............................58 disassembly procedures ............................... 71 downprogrammer FETs, location of ..........................
  • Page 159 errors calibration ................................35 selftest ................................... 35 ESD ..................................9, 33 factory calibration constants ............................65 firmware, revisions ................................ 8 firmware revisions ............................... 64 Form, performance test record ............................. 25 front panel EEPROM factory cal location ............................... 67 initialization of ..............................67 transferring constants to ............................
  • Page 160 Mnemonics signal names ............................140 mutual coupling, test lead ............................14 noise, testing ................................14 operating manual ................................7 oscilloscope, Keysight 54504A ........................... 15 output heatsink assembly ............................. 82 output rectifiers location of ................................75 replacing ................................75 overvoltage, maximum programmable ........................14 Performance test record form ............................
  • Page 161 load ..................................12 resistor, current monitor .............................. 12 resistor, current monitoring ............................12 SA ....................................58 SA secondary interface, exiting test ..........................58 SA signals A5 microprocessor..............................59 SA signals, secondary interface ........................... 59 SA signatures, identical ............................... 60 SA signatures, similar ..............................60 SA test header jumper ..............................
  • Page 162 Troubleshooting test points ................................142 troubleshooting chart output held high ..............................36 OV at turn-on................................ 36 secondary downprogramming ..........................36 troubleshooting charts ..............................36 *TST? ................................... 34 *TST? Query ................................ 34 UNREGULATED annunciator ............................ 55 using *IDN query ................................8 voltage, maximum programmable ..........................
  • Page 163 For instruments with serial numbers: Keysight 6680A: SG41000110 and above Keysight 6681A: MY41000114 and above Keysight 6682A: MY41000106 and above Keysight 6683A: MY41000109 and above Keysight 6684A: MY41000115 and above For manual updates, a change page may be included. For instruments with lower serial numbers, or instruments with the older two-part serial number format, see Appendix A.
  • Page 164 This information is subject to change without notice. © Keysight Technologies 1993, 2000, 2014 Edition 3, December 2014 5960-5590 www.keysight.com 162 Index Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

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