1. Manuals
  2. Brands
  3. Agilent Technologies Manuals
  4. Power Supply
  5. 6029A
  6. Service manual

Agilent Technologies 6029A Service Manual

Multiple output linear system dc power supply
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
For instruments with higher serial numbers, a change page may be included.
Agilent Part No. 06626-90003
SERVICE MANUAL
MULTIPLE OUTPUT LINEAR SYSTEM
DC POWER SUPPLY
AGILENT MODELS 6625A, 6626A,
6628A and 6629A
Agilent Model 6625A, Serial 3738A-01389 through 01408
Agilent Model 6626A, Serial 3737A-02259 through 02328
Agilent Model 6628A, Serial 3738A-00683 through 00727
Agilent Model 6029A, Serial 3738A-00968 through 00997

US37380101 and up
US37370101 and up
US37380101 and up
US37380101 and up
Printed in Malaysia September 2001

Advertisement

Table of Contents
loading

Related Manuals for Agilent Technologies 6029A

Summary of Contents for Agilent Technologies 6029A

  • Page 1 Agilent Model 6626A, Serial 3737A-02259 through 02328 US37370101 and up Agilent Model 6628A, Serial 3738A-00683 through 00727 US37380101 and up Agilent Model 6029A, Serial 3738A-00968 through 00997 US37380101 and up For instruments with higher serial numbers, a change page may be included. ...
  • Page 2 90 days from date of delivery. During the warranty period Agilent Technologies will, at its option, either repair or replace products which prove to be defective. Agilent does not warrant that the operation of the software, firmware, or hardware shall be uninterrupted or error free.
  • Page 3 Because of the danger of introducing additional hazards, do not install substitute parts or perform any unauthorized modification to the instrument. Return the instrument to an Agilent Technologies Sales and Service Office for service and repair to ensure that safety features are maintained.
  • Page 4 This statement is provided to comply with the requirements of the German Sound Emission Directive, from 18 January 1991. * Sound Pressure Lp <70 dB(A) * At Operator Position * Normal Operation * According to EN 27779 (Type Test). Edition 2 September, 2001 © Copyright 2001 Agilent Technologies, Inc.

  • Page 5: Table Of Contents

    CONTENTS Section IV Section I TROUBLESHOOTING INTRODUCTION 4-1 INTRODUCTION ………………………………………..4-1 1-1 SCOPE ……………………………………………………1-1 4-2 ELECTROSTATIC PROTECTION ……………………..4-1 1-2 SAFETY CONSIDERATIONS…………………………..1-1 4-3 REMOVAL AND REPLACEMENT …………………...4-2 1-3 INSTRUMENT AND MANUAL 4-4 Top Cover Removal …………………………………….4-2 IDENTIFICATION……………………………………….1-1 4-5 Gaining Access to Assemblies in the Supply …………4-2 1-4 FIRMWARE REVISIONS ……………………………….1-1 4-6 GPIB Board Removal ..………………………………….4-2 4-8 DUSTCOVERS …………………………………………..4-4...
  • Page 6 CONTENTS (Cont. ) Section VI Appendix A CIRCUIT DIAGRAMS LOGIC SYMBOLOGY 6-1 INTRODUCTION ………………………………………..6-1 6-2 FUNCTIONAL SCHEMATIC DIAGRAMS …………..6-1 6-3 COMPONENT LOCATION ILLUSTRATIONS ……...6-1...
  • Page 7 LIST OF FIGURES Figure Page Agilent 6625A, 6826A, 6628A and 6629A Multiple Output Power Supplies, Block Diagram ……………………………...2-2 Output Operating Ranges for Agilent Models 6625A, 6626A, 6628A and 6629A …………………………………………2-3 HP-IB Board, Block Diagram ……………………………………………………………………………………………………..2-6 Output Board, Secondary Interface Circuits, Block Diagram ………………………………………………………………….2-9 Output Board, Power Mesh and Control Circuits, Block …………………………………………………………………….2-12 Voltage and Current Control Circuits, Simplified Schematic ………………………………………………………………..2-13 Typical Output Range Characteristics ………………………………………………………………………………………….2-14...
  • Page 8 LIST OF TABLES Table Page Test Equipment Required for Verification ………………………………………………………………………………………… 3-2 Low Range Voltage and Current Values …………………………………………………………………………………………… 3-4 Performance Test Record for Agilent 6625A and 6628A ...………………………………………………………………………. 3-15 Performance Test Record for Agilent 6626A and 6629A ………………………………………………………………………… 3-16 Test Equipment Required for Troubleshooting ……………………………………………………………………………………...

  • Page 9: Section I

    Section I INTRODUCTION Replaceable Parts: Section V provides a listing of SCOPE replaceable parts for all electronic components and This manual contains principles of operation, verification, mechanical assemblies. and troubleshooting information for the power supply. Replaceable parts lists and circuit diagrams are also Circuit Diagrams: Section VI contains functional schematics provided.

  • Page 10: Firmware Revisions

    If the serial number prefix on your power supply differs a yellow “Manual Changes” sheet. That sheet updates this from that shown on the title page of this manual, a yellow manual by defining any differences between the version of your supply and the versions included here, and may also Manual Change sheet that is supplied with the manual include information for correcting any manual errors.

  • Page 11: Principles Of Operation

    Section II PRINCIPLES OF OPERATION the GPIB and/or displayed on the supply’s front panel. INTRODUCTION Also, each output board can be individually calibrated over the GPIB using calibration commands (See Appendix A in The following paragraphs provide block diagram level Operating Manual).

  • Page 13: Gpib Board (Figure 2-3)

    GPIB Interface Circuit compares the voltage at the current monitor resistor with a reference and likewise varies the conduction of the series regulator. These circuits consist of the GPIB bus connector (J201), transceivers (U203) for the 8 data lines and 8 control lines, The interface circuit on the output board receives digital and the GPIB talker/listener chip (U202).

  • Page 14: System Microcomputer

    starts at zero. The contents of each address appear System Micro-Computer sequentially on the data bus (other side of the break) In addition, for all signature analysis tests, jumper W201 The system micro-computer decodes and executes all must be moved from the NORM RUN position to the SIG instructions, and controls all data transfers.

  • Page 15: Front Panel Interface

    The annunciators provide operating and status information. __ _ serial output data appears on data bus line D7. Logic 0’s will The microprocessor uses the real time clock to determine always appear on data bus lines D4-D6 when CS3 is when update/refresh the display.

  • Page 17: Output Board

    __ _ __ _ the 8-bit OV (Over Voltage) DAC. C55 selects the 2-24 OUTPUT BOARD programming latches (U367), and CS6 selects the readback monitor switches (U365, U366, and U368). The digital inputs The following paragraphs provide block diagram level (D0 –...
  • Page 18 The OV signals is also sent to the analog multiplexer so that 2-33 CV and CC Programming Range Switching. U367, it can be measured during power on self test. U364, and resistor pack U381 determine the attenuation factor for the CV and CC signals. Programming range 2-31 Readback Amplifier and Analog Multiplexer.

  • Page 20: Power Mesh And Control Circuits

    2-37 Power Mesh and Control Circuits (Figure 2-5) – This circuit generates the OV DRIVE Overvoltage Detector signal which shorts the output by firing the SCR crowbar (within the power module) on the output if any of the The power mesh circuit in the upper half of Figure 2-5 following conditions are present: converts the AC from the power transformer to regulated DC output power.
  • Page 21 The series regulator stages consist of series Series Regulators – processor then relays this information to the microprocessor pass transistors which regulate the voltage received from the which will shutdown the particular output with the selected power rail. The power module automatically selects overtemperature condition.
  • Page 22 2-12...
  • Page 23 The CV or + CL signal controls the base drive circuit via OR When the output is operating in negative current limit, the – gate diodes CR351 or CR348 to generate the – DRIVE signal CL signal controls the base drive circuit via diode CR354 so in order to control the conduction of the series regulators in that the –...
  • Page 24 LOOP signal is sent back to the secondary interface circuit to signal that represents the output voltage magnitude which is indicate that the output is in the constant voltage mode of also fed into S1. The 0 to –10 V signal is also sent back (V operation.
  • Page 25 If the output voltage is less than the programmed voltage The voltage drop ( +SHUNT-which is a negative voltage ,the junction goes positive causing U347/377 to produce a when sinking current) across the current monitoring resistor negative going CV control signal . For this condition ,the R408 is applied to summing junction S3 along with a base drive circuit will conduct less allowing more current to reference voltage.
  • Page 26 If the output voltage from +V (R359) exceeds the output terminals. Because it is biased by the voltage at the programmed overvoltage setting (derived from OV REF output terminals, it can be activated and provide protection through R357), the overvoltage comparator signal (OV even when the supply is not connected to the ac power line.
  • Page 27 2-17...

  • Page 29: Verification

    Section III VERIFICATION 3-1 INTRODUCTION This section contains test procedures that check the The tests should only be performed by qualified operation of the power supply. Four types of procedures are personnel. During the performance of these tests, provided: Operation Verification Tests, Performance Tests, the output of the supply being tested may voltage Extended Tests, and Temperature Coefficient Tests.

  • Page 32: Measurement Techniques

    being tested. It is recommended that the tests be performed in the sequence given, and that all data be recorded on the test record provided at the end of the test procedures (see paragraph 3-26). 3-6 Measurement Techniques 3-7 Setup for All Tests. Measure the dc output voltage directly at the + S and - S terminals of the output under test.
  • Page 33 Record the value displayed on the controller. This value should be within the DVM reading noted in step d and the limits specified below.] Run the program listed in step e. Record the value displayed bye the controller. This value should be within the DVM reading ±...
  • Page 34 Repeat steps a through f for each output in your ISET <ch>, <0.515(25W) or 1.03(50W) > supply. VSET <ch>, 50 Adjust the load for 0.5 or 1 Amp as indicated on the 3-14 CV Source Effect. This test measures the change front panel display.

  • Page 35: Constant Current (Cc) Tests

    3-18 Programmable OV Accuracy Test. This test checks the overvoltage (OV) programming accuracy. Taking the OV programming accuracy and the voltage programming accuracy into account. Turn off the supply and disconnect all loads and test equipment. Turn on the supply and select the output to be tested (OUTPUT SELECT key on the front panel).
  • Page 36 Divide the voltage drop across the current Divide the voltage drop across the current monitoring resistor by the value 0.1 to convert to monitoring resistor by the value 0.1 to convert to amps and record this value (Io). Note also the amps and record this value (Io).
  • Page 37 Note that the sink current (Is) changes from the previous value to between 1.04 and 1.10 amps. Read back the sink current from the selected channel over the GPIB by entering and running the program listed in paragraph 3-21. Read the value displayed on the controller. This value should be Is (from step e) ±...

  • Page 38: Extendted Tests

    3-27 EXTENDED TESTS Program the current of the selected output to the High Range Full Scale Current value and the output voltage to 50.5 volts by sending the These tests are similar to the Performance Tests except they following strings: have a much longer duration, are conducted with controlled ISET <ch>, <0.5(25W) or 1(50W)>...
  • Page 39 Turn on the supply and select the output to be Turn off the supply and connect the output to be tested (OUTPUT SELECT key on front panel). tested as shown in Figure 3-3 with the DVM Program the current of the selected output to 500 connected cross the current monitoring resistor, the mA for 25 Watt outputs or 2 Amps for 50 Watt load switch closed, and the short switch opened.
  • Page 40 Repeat steps f and g. Note the difference between Turn off the supply and connect the output to be the values read before and after the temperature tested as shown in Figure 3-7. change. The difference between the output voltage DVM readings should be less than 16 mV.
  • Page 41 On Channel A, observe the output voltage Turn on the supply and select the output to be transition from the High Range Full Scale Voltage tested (OUTPUT SELECT key on the front panel). to the scope's bottom horizontal line. Look for a First, program the selected output’s voltage to 50 smooth exponential waveform with no "kinks"...
  • Page 42 Scale. The diodes (see Figure 3-9) prevent gross Do not turn on the supply. This test is performed overload of Channel B (which is set at 50 mV division) with the ac power turned off. allowing examination of the “tail” of the exponential waveform.
  • Page 44 3-16...

  • Page 45: Troubleshooting

    Section IV TROUBLESHOOTING 4-2 ELECTROSTATIC PROTECTION Most of the maintenance procedures given in this section are performed with power applied and protective covers removed. Such maintenance This instrument uses components which can be should be performed only by service - trained damaged by static charge.

  • Page 46: Removal And Replacement

    Do not wear a conductive wrist strap when To avoid the possibility of personal injury, remove working with potentials in excess of 500 volts; the the power supply from operation before removing one-megohm resistor will provide insufficient the covers. Turn off ac power and disconnect the current limiting for personal safety.

  • Page 48: Gpib Board Removal

    sure to eliminate any static charge which may have 4-6 GPIB Board Removal accumulated on them. Removing static charge can be accomplished using an ionized air source directed across the Looking at the unit form the front, the GPIB board is covers.

  • Page 49: Chassis Mounted Components

    Remove the rack ears or vinyl trim from the sides of the front panel. Remov e the two screw s on e ach side of fro nt panel. Be sure to remove the AC line cord from the unit before attempting to work on the AC line module. Slide t h e pan el forward.
  • Page 50 NOTE: The GPIB troubleshooting procedures in this section apply only to earlier through-hole board assemblies. Surface-mount GPIB assemblies are not repairable to the component level. If defective, the entire GPIB assembly must be replaced.

  • Page 51: Initial Troubleshooting And Board Isolation Procedures

    4-15 Power-On Self Test 4-14 INITIAL TROUBLESHOOTING AND BOARD ISOLATION PROCEDURES The power-on self test sequence performs tests on the GPIB board as well as on each output board in the supply. Table Initial troubleshooting procedures for the power supply are 4-3 lists the tests, the boards tested, and the error message given in the flow chart of Figure 4-5.

  • Page 52: Connector P201 Jumper Positions

    Note that error number 22, SKIP SELF TEST, is initially this position, error number 18 (CAL LOCKED) is generated if an attempt generated when W201 is in the SKIP SELF TEST position. This error is cleared when read. However, if an output is made to turn on the mode (see board fails the output board RAM or ROM tests which are Appendix...
  • Page 54 4-10...

  • Page 55: Gpib Board And Front Panel Troubleshooting Procedures

    GPIB 4-18 BOARD FRONT PANEL 4-20 Post Repair Calibration TROUBLESHOOTING PROCEDURES If the GPIB board is replaced or it is repaired by replacing NOTE: the EEPROM chip (U230 or U231), each output in the supply The GPIB troubleshooting procedures in this section apply only to must be recalibrated as described in Appendix A of the earlier through-hole board assemblies.

  • Page 56: Signature Analysis Testing

    4-23 Test Setup for S.A. NOTE Figure 4-7 shows the general test setup for the signature analysis tests given in Tables 4-6 through 4-13. Note that The MODEL command removes all calibration jumper pack W202 can be installed in either of two positions constants substitutes default...
  • Page 57 4-13...
  • Page 58 4-14...
  • Page 59 4-15...
  • Page 60 4-16...
  • Page 61 4-17...
  • Page 62 4-18...
  • Page 63 Table 4-7. GPIB Board S.A. Test No. 2 Description: This test checks the ROM (U206) and the data bus to the output of the Data Latches (U217) in the system microcomputer. Test Setup: Use the test setup described in paragraph 4-23. Connect jumper pack W202 in the NOP and set up the signature analyzer as shown below.
  • Page 64 4-20...
  • Page 65 4-21...
  • Page 66 4-22...
  • Page 67 4-23...
  • Page 68 4-24...
  • Page 69 4-25...
  • Page 70 4-26...
  • Page 71 4-27...

  • Page 72: Output Board Troubleshooting

    4-25 OUTPUT BOARD TROUBLESHOOTING 4-28 Self Exercise Routine on an Output Board PROCEDURES The output board can be put into a mode that exercises the microcomputer (U312) and all of the DAC’s for ease of Overall troubleshooting procedures for an output board are troubleshooting.
  • Page 74 4-30...
  • Page 75 4-31...
  • Page 76 4-32...
  • Page 77 4-33...
  • Page 78 4-34...
  • Page 79 4-35...
  • Page 80 4-36...
  • Page 81 4-37...
  • Page 82 4-38...
  • Page 84 4-40...
  • Page 85 4-41...
  • Page 86 4-42...
  • Page 87 4-43...

  • Page 88: Troubleshooting Analog Multiplexer U323 And Readback Using Vmux? Command

    The analog multiplexer circuit is shown on the functional schematic of Figure 6-3, Sheet 1 and on he block diagram of Figure 2-4. The eight input signals to the analog multiplexer U323 are shown in table 4-16. The VMUX? command reads back approximately – 1.05 times the voltage that appears on the selected input.

  • Page 89: Understanding And Troubleshooting The Signal

    circuitry is probably defective. If only on input is incorrect, A typical program run is shown below. the circuitry associated with that one input is probably VMUX? Response 1 = .2179 VM reads .009 defective (see Figure 6-3). VMUX? Response 2 = .2283 VM reads 0 VMUX? Response 3 = .2179 VM reads 6.548 4-30 Understanding and Troubleshooting the VMUX? Response 4 = .2179 VM reads .196...
  • Page 90 4-46...
  • Page 91 NOTES: 1. Signal levels are referenced to common. 2. *Indicates that the stated voltage threshold depends upon the value of the – 7 V (nominal) supply. For example, if the value of the – 7 V supply is actually – 7.1 V (0.1 V lower than – 7 V), then the LOW value given fro pin 25 would read < 6.8 V (which is 0.1 V lower than –...
  • Page 92 ______ OV COMP (pin 2): The OV COMP (overvoltage THERM (pin 14): This input signal, when Low (indicating comparator) input signal, when High, causes OV DRIVE ___________ an overtemperature condition), causes OT (pin 15) to go (pin 6) to be High (>8 V) if POV DISABLE (pin 3) is Low. High when STATUS SELECT (pin 11) is Low.

  • Page 93: Power Module Signals

    ____ _________ ON/OFF (pin 25): This output pin goes High when PCLR 4-33 Power Module Signals (pin 26) is High and OUT ENABLE (pin 24) is Low (see Figure 4-16). When High, the ON/OFF line enables the Table 4-18 gives the function and typical signal levels at each control circuits and current sources of the output board pin for a properly operating power module (U338).
  • Page 94 4-50...
  • Page 95 4-51...
  • Page 96 4-52...
  • Page 97 4-53...

  • Page 99: Replaceable Parts

    Section V REPLACEABLE PARTS 5-2 HOW TO ORDER PARTS 5-1 INTRODUCTION You can order parts from your local Agilent sales office. This section contains information on ordering replacement Refer to the list of sales offices at the back of the manual for parts.
  • Page 100 Table 5-3. Description of Abbreviations ANLG Analog ASSY Assembly American Wire Gauge BAR-BLK Barrier Block BNDPOST Binding – Post Bottom BRDG Bridge Ceramic CHAS Chassis COMP Carbon Film Composition CONN Connector CORR Corrugated Container CUSHD Cushioned Digital-to-Analog Converter! DBLCHAM Double Chamber Diode EEPROM Electrically Erasable Programmable Read Only Memory...
  • Page 101 01121 Allen Bradley Company Mlwaukee, WI 16299 Corning Glass Works Raleigh, NC 07263 Fairchild Semiconductor Corp. Hicksville, NY 28480 Agilent Technologies Palo Alto, CA 80795 New York, NY 81483 International Rectifier Los Angeles, CA 19701 Mepco/Electro Corp. Mineral Wells, TX...
  • Page 102 Table 5-5. CHASSIS Replacement Parts List Design Agilent Part No. Description Mfg. Mfg. Code Part No. Chassis – Boards GPIB BOARD Assembly (see Table 5-6) 06626-61026 28480 Output Board 1 06626-61020 Models 6625A, 6626A (25W/.5A)(see Table 5-7) 28480 06626-61023 Models 6628A, 6629A (50W/2A)(see Table 5-8) 28480 Output Board 06626-61023...
  • Page 103 Table 5-5. CHASSIS Replacement Parts List (continued) Design Agilent Part No. Description Mfg. Mfg. Code Part No. Chassis - Mechanical/ Electrical TB001 0360-2195 BARRIER BLOCK 6-TERM THRMP 2.307-IN-L 1642 8 28480 06624-20007 BARRIER BLK COVER 28480 0360-2310 JUMPER (REF BARRIER BLK) 28480 0380-0643 STANDOFF-HEX .225 IN...
  • Page 104 Table 5-5. CHASSIS Replaceable Parts List (continued) Design. Agilent Part No. Description Mfg. Code Mfg. Part No. Chassis Electrical TRANSFORMER - BIAS/POWER 6626A 9100-4591 28480 TRANSFORMER - BIAS/POWER 6625A 9100-4720 28480 FUSE 2A 250V TD FE UL (REF F308,9) 2110-0303 28480 FINGER GUARD (REF COOLING FAN) 3160-0092...
  • Page 105 Table 5-6B. GPIB Through-hole Replacement Parts List Design Agilent Part Description Mfg. Mfg. Code Part No. C201-05 1060-4835 FXD CER. 0.1µf 10% 50VdC 28480 µ FXD ELECT. 10 f 10% 20Vdc C206 0180-0374 56289 150D106X9020B2 µ FXD CER. 0.1 f 10% 50Vdc C207-12 1060-4835 28480...
  • Page 106 Table 5-6B. GPIB Through-hole Replacement Parts List (Continued) Design Agilent Part Description Mfg. Mfg. Code Part No. U209 1820-0935 IC COUNTER CMOS BIN 04713 MC14020BCP U210 1820-3848 IC FF CMOS D-TYPE 04713 MM74HCT374N U211 1820-1427 IC DCDR TTL LS 2 TO 4 LINE 01295 SN74LS156N U212...
  • Page 107 Table 5-7. 25W/0.5A BOARD Replacement Parts List Design Agilent Part Description Mfg. Mfg. Code Part No. C300 0160-4833 CAPACITOR-FXD .022µF ± 10% 100VDC CER 16299 C301 0180-3801 CAPACITOR-FXD 1800µF+30-10% 63VDC AL 56289 C302 0180-3799 CAPACITOR-FXD 2700µF+30-10% 50VDC AL 56289 C303,04 0160-4835 CAPACITOR-FXD .1µF±10% 50VDC CER 16299...
  • Page 108 Table 5-7. 25W/0.5A BOARD Replacement Parts List (Continued) Design Agilent Part Description Mfg. Mfg. Code Part No. C368-70 0180-0393 CAPACITOR-FXD 39µF±10% 10VDC TA 56289 150D396X9010B2 C372 0160-4830 CAPACITOR-FXD 2200PF ± 10% 100VDC CER 16299 C373,74 NOT USED C375,76 0180-3804 CAPACITOR-FXD 47µF±20% 35VDC TA 56289 C377-80 NOT USED...
  • Page 109 Table 5-7. 25W/0.5A BOARD Replacement Parts List (Continued) Design Agilent Part Description Mfg. Mfg. Code Part No. C430,31 NOT USED C432 0160-4822 CAPACITOR-FXD 1000PF ±5% 100VDC CER 16299 C433 0160-4791 CAPACITOR-FXD 10PF ±5% 100VDC CER 16299 C434,35 NOT USED 0160-6999 CAPACITOR-FXD 2200PF ±5% MET-POLYE 84411 C436...
  • Page 110 Table 5-7. 25W/0.5 BOARD Replacement Parts List (Continued) Design Agilent Part Description Mfg. Mfg. Code Part No. CR380,81 1901-0033 DIODE-GEN PRP 180V 200MA 9N171 1N645 D407 0812-0010 RESISTOR-FXD 28480 F300 2110-0916 FUSE-SUBMINIATURE 7AT 125V 75915 F302 2110-0716 FUSE-SUBMINIATURE .5A 125V 75915 F303 2110-0685...
  • Page 111 Table 5-7. 25W/0.5A BOARD Replacement Parts List (Continued) Design Agilent Part Description Mfg. Mfg. Code Part No. R335,36 0757-0473 RESISTOR 221K 1% .125W TF 28480 CT4-1/8-TO-2371-F R337,38 0757-0438 RESISTOR 5.1K 1% .125W TF 24546 CT4-1/8-TO-5111-F R339 8159-0005 RESISTOR 0 OHMS 28480 R340 0757-0430...
  • Page 112 Table 5-7. 25W/0.5A BOARD Replacement Parts List (Continued) Design Agilent Part Description Mfg. Mfg. Code Part No. R396 0757-0200 RESISTOR 5.62K 1% .125W TF 24546 CT4-1/8-TO-5621-F R397 0757-0481 RESISTOR 475K 1% .125W TF 19701 5033R-1/8-TO-4753-F R398 0757-0280 RESISTOR 1K 1% .125W TF 24546 CT4-1/8-TO-1001-F R399...
  • Page 113 Table 5-7. 25W/0.5A BOARD Replacement Parts List (Continued) Design Agilent Part Description M fg. Mfg. Code Part No. R451 0757-0280 RESISTOR 1K 1% .125W TF 24546 CT4-1/8-TO-1001-F R452 0757-0283 RESISTOR 2K 1% .125W TF 24546 CT4-1/8-TO-2001-F R453 0698-4480 RESISTOR 15.8K 1% .125W TF 24546 CT4-1/8-TO-1582-F R454...
  • Page 114 Table 5-7. 25W/0.5A BOARD Replacement Parts List (Continued) Design Agilent Part Description Mfg. Mfg. Code Part No. R516-604 NOT USED R605 0757-0199 RESISTOR 21.5K 1% .125W TF 24546 CT4-1/8-TO-2152-F R606-09 NOT USED R610,11 0757-0199 RESISTOR 21.5K 1% .125W TF 24546 CT4-1/8-TO-2152-F R612-19 NOT USED...
  • Page 115 Table 5-7. 25W/0.5A BOARD Replacement Parts List (Continued) Design Agilent Part Description Mfg. Mfg. Code Part No. U334,35 1906-0349 DIODE-FW BRDG 200V 6A 71744 KBPC602 U336 1858-0088 TRANSISTOR ARRAY 04713 MPQ7091 U337 1826-1843 04713 TL431IP 5060-3567 U338 IC POWER HYBRED 28480 U339 NOT USED...
  • Page 116 Table 5-8. 50W/2A BOARD Replacement Parts List Design Agilent Part Description Mfg. Mfg. Code Part No. C300 0160-4833 CAPACITOR-FXD .022µF ±10% 100VDC CER 16299 C301 0180-3801 CAPACITOR-FXD 1800µF + 30-10% 63VDC AL 19701 C302 0180-3799 CAPACITOR-FXD 2700µF + 30-10% 50VDC AL 19701 C303,04 0160-4835...
  • Page 117 Table 5-8. 50W/2A BOARD Replacement Parts List (Continued) Design Agilent Part Description Mfg. Mfg. Code Part No. C369 0160-4833 CAPACITOR-FXD .022µF ± 10% 100VDC CER 16299 C370 0180-0393 CAPACITOR-FXD 39µF ± 10% 10VDC TA 56289 150D396X9010B2 C371 0160-4835 CAPACITOR-FXD .1µF ± 10% 50VDC CER 16299 C372 0160-4830...
  • Page 118 Table 5-8. 50W/2A BOARD Replacement Parts List (Continued) Design Agilent Part Description Mfg. Mfg. Code Part No. C428 0160-5422 CAPACITOR-FXD .047 F ±20% 50VDC CER 16299 µ C429 0160-5098 CAPACITOR-FXD .22 F ±10% 50VDC CER 16299 CAC05X7R224J050A µ C430,31 NOT USED C432 0160-4822 CAPACITOR-FXD 1000PF ±5% 100VDC CER...
  • Page 119 Table 5-8. 50W/2A BOARD Replacement Parts List (Continued) Design Agilent Part Description Mfg. Mfg. Code Part No. CR361,62 1901-0731 DIODE-PWR RECT 400V 1A 71468 1N4004G CR363 1901-0033 DIODE-GEN PRP 180V 200MA 9N171 1N645 CR364-70 NOT USED CR371 1901-0050 DIODE-SWITCHING 80V 200MA 2NS 9N171 1N4150 CR372-79...
  • Page 120 Table 5-8. 50W/2A BOARD Replacement Parts List (Continued) Design Agilent Part Description Mfg. Mfg. Code Part No. R328 8159-0005 RESISTOR-ZERO OHMS 72982 R329-32 NOT USED R333 0757-0410 RESISTOR 301 1% .125W TF 24546 CT4-1/8-TO-301R-F R334 NOT USED R335,36 0757-0473 RESISTOR 221K 1% .125W TF 28480 CT4-1/8-TO-1003-F R337,38...
  • Page 121 Table 5-8. 50W/2A BOARD Replacement Parts List (Continued) Design Agilent Part Description Mfg. Mfg. Code Part No. R391 0757-0442 RESISTOR 10K 1% .125W TF 24546 CT4-1/8-TO-1002-F R392 0757-0282 RESISTOR 221 1% .125W TF 24546 CT4-1/8-TO-221R-F R393 0698-0435 RESISTOR 2.49K 1% .125W TF 24546 CT4-1/8-TO-2491F R394...
  • Page 122 Table 5-8. 50W/2A BOARD Replacement Parts List (Continued) Design Agilent Part Description Mfg. Mfg. Code Part No. R446 0698-4480 RESISTOR 15.8K 1% .125W TF 24546 CT4-1/8-TO-1582-F R447 0757-0440 RESISTOR 7.5K 1% .125W TF 24546 CT4-1/8-TO-7501-F R448 0757-0469 RESISTOR 150K 1% .125W TF 24546 CT4-1/8-TO-1503-f R449...
  • Page 123 Table 5-8. 50W/2A BOARD Replacement Parts List (Continued) Design Agilent Part Description Mfg. Mfg. Code Part No. 01121 EB1065 R508,09 0686-1065 RESISTOR 10M 5% .5W CC R510,11 NOT USED 01121 CB1065 R512 0683-1065 RESISTOR 10M 5% .25W CC R513 NOT USED RESISTOR 2.49K 1% .125W TF 24546 CT4-1/8-TO-6811-F...
  • Page 124 Table 5-8. 50W/2A BOARD Replacement Parts List (Continued) Design Agilent Part Description Mfg. Mfg. Code Part No. U324 1826-1475 IC COMPARATOR CP 10858 LT1011CN8 U325 1826-0412 IC COMPARATOR PRON DUAL 27014 LM393N U326 1810-039 NETWORK-RES 01121 U327 1826-1842 IC ANALOG SPECIAL U328-33 NOT USED U334,35...
  • Page 125 Section VI CIRCUIT DIAGRAMS 6-1 INTRODUCTION This section contains functional schematic diagrams and Figure 6-3 (Sheets 1 through 5) show the following circuits component location diagrams for the power supply. and cover all output board types. Differences between the types are indicated on the schematic. 6-2 FUNCTIONAL SCHEMATIC DIAGRAMS Sheet 1 - Secondary interface circuits.
  • Page 126 Schematic Notes For Figure 6-1 Fuse F1 is 8A for 100/120 Vac input or 4A for 220/240 Vac input. Before connecting the supply to the power source, check that the position of voltage line voltage source (100, 120, 220, or 240 Vac). See Section II in the Operating Manual (Agilent P/N 06626-90001) for details. The reference designators (W1, W2, etc.) for the cable assemblies are for schematic reference only.
  • Page 127 Figure 6-1. Power Distribution Schematic (sheet 1 of 2)
  • Page 128 Figure 6-1. Power Distribution Schematic (sheet 2 of 2)
  • Page 129 NOTES: Switch 1 - the model function. ON selects models This surface-mount GPIB assembly applies to models 6621A, 6622A, 6623A, 6624A, and 6627A. OFF starting with the following serial numbers and up: selects models 6625A, 6626A, 6628A, and 6629A. 6625A 3738A01389-up As-shipped position = OFF 6626A 3737A02259-up 6628A 3738A00727-up...
  • Page 130 J205 R239 SELECTOR 1252-2493 P205 U212 D[0:7] 1821-0300 J205 CAL_LOCKOUT NL1251-5385 SKIP_SELFTEST 0699-1318 P205 1252-2493 INTERCONN CABLE D[0:7] D[0:7] 74ABT541 J205 SA_MODE NL1251-5385 (RIBBON) P205 1252-2493 COLS P202 J205 NL1251-5385 U213 U210 U204 U206 U201 U281 U211 U207 U230 1251-8105 P205 1252-2493 J206...
  • Page 131 Figure 6-3. Output 1 & 2 Board, Component Location...
  • Page 132 Figure 6-3. Output 1 & 2 Board, Schematic Diagram (sheet 1 of 5)
  • Page 133 Figure 6-3. Output 1 & 2 Board, Schematic Diagram (sheet 2 of 5)
  • Page 134 Figure 6-3. Output 1 & 2 Board, Schematic Diagram (sheet 3 of 5) 6-10...
  • Page 135 Figure 6-3. Output 1 & 2 Board, Schematic Diagram (sheet 4 of 5) 6-11...
  • Page 136 Figure 6-3. Output 1 & 2 Board, Schematic Diagram (sheet 5 of 5) 6-12...
  • Page 137 Figure 6-4. Output 3 & 4 Board, Component Location 6-13...
  • Page 138 Figure 6-4. Output 3 & 4 Board, Schematic Diagram (sheet 1 of 5) 6-14...
  • Page 139 Figure 6-4. Output 3 & 4 Board, Schematic Diagram (sheet 2 of 5) 6-15...
  • Page 140 Figure 6-4. Output 3 & 4 Board, Schematic Diagram (sheet 3 of 5) 6-16...
  • Page 141 Figure 6-4. Output 3 & 4 Board, Schematic Diagram (sheet 4 of 5) 6-17...
  • Page 142 Figure 6-4. Output 3 & 4 Board, Schematic Diagram (sheet 5 of 5) 6-18...
  • Page 143 INDEX Output Board Post Repair and Calibrati………..…………4-28 Output Boards Interface …………………..…………………2-4 AC Input Circuits ………………………………..……………2-1 Performance Test Record …….……………………………..3-15 CC Tests ……………………………………………...………. 3-7 Power Mesh and control Circuits ……..…………………2-10 CV Tests ………………………………………...……………..3-4 Principles of Operation Component Locations and Illustrations ……...…………….6-1 AC Input Circuit ………………...………………………….2-1 Connector P201 Jumper ………………...……………………4-8 GPIB Board .……………………...…………………………2-1...
  • Page 144 Agilent Sales and Support Office For more information about Agilent Technologies test and measurement products, applications, services, and for a current sales office listing, visit our web site: http://www.agilent.com/find/tmdir You can also contact one of the following centers and ask for a test and measurement sales representative.
  • Page 145 Manual Updates The following updates have been made to this manual since the print revision indicated on the title page. 11/20/03 Settings corrections have been made to paragraphs 3-24 e. and 3-25 c.

This manual is also suitable for:

6626a6628a6625a

Table of Contents