Agilent E3632A DC Power Supply Service Guide Agilent Technologies
Notices © Agilent Technologies, Inc. 1997–2013 Warranty No part of this manual may be reproduced in any form or by any means (including electronic storage and retrieval or translation into a foreign language) without prior agreement and written consent from Agilent Technologies, Inc. as governed by United States and international copyright laws. The material contained in this document is provided “as is,” and is subject to change, without notice, in future editions.
Safety Symbols The following symbols on the instrument and in the documentation indicate precautions which must be taken to maintain safe operation of the instrument. Caution, risk of danger (refer to this manual for specific Warning or Caution information) In position of a bi-stable push control DC (Direct current or voltage) Terminal is at earth potential. Used for measurement and control circuits designed to be operated with one terminal at earth potential.
Safety Considerations Read the information below before using this instrument. The following general safety precautions must be observed during all phases of operation, service, and repair of this instrument. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards for design, manufacture, and intended use of the instrument. Agilent Technologies assumes no liability for the customer’s failure to comply with these requirements.
WA R N I N G • Do not use MAINS supply cords by inadequately RATED cord. Always use the MAINS supply cord provided by the manufacturer. • Do not use the device if it appears damaged or defective. REMOVE POWER and do not use the device until safe operation is verified by service-trained personnel. If necessary, return the device to Agilent for service and repair to ensure that the safety features are maintained. • Do not operate the device around flammable gases or fumes, vapor, or wet environments.
Safety and EMC Requirements This power supply is designed to comply with the following safety and Electromagnetic Compatibility (EMC) requirements: • IEC61326-1:2005/EN61326-1:2006 • Canada: ICES/NMB-001: Issue 4, June 2006 • Australia/New Zealand: AS/NZS CISPR11:2004 • IEC 61010-1:2001/EN 61010-1:2001 • Canada: CAN/CSA-C22.2 No. 61010-1-04 • USA: ANSI/UL 61010-1:2004 Environmental Conditions This instrument is designed for indoor use and in an area with low condensation.
Regulatory Markings The CE mark is a registered trademark of the European Community. This CE mark shows that the product complies with all the relevant European Legal Directives. The C-tick mark is a registered trademark of the Spectrum Management Agency of Australia. This signifies compliance with the Australia EMC Framework regulations under the terms of the Radio Communication Act of 1992. ICES/NMB-001 indicates that this ISM device complies with the Canadian ICES-001.
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC This instrument complies with the WEEE Directive (2002/96/EC) marking requirement. This affixed product label indicates that you must not discard this electrical or electronic product in domestic household waste. Product Category: With reference to the equipment types in the WEEE directive Annex 1, this instrument is classified as a “Monitoring and Control Instrument” product. The affixed product label is as shown below.
Declaration of Conformity (DoC) The Declaration of Conformity (DoC) for this instrument is available on the Agilent Web site. You can search the DoC by its product model or description at the Web address below. http://regulations.corporate.agilent.com/DoC/search.htm NOTE E3632A Service Guide If you are unable to search for the respective DoC, contact your local Agilent representative.
THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.
Table of Contents 1 Calibration Procedures Closed-Case Electronic Calibration Agilent Calibration Services Calibration Interval 2 2 2 Automating Calibration Procedures Recommended Test Equipment Test Considerations 3 4 5 Performance Verification Tests 6 Self-test 6 Performance verification tests 7 Measurement Techniques 8 Setup for most tests 8 Electronic load 9 Current-monitoring resistor Programming 10 9 Constant Voltage (CV) Verifications 11 Constant voltage test setup 11 Voltage programming a
Normal mode current noise (CC ripple and noise) Common Mode Current Noise 19 21 Performance Test Record for E3632A CV performance test record 22 CC performance test record 23 22 Calibration Security Code 24 To unsecure the power supply for calibration 25 To unsecure the power supply without the security code Calibration Count 26 28 Calibration Message 28 General Calibration/Adjustment Procedure Voltage and OVP calibration 30 Current and OCP calibration 33 Aborting a Calibration in Progress Calibra
To Replace the Power-Line Fuse 52 To Disconnect the Output Using an External Relay 52 Installation procedure for an external relay 53 Troubleshooting Hints 54 Unit is inoperative 54 Unit reports errors 740 to 750 Unit fails self-test 55 Bias supplies problems 55 55 Self-Test Procedures 57 Power-on self-test 57 Complete self-test 57 Component Locator Diagram 61 Component locator diagram for the main board assembly — top 61 Component locator diagram for the front panel — top 62 Component locator diagram f
THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.
List of Figures Figure 1-1 Performance verification test setup 8 Figure 1-2 Transient response time 15 E3632A Service Guide XV
THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.
List of Tables Table 1-1 Table 1-2 Table 1-3 Table 1-4 Table 1-5 Table 1-6 Table 1-7 Table 1-8 Table 2-1 Table 2-2 Table 2-3 E3632A Service Guide Recommended test equipment 4 CV performance test record 22 CC performance test record 23 Parameters for calibration 29 Calibration record for E3632A 37 System error messages 38 Self-test error messages 39 Calibration error messages 40 Bias supplies voltages 55 Bias supplies voltages (serial MY53xx6xxx) 56 Self-test error messages 57 XVII
THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.
E3632A DC Power Supply Service Guide 1 Calibration Procedures Closed-Case Electronic Calibration 2 Agilent Calibration Services 2 Calibration Interval 2 Automating Calibration Procedures 3 Recommended Test Equipment 4 Test Considerations 5 Performance Verification Tests 6 Measurement Techniques 8 Constant Voltage (CV) Verifications 11 Constant Current (CC) Verifications 16 Common Mode Current Noise 21 Performance Test Record for E3632A 22 Calibration Security Code 24 Calibration Count 28 Calibration Messag
1 Calibration Procedures Closed-Case Electronic Calibration Closed-Case Electronic Calibration The power supply features closed- case electronic calibration since no internal mechanical adjustments are required for normal calibration. The power supply calculates correction factors based upon the input reference value you enter. The new correction factors are stored in non- volatile memory until the next calibration adjustment is performed.
Calibration Procedures Automating Calibration Procedures 1 Automating Calibration Procedures You can automate the complete verification procedures outlined in this chapter if you have access to programmable test equipment. You can program the instrument configurations specified for each test over the remote interface. You can then enter readback verification data into a test program and compare the results to the appropriate test limit values.
1 Calibration Procedures Recommended Test Equipment Recommended Test Equipment The test equipment recommended for the performance verification and adjustment procedures is listed below. If the exact instrument is not available, use the accuracy requirements shown to select substitute calibration standards. Table 1-1 Recommended test equipment Instrument Requirements Recommended model Test function GPIB controller Full GPIB capabilities Agilent 82341C Interface card Programming and readback accuracy.
Calibration Procedures Test Considerations 1 Test Considerations To ensure proper instrument operation, verify that you have selected the correct power- line voltage prior to attempting any test procedure in this chapter. Refer to the E3632A User’s Guide for more information. For optimum performance verification, all test procedures should comply with the following recommendations. • Assure that the calibration ambient temperature is stable and between 20 °C and 30 °C.
1 Calibration Procedures Performance Verification Tests Performance Verification Tests The performance verification tests use the power supply's specifications listed in the E3632A User’s Guide. You can perform two different levels of performance verification tests: • Self- test A series of internal verification tests that provides high confidence that the power supply is operational.
Calibration Procedures Performance Verification Tests 1 Performance verification tests These tests can be used to verify the power supply specifications following repairs to specific circuits. The following sections explain all verification procedures in detail. All of the performance test specifications are shown in each test.
1 Calibration Procedures Measurement Techniques Measurement Techniques Setup for most tests Most tests are performed at the front terminals as shown in the following figure. Measure the DC voltage directly at the (+) and (–) terminals on the front panel.
Calibration Procedures Measurement Techniques 1 Electronic load Many of the test procedures require the use of a variable load resistor capable of dissipating the required power. Using a variable load resistor requires that switches be used to connect, disconnect, and short the load resistor. An electronic load, if available, can be used in place of a variable load resistor and switches. The electronic load is considerably easier to use than load resistors.
1 Calibration Procedures Measurement Techniques Programming Most performance tests can be performed only from the front panel. However, a GPIB or RS- 232 controller is required to perform the voltage and current programming accuracy and readback accuracy tests. The test procedures are written assuming that you know how to program the power supply either from the front panel or from a GPIB or RS- 232 controller.
Calibration Procedures Constant Voltage (CV) Verifications 1 Constant Voltage (CV) Verifications Constant voltage test setup If more than one meter or a meter and an oscilloscope are used, connect each to the (+) and (–) terminals by a separate pair of leads to avoid mutual coupling effects. Use a coaxial cable or shielded 2- wire cable to avoid noise pick- up on the test leads.
1 Calibration Procedures Constant Voltage (CV) Verifications 4 Record the output voltage reading on the digital voltmeter (DVM). The reading should be within the limits of 0 V ±10 mV. Note that the CV, Adrs, Limit, and Rmt annunciators are on. 5 Readback the output voltage over the remote interface by sending the command: MEAS:VOLT? 6 Record the value displayed on the controller. This value should be within the limits of DVM ±5 mV. 7 Program the output voltage to full rated value (30.
Calibration Procedures Constant Voltage (CV) Verifications 1 3 Operate the electronic load in constant current mode and set its current to 4.0 A. Check that the front panel CV annunciator remains lit. If not lit, adjust the load so that the output current drops slightly until the CV annunciator lights. Record the output voltage reading on the digital voltmeter. 4 Operate the electronic load in open mode (input off). Record the output voltage reading on the digital voltmeter immediately.
1 Calibration Procedures Constant Voltage (CV) Verifications 6 Adjust the autotransformer to high line voltage (127 Vac for nominal 115 Vac, 110 Vac for nominal 100 Vac, or 253 Vac for nominal 230 Vac). Record the voltage reading on the digital voltmeter immediately. The difference between the digital voltmeter readings in steps 5 and 6 is the CV line regulation. The difference of the readings during the immediate change should be within the limit of 5 mV.
Calibration Procedures Constant Voltage (CV) Verifications 1 Load transient response time This test measures the time for the output voltage to recover to within 15 mV of nominal output voltage following a load change from full load to half load, or half load to full load. 1 Turn off the power supply and connect the output to be tested as shown in Figure 1- 1 with an oscilloscope. Operate the electronic load in constant current mode. 2 Turn on the power supply.
1 Calibration Procedures Constant Current (CC) Verifications Constant Current (CC) Verifications Constant current test setup Follow the general setup instructions in the “Measurement Techniques” on page 8 and the specific instructions given in the following paragraphs. Current programming and readback accuracy This test verifies that the current programming and the GPIB or RS- 232 readback functions are within specifications.
Calibration Procedures Constant Current (CC) Verifications 1 CURR 0 4 Divide the voltage drop (DVM reading) across the current monitoring resistor (RM) by its resistance to convert to amps and record this value (IO). This value should be within the limits of 0 A ±10 mA. Also, note that the CC, Adrs, Limit, and Rmt annunciators are on. 5 Readback the output current over the remote interface by sending the command: MEAS:CURR? 6 Record the value displayed on the controller.
1 Calibration Procedures Constant Current (CC) Verifications 2 Turn on the power supply. Select the 15 V/7 A range, enable the output, and set the display to the limit mode. When the display is in the limit mode, program the output voltage to the maximum programmable value and the output current to the full rated value (7.0 A). 3 Operate the electronic load in constant voltage mode and set its voltage to 15.0 V. Check that the CC annunciator is on.
Calibration Procedures Constant Current (CC) Verifications 1 4 Operate the electronic load in constant voltage mode and set its voltage to 15.0 V. Check that the CC annunciator remains lit. If not lit, adjust the load so that the output voltage drops slightly until the CC annunciator lights. 5 Adjust the transformer to low line voltage limit (104 Vac for nominal 115 Vac, 90 Vac for nominal 100 Vac, or 207 Vac for nominal 230 Vac).
1 Calibration Procedures Constant Current (CC) Verifications 3 The output current should be at the full- rated rating with the CC annunciator on. If not lit, adjust the load so that the output voltage drops slightly until the CC annunciator lights. 4 Divide the reading on the RMS voltmeter by the load resistance to obtain rms current. The readings should be within the limit of 2 mA.
Calibration Procedures Common Mode Current Noise 1 Common Mode Current Noise The common mode current is that AC current component which exists between the output or output lines and chassis ground. Common mode noise can be a problem for very sensitive circuitry that is referenced to earth ground. When a circuit is referenced to earth ground, a low level line- related AC current will flow from the output terminals to earth ground.
1 Calibration Procedures Performance Test Record for E3632A Performance Test Record for E3632A CV performance test record Table 1-2 CV performance test record Test description Actual result Specifications Upper limit Lower limit CV programming accuracy @ 0 volts (DVM reading) +0.0100 V –0.0100 V CV readback accuracy @ 0 volts DVM + 0.0050 V DVM – 0.0050 V CV programming accuracy @ full scale (DVM reading) +30.025 V 29.9750 V CV readback accuracy @ full scale DVM + 0.0200 V DVM – 0.
Calibration Procedures Performance Test Record for E3632A 1 CC performance test record Table 1-3 CC performance test record Test Description Actual Result Specifications Upper Limit Lower Limit CC programming accuracy @ 0 A (IO) +0.0100 A –0.0100 A CC readback accuracy @ 0 A IO + 0.0050 A IO – 0.0050 A CC programming accuracy @ full scale (IO) 7.0240 A 6.9760 A CC readback accuracy @ full scale IO + 0.0155 A IO – 0.0155 A CC load regulation Maximum change: <0.
1 Calibration Procedures Calibration Security Code Calibration Security Code This feature allows you to enter a security code (electronic key) to prevent accidental or unauthorized calibrations of the power supply. When you first receive your power supply, it is secured. Before you can calibrate the power supply, you must unsecure it by entering the correct security code. A procedure to unsecure the power supply is given on the following page.
Calibration Procedures Calibration Security Code 1 To unsecure the power supply for calibration The power supply can use a calibration security code to prevent unauthorized or accidental calibration. This procedure shows you how to unsecure the power supply for calibration from the front panel. Calibrate Power 1 Turn on the front- panel calibration mode.
1 Calibration Procedures Calibration Security Code Secure 4 Unsecure the power supply. UNSECURED The power supply is unsecured when you press the Secure key. You will see the above message from the front panel for one second. The CAL MODE message is displayed on the front panel after above message. Power 5 Turn off the calibration mode. Turn off the power supply to exit the calibration mode. NOTE To re-secure the power supply (following calibration), perform this procedure again.
Calibration Procedures Calibration Security Code 1 6 Remove the short at JP5[1]. (An error occurs if not removed.) 7 Turn off and reassemble the power supply. Now you can enter a new security code. Be sure you take note of the new security code. [1] For serial MY53xx6xxx, remove the short at JP12.
1 Calibration Procedures Calibration Count Calibration Count The calibration count feature provides an independent “serialization” of your calibrations. You can determine the number of times that your power supply has been calibrated. By monitoring the calibration count, you can determine whether an unauthorized calibration has been performed. Since the value increments by one for each calibration parameter (see Table 1- 4 on the next page), a complete calibration increases the value by 5 counts.
Calibration Procedures General Calibration/Adjustment Procedure 1 General Calibration/Adjustment Procedure The calibration procedures from the front panel are described in this section. For voltage calibration, disconnect all loads from the power supply and connect a DVM across the output terminals. For current calibration, disconnect all loads from the power supply, connect an appropriate current monitoring resistor (0.
1 Calibration Procedures General Calibration/Adjustment Procedure NOTE • You can terminate any CAL SETUP without changing its calibration constants by turning off power. • Perform the voltage calibration prior to the OVP calibration and the current calibration prior to the OCP calibration. To calibrate the output voltages and currents of the power supply from the front panel, proceed as follows: 1 Unsecure the power supply.
Calibration Procedures General Calibration/Adjustment Procedure Calibrate 1 5 Calibrate DAC and select the low voltage calibration point. 30 LEFT The START BITCAL message is displayed for about 3 seconds to indicate that the power supply is ready for DAC calibration. Then it counts down numbers from 30 to 0. V LO 0.5000 V Then, the display shows the low voltage calibration point. 6 Read the DVM and change the low voltage value on the display to match the measured voltage.
1 Calibration Procedures General Calibration/Adjustment Procedure Calibrate 9 Pressing the Calibrate key saves the change and selects the high voltage calibration point. V HI 29.500 V If the entered number is within an acceptable range, a ENTERED message appears for one second. If the entered number is not correct, a MIN VALUE or MAX VALUE message appears for one second and the display shows the middle voltage calibration point again. The display now shows the high voltage calibration point.
Calibration Procedures General Calibration/Adjustment Procedure 1 Current and OCP calibration NOTE Connect an appropriate shunt (0.01 Ω) across the output terminals, and connect a digital voltmeter across the shunt resistor for the current calibration. 12 Pressing the Calibrate key saves the new calibration constants for OVP circuit and goes to the current calibration mode.
1 Calibration Procedures General Calibration/Adjustment Procedure Calibrate 15 Pressing the Calibrate key saves the change and selects the middle current calibration point. I MI 3.5000 A If the entered number is within an acceptable range, an ENTERED message appears for one second. If the entered number is not correct, a MIN VALUE or MAX VALUE message appears for one second and the display shows the low current calibration point again. The display now shows the middle current calibration point.
Calibration Procedures General Calibration/Adjustment Procedure NOTE Calibrate 1 Notice that you should wait for the DVM reading to stabilize for accurate calibration. 19 Pressing the Calibrate key saves the new calibration constants for the output current and goes to the OCP calibration mode. CAL SETUP 4 A CALIBRATING message appears for one second to indicate that the current calibration is progressing and new calibration constants of “SETUP 3” are stored.
1 Calibration Procedures Aborting a Calibration in Progress Aborting a Calibration in Progress Sometimes it may be necessary to abort a calibration after the procedure has already been initiated. You can abort a calibration at any time by turning the power supply off from the front panel. When performing a calibration from the remote interface, you can abort a calibration by issuing a remote interface device clear message or by pressing the front- panel Local key.
Calibration Procedures Calibration Record for E3632A 1 Calibration Record for E3632A Table 1-5 Calibration record for E3632A Step Calibration Description 1 Unsecure the power supply (see “To unsecure the power supply for calibration” on page 25). 2 Turn on CAL MODE (simultaneously press the Calibrate and Power keys) until it beeps. 3 Move down menu to CAL SETUP 1 (press the Calibrate key).
1 Calibration Procedures Error Messages Error Messages The following tables are abbreviated lists of error messages for the E3632A. The errors listed are the most likely errors to be encountered during calibration and adjustment. A more complete list of error messages and descriptions is contained in “Chapter 4” of the E3632A User's Guide.
Calibration Procedures Error Messages 1 Self-test error messages Table 1-7 Self-test error messages 601 Front panel does not respond 602 RAM read/write failed 603 A/D sync stuck 604 A/D slope convergence failed 605 Cannot calibrate rundown gain 606 Rundown gain out of range 607 Rundown too noisy 608 Serial configuration readback failed 609[1] System ADC test failed 624 Unable to sense line frequency 625 I/O processor does not respond 626 I/O processor failed self-test 630 Fan test
1 Calibration Procedures Error Messages Calibration error messages Table 1-8 Calibration error messages 40 Error Error message 701 Cal security disabled by jumper 702 Cal secured 703 Invalid secure code 704 Secure code too long 705 Cal aborted 708 Cal output disabled 712 Bad DAC cal data 713 Bad readback cal data 714 Bad OVP cal data 715 Bad OCP cal data 716 Bad OVP DNL error correction data 717 Cal OVP or OCP status enabled 740 Cal checksum failed, secure state 741 Cal chec
Calibration Procedures Calibration Program 1 Calibration Program This section contains an Agilent BASIC program for calibration over the GPIB interface. This program makes software adjustments to the E3632A power supply using a current shunt and a digital mutimeter which is connected to the controller. In this program a 0.01 ohm current shunt is used.
1 42 Calibration Procedures Calibration Program 330 340 350 360 IF A=1 THEN PRINT TABXY(5,5),"****** Unable to Unsecure the Power supply ******" GOTO 2290 END IF 370 380 390 400 410 420 430 440 450 460 470 480 490 500 510 520 530 540 550 560 570 580 590 600 610 620 630 640 650 660 670 680 690 700 710 720 730 740 750 760 770 780 790 ! ! Perform the DAC error correction, voltage calibration and OVP calibration. ! Alert the operator to hook up the connection before calibrating.
Calibration Procedures Calibration Program 800 810 820 830 840 850 860 870 WAIT 4 OUTPUT @Pwrsupply;"OUTPUT ON" CLEAR SCREEN OUTPUT @Pwrsupply;"CAL:VOLT:LEV MIN" WAIT 2 OUTPUT @Dmm;"MEAS:VOLT:DC?" ENTER @Dmm;Dmm_rdg PRINT Dmm_rdg 880 890 900 910 920 930 940 950 960 970 980 990 1000 1010 1020 1030 1040 1050 1060 1070 1080 1090 1100 1110 1120 1130 1140 1150 1160 1170 1180 1190 1200 1210 1220 1230 1240 1250 OUTPUT @Pwrsupply;"CAL:VOLT:DATA ";Dmm_rdg ! send stored value to Power Supply OUTPUT @Pwrsupply;"CA
1 44 Calibration Procedures Calibration Program 1260 1270 1280 1290 1300 1310 1320 1330 1340 1350 1360 1370 ! ! Check to see if there is an error. If there is an error, ! display the error and exit the program.
Calibration Procedures Calibration Program 1720 1730 1740 1750 1760 1770 1780 1790 1800 1810 1820 1830 1840 1850 OUTPUT @Pwrsupply;"CAL:CURR:DATA ";Dmm_rdg ! send stored value to Power Supply OUTPUT @Pwrsupply;"CAL:CURR:LEVel MAX" ! set output to maximum cal value WAIT 2 ! allow output to settle OUTPUT @Dmm;"MEAS:VOLT:DC?" ! measure output with Dmm and ENTER @Dmm;Dmm_rdg ! store in variable Dmm_rdg Dmm_rdg=Dmm_rdg/Current_shunt ! scale reading to amps PRINT Dmm_rdg OUTPUT @Pwrsupply;"CAL:CURR:DATA ";Dmm_r
1 Calibration Procedures Calibration Program 2190 2200 2210 2220 2230 2240 2250 2260 2270 2280 2290 46 PRINT TABXY(10,5),"CURRENT/OCP CALIBRATION COMPLETE" ! ! Create a time stamp and output to power supply ! Cal_msg$="Last Calibrated "&DATE$(TIMEDATE)&" "&TIME$(TIMEDATE) OUTPUT @Pwrsupply;"CAL:STR """;Cal_msg$;"""" OUTPUT @Pwrsupply;"CAL:SEC:STAT ON, ";Sec_code$ OUTPUT @Pwrsupply;"VOLT:PROT:STAT ON" OUTPUT @Pwrsupply;"CURR:PROT:STAT ON" DISP "Calibration terminated.
E3632A DC Power Supply Service Guide 2 Service Operating Checklist 48 Types of Service Available 49 Repacking for Shipment 50 Electrostatic Discharge (ESD) Precautions 51 Surface Mount Repair 51 To Replace the Power-Line Fuse 52 To Disconnect the Output Using an External Relay 52 Troubleshooting Hints 54 Self-Test Procedures 57 Component Locator Diagram 61 This chapter contains procedures for returning a failed power supply to Agilent for service or repair.
2 Service Operating Checklist Operating Checklist Before returning your power supply to Agilent for service or repair check the following items: Is the power supply inoperative? • Verify that the AC power cord is connected to the power supply. • Verify that the front- panel power switch is depressed. • Verify that the power- line fuse is installed: • Use the 4 AT, 250 V fuse for 100 Vac or 115 Vac operation. • Use the 2.5 AT, 250 V fuse for 230 Vac operation. • Verify the power- line voltage setting.
Service Types of Service Available 2 Types of Service Available If your power supply fails within three years of original purchase, Agilent will repair or replace it free of charge. If your unit fails after your three year’s warranty expires, Agilent will repair or replace it at a very competitive price. Agilent will make the decision locally whether to repair or replace your unit. Standard repair service (worldwide) Contact your nearest Agilent Service Center.
2 Service Repacking for Shipment Repacking for Shipment For the Express Exchange Service described on the previous page, return your failed Agilent E3632A to the designated Agilent Service Center using the shipping carton of the exchange unit. A shipping label will be supplied. Agilent will notify you when your failed unit has been received.
Service Electrostatic Discharge (ESD) Precautions 2 Electrostatic Discharge (ESD) Precautions Almost all electrical components can be damaged by electrostatic discharge (ESD) during handling. Component damage can occur at electrostatic discharge voltages as low as 50 V. The following guidelines will help prevent ESD damage when serving the power supply or any electronic device. • Disassemble instruments only in a static- free work area. • Use a conductive work area to dissipate static charge.
2 Service To Replace the Power-Line Fuse To Replace the Power-Line Fuse The power- line fuse is located within the power supply's fuse- holder assembly on the rear panel (refer to the E3632A User’s Guide). For 100 Vac or 115 Vac operation, you must use a 4 AT slow- blow fuse (Agilent part number 2110- 0996). For 230 Vac operation, you must use a 2.5 AT slow- blow fuse (Agilent part number 2110- 0999).
Service To Disconnect the Output Using an External Relay 2 Installation procedure for an external relay The assembly drawings are located in “Component Locator Diagram” on page 61. 1 Remove the front and rear bumpers and take off the cover. 2 Install JP3[1] and JP4[1] located adjacent to the connector P5 (refer to “Component locator diagram for the main board assembly — top” on page 61). A bare wire may be used. 3 Reassemble the power supply.
2 Service Troubleshooting Hints Troubleshooting Hints This section provides a brief check list of common failures. Before troubleshooting or repairing the power supply, make sure that the failure is in the instrument rather than any external connections. Also make sure that the instrument is accurately calibrated. The power supply's circuits allow troubleshooting and repair with basic equipment such as a digital multimeter and a 100 MHz oscilloscope.
Service Troubleshooting Hints 2 Unit reports errors 740 to 750 These errors may be produced if you accidentally turn off power the unit during a calibration or while changing a non- volatile state of the instrument. Recalibration or resetting the state should clear the error. If the error persists, a hardware failure may have occurred. Unit fails self-test Verify that the correct power- line voltage setting is selected.
2 Service Troubleshooting Hints Table 2-2 Bias supplies voltages (serial MY53xx6xxx) Bias supply Minimum Maximum Check at +3.3 V Floating +3.135 V +3.465 V U23 pin 3 +15 V Floating +14.25 V +15.75 V Anode of CR7 –15 V Floating –14.25 V –15.75 V Cathode of CR23 Some circuits produce their own local bias supplies from the main bias supplies. Be sure to check that these local bias supplies are active.
Service Self-Test Procedures 2 Self-Test Procedures Power-on self-test Each time the power supply is powered on, a set of self- tests are performed. These tests check that the minimum set of logic and measurement hardware are functioning properly. The power- on self- test performs checks, which covers from 601 through 604 and 624 through 634. For serial MY53xx6xxx, the power- on self- test utilize the complete self- test, which covers from error codes 601 through 632.
2 Service Self-Test Procedures Table 2-3 Self-test error messages (continued) 604 A/D slope convergence failed The input amplifier is configured to the measure zero (MZ) state in the 10 V range. This test checks whether the ADC integrator produces nominally the same number of positive and negative slope decisions (±10%) during a 20 ms interval. 605 Cannot calibrate rundown gain This test checks the nominal gain between integrating ADC and the U17 on-chip ADC.
Service Self-Test Procedures 2 Table 2-3 Self-test error messages (continued) 631 System DAC test failed This test checks if the DAC hardware is functional. The main controller U17 (U10 for serial MY53xx6xxx) sends a reference voltage data to DAC and converts the DAC output to digital data to see if the digital data is within a valid range. 632 Hardware test failed This test checks the status of voltage and current error amplifiers for the power circuit of output1.
2 Service Self-Test Procedures THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.
Service Component Locator Diagram 2 Component Locator Diagram Component locator diagram for the main board assembly — top E3632A Service Guide 61
2 Service Component Locator Diagram Component locator diagram for the front panel — top 62 E3632A Service Guide
Service Component Locator Diagram 2 Component locator diagram for the main board assembly — top (serial MY53xx6xxx) E3632A Service Guide 63
2 Service Component Locator Diagram Component locator diagram for the front panel — top (serial MY53xx6xxx) 64 E3632A Service Guide
www.agilent.
