Keysight E3632A Service Manual
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Keysight E3632A Service Manual

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Keysight E3632A

DC Power Supply

Service Guide

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Summary of Contents for Keysight E3632A

  • Page 1: Dc Power Supply

    Keysight E3632A DC Power Supply Service Guide...

  • Page 2: Copyright Notice

    Conformity. understood and met. where in the EULA. Keysight shall be under no obligation to update, revise or otherwise modify the Software. With WARNING respect to any technical data as defined by FAR 2.101, pursuant to FAR...

  • Page 3: Safety Symbols

    Out position of a bi-stable push control Terminal is at earth potential. Used for measurement and control circuits In position of a bi-stable push control designed to be operated with one terminal at earth potential. Positive binding post Negative binding post Keysight E3632A Service Guide...

  • Page 4: Safety Considerations

    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. Keysight Technologies assumes no liability for the customer’s failure to comply with these requirements.
  • Page 5 – When servicing the device, use only the specified replacement parts. – Do not install substitute parts or perform any unauthorized modification to the device. Return the device to Keysight for service and repair to ensure that the safety features are maintained.

  • Page 6: Environmental Conditions

    Operating condition – 0 °C to 40 °C Temperature Storage condition – –20 °C to 70 °C Humid ity Up to 80% RH Al titude Up to 2000 m Installation category II (for indoor use) Pollution degree Keysight E3632A Service Guide...

  • Page 7: Regulatory Markings

    NMB-001 du Canada. environment outside of the home. 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. Keysight E3632A Service Guide...

  • Page 8: Waste Electrical And Electronic Equipment (Weee) Directive

    To return this unwanted instrument, contact your nearest Keysight Service Center, or visit http://about.keysight.com/en/companyinfo/environment/takeback.shtml for more information. Sales and Technical Support To contact Keysight for sales and technical support, refer to the support links on the following Keysight websites: – www.keysight.com/find/powersupply (product-specific information and support, software and documentation updates) –...

  • Page 9: Table Of Contents

    ........29 Normal mode voltage noise (CV ripple and noise) ....29 Keysight E3631A Service Guide...
  • Page 10 ....... .36 Performance Test Record for E3632A ......37 CV performance test record .
  • Page 11 .........74 Keysight E3631A Service Guide...
  • Page 12 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight E3631A Service Guide...
  • Page 13 ....25 Figure 1-2 Transient response time ......31 Keysight E3631A Service Guide...
  • Page 14 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight E3631A Service Guide...
  • Page 15 ..... .43 Table 1-5 Calibration record for E3632A ....50...
  • Page 16 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight E3631A Service Guide...

  • Page 17: Calibration Procedures

    Keysight E3632A DC Power Supply Service Guide Calibration Procedures Closed-Case Electronic Calibration Keysight Calibration Services Calibration Interval Automating Calibration Procedures Recommended Test Equipment Test Considerations Performance Verification Tests Measurement Techniques Constant Voltage (CV) Verifications Constant Current (CC) Verifications Common Mode Current Noise...

  • Page 18: Closed-Case Electronic Calibration

    Keysight Calibration Services When your power supply is due for calibration, contact your local Keysight Service Center for a low-cost calibration. The Keysight E3632A power supply is supported on calibration processes which allow Keysight to provide this service at competitive prices.

  • Page 19: Automating Calibration Procedures

    The power supply must be unsecured prior to initiating the calibration procedure. A Keysight BASIC program for calibration over the GPIB interface is listed at the end of this chapter.

  • Page 20: Recommended Test Equipment

    Open and Short Switches response time. Transient On/Off 2.1 Ω, 200 W Resistive loads (R Measure ripple and noise. 7.5 Ω, 200 W Current monitoring resistor 0.01 Ω, 0.01% Constant current test setup. (shunt) Keysight E3632A Service Guide...

  • Page 21: 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.

  • Page 22: Performance Verification Tests

    Calibration Procedures 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: – Sel f-test A series of internal verification tests that provides high confidence that the power supply is operational.

  • Page 23: 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. Figure 1-1 Performance verification test setup Keysight E3632A Service Guide...

  • Page 24: Electronic Load

    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. Complete instructions on front panel and remote programming are given in the E3632A User's Guide. Keysight E3632A Service Guide...

  • Page 25: 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? Keysight E3632A Service Guide...

  • Page 26: Cv Load Regulation

    The difference between the digital voltmeter readings in steps 3 and 4 is the CV load regulation. The difference of the readings during the immediate change should be within the limit of 5 mV. Keysight E3632A Service Guide...

  • Page 27: Cv Line Regulation

    1 Turn off the power supply and connect the output to be tested as shown in Figure 1-1 to an oscilloscope (AC coupled) between (+) and (–) terminals. Set the oscilloscope to AC mode and bandwidth limit to 20 MHz. Connect a resistive load (7.5 Ω) as shown in Figure 1-1. Keysight E3632A Service Guide...
  • Page 28 4 Note that the waveform on the oscilloscope does not exceed the peak-to-peak limit of 2 mV. 5 Disconnect the oscilloscope and connect an AC RMS voltmeter in its place. The rms voltage reading does not exceed the rms limit of 0.35 mV. Keysight E3632A Service Guide...

  • Page 29: Load Transient Response Time

    5 Adjust the the oscilloscope to display transients as shown in Figure 1-2. Note that the pulse width (t2–t1) of the transients at 15 mV from the base line is no more than 50 msec for the output. Figure 1-2 Transient response time Keysight E3632A Service Guide...

  • Page 30: Constant Current (Cc) Verifications

    ). 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: Keysight E3632A Service Guide...

  • Page 31: Cc Load Regulation

    The difference between the current readings in step 3 and 4 is the load regulation current. The Keysight E3632A Service Guide...

  • Page 32: Cc Line Regulation

    The difference between the current readings in step 5 and 6 is the load regulation current. The difference of the readings during the immediate change should be within the limit of 0.95 mA. Keysight E3632A Service Guide...

  • Page 33: Normal Mode Current Noise (Cc Ripple And Noise)

    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. Keysight E3632A Service Guide...

  • Page 34: Common Mode Current Noise

    (15.0 V and 7.0 A). 4 Record the voltage across R and convert it to current by dividing by the resistance (DVM reading/100 KΩ). Note that the current is less than 1.5 μA. Keysight E3632A Service Guide...

  • Page 35: Performance Test Record For E3632A

    Calibration Procedures Performance Test Record for E3632A CV performance test record Table 1-2 CV performance test record Actual Test description Specifications resul t Upper limit Lower limit CV programming accuracy @ 0 volts +0.0100 V –0.0100 V (DVM reading) CV readback accuracy @ 0 volts DVM + 0.0050 V...

  • Page 36: Cc Performance Test Record

    + 0.0155 A – 0.0155 A CC readback accuracy @ full scale CC load regulation Maximum change: <0.95 mA CC line regulation Maximum change: <0.95 mA CC ripple/noise <2 mA Common mode current noise <1.5 μArms Keysight E3632A Service Guide...

  • Page 37: Calibration Security Code

    – If you forget your security code, you can disable the security feature by adding a jumper inside the power supply, and then entering a new code. Refer to unsecure the power supply without the security code. Keysight E3632A Service Guide...

  • Page 38: To Unsecure The Power Supply For Calibration

    The CAL MODE message is displayed on the front panel after above message. 5 Turn off the calibration mode. Turn off the power supply to exit the calibration mode. Keysight E3632A Service Guide...

  • Page 39: To Unsecure The Power Supply Without The Security Code

    [1] For serial MY53xx6xxx, apply the short at JP12 (located near U36). Refer to “Component locator diagram for the main board assembly — top (serial MY53xx6xxx)” on page 73. [2] For serial MY53xx6xxx, remove the short at JP12. Keysight E3632A Service Guide...

  • Page 40: Calibration Count

    You can record and read information in the calibration message from the remote interface only. The calibration message may contain up to 40 characters. The calibration message is stored in non-volatile memory and does not change when power has been off or after a remote interface reset. Keysight E3632A Service Guide...

  • Page 41: General Calibration/Adjustment Procedure

    – You can terminate any CAL SETUP without changing its calibration constants NOTE by turning off power. – Perform the voltage calibration prior to the OVP calibration and the current calibration prior to the OCP calibration. Keysight E3632A Service Guide...

  • Page 42: Voltage And Ovp Calibration

    6 Read the DVM and change the low voltage value on the display to match the measured voltage. For example, if the DVM reading is 0.4500 V, adjust the voltage to 0.4500 V using the knob and resolution selection keys. Keysight E3632A Service Guide...
  • Page 43 A CALIBRATING message appears for one second to indicate that the voltage calibration is progressing and new voltage calibration constants of “SETUP 1” are stored. Then, the display shows above message to indicate that the power supply is ready for the OVP calibration. Keysight E3632A Service Guide...

  • Page 44: Current And Ocp Calibration

    I LO +0.1990 A Notice that you should wait for the DVM reading to stabilize for accurate NOTE calibration. 15 Pressing the Calibrate key saves the change and selects the middle current calibration point. Keysight E3632A Service Guide...
  • Page 45 For example, if the computed value is 6.899 A, adjust the current to 6.899 A using the knob and arrow keys. I HI 6.8990 A Notice that you should wait for the DVM reading to stabilize for accurate NOTE calibration. Keysight E3632A Service Guide...
  • Page 46 A CALIBRATING message appears for several seconds to indicate that the OCP calibration is progressing and new OCP calibration constants of “SETUP 4” are stored. Then the display will return to the calibration mode. 21 Turn off the power supply to exit the calibration mode. Keysight E3632A Service Guide...

  • Page 47: Aborting A Calibration In Progress

    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. Keysight E3632A Service Guide...

  • Page 48: Calibration Record For E3632A

    Calibration Procedures Calibration Record for E3632A Table 1-5 Calibration record for E3632A Measurement Supply Being Step Calibration Description Mode (DVM) Ad justed Unsecure the power supply (see “To unsecure the power supply for calibration” on page 40). Turn on CAL MODE (simultaneously press the Calibrate and Power keys) until it beeps.

  • Page 49: Error Messages

    Calibration Procedures 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”...

  • Page 50: Self-Test Error Messages

    System ADC test failed Unable to sense line frequency I/O processor does not respond I/O processor failed self-test Fan test failed System DAC test failed Hardware test failed [a] This error message is only applicable for serial MY53xx6xxx. Keysight E3632A Service Guide...

  • Page 51: Calibration Error Messages

    Cal checksum failed, store/recall data in location 3 Cal checksum failed, DAC cal constants Cal checksum failed, readback cal constants Cal checksum failed, GPIB address Cal checksum failed, internal data Cal checksum failed, DAC DNL error correction data Keysight E3632A Service Guide...

  • Page 52: Calibration Program

    “Current_shunt” to the value of the current shunt used and the GPIB address for the power supply and the digital voltmeter. ! This program was written on a PC with Keysight Basic for Windows. ! It will make software adjustments to the E3632A Power Supply ! on the GPIB bus using a Keysight 34401A Digital Multimeter and a ! current shunt.
  • Page 53 Calibration Procedures PRINT TABXY(10,11)," Prepare for E3632A DAC DNL error correction and" PRINT TABXY(10,12)," Voltage/OVP calibration. Connect the output to the DMM." PRINT TABXY(10,13)," Observe Polarity!" PRINT TABXY(10,14),"*********************************************************" PRINT TABXY(10,16),"Press 'C' to Continue, 'I' to go to CURRENT calibration or"...
  • Page 54 ! Alert operator to connect lead 1460 PRINT TABXY(10,10),"*********************************************************" 1470 PRINT TABXY(10,11)," Connect a CURRENT SHUNT to the Dmm input for measuring" 1480 PRINT TABXY(10,12)," current. Connect the output to the shunt. Observe Polarity!" 1490 PRINT Keysight E3632A Service Guide...
  • Page 55 1950 CLEAR SCREEN 1960 PRINT TABXY(10,5),"CURRENT CALIBRATION COMPLETE" 1970 PRINT TABXY(10,7),"BEGIN OCP CALIBRATION" 1980 WAIT 4 1990 CLEAR SCREEN 2000 OUTPUT @Pwrsupply;"OUTP ON" ! Turn on Power Supply output 2010 OUTPUT @Pwrsupply;"CAL:CURR:PROT" ! Perform OCP calibration Keysight E3632A Service Guide...
  • Page 56 ! Create a time stamp and output to power supply 2220 2230 Cal_msg$="Last Calibrated "&DATE$(TIMEDATE)&" "&TIME$(TIMEDATE) 2240 OUTPUT @Pwrsupply;"CAL:STR """;Cal_msg$;"""" 2250 OUTPUT @Pwrsupply;"CAL:SEC:STAT ON, ";Sec_code$ 2260 OUTPUT @Pwrsupply;"VOLT:PROT:STAT ON" 2270 OUTPUT @Pwrsupply;"CURR:PROT:STAT ON" 2280 DISP "Calibration terminated. " 2290 Keysight E3632A Service Guide...

  • Page 57: Service

    Electrostatic Discharge (ESD) Precautions Surface Mount Repair To Replace the Power-Line Fuse To Disconnect the Output Using an External Relay Troubleshooting Hints Self-Test Procedures Component Locator Diagram This chapter contains procedures for returning a failed power supply to Keysight for service or repair.

  • Page 58: Operating Checklist

    Service Operating Checklist Before returning your power supply to Keysight 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.

  • Page 59: Types Of Service Available

    If the instrument is to be shipped to Keysight for service or repair, be sure to: – Attach a tag to the power supply identifying the owner and indicating the required service or repair.

  • Page 60: Electrostatic Discharge (Esd) Precautions

    Surface mount components should only be removed using soldering irons or desoldering stations expressly designed for surface mount components. Use of conventional solder removal equipment will almost always result in NOTE permanent damage to the printed circuit board and will void your Keysight factory warranty. Keysight E3632A Service Guide...

  • Page 61: 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 (Keysight part number 2110-0996).

  • Page 62: Installation Procedure For An External Relay

    3 Reassemble the power supply. [1] For serial MY53xx6xxx, install JP751 and JP752 located adjacent to the connector CN751 (refer to “Component locator diagram for the main board assembly — top (serial MY53xx6xxx)” on page 73 on page 63) Keysight E3632A Service Guide...

  • Page 63: Troubleshooting Hints

    – Use the 2.5 AT, 250 V fuse for 230 Vac operation.. – Verify the power-line voltage setting. – Refer to the E3632A User’s Guide 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.

  • Page 64: Bias Supplies Problems

    Always check that the power supplies are free of AC oscillations using an oscilloscope. Failure of bias supplies will cause many self-test failures. [1] For serial MY53xx6xxx, failure of the DAC U36 on the top board will cause many self-test failures. Keysight E3632A Service Guide...

  • Page 65: Self-Test Procedures

    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. Keysight E3632A Service Guide...
  • Page 66 This test checks if the fan current is flowing. If the current is not detected at power-on self-test, the power supply will beep and the error annunciator will be on. Fan test fail could likely induce overtemperature condition in the power supply. Keysight E3632A Service Guide...
  • Page 67 This test checks the status of voltage and current error amplifiers for the power circuit of output1. If both amplifiers are not operational, the power supply will beep and the error annunciator will be lit on. [a] This error message is only applicable for serial MY53xx6xxx. Keysight E3632A Service Guide...
  • Page 68 Service Keysight E3632A Service Guide...

  • Page 69: Component Locator Diagram

    Component Locator Diagram Component locator diagram for the main board assembly — top Keysight E3632A Service Guide...

  • Page 70: Component Locator Diagram For The Front Panel - Top

    Component locator diagram for the front panel — top Keysight E3632A Service Guide...

  • Page 71: Component Locator Diagram For The Main Board Assembly - Top (Serial My53Xx6Xxx)

    Component locator diagram for the main board assembly — top (serial MY53xx6xxx) Keysight E3632A Service Guide...

  • Page 72: Component Locator Diagram For The Front Panel - Top (Serial My53Xx6Xxx)

    Component locator diagram for the front panel — top (serial MY53xx6xxx) Keysight E3632A Service Guide...
  • Page 73 This information is subject to change without notice. Always refer to the Keysight website for the latest revision. © Keysight Technologies 1997 - 2019 Edition 9, March 2019 Printed in Malaysia *E3632-90010* E3632-90010 www.keysight.com...

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