Agilent Technologies 6015A, 6010a, 6011A Troubleshooting Resistance and Voltage Programming, 107

Page 107

Troubleshooting

Before attempting to troubleshoot the 002 Option Board, ensure that the fault is with the option itself and not with the main power supply. This can be accomplished by removing the top cover, inside cover and disconnecting the two ribbon cables from the A2 Control board and checking the operation of the main supply. Otherwise troubleshoot the option board as described in the following paragraphs.

Removal of the Option Board. To facilitate troubleshooting the 002 Option the board can be removed from the power supply and electrically connected via the ribbon cables from Service Kit's 06033-60005 or 5060-2665. To remove the circuit board proceed as follows:

a.Turn off power supply and disconnect line cord.

b.Disconnect option I/O cable from J3 on rear panel and remove the two screws that secure option board to rear panel.

c.Disconnect the ribbon cables from the A2 Control board.

d.Remove option board by lifting the board by the front edge and sliding the board toward the front of the power supply.

e.Reconnect the option board to the A2 Control board using the extended ribbon cables from the Service Kit, and pace the option board on an insulated surface next to the power supply.

f.Be careful that the option board lies securely on insulating material and does not touch any part of the main power supply.

Isolating Faulty Circuit. If it is apparent which function is not operating properly, proceed to the appropriate paragraph. If the problem involves more than one function, check the bias voltages from connectors J1 and J2 and the ± 11.8V on the option board.

Troubleshooting Resistance and Voltage Programming

a.Confirm that the problem is on the option board by disconnecting the ribbon cables from the A2 Control Board and attempting to program the supply via the rear panel terminal strip.

b.Check ± 15V and ± 11.8V supplies.

c.Check for a problem in the programming protection circuit. This circuit should draw about 2∝A from the programming lines.

d.Check that W3 and W4 are installed and S1 is in proper position .

Troubleshooting Current Programming

a.Check ± 15V and ± 11.8V supplies.

b.Proceed to test set-up shown in Figure A-11 and/or A-12.

c.Put S1 in V, R position and see if varying the 0-20V voltage source produces a 0-5 volt DC level across R44 or R39. If not, check op-amps and associated circuitry.

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Contents Autoranging DC Power Supply Agilent Models 6010A, 6011A Certification Safety Summary Safety Symbol Definitions Table of Contents Replaceable Parts Scope TroubleshootingCircuit Diagrams Safety ConsiderationsItem Description Manual RevisionsOperation Verification Tests Calibration ProcedureIntroduction Test Equipment RequiredTest Equipment Required Type Required Characteristics USE Recommended Model4KVA Calibration Procedure Initial SetupMON Iout Display SettingsVout Common Mode Setup CR4 Performance TestsMeasurement Techniques Current-Monitoring Resistor Setup Constant Voltage CV Tests Basic Test SetupPage RMS Measurement Test Setup, CV Pard Test Peak-To-Peak Measurement Test Setup, CV Pard Test 6012B 6015A 6010A 6011ANot Applicable 6010A 6011A 6012B 6015A Load Transient Recovery WaveformConstant Current CC Tests Page CC Pard Test Setup Initial Troubleshooting Procedures TroubleshootingVdc Control Board Test Connector, A2J7Electrostatic Protection Repair and ReplacementA4 FET Board Removal A2 Control Board RemovalA1 Main Board Removal A5 Diode Board RemovalA3 Front Panel Board Removal A3 Front Panel Assembly Rear View Overall Troubleshooting ProcedureA1 Designator Wire color A3S1 Position Rear View Main Troubleshooting Setup Using the TablesMain Troubleshooting Setup Modified Mains Cord Set For Troubleshooting Front Panel Troubleshooting Troubleshooting No-Output FailuresA2J7-26 A2J7-25 Performance Failure Symptoms Troubleshooting Bias SuppliesA3 Front Panel Board Failure Symptoms Node + N0DE Node +Troubleshooting AC-Turn-on Circuits Power Section Blocks+ OUT Troubleshooting PWM & ClockAC Fault Relay EnablePWM-OFF Troubleshooting DC-To-DC ConverterTroubleshooting Down Programmer PWM-ONWaveforms OFF Troubleshooting CV CircuitTroubleshooting CC Circuit ON/OFFSET Voltage Setup Measurement Troubleshooting OVP CircuitPage System Description Autoranging PowerOverview Regulation & Control Subsystem A and 6015A Simplified Schematic A and 6012B Simplified Schematic Input from Output to Quick Reference Guide to Major Circuits Major FunctionOperation DP PWM PWM DPProtection Subsystem Input Power SubsystemFront Panel Board DC Power Conversion SubsystemOutput Subsystem Page Simplified Front Panel Schematic Reference Designators Replaceable PartsDescription Abbreviations Ordering InformationMain Board Assembly CR5 CB1CR1 CR2A1 Mechanical VR16010A C37 6010A, 6011A, 6015A Not Used Not Used Not Used Page Not Used VR6 VR2VR5 TB2 TB1Not Used Agilent Model VR1 VR2Drvr TTL NOR Dual TS1FET N-CHAN CR3CR6 A5 Mechanical A6 Mechanical Chassis Electrical Not Used Schematic Diagram Notes Component Location and Circuit DiagramsIndicate number of paths represented by the line Top View, Top Covers Removed Main Board A1 and Filter Board A6 Component Location Control Board A2 Component Location Front Panel Board A3 Component Location FET Board A4 Component Location Diode Board A5 Component Location Page Page Page Page Option 002 Hardware SpecificationsGeneral Information Accuracy Table A-1. Specifications, Option Remote ProgrammingInput Compliance Voltage ± Current Programming Enable Status IndicatorsOn State logic low Remote Trip and Remote Reset TimingPower-on Preset Maximum Output Voltage logic high +Pard Typical Table A-1. Specifications, Option Pulse TimingBias Supplies DC Output Ratings 25C ± Short Circuit Output CurrentConnector Assembly Procedure InstallationOperation Figure A-1. Mating Connector AssemblyLocal/Remote Programming Resistance Voltage or Current Figure A-4. Calculating Value of Series Dropping Resistor Remote Resistance ProgrammingFigure A-5. Remote Resistance Programming 101 Remote Monitoring102 Status IndicatorsRemote Control 103 Remote ResetOvervoltage 104 Power-On Preset105 AC Dropout Buffer CircuitMultiple Supply System Shutdown 106 MaintenanceBias Supplies 107 Troubleshooting Resistance and Voltage ProgrammingTroubleshooting Current Programming 108 Figure A-11. Troubleshooting Current Programming of CV Mode109 Figure A-13. Troubleshooting Status Indicators110 111 Table A-3. Replacement Parts112 113 VR9114 Logic Symbols and DefinitionsIndicator and Qualifier Symbols 115 Schematic Diagram NotesFigure A-15. Option 002 Board, Component Location 116 Schematic NotesFigure A-16. Option 002 Board, Schematic Diagram 117 Page 119 Model 6010A ChangeModel 6011A Change 120 Model 6012B ChangeModel 6015A Change 121 Delete122 123 124 125 DS5126
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6015A, 6012B, 6011A, 6010a specifications

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