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Agilent Technologies 6632B Disassembly Procedures, List of Required Tools, 2.Component Location

Models: 6632B 6633B 66332A 6634B

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Disassembly Procedures

Troubleshooting - 3

Disassembly Procedures

The following paragraphs provide instructions on how to disassemble various components of the dc power supply. Once disassembled, the components can be reassembled by performing the disassembly instructions in reverse order. Figure 3-2 shows the location of the major components of the unit.

	Figure 3-2. Component Location

WARNING:	SHOCK HAZARD. To avoid the possibility of personal injury, turn off AC power and
	disconnect the line cord before removing the top cover. Disconnect the GPIB cable and any loads,
	and remote sense leads before attempting disassembly.


CAUTION:	Most of the attaching hardware is metric. Use of other types of fasteners will damage threaded
	inserts. Refer to the list of required tools when performing disassembly and replacement.

List of Required Tools

a.2PT Pozidriv screwdrivers.

b.T10 and T15 Torx screwdrivers.

c.Hex drivers: 7 mm for GPIB connector, 3/16" for RS-232 connector, 1/4" for front panel binding posts

d.Long nose pliers.

e.Antistatic wrist discharge strap.

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Agilent Technologies 6632B, 6634B Disassembly Procedures, List of Required Tools, 2.Component Location, Troubleshooting

Contents

and Agilent Model 6632B, 6633B, 6634B System DC Power SupplyAgilent Model 66332A Dynamic Measurement DC SourceCERTIFICATION Warranty InformationWARRANTY LIMITATION OF WARRANTYSAFETY SYMBOLS Safety SummaryBEFORE APPLYING POWER DO NOT SERVICE OR ADJUST ALONESymbol Safety Symbol DefinitionsDescription Instrument Identification Printing HistoryVERIFICATION AND PERFORMANCE TESTS Table of ContentsTROUBLESHOOTING INTRODUCTIONINDEX REPLACEABLE PARTS LISTDIAGRAMS PRINCIPLES OF OPERATIONPage Related Documents Safety ConsiderationsIntroduction OrganizationFirmware Revisions RevisionsElectrostatic Discharge Manual RevisionsIntroduction Verification and Performance TestsTest Equipment Required 2 - Verification and Performance Tests Test SetupFigure 2-1.Test Setup Measurement TechniquesCurrent-MonitoringResistor Operation Verification TestsPerformance Tests Electronic LoadCV Load Effect CV SetupConstant Voltage CV Tests Voltage Programming and Readback AccuracyCV Noise PARD CV Source EffectVerification and Performance Tests Current Programming and Readback Accuracy Transient Recovery TimeCC Setup Constant Current CC TestsVerification and Performance Tests Current Sink -CCOperationLow Range Current Readback Accuracy CC Load and Line RegulationCC Source Effect CC Load Effect2 - Verification and Performance Tests CC Noise PARD Performance Test Equipment FormVerification and Performance Tests 2 - Verification and Performance Tests Performance Test Record FormsVerification and Performance Tests 2 - Verification and Performance Tests Introduction TroubleshootingTest Equipment Required Overall TroubleshootingFlow Charts 3 - TroubleshootingFigure 3-1Sheet 1. Main Flowchart Troubleshooting3 - Troubleshooting Figure 3-1Sheet 2. Main Flowchart continuedTroubleshooting Figure 3-1Sheet 3. Main Flowchart continued3 - Troubleshooting Figure 3-1Sheet 4. OV at Turn-OnTroubleshooting Figure 3-1Sheet 5. OV at Turn-Oncontinued3 - Troubleshooting Figure 3-1Sheet 6. FS Indicated but Fuse OKTroubleshooting Figure 3-1Sheet 7. No Output Voltage3 - Troubleshooting Figure 3-1Sheet 8. No Output Voltage continuedTroubleshooting Figure 3-1Sheet 9 No Output Voltage continued3 - Troubleshooting Figure 3-1Sheet 10. No Current LimitTroubleshooting Figure 3-1Sheet 11. Unit Does Not OV3 - Troubleshooting Figure 3-1Sheet 12. High Output VoltageTroubleshooting Specific Troubleshooting ProceduresPower-on Self-testFailures Table 3-2. Self-TestError Codes/Messages3 - Troubleshooting CV/CC Status Annunciators TroubleshootingBias and Rail Voltages Table 3-3.Bias and Reference VoltagesTroubleshooting J307 Voltage MeasurementsManual Fan Speed Control Disabling Protection Features3 - Troubleshooting Troubleshooting Inhibit Calibration SwitchCalibration Password Post-repairCalibrationIdentifying the Firmware ROM UpgradeUpgrade Procedure InitializationTroubleshooting Disassembly ProceduresList of Required Tools Figure 3-2.Component Location3 - Troubleshooting Cover, Removal and ReplacementA2 Interface Board, Removal and Replacement Front Panel Assembly, Removal and ReplacementA1 Main Control Board S1 Line Switch, Removal and ReplacementA3 Front Panel Board, Removal and Replacement T1 Power Transformer, Removal and ReplacementFigure 3-3.Transformer Wiring Line Voltage Wiring3 - Troubleshooting Introduction I/O Interface SignalsTable 4-1.Power Supply Interface signals Principles of OperationSecondary Interface A3 Front Panel CircuitsA2 Interface Circuits Primary InterfacePrinciples of Operation Figure 4-1.A2/A3 Block DiagramA1 Main Board Circuits Power Circuits4 - Principles of Operation Principles of Operation Figure 4-2.A1 Block Diagram4 - Principles of Operation Control CircuitsPrinciples of Operation Page Table 5-1.Chassis, Electrical Replaceable Parts ListIntroduction Table 5-2.Chassis, Mechanical 5 - Replaceable PartsFigure 5-1.Mechanical Parts ldentification Replaceable Parts5 - Replaceable Parts Table 5-3.A1 Control Board PC Board AssemblyReplaceable Parts - 5 - Replaceable Parts Replaceable Parts 5 - Replaceable Parts Replaceable Parts 5 - Replaceable Parts Replaceable Parts 5 - Replaceable Parts Replaceable Parts 5 - Replaceable Parts Replaceable Parts 5 - Replaceable Parts Table 5-4.Binding Post Option #020Table 5-5.A5 AC input/RFI Board Table 5-6.Relay Option #760Introduction DiagramsGeneral Schematic Notes Table 6-1. Model-dependentComponentsTable 6-1. Model-dependentComponents continued 6 - DiagramsTable 6-2.A1 Board Component Locations Diagrams6 - Diagrams Table 6-2continuedFigure 6-1.A1 Board Component Locations Figure 6-2.A4 and A6 Board Component Locations Figure 6-3.A1 Board schematic sheet A1 Board schematic sheet A1 Board schematic sheet Figure 6-4.A6 Relay Option Board schematic Index