Manuals / Agilent Technologies / Home Audio / Stereo System

Agilent Technologies 6632B, 6634B, 66332A, 6633B 1Sheet 7. No Output Voltage, Troubleshooting

Models: 6632B 6633B 66332A 6634B

1 82

Download 82 pages 25.5 Kb

Page 31

Image 31

Program full scale voltage and current and enable output.

Measure output voltage with an external voltmeter.

Display zero V but

output OK?

CV or CC

Annunciator on?

Troubleshooting - 3

		Check W7 (Vmon) and
Yes		Check W7 (Vmon) and
		A2, Interface board
		A2, Interface board

	CC?		Displays current		Check for short across
Yes		Yes	Displays current	Yes output such as output
Yes		Yes	equal to prog	Yes output such as output
			equal to prog		cap C382, CR342, etc.
			value?		cap C382, CR342, etc.
			value?
	No		No
	Go To sheet 9				Check W7, A2
			CC_Prog, R360	No	Check W7, A2
			CC_Prog, R360	No	Interface Board
			-4.7V		Interface Board
			-4.7V
			?

Q305A base

-11.4V

Yes

Go to sheet 8

No	PM_Inhibit, R335
No	PM_Inhibit, R335
	Low
	?


		Yes
		Yes	No
			No

	Troubleshoot Turn-On
	Control Circuit, Q305B,
	C, D and U305A

Check W7, A2

Interface Board

Yes

IMon_H,			Check Positive Current
IMon_H,		Yes	Check Positive Current
U309A-6,~0V		Yes	Control Circuit, U310B
U309A-6,~0V			Control Circuit, U310B
?



	No

Check High Range
Current Monitor Amp,
U309A

Figure 3-1 Sheet 7. No Output Voltage

Page 31

Image 31

Agilent Technologies 6632B, 6634B, 66332A, 6633B service manual 1Sheet 7. No Output Voltage, 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