Manuals / Agilent Technologies / Home Audio / Stereo System

Agilent Technologies 6634B, 66332A, 6633B Troubleshooting, 1Sheet 8. No Output Voltage continued

Models: 6632B 6633B 66332A 6634B

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Figure 3-1 Sheet 8. No Output Voltage (continued)

3 - Troubleshooting

Continued from sheet 7

Q302 base -5V

		Check C330, R333,
No		Check C330, R333,
No		R346, and Q302
		R346, and Q302

Yes

Q303 base >1.2V		Check +Rail and
	Yes
(meas. from +Out)		Output Stage

>1V across R323		No
>1V across R323		No
?


	Yes
Q307 collector to
		No
		No
emitter
emitter
4V?

Check Q301, Q305 circuits

Check Q302, Q307, R324 and R326

Yes

Check C331, C333,

C339 and Q306

circuits

Figure 3-1 Sheet 8. No Output Voltage (continued)

Page 32

Image 32

Agilent Technologies 6634B, 66332A, 6633B, 6632B service manual Troubleshooting, 1Sheet 8. No Output Voltage continued

Contents

System DC Power Supply Agilent Model 66332ADynamic Measurement DC Source and Agilent Model 6632B, 6633B, 6634BWarranty Information WARRANTYLIMITATION OF WARRANTY CERTIFICATIONSafety Summary BEFORE APPLYING POWERDO NOT SERVICE OR ADJUST ALONE SAFETY SYMBOLSDescription Safety Symbol DefinitionsSymbol Item Description Printing HistoryInstrument Identification Table of Contents TROUBLESHOOTINGINTRODUCTION VERIFICATION AND PERFORMANCE TESTSREPLACEABLE PARTS LIST DIAGRAMSPRINCIPLES OF OPERATION INDEXPage Safety Considerations IntroductionOrganization Related DocumentsRevisions Electrostatic DischargeManual Revisions Firmware RevisionsTest Equipment Required Verification and Performance TestsIntroduction Test Setup Measurement Techniques2 - Verification and Performance Tests Figure 2-1.Test SetupOperation Verification Tests Performance TestsElectronic Load Current-MonitoringResistorCV Setup Constant Voltage CV TestsVoltage Programming and Readback Accuracy CV Load EffectVerification and Performance Tests CV Source EffectCV Noise PARD Transient Recovery Time CC SetupConstant Current CC Tests Current Programming and Readback AccuracyCurrent Sink -CCOperation Low Range Current Readback AccuracyCC Load and Line Regulation Verification and Performance Tests2 - Verification and Performance Tests CC Load EffectCC Source Effect Verification and Performance Tests Performance Test Equipment FormCC Noise PARD Performance Test Record Forms 2 - Verification and Performance TestsVerification and Performance Tests 2 - Verification and Performance Tests Troubleshooting IntroductionOverall Troubleshooting Flow Charts3 - Troubleshooting Test Equipment RequiredTroubleshooting Figure 3-1Sheet 1. Main Flowchart3 - 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 VoltageSpecific Troubleshooting Procedures Power-on Self-testFailuresTroubleshooting Table 3-2. Self-TestError Codes/MessagesCV/CC Status Annunciators Troubleshooting Bias and Rail Voltages3 - Troubleshooting Table 3-3.Bias and Reference VoltagesJ307 Voltage Measurements Troubleshooting3 - Troubleshooting Disabling Protection FeaturesManual Fan Speed Control Inhibit Calibration Switch Calibration PasswordPost-repairCalibration TroubleshootingROM Upgrade Upgrade ProcedureInitialization Identifying the FirmwareDisassembly Procedures List of Required ToolsTroubleshooting Figure 3-2.Component LocationCover, Removal and Replacement A2 Interface Board, Removal and ReplacementFront Panel Assembly, Removal and Replacement 3 - TroubleshootingS1 Line Switch, Removal and Replacement A3 Front Panel Board, Removal and ReplacementT1 Power Transformer, Removal and Replacement A1 Main Control Board3 - Troubleshooting Line Voltage WiringFigure 3-3.Transformer Wiring I/O Interface Signals Principles of OperationTable 4-1.Power Supply Interface signals IntroductionA3 Front Panel Circuits A2 Interface CircuitsPrimary Interface Secondary InterfacePrinciples of Operation Figure 4-1.A2/A3 Block Diagram4 - Principles of Operation Power CircuitsA1 Main Board Circuits Figure 4-2.A1 Block Diagram Principles of OperationControl Circuits 4 - Principles of OperationPrinciples of Operation Page Table 5-1.Chassis, Electrical Replaceable Parts ListIntroduction 5 - Replaceable Parts Table 5-2.Chassis, MechanicalReplaceable Parts Figure 5-1.Mechanical Parts ldentificationTable 5-3.A1 Control Board PC Board Assembly 5 - Replaceable PartsReplaceable 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 #760Diagrams General Schematic NotesIntroduction Table 6-1. Model-dependentComponents6 - Diagrams Table 6-1. Model-dependentComponents continuedDesignator 66332ADiagrams Table 6-2.A1 Board Component Locations6 - 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 Page Manual Updates