Manuals / Agilent Technologies / Home Audio / Stereo System

Agilent Technologies 6633B, 6634B, 66332A Troubleshooting, 1Sheet 2. Main Flowchart continued

Models: 6632B 6633B 66332A 6634B

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Figure 3-1 Sheet 2. Main Flowchart (continued)

3 - Troubleshooting

Continued from sheet 1

Program Voltage and Current full scale, enable output with no load. Measure Voltage at output terminals.

Display and							Voltage close
measured					No		Voltage close
measured					No		to programmed
voltage OK?							to programmed
voltage OK?							value?
							value?


								Yes
	Yes							Yes
	Yes

										If output is OK but
										meter wrong, replace
		Output Voltage								A2. If both are off,
No		Output Voltage					No			A2. If both are off,
No		near zero?					No			check gain of
		near zero?								check gain of
										Voltage Monitor
										Amplifier A1U315B
										Amplifier A1U315B
			Yes

Load output to put unit into CC and measure output current with extrenal amp meter

Display and measured current OK?

Yes

Calibrate Voltage

Current close

No to programmed value?

Yes

Go to

"Troubleshooting No Output Voltage"

(sheet 7)

Current > prog

No and unit not in CC?

Yes

		If output is OK but
		meter wrong, replace
		A2. If in CC but both
		are off, check gain of
		Current Monitor
		Amplifiers and
		Monitor Resistor
No		Monitor Resistor
No		R403/473 values. If
		R403/473 values. If
		the current is lower
		than programmed
		and UNReg is
		displayed, check

Program OV below output voltage

OV Trips?

Yes

No

Calibrate Current

Go to

"Troubleshooting Unit Does not OV” (sheet 11)

Go to "Troubleshooting No Current limit" (sheet 10)

A1Q307 and Output

Stage

Program OV to maximum and reset protection

Go to sheet 3

Figure 3-1 Sheet 2. Main Flowchart (continued)

26

Image 26

Agilent Technologies 6633B, 6634B, 66332A, 6632B service manual Troubleshooting, 1Sheet 2. Main Flowchart continued

Contents

Dynamic Measurement DC Source System DC Power SupplyAgilent Model 66332A and Agilent Model 6632B, 6633B, 6634BLIMITATION OF WARRANTY Warranty InformationWARRANTY CERTIFICATIONDO NOT SERVICE OR ADJUST ALONE Safety SummaryBEFORE APPLYING POWER SAFETY SYMBOLSDescription Safety Symbol DefinitionsSymbol Item Description Printing HistoryInstrument Identification INTRODUCTION Table of ContentsTROUBLESHOOTING VERIFICATION AND PERFORMANCE TESTSPRINCIPLES OF OPERATION REPLACEABLE PARTS LISTDIAGRAMS INDEXPage Organization Safety ConsiderationsIntroduction Related DocumentsManual Revisions RevisionsElectrostatic Discharge Firmware RevisionsTest Equipment Required Verification and Performance TestsIntroduction 2 - Verification and Performance Tests Test SetupMeasurement Techniques Figure 2-1.Test SetupElectronic Load Operation Verification TestsPerformance Tests Current-MonitoringResistorVoltage Programming and Readback Accuracy CV SetupConstant Voltage CV Tests CV Load EffectVerification and Performance Tests CV Source EffectCV Noise PARD Constant Current CC Tests Transient Recovery TimeCC Setup Current Programming and Readback AccuracyCC Load and Line Regulation Current Sink -CCOperationLow Range Current Readback Accuracy 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 Introduction3 - Troubleshooting Overall TroubleshootingFlow Charts 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 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 VoltagesJ307 Voltage Measurements Troubleshooting3 - Troubleshooting Disabling Protection FeaturesManual Fan Speed Control Post-repairCalibration Inhibit Calibration SwitchCalibration Password TroubleshootingInitialization ROM UpgradeUpgrade Procedure Identifying the FirmwareTroubleshooting Disassembly ProceduresList of Required Tools Figure 3-2.Component LocationFront Panel Assembly, Removal and Replacement Cover, Removal and ReplacementA2 Interface Board, Removal and Replacement 3 - TroubleshootingT1 Power Transformer, Removal and Replacement S1 Line Switch, Removal and ReplacementA3 Front Panel Board, Removal and Replacement A1 Main Control Board3 - Troubleshooting Line Voltage WiringFigure 3-3.Transformer Wiring Table 4-1.Power Supply Interface signals I/O Interface SignalsPrinciples of Operation IntroductionPrimary Interface A3 Front Panel CircuitsA2 Interface Circuits 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 Table 5-5.A5 AC input/RFI Board 5 - Replaceable PartsTable 5-4.Binding Post Option #020 Table 5-6.Relay Option #760Introduction DiagramsGeneral Schematic Notes Table 6-1. Model-dependentComponentsDesignator 6 - DiagramsTable 6-1. Model-dependentComponents continued 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