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Agilent Technologies 6632B, 6634B, 66332A, 6633B J307 Voltage Measurements, Troubleshooting

Models: 6632B 6633B 66332A 6634B

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Troubleshooting - 3

J307 Voltage Measurements

J307 connects the A1 Main Board Assembly to the A2 Interface Assembly. Table 3-4 provides a quick method of determining if the voltages between these assemblies are within the normal range. If any of these voltages is outside the normal range, refer to the flowcharts to further troubleshoot the circuit associated with the abnormal voltage.

Table 3-4. Voltage Measurements at J307 (A2 Interface to A1 Main board)

A1J307	Signal Name	CV Mode	CC Mode
Pin #		Full Scale Voltage	Full Scale Voltage
		No Load	Full Load
1	PM_INHIBIT (Enabled)	0	0
2	OV_SCR*	+5	+5
3	OV_PROG	+3.9	+3.9
4	FAN_PROG	+2.8	+3.8
5	OV_DETECT*	+5	+5
6	SW_POS (Norm)	+5	+5
7	RANGE_SELECT (High)	0	0
8	OS_TRIM_NEG (COMP)	+1.7	+1.7
	OS_TRIM_NEG (SCPI)	+4.0	+4.0
9	+5Vs	+5	+5
10	COMMON	0	0
11	COMMON	0	0
12	+15Vs	+15	+15
13	-15Vs	-15	-15
14	HS_THERM (@25C)	+2.5	+2.5
15	FUSE	+2.4	+2.6
16	IMON_H	0	+3.5
17	IMON_L	0	+14.7
	IMON_L (@20mA Out)	+4.8	+4.8
18	IMON_P	0	0
19	VMON	+4.8	+4.8
20	COMMON	0	0
21	COMMON	0	0
22	COMMON	0	0
23	COMMON	0	0
24	CV_PROG	-4.8	-4.8
25	CC_PROG	-4.8	-4.8
26	CC_DETECT*	+5	0
27	CCN_DETECT*	+5	+5
28	CV_DETECT*	0	+5

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Agilent Technologies 6632B, 6634B, 66332A, 6633B service manual J307 Voltage Measurements, 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 ALONESafety Symbol Definitions SymbolDescription 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 RevisionsVerification and Performance Tests IntroductionTest 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 Source Effect CV Noise PARDVerification 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 Load Effect CC Source Effect2 - Verification and Performance Tests Performance Test Equipment Form CC Noise PARDVerification 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 MeasurementsDisabling Protection Features Manual Fan Speed Control3 - 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 ReplacementLine Voltage Wiring Figure 3-3.Transformer 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 DiagramPower Circuits A1 Main Board Circuits4 - Principles of Operation Principles of Operation Figure 4-2.A1 Block Diagram4 - Principles of Operation Control CircuitsPrinciples of Operation Page Replaceable Parts List Table 5-1.Chassis, ElectricalIntroduction 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