Agilent Technologies AGILENT MODELS 6023A and 6028A service manual Control Board Assembly

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Table 5-4. A2 Control Board Parts List

Ref. Desig.	Agilent Model	Agilent Part Number	Description
		ELECTRICAL PARTS
A2		06038-61023	Control Board Assembly
A2		06023-60023	Control Board Assembly
C1	All	0160-5469	Capacitor, l∝F + 10% 50V
C2	All	0160-5422	Capacitor, 0.047∝F 20% 50V
C3	6023A	0160-4801	Capacitor, 100pF 5% 100V
C3	6028A	0160-4812	Capacitor, 220pF 5%
C7	All	0160-5422	Capacitor, 0.047∝F 20% 50V
C8	All	0160-4812	Capacitor, 220pF 5% 100V
C9	All	0160-5377	Capacitor, 2.2∝F 10% 63V
C10,11	All	0160-5469	Capacitor, 1∝F 10% 50V
C12,13	All	0160-5422	Capacitor, 0.047∝F 20% 50V
C14	All	0180-0291	Capacitor, 1∝F 10% 35V
C15	All	0180-1731	Capacitor, 4.7∝F 10% 50V
C16,17	All	0180-0230	Capacitor, l∝F + 20% 50V
C18,19	6023A	0180-0291	Capacitor, l∝F 10% 35V
C18,19	6028A	0180-0230	Capacitor, l∝F 20% 50V
C20	All	0180-2624	Capacitor, 2000∝F 75-25% 10V
C21	All	0180-5098	Capacitor, 0.22∝F 10% 50V
C22	All	0180-4832	Capacitor, 0.01∝F 10% 100V
C23	All	0180-3407	Capacitor, 2200pF +50-10% 35V
C24	All	0180-5098	Capacitor, 0.22∝F 10% 50V
C25	All	0160-4833	Capacitor, 0.022∝F 10% 100V
C26	All	0160-0154	Capacitor, 2200pF 10% 200V
C27,28	All	0160-5422	Capacitor, 0.047∝F 20% 50V
C29	6023A	0160-4808	Capacitor, 470pF 5% 100V
C29	6028A	0160-4812	Capacitor, 220pF 5% 100V
C30	All	0160-4830	Capacitor, 2200pF 10% 100V
C31	6023A	0160-4808	Capacitor, 470pF 5% 100V
C31	6028A	0160-4801	Capacitor, 100pF 5% 100V
C32	All	0160-4801	Capacitor, 100pF 5% 100V
C33-37	6023A	0160-5422	Capacitor, 0.047∝F 20% 50V
C33-35	6028A	0160-5422	Capacitor, 0.047∝F 20% 50V
C36	6028A	0160-4833	Capacitor, 0.022∝F 10% 100V
C37	6028A	0160-5422	Capacitor, 0.047∝F 20% 50V
C38	6023A	0160-4801	Capacitor, 100pF 5% 100V
C38	6028A	0I60-4803	Capacitor, 68pF 5% 100V
C39,40	All	0160-5422	Capacitor, 0.047∝F 20% 50V
C41	All	0160-4835	Capacitor, 0.l∝F 10% 50V
C42	All	0160-4805	Capacitor, 47pF 5% 100V
C43	All	0160-5422	Capacitor, 0.047∝F 20% 50V
C44	All	0160-4805	Capacitor, 47pF 5% 100V
C45	6023A	0160-4808	Capacitor, 470pF 5% 100V
C45	6028A	0160-4810	Capacitor, 330pF 5% 100V
C46	All	0160-4807	Capacitor, 33pF 5% 100V
C47	All	0160-4822	Capacitor, 1000pF 5% 100V
C48	All	0160-5422	Capacitor, 0.047∝F 20% 50V
C49	6023A	0160-5644	Capacitor, 0.033∝F 10% 50V
C49	6028A	0160-4833	Capacitor, 0.022∝F 10% 100V

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Contents Autoranging Certification Safety Summary Printing History Safety Symbol DefinitionsTable of Contents Replaceable Parts Circuit Diagrams TroubleshootingSafety Considerations ScopeItem Description Manual RevisionsIntroduction Calibration ProcedureTest Equipment Required Operation Verification TestsTest Equipment Required Type Required Characteristics USE Recommended Model1KVA Initial SetupMON Calibration ProcedureIout VoutPerformance Tests Measurement TechniquesCR7 Constant Voltage CV Tests Current-Monitoring Resistor SetupBasic Test Setup RMS Measurement Test Setup, CV Pard Test Peak-To-Peak Measurement Test Setup, CV Pard Test KHz Noise, CV Peak-to-Peak Pard 6023A 6028ALoad Transient Recovery Waveform Constant Current CC Tests CC Pard Test Setup Initial Troubleshooting Procedures TroubleshootingPIN no Signal Name Control Board Test Connector, A2J7Vdc WAVEFORM/CONDITIONS SourceElectrostatic Protection Repair and ReplacementA2 Control Board Removal Overall Troubleshooting Procedure A4 Power Mesh Board RemovalA3 Front-Panel Board Removal A1 Main Board RemovalSetup Using the TablesNode MeasurementMain Troubleshooting Setup Main Troubleshooting SetupModified Mains Cord Set For Troubleshooting Front-Panel Troubleshooting Troubleshooting No-Output FailuresPWM-ON PWM-OFF Defective Check Functional Circuits A2J7-26 A2J7-25Board Symptoms Defective Circuit Check Components Troubleshooting Bias SuppliesSymptoms Defective Check Functional Circuits Board Node + Measurement SourceNode + Measurement SourceNode + N0DE Troubleshooting AC-Turn-on Circuits Power Section BlocksSetup Measurement Source Setup MeasurementTroubleshooting PWM & Clock Relay EnablePower Limit + OUT Troubleshooting DC-To-DC ConverterPWM-ON PWM-OFFTroubleshooting CC Circuit Troubleshooting CV CircuitTroubleshooting Down Programmer Troubleshooting OVP CircuitA4U4OUT Waveforms SET Voltage Vdc Node + Page Block Diagram Overview Autoranging PowerBlock Diagram Simplified Schematic Simplified Schematic Down Programmer DC-to-DC ConverterConstant-Voltage CV Circuit Pfet Control Signals Timing DiagramConstant-Current CC Circuit Power-Limit ComparatorOvervoltage Protection OVP Circuit Control-Voltage ComparatorPulse-Width Modulator PWM Initial-Ramp CircuitBias Voltage Detector AC-Surge Dropout DetectorDisplay Circuits Second-Delay CircuitPage Reference Designators Replaceable PartsDescription Abbreviations Ordering InformationCR1 Electrical PartsCR2 CR3XA2P1 XA2P2Mechanical Parts Control Board Assembly CR3 Page Page Page VR3 VR4VR5 CR5 DS1DS5 IC A/D Cmos 3-1/2 DGT VR1VR2 Pfet NPN SIChassis Electrical TS1A2 Board Mechanical Parts A1TB1A3 Board Mechanical Parts A4 Board Mechanical PartsOption 240 240V Operation Option 220 220V OperationComponent Location and Circuit Diagrams Schematic Diagram Notes Pin locations for other semi-conductors are shown below Top View, Top Covers Removed Main Board A1 Component Location Control Board A2 Component Location Front-Panel Board A3 Component Location Power Mesh Board A4 Component Location Page Page Specifications General InformationOption 002 Hardware Input Compliance Voltage ± Current Programming Enable Table A-1. Specifications, Option Remote ProgrammingOutput Impedance 10.2 k ohm ± 5% Temperature Coefficient Status IndicatorsPower-on Preset Remote Trip and Remote Reset TimingMaximum Output Voltage logic high + On State logic lowBias Supplies DC Output Ratings 25C ± Table A-1. Specifications, Option Pulse TimingShort Circuit Output Current Pard TypicalConnector Assembly Procedure InstallationOperation Figure A-1. Mating Connector AssemblyLocal/Remote Programming Resistance Voltage or Current Figure A-4. Calculating Value of Series Dropping Resistor Remote Resistance ProgrammingFigure A-5. Remote Resistance Programming Remote Monitoring Remote Control Status IndicatorsOvervoltage Remote ResetFigure A-8. Remote Control Power-On PresetMultiple Supply System Shutdown AC Dropout Buffer CircuitBias Supplies MaintenanceTroubleshooting Current Programming Troubleshooting Resistance and Voltage ProgrammingFigure A-11. Troubleshooting Current Programming of CV Mode Figure A-13. Troubleshooting Status Indicators Page REF. Desig Model no Description Table A-3. Replacement Parts100 101 VR9OLD Symbol NEW Symbol Indicator and Qualifier SymbolsLogic Symbols and Definitions 102 DefinitionsSchematic Diagram Notes 103 Schematic NotesFigure A-15. Option 002 Board, Component Location 104 Schematic NotesFigure A-16. Option 002 Board, Schematic Diagram 105 Page Model 6023A Model 6028A107 108 From