Agilent Technologies AGILENT MODELS 6023A and 6028A A1TB1, A2 Board Mechanical Parts

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Table 5-7. Other Replacement Assemblies

Ref. Desig.	Agilent Model		Agilent Part Number		Description
			A1 Board Mechanical Parts
	6023A		1251-0600		Contact-conn M (Ref Fan)
A1J1	All		1251-5927		Connector post type header
A1J2	All		1251-5384		Connector post type header
A1J3	All		1251-8676		Connector post type
XA2P1	All		1251-8665		Connector post type
XA2P2	All		1251-8667		Connector post type
XA4P1,P2	All		1251-8806		Din Connector
	All		1251-5613		Single contact connector (ref. AC line
					voltage select)
	All		1480-0552		Pin, escutcheon (ref. L1)
	All		2110-0269		Fuseholder, clip type (ref. F2)
A1TB1	All		0360-2192		Barrier block
	All		0360-2190		Jumper, barrier block
			A2 Board Mechanical Parts
A2P1	All		1251-8664		Connector post type
A2P2	All		1251-8666		Connector post type
A2J1, J2	All		1251-8417		Din Connector
	All		1200-0485		Socket, IC 14-contact (ref.
	All		1205-0282		Heatsink (ref. Q2, U15, U16)
	All		1531-0309		Clevis (ref. A2 Board)
	All		0360-2195		Barrier block

			A3 Board Mechanical Parts
	All		4040-2121		Plastic (ref. DS9-12)
A1J1	All		1251-5055		Connector post type header
			A4 Board Mechanical Parts
A4P1,P2	All		1251-8807		Din Connector
	All		0362-0335		Single contact Connector (AC)
	6023A		1205-0919		Heatsink (ref. Q3, Q4)
	6028A		1205-0256		Heatsink (ref. Q3, Q4)
	All		1205-0282		Heatsink (ref. Q7)
	All		1531-0309		Clevis (ref. A4 Board)
	All		06023-20001		Heatsink (ref. CR7)
	All		06023-80002		Jumper, 10 AWG
	6028A		0380-1679		Hex head stand off (ref.Q3, Q4)
TP1-4	All		1251-0646		Connector single contact (pin)
			CHASSIS MECHANICAL	PARTS
	All		0380-1489		Spacer, snap in
	All		0380-1489		Spacer, snap in
	All		0370-1091		Knob, base round
	All		0403-0282		Bumper feet
	All		1510-0044		Binding post, single
	6023A		2110-0564		Fuseholder body (chassis fuse)
	6023A		2110-0565		Fuseholder cap (chassis fuse)
	6023A		2110-0569		Fuseholder nut (chassis fuse)
	6028A		2110-0926		Fuseholder assembly, (chassis fuse)
	All		3160-0309		Finger guard (ref. fan)

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Contents Autoranging Certification Safety Summary Printing History Safety Symbol DefinitionsTable of Contents Replaceable Parts Scope TroubleshootingCircuit Diagrams Safety ConsiderationsItem Description Manual RevisionsOperation Verification Tests Calibration ProcedureIntroduction Test Equipment RequiredTest Equipment Required Type Required Characteristics USE Recommended Model1KVA Initial SetupMON Calibration ProcedureIout VoutMeasurement Techniques Performance TestsCR7 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 TroubleshootingWAVEFORM/CONDITIONS Source Control Board Test Connector, A2J7PIN no Signal Name VdcElectrostatic Protection Repair and ReplacementA2 Control Board Removal A1 Main Board Removal A4 Power Mesh Board RemovalOverall Troubleshooting Procedure A3 Front-Panel Board RemovalMeasurement Using the TablesSetup NodeMain Troubleshooting Setup Main Troubleshooting SetupModified Mains Cord Set For Troubleshooting Front-Panel Troubleshooting Troubleshooting No-Output FailuresA2J7-26 A2J7-25 PWM-ON PWM-OFF Defective Check Functional CircuitsBoard Node + Measurement Source Troubleshooting Bias SuppliesSymptoms Defective Circuit Check Components Symptoms Defective Check Functional Circuits BoardMeasurement Source Node +Node + N0DE Setup Measurement Power Section BlocksTroubleshooting AC-Turn-on Circuits Setup Measurement SourceRelay Enable Troubleshooting PWM & ClockPower Limit PWM-OFF Troubleshooting DC-To-DC Converter+ OUT PWM-ONTroubleshooting CC Circuit Troubleshooting CV CircuitTroubleshooting OVP Circuit Troubleshooting Down ProgrammerA4U4OUT 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 DiagramControl-Voltage Comparator Power-Limit ComparatorConstant-Current CC Circuit Overvoltage Protection OVP CircuitAC-Surge Dropout Detector Initial-Ramp CircuitPulse-Width Modulator PWM Bias Voltage DetectorDisplay Circuits Second-Delay CircuitPage Reference Designators Replaceable PartsDescription Abbreviations Ordering InformationCR3 Electrical PartsCR1 CR2XA2P2 XA2P1Mechanical Parts Control Board Assembly CR3 Page Page Page VR4 VR3VR5 DS1 CR5DS5 VR1 IC A/D Cmos 3-1/2 DGTVR2 Pfet NPN SIChassis Electrical TS1A4 Board Mechanical Parts A1TB1A2 Board Mechanical Parts A3 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 General Information SpecificationsOption 002 Hardware Status Indicators Table A-1. Specifications, Option Remote ProgrammingInput Compliance Voltage ± Current Programming Enable Output Impedance 10.2 k ohm ± 5% Temperature CoefficientOn State logic low Remote Trip and Remote Reset TimingPower-on Preset Maximum Output Voltage logic high +Pard Typical Table A-1. Specifications, Option Pulse TimingBias Supplies DC Output Ratings 25C ± Short Circuit Output CurrentConnector 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 VR9Definitions Indicator and Qualifier SymbolsOLD Symbol NEW Symbol Logic Symbols and Definitions 102Schematic 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 6028A Model 6023A107 108 From