Agilent Technologies AGILENT MODELS 6023A and 6028A Electrical Parts, CR1, CR2, CR3, CR4

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Table 5-3. A1 Main Board Parts List

Ref. Desig.	Agilent Model	Agilent Part Number	Description
		ELECTRICAL PARTS
Al	6023A	06038-60021	Main Board Assembly
Al	6028A	06038-61021	Main Board Assembly
C1	All	0160-4962	Capacitor, 1∝F + 10% 50Vac
C2,3	All	0180-3426	Capacitor, 590∝F + 50-10% 400V
C4	All	0180-3427	Capacitor, 300∝F + 50-10% 200V
C5	All	0160-4962	Capacitor, l∝F + 10% 50V
C6,7	All	0160-5933	Capacitor, 0.022∝F + 10% 1500V
C8-10	6023A	0180-3425	Capacitor, 5500∝F +50-10% 40V
C8-10	6028A	0160-3548	Capacitor, 1700∝F 75V
C11-12	6023A	0160-5377	Capacitor, 2.2∝F +10% 6.3V
C11-12	6028A	0160-6167	Capacitor, 2.2∝F 63V
C13,14	6023A	0160-7731	Capacitor, 0.22∝F + 10% 1500V
C13,14	6028A	0160-5933	Capacitor, 0.022∝F + 10% 1500V
C15,16	All	0160-4355	Capacitor, 0.01∝F + 10% 250V
C17	6023A	0160-5422	Capacitor, 0.047∝F + 20% 50V
C17	6028A	0160-4834	Capacitor, 0.047∝F + 20% 50V
C20,21	All	0180-3428	Capacitor, 1000∝F 50V
C22,23	All	0160-4439	Capacitor, 4700∝F 20% 250V
C24,25	6028A	0160-4281	Capacitor, 2200∝F 20% 250V
C26	6028A	0160-4323	Capacitor, 0.047∝F 20% 250V
CR1-4	6023A	1901-1199	Diode power rectifier 600V 3A
CR1	6028A	1901-1087	Diode power rectifier 600V 3A
CR2	6028A	1901-0759	Diode power rectifier 600V 3A
CR3	6028A	1901-1087	Diode power rectifier 600V 3A
CR4	6028A	1901-0759	Diode power rectifier 600V 3A
CR6, 7	All	1901-0731	Diode power rectifier 600V 3A
CR8, 9	All	1901-0050	Diode power rectifier 600V 3A
CR13, 15	All	1901-0731	Diode power rectifier 600V 3A
F2	All	2110-0007	Fuse 1A 250V
F3	6028A	2110-0763	Fuse 1/4A 125V
J1	All	1251-5927	Connector, 26-contact
J2	All	1251-5384	Connector, 3-contact
J3	All	1251-8676	Connector, 5-contact
K1	All	0490-1417	Relay, DPST
L1	All	06024-80094	Choke RFI 3A (magnetic core 9170-0721)
L3	6023A	5080-1981	Choke, output 0.5∝H
L3	6028A	9140-0987	Choke 3∝H
Q1	6028A	1854-0087	Transistor NPN SI
Q2	6028A	1854-0799	Transistor NPN SI TIP41C
R1	All	0811-3667	Resistor 20Ω 5% 7W
R2	All	0811-1865	Resistor 2kΩ 10% 5W
R3	6023A	5080-2007	Sensing resistor 0.005
R4	All	0683-1025	Resistor 1KΩ 5% 1/4W
R5	6023A	8151-0013	Wire, 22 AWG
R5	6028A	7175-0057	Wire, tinned copper, AWG 22
R6	All	0683-1025	Resistor 1KΩ 5% 1/4W
R7	6028A	0699-1210	Resistor 80KΩ 0.1% 0.1W
R8-10	6023A	8151-0013	Wire, 22 AWG

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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