Agilent Technologies AGILENT MODELS 6023A and 6028A service manual

Page 61

Table 5-4. A2 Control Board Parts List (continued)

Ref. Desig.

Agilent Model

Agilent Part Number

Description

R85

All

0698-3450

Resistor 42.2KΩ 1% 1/8W

R86

All

0757-0452

Resistor 27.4KΩ 1% 1/8W

R87

All

0683-2715

Resistor 270Ω 5% 1/8W

R88,89

All

0683-2225

Resistor 2.2KΩ 5% 1/4W

R90

All

0683-2715

Resistor 270Ω 5% 1/8W

R91

All

0683-2225

Resistor 2.2KΩ 5% 1/4W

R92

All

0683-2015

Resistor 200Ω 5% 1/4W

R93

All

0686-5125

Resistor 5.1KΩ 5% 1/4W

R94

All

0686-1035

Resistor 10KΩ 5% 1/4W

R95

All

0757-0472

Resistor 200KΩ 1% 1/8W

R96

6023A

0698-3572

Resistor 60.4KΩ 1% 1/8W

R96

6028A

0757-0455

Resistor 36.5KΩ 1% 1/8W

R97

All

0686-5125

Resistor 5.1KΩ 5% 1/4W

R98

All

0686-2735

Resistor 27KΩ 5% 1/4W

R99

All

0686-1035

Resistor 10KΩ 5% 1/4W

R100,101

All

1810-0365

Network sip 2.2KΩ X5

R102,103

All

0757-0449

Resistor 20KΩ 1% 1/8W

R104

All

0757-0280

Resistor 1KΩ l% 1/8W

R105

All

0698-3430

Resistor 21.5KΩ 1% 1/8W

R106

All

0698-3449

Resistor 28.7KΩ 1% 1/8W

R107

All

0698-3153

Resistor 3.38KΩ 1% 1/8W

R108

All

0683-2035

Resistor 20KΩ 5% 1/4W

R109

All

0683-2225

Resistor 2.2KΩ 5% 1/4W

R110

All

0683-4725

Resistor 4.7KΩ 5% 1/4W

R111

All

0683-2025

Resistor 2KΩ 5% 1/4W

R112

All

0683-1125

Resistor 1.1KΩ 5% 1/4W

R113

All

0757-0442

Resistor 10KΩ 1% 1/8W

R114

All

0757-0424

Resistor 1.1KΩ 1% 1/8W

R115

All

0683-1015

Resistor 100Ω 5% 1/4W

R116

All

0683-3498

Resistor 8.66KΩ 1% 1/8W

R117

All

0757-0438

Resistor 5.11KΩ 1% 1/8W

R118

All

1810-0365

Network sip 2.2KΩ X5

R119

All

0757-0288

Resistor 9.09Ω 1% 1/8W

R120

All

0683-1005

Resistor 10Ω 5% 1/4W

R121

All

0757-0442

Resistor 10KΩ 1% 1/8W

R122

All

0683-5135

Resistor 51KΩ 5% 1/4W

R123-126

All

0683-4725

Resistor 4.7KΩ 5% 1/4W

R127

All

0683-1855

Resistor 1.8MO 5% 1/4W

R128

All

0683-6835

Resistor 68KΩ 5% 1/4W

R129

All

0757-0439

Resistor 6.8KΩ l% 1/8W

R130

All

0683-1055

Resistor 1MΩ 5% 1/4W

R131

All

0683-3335

Resistor 33KΩ 5% 1/4W

R132

All

0683-2225

Resistor 2.2KΩ 5% 1/4W

R133

All

0683-2735

Resistor 27KΩ 5% 1/4W

R134

All

0757-0466

Resistor 110KΩ 1% 1/8W

R135,136

All

0757-0442

Resistor 10KΩ 1% 1/8W

R137

All

0698-3455

Resistor 261KΩ 1% 1/8W

R138

All

0683-2045

Resistor 200KΩ 5% 1/4W

61

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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 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 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 FailuresA2J7-26 A2J7-25 PWM-ON PWM-OFF Defective Check Functional CircuitsBoard Symptoms Defective Circuit Check Components Troubleshooting Bias SuppliesSymptoms Defective Check Functional Circuits Board Node + Measurement SourceMeasurement Source Node +Node + N0DE Troubleshooting AC-Turn-on Circuits Power Section BlocksSetup Measurement Source Setup MeasurementRelay Enable Troubleshooting PWM & ClockPower Limit + OUT Troubleshooting DC-To-DC ConverterPWM-ON PWM-OFFTroubleshooting 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 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 CR3XA2P2 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 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 General Information SpecificationsOption 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 6028A Model 6023A107 108 From
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