Agilent Technologies AGILENT MODELS 6023A and 6028A service manual

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

Ref. Desig.	Agilent Model	Agilent Part Number	Description
R48,49	All	0686-1315	Resistor 130Ω 5% 1/2W
R50	All	0811-3174	Resistor 0.07Ω 5% 5W
R51	All	0698-6076	Resistor 39KΩ 1% 1/8W
R52	All	0757-0280	Resistor 1KΩ 1% 1/8W
R53	All	0698-4121	Resistor 11.3KΩ 1% 1/8W
R54	All	0683-2015	Resistor 200Ω 5% 1/4W
R55	6023A	0683-5655	Resistor 5.6MΩ 5% 1/4W
R55	6028A	0683-1055	Resistor 1MΩ 5% 1/4W
R56	6023A	0757-0408	Resistor 243Ω 1% 1/4W
R56	6028A	0757-0269	Resistor 270Ω 1/4W
R57	6023A	0683-1325	Resistor 1.3KΩ 5% 1/4W
R57	6028A	0683-2015	Resistor 200Ω 5% 1/4W
R58	All	0683-1045	Resistor 100KΩ 5% 1/4W
R59	All	0698-8816	Resistor 2.15Ω 1% 1/8W
R60	All	0757-0199	Resistor 21.5KΩ 1% 1/8W
R61	6023A	0699-0059	Resistor 5KΩ 0.1% 0.1W
R61	6028A	0698-6360	Resistor 10KΩ 0.1% 1/8W
R62	6023A	0698-3432	Resistor 26.1Ω 1% 1/8W
R62	6028A	8159-0005	Wire tinned copper AWG 22
R63	6023A	0699-0059	Resistor 5KΩ 0.1% 0.1W
R63	6028A	0698-6360	Resistor 10KΩ 1/8W
R64	All	0683-5125	Resistor 5.1KΩ 5% 1/4W
R65,66	6023A	0699-0118	Resistor 20KΩ 0.1% 0.1W
R65	6028A	0699-1210	Resistor 80KΩ 0.1% 0.1W
R66	6028A	0699-1211	Resistor 95KΩ 0.1% 0.1W
R67,68	All	0686-5125	Resistor 5.1KΩ 5% 1/2W
R69	All	0683-2225	Resistor 2.2KΩ 5% 1/4W
R70	All	0683-2015	Resistor 200Ω 5% 1/4W
R71	6023A	0683-2735	Resistor 27KΩ 5% 1/4W
R71	6028A	0698-5089	Resistor 33KΩ 1% 1/8W
R72	6023A	0757-0465	Resistor 100KΩ 1% 1/8W
R72	6028A	0757-0470	Resistor 162KΩ 1% 1/8W
R73,74	6023A	0683-2035	Resistor 20KΩ 5% 1/4W
R73,74	6028A	0757-0452	Resistor 27.4KΩ 1% 1/8W
R75	All	0683-7545	Resistor 750KΩ 5% 1/4W
R76	6023A	0683-4735	Resistor 47KΩ 5% 1/4W
R76	6028A	0757-0446	Resistor 15KΩ 1% 1/8W
R77	6023A	0683-7545	Resistor 750KΩ 5% 1/4W
R77	6028A	0757-0469	Resistor 150KΩ 1% 1/8W
R78	6023A	0757-0415	Resistor 475Ω 1% 1/8W
R78	6028A	0698-4014	Resistor 787Ω 1% 1/8W
R79	All	0698-6983	Resistor 20.4KΩ 0.1% 1/8W
R80	All	0698-6320	Resistor 5KΩ 0.1% 1/8W
R81	All	0757-0459	Resistor 56.2KΩ 0.1% 1/8W
R82	All	0683-3325	Resistor 3.3KΩ 5% 1/8W
R83	All	0757-0270	Resistor 249KΩ 1% 1/8W
R84	6023A	0683-5125	Resistor 5.1KΩ 5% 1/4W
R84	6023A	0757-0442	Resistor 10KΩ 1% 1/8W

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Contents Autoranging Certification Safety Summary Safety Symbol Definitions Printing HistoryTable of Contents Replaceable Parts Troubleshooting Circuit DiagramsSafety Considerations ScopeManual Revisions Item DescriptionCalibration Procedure IntroductionTest Equipment Required Operation Verification TestsType Required Characteristics USE Recommended Model Test Equipment RequiredInitial Setup 1KVACalibration Procedure MONVout IoutPerformance Tests Measurement TechniquesCR7 Current-Monitoring Resistor Setup Constant Voltage CV TestsBasic Test Setup RMS Measurement Test Setup, CV Pard Test Peak-To-Peak Measurement Test Setup, CV Pard Test 6023A 6028A KHz Noise, CV Peak-to-Peak PardLoad Transient Recovery Waveform Constant Current CC Tests CC Pard Test Setup Troubleshooting Initial Troubleshooting ProceduresControl Board Test Connector, A2J7 PIN no Signal NameVdc WAVEFORM/CONDITIONS SourceRepair and Replacement Electrostatic ProtectionA2 Control Board Removal A4 Power Mesh Board Removal Overall Troubleshooting ProcedureA3 Front-Panel Board Removal A1 Main Board RemovalUsing the Tables SetupNode MeasurementMain Troubleshooting Setup Main Troubleshooting SetupModified Mains Cord Set For Troubleshooting Troubleshooting No-Output Failures Front-Panel TroubleshootingPWM-ON PWM-OFF Defective Check Functional Circuits A2J7-26 A2J7-25Board Troubleshooting Bias Supplies Symptoms Defective Circuit Check ComponentsSymptoms Defective Check Functional Circuits Board Node + Measurement SourceNode + Measurement SourceNode + N0DE Power Section Blocks Troubleshooting AC-Turn-on CircuitsSetup Measurement Source Setup MeasurementTroubleshooting PWM & Clock Relay EnablePower Limit Troubleshooting DC-To-DC Converter + OUTPWM-ON PWM-OFFTroubleshooting CV Circuit Troubleshooting CC CircuitTroubleshooting Down Programmer Troubleshooting OVP CircuitA4U4OUT Waveforms SET Voltage Vdc Node + Page Autoranging Power Block Diagram OverviewBlock Diagram Simplified Schematic Simplified Schematic DC-to-DC Converter Down ProgrammerPfet Control Signals Timing Diagram Constant-Voltage CV CircuitPower-Limit Comparator Constant-Current CC CircuitOvervoltage Protection OVP Circuit Control-Voltage ComparatorInitial-Ramp Circuit Pulse-Width Modulator PWMBias Voltage Detector AC-Surge Dropout DetectorSecond-Delay Circuit Display CircuitsPage Replaceable Parts Reference DesignatorsOrdering Information Description AbbreviationsElectrical Parts CR1CR2 CR3XA2P1 XA2P2Mechanical Parts Control Board Assembly CR3 Page Page Page VR3 VR4VR5 CR5 DS1DS5 IC A/D Cmos 3-1/2 DGT VR1VR2 NPN SI PfetTS1 Chassis ElectricalA1TB1 A2 Board Mechanical PartsA3 Board Mechanical Parts A4 Board Mechanical PartsOption 220 220V Operation Option 240 240V 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 Table A-1. Specifications, Option Remote Programming Input Compliance Voltage ± Current Programming EnableOutput Impedance 10.2 k ohm ± 5% Temperature Coefficient Status IndicatorsRemote Trip and Remote Reset Timing Power-on PresetMaximum Output Voltage logic high + On State logic lowTable A-1. Specifications, Option Pulse Timing Bias Supplies DC Output Ratings 25C ±Short Circuit Output Current Pard TypicalInstallation Connector Assembly ProcedureFigure A-1. Mating Connector Assembly OperationLocal/Remote Programming Resistance Voltage or Current Remote Resistance Programming Figure A-4. Calculating Value of Series Dropping ResistorFigure A-5. Remote Resistance Programming Remote Monitoring Status Indicators Remote ControlRemote Reset OvervoltagePower-On Preset Figure A-8. Remote ControlAC Dropout Buffer Circuit Multiple Supply System ShutdownMaintenance Bias SuppliesTroubleshooting Resistance and Voltage Programming Troubleshooting Current ProgrammingFigure A-11. Troubleshooting Current Programming of CV Mode Figure A-13. Troubleshooting Status Indicators Page Table A-3. Replacement Parts REF. Desig Model no Description100 VR9 101Indicator and Qualifier Symbols OLD Symbol NEW SymbolLogic Symbols and Definitions 102 DefinitionsSchematic Notes Schematic Diagram Notes 103Schematic Notes Figure A-15. Option 002 Board, Component Location 104Figure A-16. Option 002 Board, Schematic Diagram 105 Page Model 6023A Model 6028A107 From 108