Agilent Technologies AGILENT MODELS 6023A and 6028A service manual CR3

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

Ref. Desig.	Agilent Model	Agilent Part Number	Description
C50	6023A	0160-0167	Capacitor, 0.082∝F 10% 200V
C50	6028A	0160-0168	Capacitor, 0.l∝F 10% 200V
C51	All	0160-4801	Capacitor, 100pF 5% 100V
C52,53	All	0160-4831	Capacitor, 4700pF 10% 100V
C54	All	0160-5422	Capacitor, 0.047∝F 20% 50V
C55,56	All	0160-4801	Capacitor, 100pF 5% 100V
C57,58	All	0160-5422	Capacitor, 0.047∝F 20% 50V
C59	All	0160-4812	Capacitor, 220pF 5% 100V
C60	All	0160-5422	Capacitor, 0.047∝F 20% 50V
C61	All	0160-4812	Capacitor, 220pF 5% 100V
C62	All	0160-5422	Capacitor, 0.047∝F 20% 50V
C63	All	0180-0116	Capacitor, 6.8∝F 10% 35V
C64,65	All	0160-5422	Capacitor, 0.047∝F 20% 50V
C66	All	0180-0376	Capacitor, 0.47∝F 10% 35V
C67,68	All	0160-4812	Capacitor, 220pF 5% 100V
C69	All	0180-4832	Capacitor, 0.01∝F 10% 100V
C70	All	0180-1980	Capacitor, 1∝F 5% 35V
C71	All	0160-5422	Capacitor, 0.047∝F 20% 50V
C72	6028A	0160-5422	Capacitor, 0.047∝F 20% 50V
CRl,2	All	1901-0033	Diode general purpose 180V 200mA
CR3	All	1901-0050	Diode switching 80V 200A
CR5-7	All	1901-0033	Diode general purpose 180V 200mA
CR8-10	All	1901-0050	Diode switching 80V 200A
CR11	All	1901-0992	Diode power rectifier 40V 3A
CR12-16	All	1901-0033	Diode general purpose 180V 200mA
CR18	All	1901-0033	Diode general purpose 180V 200mA
CR19	All	1901-0050	Diode switching 80V 200A
CR20	All	1901-0033	Diode general purpose 180V 200mA
CR21-30	All	1901-0050	Diode switching 80V 200A
J1,2	All	1251-8417	Connector, 16-contact
L1	All	06023-80090	Choke bias 820 ∝H
P1	All	1251-8664	Connector 30-contact
P2	All	1251-8666	Connector 20-contact
Q1,2	All	1855-0413	Transistor J-FET P-chan 2N5116
Q3	All	1854-0635	Transistor NPN SI D44H5
Q4	All	1853-0012	Transistor PNP SI 2N2904A
Q5	All	1854-0823	Transistor NPN SI
Q6	All	1858-0023	Transistor array CA3081E
Q7	6028A	1854-0087	Transistor NPN SI
R1	All	0683-5125	Resistor 51kΩ 1/2W
R2	6023A	0683-3925	Resistor 39KΩ 5% 1/4W
R2	6028A	0757-0419	Resistor 681Ω 1% 1/8W
R3	6023A	0698-6329	Resistor 845Ω 1% 1/8W
R3	6028A	0698-6393	Resistor 585Ω 1% 1/8W
R4	All	0683-1035	Resistor 10KΩ 5% 1/4W
R5	6023A	0698-7880	Resistor 28.7KΩ 1% 1/8W
R5	6028A	0699-0774	Resistor 6.65KΩ 1% 1/8W

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Contents Autoranging Certification Safety Summary Safety Symbol Definitions Printing HistoryTable of Contents Replaceable Parts Safety Considerations TroubleshootingCircuit Diagrams ScopeManual Revisions Item DescriptionTest Equipment Required Calibration ProcedureIntroduction Operation Verification TestsType Required Characteristics USE Recommended Model Test Equipment RequiredInitial Setup 1KVACalibration Procedure MONVout IoutMeasurement Techniques Performance TestsCR7 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 ProceduresVdc Control Board Test Connector, A2J7PIN no Signal Name WAVEFORM/CONDITIONS SourceRepair and Replacement Electrostatic ProtectionA2 Control Board Removal A3 Front-Panel Board Removal A4 Power Mesh Board RemovalOverall Troubleshooting Procedure A1 Main Board RemovalNode Using the TablesSetup MeasurementMain Troubleshooting Setup Main Troubleshooting SetupModified Mains Cord Set For Troubleshooting Troubleshooting No-Output Failures Front-Panel TroubleshootingA2J7-26 A2J7-25 PWM-ON PWM-OFF Defective Check Functional CircuitsBoard Symptoms Defective Check Functional Circuits Board Troubleshooting Bias SuppliesSymptoms Defective Circuit Check Components Node + Measurement SourceMeasurement Source Node +Node + N0DE Setup Measurement Source Power Section BlocksTroubleshooting AC-Turn-on Circuits Setup MeasurementRelay Enable Troubleshooting PWM & ClockPower Limit PWM-ON Troubleshooting DC-To-DC Converter+ OUT PWM-OFFTroubleshooting CV Circuit Troubleshooting CC CircuitTroubleshooting OVP Circuit Troubleshooting Down ProgrammerA4U4OUT 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 CircuitOvervoltage Protection OVP Circuit Power-Limit ComparatorConstant-Current CC Circuit Control-Voltage ComparatorBias Voltage Detector Initial-Ramp CircuitPulse-Width Modulator PWM AC-Surge Dropout DetectorSecond-Delay Circuit Display CircuitsPage Replaceable Parts Reference DesignatorsOrdering Information Description AbbreviationsCR2 Electrical PartsCR1 CR3XA2P2 XA2P1Mechanical Parts Control Board Assembly CR3 Page Page Page VR4 VR3VR5 DS1 CR5DS5 VR1 IC A/D Cmos 3-1/2 DGTVR2 NPN SI PfetTS1 Chassis ElectricalA3 Board Mechanical Parts A1TB1A2 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 General Information SpecificationsOption 002 Hardware Output Impedance 10.2 k ohm ± 5% Temperature Coefficient Table A-1. Specifications, Option Remote ProgrammingInput Compliance Voltage ± Current Programming Enable Status IndicatorsMaximum Output Voltage logic high + Remote Trip and Remote Reset TimingPower-on Preset On State logic lowShort Circuit Output Current Table A-1. Specifications, Option Pulse TimingBias Supplies DC Output Ratings 25C ± 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 101Logic Symbols and Definitions 102 Indicator and Qualifier SymbolsOLD Symbol NEW Symbol 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 6028A Model 6023A107 From 108