Agilent Technologies AGILENT MODELS 6023A and 6028A specification

0.25Ω (6023A)

2.0Ω (6028A)

load resistor that is capable of safely dissipating 250 watts. Proceed as follows:

a.Connect the test equipment as shown in Figure 2-8.

b.Switch the unit's power on and turn the output voltage all the way up.

c.Turn up output current to: 29.0Vdc (6023A)

10Vdc (6028A)

Check that the unit's CC LED remains lighted.

d.Check that the rms noise current measured by the current probe and rms voltmeter is no more than: 15mA rms (6023A).

5mA rms (6028A)

Figure 2-8. CC PARD Test Setup

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Agilent Technologies AGILENT MODELS 6023A and 6028A service manual CC Pard Test Setup

Contents

Autoranging Certification Safety Summary Safety Symbol Definitions Printing History Table of Contents Replaceable Parts Safety Considerations TroubleshootingCircuit Diagrams Scope Manual Revisions Item Description Test Equipment Required Calibration ProcedureIntroduction Operation Verification Tests Type Required Characteristics USE Recommended Model Test Equipment Required Initial Setup 1KVA Calibration Procedure MON Vout Iout Measurement Techniques Performance TestsCR7 Current-Monitoring Resistor Setup Constant Voltage CV Tests Basic 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 Pard Load Transient Recovery Waveform Constant Current CC Tests CC Pard Test Setup Troubleshooting Initial Troubleshooting Procedures Vdc Control Board Test Connector, A2J7PIN no Signal Name WAVEFORM/CONDITIONS Source Repair and Replacement Electrostatic Protection A2 Control Board Removal A3 Front-Panel Board Removal A4 Power Mesh Board RemovalOverall Troubleshooting Procedure A1 Main Board Removal Node Using the TablesSetup Measurement Main Troubleshooting Setup Main Troubleshooting Setup Modified Mains Cord Set For Troubleshooting Troubleshooting No-Output Failures Front-Panel Troubleshooting A2J7-26 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 Source Measurement Source Node +Node + N0DE Setup Measurement Source Power Section BlocksTroubleshooting AC-Turn-on Circuits Setup Measurement Relay Enable Troubleshooting PWM & ClockPower Limit PWM-ON Troubleshooting DC-To-DC Converter+ OUT PWM-OFF Troubleshooting CV Circuit Troubleshooting CC Circuit Troubleshooting OVP Circuit Troubleshooting Down ProgrammerA4U4OUT Waveforms SET Voltage Vdc Node + Page Autoranging Power Block Diagram Overview Block Diagram Simplified Schematic Simplified Schematic DC-to-DC Converter Down Programmer Pfet Control Signals Timing Diagram Constant-Voltage CV Circuit Overvoltage Protection OVP Circuit Power-Limit ComparatorConstant-Current CC Circuit Control-Voltage Comparator Bias Voltage Detector Initial-Ramp CircuitPulse-Width Modulator PWM AC-Surge Dropout Detector Second-Delay Circuit Display CircuitsPage Replaceable Parts Reference Designators Ordering Information Description Abbreviations CR2 Electrical PartsCR1 CR3 XA2P2 XA2P1Mechanical Parts Control Board Assembly CR3 Page Page Page VR4 VR3VR5 DS1 CR5DS5 VR1 IC A/D Cmos 3-1/2 DGTVR2 NPN SI Pfet TS1 Chassis Electrical A3 Board Mechanical Parts A1TB1A2 Board Mechanical Parts A4 Board Mechanical Parts Option 220 220V Operation Option 240 240V Operation Component 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 Indicators Maximum Output Voltage logic high + Remote Trip and Remote Reset TimingPower-on Preset On State logic low Short Circuit Output Current Table A-1. Specifications, Option Pulse TimingBias Supplies DC Output Ratings 25C ± Pard Typical Installation Connector Assembly Procedure Figure A-1. Mating Connector Assembly Operation Local/Remote Programming Resistance Voltage or Current Remote Resistance Programming Figure A-4. Calculating Value of Series Dropping Resistor Figure A-5. Remote Resistance Programming Remote Monitoring Status Indicators Remote Control Remote Reset Overvoltage Power-On Preset Figure A-8. Remote Control AC Dropout Buffer Circuit Multiple Supply System Shutdown Maintenance Bias Supplies Troubleshooting Resistance and Voltage Programming Troubleshooting Current Programming Figure A-11. Troubleshooting Current Programming of CV Mode Figure A-13. Troubleshooting Status Indicators Page Table A-3. Replacement Parts REF. Desig Model no Description 100 VR9 101 Logic Symbols and Definitions 102 Indicator and Qualifier SymbolsOLD Symbol NEW Symbol Definitions Schematic Notes Schematic Diagram Notes 103 Schematic Notes Figure A-15. Option 002 Board, Component Location 104 Figure A-16. Option 002 Board, Schematic Diagram 105 Page Model 6028A Model 6023A107 From 108