Agilent Technologies AGILENT MODELS 6023A and 6028A guide

Ordering Information

To order a replacement part, address order or inquiry to your local Agilent Technolgies sales office. Specify the following information for each part: Model, complete serial number, and any option or special modification (J) numbers of the instrument; Agilent part number; circuit reference designator; and description. To order a part not listed in Table 5-3, give a complete description of the part, its function, and its location.

Table 5-2. Description Abbreviations

ADDR	Addressable
ASSY	Assembly
AWG	American Wire Gauge
BUFF	Buffer
CER	Ceramic
COMP	Carbon Film Composition
CONV	Converter
DECODER/DEMULTI	Decoder/Demultiplexer
ELECT	Electrolytic
EPROM	Erasable Programmable Read-Only Memory
FET	Field Effect Transistor
FF	Flip-Flop
FXD	Fixed
IC	Integrated Circuit
INP	Input
LED	Light Emitting Diode
MET	Metalized
MOS	Metal-Oxide Silicon
OP AMP	Operational Amplifier
OPTO	Optical
OVP	Over Voltage Protection
PCB	Printed Circuit Board
PORC	Porcelain
POS	Positive
PRIOR	Priority
ROM	Read-Only Memory
RAM	Random Access Memory
RECT	Rectifier
REGIS	Register
RES	Resistor
TBAX	Tube Axial
TRIG	Triggered
UNI	Universal
VAR	Variable
VLTG REG	Voltage Regulator
WW	Wire Wound

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Agilent Technologies AGILENT MODELS 6023A and 6028A service manual Ordering Information, Description Abbreviations

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 Performance Tests Measurement TechniquesCR7 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 PWM-ON PWM-OFF Defective Check Functional Circuits A2J7-26 A2J7-25Board Symptoms Defective Check Functional Circuits Board Troubleshooting Bias SuppliesSymptoms Defective Circuit Check Components Node + Measurement Source Node + Measurement SourceNode + N0DE Setup Measurement Source Power Section BlocksTroubleshooting AC-Turn-on Circuits Setup Measurement Troubleshooting PWM & Clock Relay EnablePower Limit PWM-ON Troubleshooting DC-To-DC Converter+ OUT PWM-OFF Troubleshooting CV Circuit Troubleshooting CC Circuit Troubleshooting Down Programmer Troubleshooting OVP CircuitA4U4OUT 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 XA2P1 XA2P2Mechanical Parts Control Board Assembly CR3 Page Page Page VR3 VR4VR5 CR5 DS1DS5 IC A/D Cmos 3-1/2 DGT VR1VR2 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 Specifications General InformationOption 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 6023A Model 6028A107 From 108