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Agilent Technologies
AGILENT MODELS 6023A and 6028A Main Board A1 Component Location
Models:
AGILENT MODELS 6023A and 6028A
1
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Troubleshooting
Specs
Install
Block Diagram Overview
PIN no Signal Name
Second-Delay Circuit
Safety Symbol Definitions
Status Indicators
Maintenance
Power-on Preset
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Figure
6-2.
Main Board (A1) Component Location
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Contents
Autoranging
Certification
Safety Summary
Printing History
Safety Symbol Definitions
Table of Contents
Replaceable Parts
Circuit Diagrams
Troubleshooting
Safety Considerations
Scope
Item Description
Manual Revisions
Introduction
Calibration Procedure
Test Equipment Required
Operation Verification Tests
Test Equipment Required
Type Required Characteristics USE Recommended Model
1KVA
Initial Setup
MON
Calibration Procedure
Iout
Vout
Measurement Techniques
Performance Tests
CR7
Constant Voltage CV Tests
Current-Monitoring Resistor Setup
Basic 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 6028A
Load Transient Recovery Waveform
Constant Current CC Tests
CC Pard Test Setup
Initial Troubleshooting Procedures
Troubleshooting
PIN no Signal Name
Control Board Test Connector, A2J7
Vdc
WAVEFORM/CONDITIONS Source
Electrostatic Protection
Repair and Replacement
A2 Control Board Removal
Overall Troubleshooting Procedure
A4 Power Mesh Board Removal
A3 Front-Panel Board Removal
A1 Main Board Removal
Setup
Using the Tables
Node
Measurement
Main Troubleshooting Setup
Main Troubleshooting Setup
Modified Mains Cord Set For Troubleshooting
Front-Panel Troubleshooting
Troubleshooting No-Output Failures
A2J7-26 A2J7-25
PWM-ON PWM-OFF Defective Check Functional Circuits
Board
Symptoms Defective Circuit Check Components
Troubleshooting Bias Supplies
Symptoms Defective Check Functional Circuits Board
Node + Measurement Source
Measurement Source
Node +
Node + N0DE
Troubleshooting AC-Turn-on Circuits
Power Section Blocks
Setup Measurement Source
Setup Measurement
Relay Enable
Troubleshooting PWM & Clock
Power Limit
+ OUT
Troubleshooting DC-To-DC Converter
PWM-ON
PWM-OFF
Troubleshooting CC Circuit
Troubleshooting CV Circuit
Troubleshooting OVP Circuit
Troubleshooting Down Programmer
A4U4OUT
Waveforms
SET Voltage Vdc Node +
Page
Block Diagram Overview
Autoranging Power
Block Diagram
Simplified Schematic
Simplified Schematic
Down Programmer
DC-to-DC Converter
Constant-Voltage CV Circuit
Pfet Control Signals Timing Diagram
Constant-Current CC Circuit
Power-Limit Comparator
Overvoltage Protection OVP Circuit
Control-Voltage Comparator
Pulse-Width Modulator PWM
Initial-Ramp Circuit
Bias Voltage Detector
AC-Surge Dropout Detector
Display Circuits
Second-Delay Circuit
Page
Reference Designators
Replaceable Parts
Description Abbreviations
Ordering Information
CR1
Electrical Parts
CR2
CR3
XA2P2
XA2P1
Mechanical Parts
Control Board Assembly
CR3
Page
Page
Page
VR4
VR3
VR5
DS1
CR5
DS5
VR1
IC A/D Cmos 3-1/2 DGT
VR2
Pfet
NPN SI
Chassis Electrical
TS1
A2 Board Mechanical Parts
A1TB1
A3 Board Mechanical Parts
A4 Board Mechanical Parts
Option 240 240V Operation
Option 220 220V 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
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General Information
Specifications
Option 002 Hardware
Input Compliance Voltage ± Current Programming Enable
Table A-1. Specifications, Option Remote Programming
Output Impedance 10.2 k ohm ± 5% Temperature Coefficient
Status Indicators
Power-on Preset
Remote Trip and Remote Reset Timing
Maximum Output Voltage logic high +
On State logic low
Bias Supplies DC Output Ratings 25C ±
Table A-1. Specifications, Option Pulse Timing
Short Circuit Output Current
Pard Typical
Connector Assembly Procedure
Installation
Operation
Figure A-1. Mating Connector Assembly
Local/Remote Programming
Resistance Voltage or Current
Figure A-4. Calculating Value of Series Dropping Resistor
Remote Resistance Programming
Figure A-5. Remote Resistance Programming
Remote Monitoring
Remote Control
Status Indicators
Overvoltage
Remote Reset
Figure A-8. Remote Control
Power-On Preset
Multiple Supply System Shutdown
AC Dropout Buffer Circuit
Bias Supplies
Maintenance
Troubleshooting Current Programming
Troubleshooting Resistance and Voltage Programming
Figure A-11. Troubleshooting Current Programming of CV Mode
Figure A-13. Troubleshooting Status Indicators
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REF. Desig Model no Description
Table A-3. Replacement Parts
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101
VR9
OLD Symbol NEW Symbol
Indicator and Qualifier Symbols
Logic Symbols and Definitions 102
Definitions
Schematic Diagram Notes 103
Schematic Notes
Figure A-15. Option 002 Board, Component Location 104
Schematic Notes
Figure A-16. Option 002 Board, Schematic Diagram 105
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Model 6028A
Model 6023A
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