Agilent Technologies
AGILENT MODELS 6023A and 6028A
service manual
Troubleshooting
Specs
Install
Block Diagram Overview
PIN no Signal Name
Second-Delay Circuit
Safety Symbol Definitions
Status Indicators
Maintenance
Power-on Preset
Page 52
Page 51
Page 53
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Page 51
Page 53
Contents
Autoranging
Certification
Safety Summary
Safety Symbol Definitions
Printing History
Table of Contents
Replaceable Parts
Troubleshooting
Circuit Diagrams
Safety Considerations
Scope
Manual Revisions
Item Description
Calibration Procedure
Introduction
Test Equipment Required
Operation Verification Tests
Type Required Characteristics USE Recommended Model
Test Equipment Required
Initial Setup
1KVA
Calibration Procedure
MON
Vout
Iout
Measurement Techniques
Performance Tests
CR7
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
Control Board Test Connector, A2J7
PIN no Signal Name
Vdc
WAVEFORM/CONDITIONS Source
Repair and Replacement
Electrostatic Protection
A2 Control Board Removal
A4 Power Mesh Board Removal
Overall Troubleshooting Procedure
A3 Front-Panel Board Removal
A1 Main Board Removal
Using the Tables
Setup
Node
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 Circuits
Board
Troubleshooting Bias Supplies
Symptoms Defective Circuit Check Components
Symptoms Defective Check Functional Circuits Board
Node + Measurement Source
Measurement Source
Node +
Node + N0DE
Power Section Blocks
Troubleshooting AC-Turn-on Circuits
Setup Measurement Source
Setup Measurement
Relay Enable
Troubleshooting PWM & Clock
Power Limit
Troubleshooting DC-To-DC Converter
+ OUT
PWM-ON
PWM-OFF
Troubleshooting CV Circuit
Troubleshooting CC Circuit
Troubleshooting OVP Circuit
Troubleshooting Down Programmer
A4U4OUT
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
Power-Limit Comparator
Constant-Current CC Circuit
Overvoltage Protection OVP Circuit
Control-Voltage Comparator
Initial-Ramp Circuit
Pulse-Width Modulator PWM
Bias Voltage Detector
AC-Surge Dropout Detector
Second-Delay Circuit
Display Circuits
Page
Replaceable Parts
Reference Designators
Ordering Information
Description Abbreviations
Electrical Parts
CR1
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
NPN SI
Pfet
TS1
Chassis Electrical
A1TB1
A2 Board Mechanical Parts
A3 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
Specifications
Option 002 Hardware
Table A-1. Specifications, Option Remote Programming
Input Compliance Voltage ± Current Programming Enable
Output Impedance 10.2 k ohm ± 5% Temperature Coefficient
Status Indicators
Remote Trip and Remote Reset Timing
Power-on Preset
Maximum Output Voltage logic high +
On State logic low
Table A-1. Specifications, Option Pulse Timing
Bias Supplies DC Output Ratings 25C ±
Short Circuit Output Current
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
Indicator and Qualifier Symbols
OLD Symbol NEW Symbol
Logic Symbols and Definitions 102
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 6023A
107
From
108
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