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6033A series
HP 6033A series User Manual
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SERVICE MANUAL
A
UTORA
NGING
SYSTEM DC POWER SUPPLY
HP MODELS 6033A and 6038A
HP Part No. 5959-
3346
FOR INSTRUM
ENTS WITH SERIAL NUMBERS
HP Model 6033A; Serials
US38320231 and above
HP Model 6038A; Serials
US38310401 and above
For instruments with higher serial numbers, a change page may
be included.
Microf
iche Part No. 5959-3347
Printed in USA
: December, 1999
2
Table of Contents
Default Chapter
2
Exclusive Remedies
2
Limitation of Warranty
2
Safety Summary
3
Table of Contents
5
Introduction
9
Scope
9
Calibration and Verification
9
Troubleshooting
9
Principles of Operation
9
Replaceable Parts
9
Circuit Diagrams
9
Safety Considerations
9
Manual Revisions
10
Firmware Revisions
10
Calibration and Verification
11
Introduction
11
Test Equipment Required
11
Operation Verification Tests
11
Calibration Procedure
11
Initial Setup
14
Voltage Monitor Zero Calibration
15
Common Mode Calibration
15
Remote Readback Zero Calibration
16
Constant Voltage Full Scale Calibration
16
Voltage Monitor and Remote Readback Full Scale Calibration
17
Constant Voltage Zero Calibration
17
Current Monitor Zero Calibration
17
Constant Current Zero Calibration
18
Current Monitor Full Scale Calibration
18
Constant Current Full Scale Calibration
19
Power Limit Calibration
19
Resistance Programming Full Scale Calibration
19
Performance Tests
20
Measurement Techniques
20
Constant Voltage (CV) Tests
21
Constant Current (CC) Tests
26
Initialization Procedure
28
Troubleshooting
29
Introduction
29
Initial Troubleshooting Procedures
29
Electrostatic Protection
30
Repair and Replacement
30
A2 Control Board Removal
31
A4 FET Board Removal
31
A8 HP-IB Board Removal
32
A3 Front-Panel Board Removal
32
A1 Main Board Removal
32
Overall Troubleshooting Procedure
33
HP-IB Section Troubleshooting
33
Primary Interface Troubleshooting
36
Secondary Interface Troubleshooting
38
Voltage and Current DAC
38
Readback DAC Circuits
39
Readback Multiplexer (U20)
39
Signature Analysis
41
Primary SA
41
Front Panel SA
41
Secondary SA
42
Power Section Troubleshooting
47
Main Troubleshooting Setup
48
Troubleshooting No-Output Failures
49
Power Section Blocks
50
Troubleshooting AC-Turn-On Circuits
53
Troubleshooting DC-To-DC Converter
53
Troubleshooting Bias Supplies
54
Troubleshooting down Programmer
57
Troubleshooting CV Circuit
58
Troubleshooting CC Circuit
58
Troubleshooting OVP Circuit
59
Troubleshooting PWM & Clock
59
Principles of Operation
61
Introduction
61
HP-IB Board
61
Primary Microprocessor
61
Address Switches
61
Eeprom
63
Isolation
63
Secondary Microprocessor
63
Digital-To-Analog Converters
63
Analog Multiplexer
63
Status Inputs
63
Front Panel Board
64
Address Latches and Decoders
64
Volts and Amps Output Ports and Displays
64
RPG and Latches
64
Front-Panel Switches and Input Port
64
Mode Indicators
66
OVP Adjust Control
66
Power Clear
66
Power Mesh and Control Board
66
Overview
66
AC Turn-On Circuits
68
DC-To-DC Converter
68
Down Programmer
69
Bleeder Circuit (6038A Only)
69
Constant-Voltage (CV) Circuit
69
Constant-Current (CC) Circuit
70
Overvoltage Protection (OVP) Circuit
70
Power-Limit Comparator
70
Control-Voltage Comparator
70
Initial-Ramp Circuit
71
Pulse-Width Modulator (PWM)
71
Bias Voltage Detector
71
AC-Surge-&-Dropout Detector
71
1-Second-Delay Circuit
72
Replaceable Parts
73
Introduction
73
Ordering Information
74
Component Location and Circuit Diagrams
91
L00 Vac Input Power Option 100
99
General Information
99
Description
99
Scope of Appendix A
99
Suggestions for Using Appendix A
99
Chapter 1 Manual Changes
99
Chapter 2 Manual Changes
99
Chapter 3 Manual Changes
101
Chapter 4 Manual Changes
101
Chapter 5 And 6 Manual Changes
102
Blank Front Panel Option 001
103
Introduction
103
Troubleshooting
103
Chapter 2 Manual Changes
103
Chapter 3 Manual Changes
104
Chapter 5 And 6 Manual Changes
104
5
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HP 6033A series Specifications
General
Brand
HP
Model
6033A series
Category
Power Supply
Language
English
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