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6622A
Agilent Technologies 6622A User Manual
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Figure 6-5. Output 1 & 2 80W Board, Component Location
6
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2
1
144
146
Table of Contents
Default Chapter
2
Exclusive Remedies
2
Limitation of Warranty
2
Safety Summary
3
Table of Contents
5
Section I
9
Introduction
9
Scope
9
Safety Considerations
9
Instrument and Manual Identification
9
Firmware Revisions
10
Principles of Operation
11
Introduction
11
Overall Block Diagram Description
11
AC Input Circuits
11
GPIB Board
11
Front Panel
11
Output Board
11
GPIB Board (Figure 2-3)
13
GPIB Interface
13
System Microcomputer
14
Output Boards Interface
14
Front Panel Interface
15
Bias Supply and Start up
15
Output Board
17
Secondary Interface Circuits
17
Power Mesh and Control Circuits
20
Typical Output Range Characteristics
25
Verification
29
Introduction
29
Test Equipment Required
29
Operation Verification Tests
29
Performance Tests
29
Measurement Techniques
29
Constant Voltage (CV) Tests
32
Constant Current (CC) Tests
38
Extended Tests
41
Output Drift Tests
41
Temperature Coefficient (Tc) Tests
42
Output Voltage and Readbauk Voltage TC
42
Output Current and Readback Current TC
43
Negative Current Limit (-CC) Readback TC
43
Troubleshooting
46
Introduction
46
Electrostatic Protection
46
Removal and Replacement
47
Top Cover Removal
47
Gaining Access to Assemblies in the Supply
47
GPIB Board Removal
47
Watt Output Board Removal
47
Replacing the Power Module U338 (U339)
49
Front Panel Removal
49
Chassis Mounted Components
50
Test Equipment Required
50
Fuse Replacement
50
Procedures
52
Initial Troubleshooting and Board Isolation Procedures
53
Power-On Self Test
53
Connector P201 Jumper Positions
54
ERROR Codes and Messages
54
Gpib Board and Front Panel Troubleshooting Procedures
58
Test Setup
58
Post Repair Calibration
58
Setting the Model Number (MODEL Command)
58
Signature Analysis Testing
59
Test Setup for S.A
59
Firmware Revisions (ROM? Command)
59
Output Board Troubleshooting Procedures
75
Test Setup
75
Post Repair Calibration
75
Self Exercise Routine on the Output Board
75
Troubleshooting Analog Multiplexer U323 and
94
Understanding and Troubleshooting the Signal Processor U327
95
Power Module Signal
99
Miscellaneous Trouble Symptoms and Remedies
99
Replaceable Parts
104
Introduction
104
How to Order Parts
104
Abbreviations
105
Federal Manufacturer Codes
106
Fuses
107
GPIB Board Parts List
111
Output Board Parts List
113
Circuit Diagrams
127
Power Distribution Schematic
131
GPIB Board, Component Location
133
GPIB Board, Schematic Diagram
134
Output 1 & 2 Board, Component Location
135
Output 1 & 2 Board, Schematic Diagram
136
Output 3 & 4 Board, Component Location
140
Output 3 & 4 Board, Schematic Diagram
142
Output 1 & 2 80W Board, Component Location
145
Output 1 & 2 80W Board, Schematic Diagram
146
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Agilent Technologies 6622A Specifications
General
Brand
Agilent Technologies
Model
6622A
Category
Power Supply
Language
English
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