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4339B
Agilent Technologies 4339B Service Manual
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Agilent
4339B
High
Resistance
Meter
Service
Manual
SERIAL
NUMBERS
This
manual
applies
directly
to
instruments
with
serial
number
prex
J
P1KD
.
F
or
additional
important
information
about
serial
numbers
,
read
\Instruments
Covered
by
This
Manual"
in
Chapter
1o
f
this
m
anual.
Agilent
P
art
N
o
.
04339-90043
Printed
in
JAP
AN
March
2001
F
ourth
Edition
2
Table of Contents
Table of Contents
11
General Information
15
Introduction
15
Instruments Covered by this Manual
15
Serial Number Label
15
Required Equipment
16
Required Language Extensions
16
Adjustments Introduction
17
Safety Consideration
17
Required Equipment
17
Adjustment Tools
18
Adjustable Components
18
Factory-Selected Components
18
EEPROM Write Protect Switch
18
Related Adjustments
18
Adjustment Program
19
Adjustment Program Flow
19
Program Installation
20
Making a Working Copy
20
De Ning the con Guration
20
Program Execution
20
Adjustments Procedure References
22
Source Voltage Adjustment
22
Equipment
22
Setup
22
Source Voltage Adjustment Setup
22
Ammeter Adjustment
24
Equipment
24
Setup 1/2
24
Ammeter Adjustment Setup
24
Setup 2/2
25
Ammeter Adjustment Setup
25
Assembly Replacement Introduction
27
Ordering Information
27
Restored Exchange Assemblies
27
Replacing the A2 CPU Board Assembly
28
Replaceable Assembly List
28
A2 CPU Board Assembly, Replaceable Assembly List
30
Replaceable Assembly List
30
Replaceable Mechanical Parts List
31
Replaceable Mechanical Parts List
32
Replaceable Mechanical Parts List
33
Replaceable Mechanical Parts List
34
Replaceable Mechanical Parts List
35
Replaceable Mechanical Parts List
36
Disassembly Procedures
37
Tools and Fasteners
37
Cover Removal
37
A1 Main Board Removal
38
Removal Procedure
38
A2 CPU Board Assembly Removal
38
A3 Ammeter Board Assembly Removal
39
Removal Procedure
39
A5 AC Inlet Board Assembly Removal
39
Keyboard Assembly Removal
39
LCD Assembly Removal
40
Removal Procedure
40
Interlock Connector Removal
40
Triaxial Connector Removal
41
Removal Procedure
41
Cable Assembly Connection for Interlock Connector
41
BNC Connector Removal
42
Removal Procedure
42
Cable Assembly Connection for Triaxial Connector
42
Troubleshooting Introduction
43
Safety Considerations
43
Required Equipment
43
After Service Product Safety Checks
44
Theory of Operation
45
Overall Measurement Theory
45
Ohm's Law
45
Overall Block Diagram
46
Analog Section
47
DC Voltage Source Section
48
DC Voltage Source Section Block Diagram
48
Ammeter Section
49
Reference Current Source
49
I-V Converter Block Diagram
49
Digital Section
50
Digital Section Block Diagram
50
Power Supply Section
51
Power Supply Section Block Diagram
51
Troubleshooting
52
Troubleshooting Flow
53
Check Procedure References
54
Check 1, DC-DC Converter Output Voltage
54
DC-DC Converter Output Voltage Check
54
DC-DC Converter Output Voltages (Connected)
54
Check 2, LCD Displays Anything
55
Check 3, LCD Operates Correctly
55
Check 4, any Error Message on LCD
55
Check 5, CPU Related Error Message
55
Check 6, Ammeter Functionality Check
55
Check 7, CPU Power LED Lights
56
Check 8, any Error Code on LED
56
Check 9, CPU Fuse High Lead Voltage
57
Check 10, Fuse and Line Switch
57
Check 11, DC-DC Converter Input Voltage
58
Check 12, DC-DC Converter Open Output Voltages
59
DC-DC Converter Output Connector
59
DC-DC Converter Open Output Voltages
59
Check 13, Transformer Secondary Voltage
60
Manual Changes
61
Default Jumper and Switch Settings
63
Introduction
63
Jumper and Switch Settings
63
Index
65
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Agilent Technologies 4339B Specifications
General
Brand
Agilent Technologies
Model
4339B
Category
Measuring Instruments
Language
English
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