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Keithley
Multimeter
2001
Keithley 2001 Repair Manual
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Troubleshooting
2-111
T
est 409.6 – ÷750 correction factor; signal
comparisons
Pass/Fail
The measurement in step 409.3 is not less than the measur
ement is step 409.6.
Same as test 409.2. Measure the output at
A/D IN.
DC_STB
Registers
R1_STB
Registers
R2_STB
Registers
U801
Q1:
0
Q2:
1
Q3:
1
Q4:
1
Q5:
1
Q6:
0
Q7:
0
Q8:
0
U307
Q1:
1
Q2:
1
Q3:
0
Q4:
1
Q5:
1
Q6:
1
Q7:
1
Q8:
1
U505
Q1:
0
Q2:
1
Q3:
1
Q4:
1
Q5:
0
Q6:
1
Q7:
1
Q8:
0
U800
Q1:
1
Q2:
1
Q3:
0
Q4:
0
Q5:
0
Q6:
0
Q7:
1
Q8:
1
U305
Q1:
1
Q2:
0
Q3:
1
Q4:
0
Q5:
0
Q6:
0
Q7:
1
Q8:
1
U500
Q1:
0
Q2:
1
Q3:
0
Q4:
1
Q5:
1
Q6:
1
Q7:
0
Q8:
0
U300
Q1:
1
Q2:
1
Q3:
1
Q4:
1
Q5:
1
Q6:
1
Q7:
1
Q8:
1
U302
Q1:
1
Q2:
1
Q3:
1
Q4:
1
Q5:
1
Q6:
1
Q7:
1
Q8:
0
U530
Q1:
0
Q2:
0
Q3:
0
Q4:
0
Q5:
0
Q6:
0
Q7:
0
Q8:
0
U303
Q1:
0
Q2:
1
Q3:
1
Q4:
1
Q5:
0
Q6:
1
Q7:
X
Q8:
X
U501
Q1:
1
Q2:
0
Q3:
1
Q4:
1
Q5:
1
Q6:
1
Q7:
X
Q8:
X
Note: T
ables 2-10 through 2-12 provide functional descriptions of the r
egister bits.
T
ype
Failure analysis
Description
Bit pattern
123
125
Table of Contents
Default Chapter
6
Table of Contents
6
1 Routine Maintenance
10
Introduction
10
Line Fuse Replacement
10
Current Fuse Replacement
11
Front AMPS Input Fuse
11
Rear AMPS Input Fuse
11
Routine Maintenance
11
Fan Filter Cleaning
12
Firmware Updates
12
2 Troubleshooting
14
Introduction
14
Repair Considerations
14
Power-On Test
15
Front Panel Tests
15
KEYS Test
15
DISPLAY PATTERNS Test
15
Built-In Test
16
1AUTOMATIC Testing2-6
19
MANUAL Testing
19
Diagnostics
20
R1_STB and R2_STB Shift Registers
24
Display Board Checks
27
Power Supply Checks
27
Documentation
28
Table 2-9 Power Supply Checks
28
Display Board Circuit Theory
30
Power Supply Circuit Theory
30
Built-In Test Documentation
31
Table
32
Table
33
Troubleshooting
34
Table
34
Table 2-13 Multiplexer (U511)
35
Solder Repairs
131
Special Handling of Static Sensitive Devices
131
Case Cover and Shield Removal
131
Case Cover Removal
131
Analog Board Top Shield Removal
132
PC-Boards Removal
132
Digital Board
132
A/D Converter Board
132
Analog Board
133
Front Panel Disassembly
134
Cooling Fan Removal
134
Main CPU Firmware Replacement
134
Instrument Re-Assembly
135
Assembly Drawings
135
4 Replaceable Parts
136
Introduction
136
Parts Lists
136
Ordering Information
136
Factory Service
136
Table
137
Model 2001 A/D Board, Parts List
137
Table
140
Model 2001 Analog Board, Parts List
140
Table
150
Model 2001 Digital Board, Parts List
150
Table
154
Model 2001 Miscellaneous, Parts List
154
Other manuals for Keithley 2001
Operator's Manual
488 pages
Calibration Manual
107 pages
Quick Reference Guide
94 pages
5
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Keithley 2001 Specifications
General
Brand
Keithley
Model
2001
Category
Multimeter
Language
English
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