Keithley 2000 Repair Manual

Table of Contents
1
Routine Maintenance
Introduction..........................................................................................1-2
Setting line voltage and replacing fuse................................................1-2
AMPS fuse replacement ......................................................................1-4
2
Troubleshooting
Introduction..........................................................................................2-2
Repair considerations...........................................................................2-3
Power-on test .......................................................................................2-3
Front panel tests...................................................................................2-4
Principles of operation.........................................................................2-5
Display board checks.........................................................................2-11
Power supply checks..........................................................................2-11
Digital circuitry checks......................................................................2-12
Analog signal switching states...........................................................2-13
Built-In Test overview .......................................................................2-18
Built-In Test documentation ..............................................................2-22
3
Disassembly
Introduction..........................................................................................3-2
Handling and cleaning.........................................................................3-3
Static sensitive devices ........................................................................3-4
Assembly drawings..............................................................................3-4
Case cover removal..............................................................................3-5
Changing trigger link lines ..................................................................3-6
Motherboard removal ..........................................................................3-7
Front panel disassembly ......................................................................3-8
Main CPU firmware replacement........................................................3-9
Removing power components ...........................................................3-10
Instrument re-assembly......................................................................3-12
4
Replaceable Parts
Introduction..........................................................................................4-2
Parts lists..............................................................................................4-2
Ordering information...........................................................................4-2
Factory service.....................................................................................4-3
Component layouts..............................................................................4-3
A
Specifications
............................................................................................................A-1

Keithley 2000 Specifications

General

Digits	6.5
DC Voltage Range	100 mV to 1000 V
AC Voltage Range	100 mV to 750 V
Resistance Range	100 Ω to 100 MΩ
Connectivity	IEEE-488 (GPIB)
Display Type	VFD