Keithley 2000 Repair Manual

List of Tables
1
Routine Maintenance
Fuse rating ...........................................................................................1-3
2
Troubleshooting
Power supply circuits...........................................................................2-7
Display board checks.........................................................................2-11
Power supply checks..........................................................................2-11
Digital circuitry checks......................................................................2-12
DCV signal switching........................................................................2-13
ACV and FREQ signal switching......................................................2-13
Ω 2 signal switching...........................................................................2-14
Ω 4 signal switching...........................................................................2-14
Ω 2/ Ω 4 reference switching................................................................2-15
DCA signal switching........................................................................2-15
ACA signal switching........................................................................2-15
DCV signal multiplexing and gain ....................................................2-16
ACV and ACA signal multiplexing and gain.....................................2-16
DCA signal multiplexing and gain ....................................................2-16
Ω 2 signal multiplexing and gain........................................................2-16
Ω 4 signal multiplexing and gain........................................................2-17
Circuit section location for switching devices...................................2-17
Built-In Test summary .......................................................................2-19

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