Keithley 2002

Troubleshooting
2-9
ROM
U637, U638
RAM
U635, U636,
U608
NVRAM
U632 - U634
Microprocessor
U631
GPIB
U621 - U623
IEEE - 488 Interface
A/D
Control/Data
A/D Interface
U614
Trigger/Digital I/O
Figure 2-4
Digital board block diagram