Troubleshooting; Troubleshooting Equipment; Troubleshooting Access; Table - Keithley 2000-Scan Instruction Manual

Troubleshooting

Troubleshooting equipment

Table 4-2

Table 4-2
Recommended troubleshooting equipment
Description
Multimeter
Oscilloscope

Troubleshooting access

In order to gain access to the scanner card circuit board to measure voltages under actual
operating conditions, perform the following steps:
1.
2.
3.
WARNING
4.
5.
6.
summarizes recommended equipment for troubleshooting the Model 2000-SCAN.
Manufacturer and model
Keithley 2000/2001
TEK 2243
Turn off the Model 2000 power, and disconnect the line cord and all other equipment.
If wires are connected to the scanner card, remove the scanner card from the multimeter.
Remove the Model 2000 cover as follows:
A. Remove the handle by rotating it to align the arrows on the handle mounting ears.
Pull out and remove the handle.
B. Remove the screws that secure the handle mounting ears, then remove the ears.
C. Remove the screws that attach the rear bezel to the case, then remove the bezel.
D. Remove the bottom screws that grounds the case to the chassis.
Be sure to install and tighten the grounding screws after replacing the cover.
E. Remove the cover by pulling it off towards the rear.
Disconnect any wires connected to the scanner card terminal blocks.
Install the scanner card in the multimeter.
Connect the line cord, and turn on the power to measure voltages (see following
paragraph).
Service Information
Application
DCV checks
View logic waveforms
4-13