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I am working on our Keithly 6487 - that has failed. The OCOMP indicator is on and I get the accompanying CMPL indicator. I have removed all cables. I measured -3.47Vdc at power up on the V-source output terminals and around 400mV when I change currentl limit.
After Googling the problem it seems to be quite common...
I believe if I had the power board schematic I would stand a chance of troubleshooting the problem and repairing the unit but so far I have not been able to locate it.
- Keithley Applications
- Posts: 2849
- Joined: June 10th, 2010, 6:22 am
- Country: United States
Because of IP issues Keithley does not give out the schematics of the instrumentation.
I would recommend you contact the service department.
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