Electronics > Repair
Keithley 2001 butchery and cosmetic repair help
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CM:
I replaced the caps in my Keithley 2001, as they are probably decade old caps.  I stuck with what were originally in the unit, the Nichicon high temp 105 degree UVZ caps.  I guess Keithley chose those for thermal stability.  I did increase the voltage rating for caps C116 and C117 fromt 35V to 50V (the same as C108), as the bootstrap voltage can be as high as 39V, and from what I've seen, leaking with severe damage occurs around those caps.  I also increased the voltage rating on the caps to the digital board (C624, C630 and C633), as I observed a little leaking around C624.  Also, I had some broken Molex connectors.  If you need to replace the analog board connectors, the part numbers are 26-60-4030 (for the three pin connector) and 26-60-4050 (for the 5 pin).  You have to remove the center pin of the new 3 pin connector. 
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