Electronics > Repair
Keithley 2001 Repair (Bad Capacitors)
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BennoG:
sorry mine is from 2011 (repaired for parts from e-bay).

But remove all the charred pcb because the carbon in it will conduct current and burn down your PCB, do not leave any trace of carbon on the pcb.

I learned the hard way on an TDK lambda the hard way. The pcb has now a hole of 2 x 2 cm (1 x 1 inch) and flying wires to the bridge rectifier. (sorry could not find a photo of the hole)

Benno
bastl_r:

--- Quote from: jonsikul on October 19, 2024, 06:56:05 pm ---Bastl_r,

I am not sure if this question is for me or not, but the space is 5mm

--- End quote ---
Thank you.
I has a 2002. The powersupply area is maybe the same and and I would like to replace the capacitors before they leak. But I don't want to remove the mainboard unnecessarily, so I'll just rely on your information.
Where can I send the invoice if the information was wrong?  ;) Joke...

regards
derZockerMP:
Hello, your PCB looks like mine: broken :-BROKE. But I didn't repair mine because of a broken transformer. Then I received an even more broken unit with a faulty AD converter. I can provide some X-rays of the PCB if necessary.
jonsikul:
An X-ray would be really valuable and appreciated. Attached is a photo of my current board as I believe I have removed all the charred part as Benno mentioned. With my mill I have found 1 trace on a middle layer that I need to find out where it goes. It is thick so I guess it's a power trace. I am afraid there are some very thin that I haven't seen, so an X-ray might help with that.
Next step for me would be to try and connect any middle layers and fill with epoxy.

How did you find out your transformer was broken? Did you just measure the windings with an ohmmeter or do you see some visual problems?
BennoG:
what happened to U509 looks like cracked
Benno
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