[volt-nuts] Keithley 2001 Multimeter Fault - Update

J. Forster jfor at quik.com
Wed Mar 17 03:12:06 UTC 2010

> I've had a closer look at the 'corrosion' damage from leaked capacitor
> electrolyte using a stereo microscope. Some very fine tracks have been
> completely eaten away in one area, but the path of the track is easy to
> follow in the green solder mask layer making it easy to e bypass with a
> wire.
> Looking in more detail at the 'Heat Damaged Area' I can see that the
> chemical attack from the capacitor leakage is far more advanced. In
> addition
> to copper track, it's eaten right through the solder mask and deeper down
> into the PCB resin leaving bare woven glass fibers visible.

I find it hard to believe anything has eaten the epoxy. It's pretty inert
to almost any chemicals.

> There are vias in this area and I'm concerned there may be internal layer
> connections that are damaged.


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