On 11/02/2017 03:09 AM, Marcus Bowman wrote:
If there are plug-in cards or gold plated edge connectors anywhere, unplug, rub
with an eraser, dust clean and re-insert. Might help remove stray capacitance.
I've just had trouble with a set of plug-in cards on a machine here (not
control cards, but the same principle applies).
Marcus
You really don't want to use an eraser on gold plated contacts. The
gold plating is quite thin, and the eraser will wear it away. Much
better to use alcohol and something like a coffee filter or non-clay
based paper to clean up the oxidation. Especially on the female
contacts where you will inevitably leave eraser residue. Once that's
accomplished insert and remove the card into the slot several times.
Erasers have fine grit mixed in with the rubber and act just like
sandpaper. Not good for gold plating.
Mark
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