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Jim Thompson[_3_] Jim Thompson[_3_] is offline
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Default Hacking a PCB: How to Remove Coating

On Sun, 1 Jul 2012 22:08:43 -0400, "Martin Riddle"
wrote:


"Jim Thompson" wrote
in message ...
On Sun, 1 Jul 2012 20:07:05 -0400, "Martin Riddle"
wrote:


"Jim Thompson"
wrote
in message ...
Hacking a Park-Zone POS to make it work accurately, I find the PCB
has
a relatively thick clear coating.

What's the best way to remove the coating without damaging
components?

Thanks!

...Jim Thompson

I've used lacquer thinner with success on the red conformal coating.
The
only thing is that it will attack some plastics and wipe the numbers
off
of glass diodes.

Cheers


Coating is clear. Looks like it was just poured over areas with
semiconductors.

...Jim Thompson


It may be Humiseal http://www.humiseal.com/
But there are others, and they come in different chemistries, Acrylic,
Polyurethane, Silicone, UV cure

Try Acetone or Lacquer thinner in a corner and see if it softens it up.
Hopefully it's not the UV cure.

Cheers



Haven't been to the hardware store yet, but tried some Xylene I had on
hand... just puddles up and does nothing. I _can_ dent it _slightly_
with my fingernail.

I can get Acetone or MEK or Lacquer thinner at the hardware store. Any
ideas which to try?

...Jim Thompson
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