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September 1998

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Subject:
From:
Jim Marsico 516-595-5879 <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Fri, 4 Sep 1998 14:33:00 -0400
Content-Type:
TEXT/PLAIN
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TEXT/PLAIN (35 lines)
Well, here's one for the books...  We have two in-circuit testers located next
to each other.  Last week, during the night, an air-conditioning unit located
in the ceiling directly above the testers sprung a leak, dumping a couple of
gallons of ethylene glycol (heat transfer fluid) on the testers.  (It seems
that the occasional condensation from the air-conditioner warranted a plastic
sheet be placed under the unit, above the ceiling tiles.  So when the leak
started, it collected in the plastic until the ceiling gave out!)

Now, the questions:

1) The internal circuit boards plug into a mother board, so they can be removed
easily.  Cleaning the boards in a saponified solution resulted in a white haze
on the boards.  What might this be?

2) The boards were cleaned, but only half are working properly.  We expect some
residue is left behind in some connectors.  What is the best way to clean these
boards?

3) What is the long-term problem expected if residue is left behind?

Thanks for your help,
ICTless in NY

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