18 Jul
2010
18 Jul
'10
11:28 a.m.
On Sun, 2010-07-18 at 11:14 +0200, fons(a)kokkinizita.net wrote:
On Sat, Jul 17, 2010 at 10:56:47PM -0400, Gene Heskett
wrote:
Fruit acids or pure alcohols are effective and relatively harmless, but
most effective are products by chemical companies, there are cleaners
with qualities comparable to penetrating oil, but made to fit to
electrical properties. Those cleaners will clean, resp. repair and
protect.
Some lubricant obviously made its way in there,
and one would have to
assume that the switched current was sufficient to cause a microscopic
arcing, which will in time create a smoke film on the internals, which is
what you were measuring, and which caused the PSU to think the button was
pressed full time. Lubricants are a good idea only on a circuit that can
be called a dry circuit, where dry=microamp currents at very low voltages.
Ah, yes, these plastic things are often lubricated.
Washing it out with acetone was ok, but I would
probably have reached for a
can of paint thinning alcohol as it is less likely to degrade the plastics.
I know, but the acetone was all I had available...
Ciao,