On Fri, 17 Aug 2007 23:19:16 +0100, Eeyore
wrote:



Allodoxaphobia wrote:

It is not of manufacturing origin.

It looks like a (field? post-inspection?) repair -- the replacement
of
"Q200". After soldering, the leads of Q200 have been snipped off
with a
pair of flush wire cutters -- leaving a clean exposure of the
copper of
the leads.

So, the residue is probably dictated by the brand and the quality
of the
solder used in the repair.

That looks possible.

To anyone who knows anything about electronics soldering and or pcb
populating it is very obvious that this IS what happened.