Lou -

I'd be a bit reluctant to clean the socketed items: sockets and the like
tend to provide a labyrinth which holds fluids.  In most cases, these fluids
will finally evaporate, but the residue will be what ever suspended solids
were present in the fluid during its previous life.  This will be a
combination of the basic fluid chemistry AND whatever else was present.  The
opportunity to generate some real unpleasant stuff is considerable,
particularly if this hardware ends up in any form of moist or high humidity
environment.

You might do well to solicit the services of CSL or a similar prior to
making a move in any direction.

Regards - Kelly

-----Original Message-----
From: Lou Hart <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: Friday, September 08, 2000 4:26 PM
Subject: [TN] CLeanable components


TechNetters,

We have here some assemblies that were in a building (a customer's, not
ours) that leaked during a rain storm.  Various portions of them have a
dirty deposit that is curiously tenacious, by which I mean it is easily
scraped off, but cannot be removed by blowing or light wiping.

We are considering running the assemblies through our conveyorized cleaning
process, but are not sure which components can tolerate it.  The wash
solution is a 130 F, 9% solution of monoethanolamine (we use an RMA flux).
130 F water rinse follows.

May I get some advice about what to do with these components?  Can they go
through our cleaning process?


DIPs in sockets
Pin Grid Arrays in sockets
Quad pack ICs in tin contact sockets
'D' connectors, male (I think that's what they're called, they have a metal
shell sticking out around the pins)
DIN connectors, male and female (rectangular, grey plastic housing)
LEDs in plastic housings
"Cannon" connectors, male (if that is the correct terminology, they have
heavy pins sticking in an array out of a plastic block)

Thanks for any comments.

Lou Hart
Compunetix
Quality Assurance
412-858-6184

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