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Tue, 13 Mar 2012 21:38:23 +0100 |
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Hi Charlie,
the paper as promised.
Inge
On 13 March 2012 20:42, Charlie Pitarys <[log in to unmask]> wrote:
> I have these PCB's (mixed technology) in house, used for an automotive
> under
> hood application. In several spots on the board are these array of holes.
> On
> the A-side a smt component like a thyristor will cover up the array.
> What are these there for?
> The wave flux residue is proving tenacious to effectively clean out of
> every
> via. Especially with the old school cleaning tool at this account.
>
> Some of the vias are clear but some have solder filling or partially
> filling
> them. These are now also filled with wave flux.
> Below is a link to a picture of the array.
>
> http://i123.photobucket.com/albums/o319/dartfrogmts/Kyzen/A-Side00140xFCR145
> F20min-1.jpg
>
> I'll get them clean but curious as to why these are on the board.
> Thanks in advance
>
> Charlie
>
>
>
>
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