Damn, you scared me with this. I hope you're talking fahrenheit !! Even
600 degree over here (celcius) would do some serious damage to a
surface-mount type board.
Also, whatever temperature you use, use a small tip. I've seen too many
mistakes with people using an iron with a tip the size of a brick !!
Regards, and a Happy Christmas to all. If you don't celebrate Christmas,
that's fine too, but I can still wish you a happy one anyway 'cos I
celebrate it !!
Jon
-----Original Message-----
From: owner-olympus@xxxxxxxxxxxxxxx [mailto:owner-olympus@xxxxxxxxxxxxxxx]
On Behalf Of Joe Gwinn
Sent: 21 December 2001 17:01
To: olympus@xxxxxxxxxxxxxxx
Subject: [OM] Soldering on circuit-boards
I forgot to mention one thing. It's most often not a good idea to use an
800-degree soldering iron on circuit boards, as it may cause the copper pads
to lift away from the board. Use 700-degree or 600-degree. Whatever the
temperature, sufficient soldering will cause the pad to lift.
If you do have a lifted pad, carefully clean it and the board with a
fiberglass brush (to roughen the surfaces) and acetone (to remove any bits
of solder flux), and glue it back down with a tiny dab of 8-hour epoxy glue
spread very uniformly over mating surfaces. Hold the pad down with a bit of
polyethylene film and rubber, pressed down with a clamp or weight. Leave
undistrubed for 24 hours at room temperature. The polyethylene film, to
which the epoxy will not stick, must be between pad/board and rubber.
If the trace to the pad broke, glue pad in place as described above, clean
trace and pad with the fiberglass brush, pre-tin trace and pad, and bridge
the gap by soldering a short piece of pre-tinned wire to trace and pad.
Joe Gwinn
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