[sdiy] mis-soldered IC....

[patchell]

    Be extremely careful when removing the chip.  The 9700 has double sided
plated thru hole boards.  If you do not completely suck the solder out, you may
end up pulling the copper barrel out of the hole.  In general, it is best to
destroy the old chip and replace with a new one (I realize there is nothing
wrong with the backwards chip, yet, since you have not powered up, but, it is a
lot easier replacing the chip with a new one as opposed to replacing the PC
board).  You will still need a solder sucker.

    This is what I do.  Use a pair of cutters to cut the body of the IC out.
Heat up each pin and pull out one at a time.  Then use a solder sucker to clean
the holes out.

    This is probably a good thing to do anyway...half the time when I unsolder
a chip from a board, the process ends up damaging the chip anyway.

    But, of course...these are just my opinions.

Hallvard Tangeraas wrote:

> At 22:41 -0600 03-07-02, Tom FitzGibbon wrote:
>
> >i am working on a paia 9700 kit and I soldered in an IC backwards.
> >Argh!..... is there anything i can do
> >to remove it, i havnt been able to heat up all the pins at once. is there
> >any chance of saving the chip?
>
> Sure! But as with anything else you need to have the right tools.
> I use a "solder sucker" (not sure if that's the right name) -a spring
> loaded "pump" which you apply over the heated IC leg, and when the solder
> is melted you press the spring-button and the melted solder is sucked away!
>
> Repeat this until all the solder from each leg is removed, and you should
> be able to remove the IC and solder it in the right way (I prefer using IC
> sockets most of the time, even though this costs a little extra).
>
> Hallvard
> --
> Notator/Creator SL : <http://www.notator.org>
> Atari Launchpad    : <http://launchpad.atari.org>

--
 -Jim
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