On Tue, 30 Mar 1999, Russell King - ARM Linux Admin wrote:
> Philip Blundell writes:
> > Changing a surface mount StrongARM isn't impossible. There are plenty of
> > companies who will change that sort of chip for you, and it's possible to hand
> > solder them if you have a steady hand and a magnifier.
> This is something I would strongly not recommend *anyone* even think about
> attempting unless you are experienced at surface mount soldering/desoldering.
> The chances of buggering it up by doing it by hand are close to 95%
That depends greatly on how much experience you have of manual SMT rework.
95% odds of totally ruining is is about right if you've never done any,
I'd give myself about 50% odds of doing some damage, and some of the
people I've worked with in the past, I'd give them about 90% odds of doing
it without damaging it at all.
> PLCC devices are bad enough, PQFP devices are impossible to even solder
> without the right equipment (ie, SMT air iron).
Not quite impossible. You need a microscope, a very fine tipped iron, a
steady hand, a rework pen (basically a pen with thin flux in it), plenty
of solder wick, and _lots_ of patience. It isn't impossible though.
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