Re: An appeal for decency.


"Nedlar" <realham@xxxxxxxxxxxxxxxxx> wrote in message
news:tcaam3prusohjvo735od203030r2kdea3m@xxxxxxxxxx
On Sun, 16 Dec 2007 09:51:07 GMT, "Brian Reay" <see@xxxxxxxxxxxxxxx>
wrote:


Cut the legs and remove the "stubs" of leg one at a time. Slow but
controlled. The body is probably glued to the PCB (the glue hold the IC in
place during manufacture). You can melt the glue with direct hot air flow
onto the IC. Clean up the area with great care- repairing damaged PCB
tracks
is fiddly in the extreme.

Another method which has worked succesfully for me is to thread a
small, strong wire beneath the row of pins. Solder one end to an area
of the pcb that will allow a good joint to be made. Then pull up
gently on the unsoldered end while using the soldering iron on the
first pin. Continue all round the IC.

That is neat.

You need a fine touch (which I lack these days), a good light, and a good
soldering iron.

A magnifier helps too!

One of those ones with an annular tube is best. Soldering under the
magnifier is an acquired skill. For the infrequent user, soldering without
the magnifier and then inspection with it, is easier.

With modern equipment, most people will see faults so infrequently that they
won't see enough of them to hone their skills. I used old mobilephone to
practice on.
I used to do repairs for fellow amateurs but, even then, didn't have to do
that many SMD IC replacements. These days, I'd probably tackle a repair for
myself but not risk someone else's equipment- the "feel" in my right hand
isn't good enough to risk damaging someone else's kit.


--
73
Brian, G8OSN
www.g8osn.org.uk

Check out: http://www.durhamconcerto.com/
Great music to celebrate a great University and City

Now your amateur licence is free, why not send at least £15 per year to
support the
Radio Communications Foundation or STELAR?



.

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