Either hot tweezers or a hot air rework station are the best/easiest
ways to remove dead parts. But two fine-tip soldering irons will also
work and are a lot cheaper. The idea is to heat both ends of the part
at once, and when the solder flows, lift or flip the part off. Then,
use some liquid flux and narrow solder wick to suck off the excess
solder, and you should end up with nice smooth pads ready for the
replacement part.
The key thing to avoid damage is to make sure the solder is really
flowing on both pads before you try to lift the part. Sometimes ground
pads have enough thermal mass that it takes a while to get them hot
enough. Be patient.
Good luck!
John
----
On 11/05/2016 03:12 PM, Tom Van Baak wrote:
See C13 in the attached photo. I need to replace some blown caps on a few
boards [1]. In one instance the cap got so hot it melted itself off the board.
Quiet convenient, actually -- it acts like its own fuse -- but I don't think
the 5071 designers had that clever feature in mind.
Having not done SMT before, how should I do it with minimal risk to the very
precious PCB. Or, what equipment should I use this as a good excuse to buy?
Thanks,
/tvb
[0] http://www.imdb.com/title/tt0078788/quotes
[1] http://leapsecond.com/museum/hp5071a/A1-mother.htm
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