5 Jun
2006
5 Jun
'06
9:20 p.m.
dave06a at dunfield.com wrote:
IMHO, and essential tool if you are serious about doing any kind of
rework is a good desoldering station. Takes a bit of time, but if done
it right, the chip just lifts out with no damage to it or the board. One
of the best investments to my workbench that I ever made....
This only seems to work on "nominal" boards -- 4 layers or
less, respectable annular rings, appropriate thermal reliefs,
etc.
Get a board with fine line rules and lots of thermal mass
on a pin (e.g., an internal power plane that is not
relieved) and you'll stand a good chance of lifting pads,
regardless.
This actually can work to your advantage if you are
designing products and don't want folks dicking with them!
<grin>
Anyway, reseating chips isn't that difficult of a
"fix" anyway...
Well it beats replacing unsocketed chips any day.
Swap-in/swap-out vs.
cut pins off/desolder/clean holes/install new chip/clean more
holes/install/solder/resolder the pad you missed....