On 08/01/2015 09:40 PM, Chuck Guzis wrote:
On 08/01/2015 07:05 PM, Jon Elson wrote:
When repairing CPU motherboards with bad caps, this is a
really big
problem. I dilute the lead-free solder with leaded
solder, this
helps lower the melting point to where two soldering
irons (one on
each side of the board) can be used to clear out the
plated-through
holes. Those are multilayer boards, and way worse.
Ever tried using a fusible alloy such as Chip-Quick? That
can make things very easy to remove without overheating
the PCB. (I use a plain old PAR38 120W spotlight/reflector
to heat things up.
Diluting the tin solder with SnPb works quite well, I have
used this trick many times to fix boards with large ground
planes.
I don't do these sorts of repairs often, so I would lose
special stuff like Chip-Quick and never be able to find it.
Last batch, my boss volunteered me to re-cap a dozen Dell
PCs they were going to trash at work, WITHOUT consulting
with me first!
Jon
