28 Oct
2017
28 Oct
'17
10:26 a.m.
Hello Rob,
That 4700uF/10V capacitor is really hard to remove, it
seem to be connected
to large planes on both sides, which suck all the heat away. I have a
suspicion that it may have leaked from the underside as the area around it
is certainly quite dirty in a way that suggest the dirt has stuck to
something.
Did you manage to remove this part without destroying it and without
damaging the board?
Yes, in all cases. I didn't recall any issues with unsoldering this part
really, using a simple 40W iron and desoldering wick only, and extra flux
from a pen.
Getting the part out once unsoldered was in my case a bit tricky once or
twice because of the daugthercard sitting next having a 220uF/16V KMC part
on the daugthercard blocking the 4700uF/10V from the above, but it was
eventually doable with some manoeuvre; their position WRT each other seems
to vary a bit between individual H7826s and from your photo I infer you
have one where this won't be a problem.
BTW I chose a Panasonic FR as a replacement (Farnell has them), leaving
considerably more space around (make sure you pick the right diameter if
you choose this part too, as there are two variants at this capacitance
and voltage).
Unfortunately lone recapping didn't fix my worst leaked H7826s, I yet
need to track down what else has failed. :(
Maciej