25 Oct
2017
25 Oct
'17
7:10 p.m.
On Tue, 24 Oct 2017, Rob Jarratt via cctalk wrote:
Actually I didn't say they have leaked, but I do
say that they could only
have leaked from the bottom, but you can't tell. This does appear to be what
happened to some of the capacitors I had on the other PSU I repaired
recently, although again I can't be sure. However there *is* something on
the board to which dirt and little shards from the heat sinks appears to be
sticking at least a bit, but perhaps it is just dirt that has absorbed
humidity. Certainly the board has been in some kind of humid environment,
the case itself is quite rusty in places. So it is probably more like
someone else suggested, and not capacitor leakage but a humid/damp storage
environment.
This Nichicon PL 4700?F/10V part as well as all the Chemi-Con SXF parts
have certainly leaked in almost all the H7826 PSUs I have (which have been
the worst in this respect), and consequently the PCB has become sticky in
the output filter area. Beware that in addition to the output filters
there's another SXF part just next to the input filter capacitor; it's
visible on one of your photos, next to the lightning bolt sticker.
FWIW,
Maciej