On Tue, 5 Jul 2016, Tothwolf wrote:
The electrolytic capacitors on this particular board
at locations CE1
and CE6 have Sanyo OS-CON 220uF 10V polymer parts (purple sleeve and
appear to be 10SA220M) fitted and the solder work was done by hand. The
joints were completely defluxed/cleaned, but the leads were hand sheared
down into the solder joint. All of the other electrolytic capacitors on
this board are Sanyo CG series 1000uF 16V (green) that were wave
soldered.
I suspect two of the Sanyo CG series parts were replaced at some point
by a prior owner with the SA series polymer parts. According to the SA
series datasheet, the largest 10mm diameter part is 220uF 10V, which may
be why those were installed. I haven't used one of these boards since
the late '90s when I built a workstation with one, and I can't remember
with 100% certainty that Supermicro didn't use a few polymer parts on
these boards.
I've been able to confirm that CE1 and CE6 on the P6DLH motherboard should
be 1000uF 16V just like all the other Sanyo CG series capacitors on the
board. I have no idea why someone replaced those two on this particular
board with 220uF 10V OS-CON polymer parts (which are in parallel with
other original 1000uF capacitors), but I'll install the correct value for
those two capacitors when I replace the others.