6 Jul
2016
6 Jul
'16
5:03 p.m.
On Wed, 6 Jul 2016, Tothwolf wrote:
On Tue, 5 Jul 2016, Tothwolf wrote:
^^^^^ P6DLF
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.