Re: Repairing a Supermicro P6DLF motherboard
On Wed, 6 Jul 2016, Tothwolf wrote: 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 ^ P6DLF 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.
Re: Repairing a Supermicro P6DLF motherboard
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.
Repairing a Supermicro P6DLF motherboard
I'm currently in the process of repairing a Supermicro P6DLF motherboard which suffered shipping damage and I'm trying to find anyone else who might have one. I can't find any photos of one of these boards online (except for the one I recently purchased) and the board I have shows possible signs of prior rework that I'm trying figure out. 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. If anyone else has one of these boards and can physically check it to see what parts are installed, it would be really helpful. Many of the original Sanyo CG series parts were trashed on my board when it was shipped in one of those thin USPS Priority boxes, so I'm going to end up replacing all of them. If the two OS-CON parts turn out to be not original, I'll fit the correct value parts in those two locations while I'm at it.
