Quadra 950 (Delta SMP-291AB) Power Supply Recap

[dschnur]

Quadra 950 Power Supply, Input Board:

This one had two leaking caps. Unfortunately, Delta populated C905A and C905B with 16 V, 1000 µF Rubycon VXB electrolytics, a series so prone to leakage that Rubycon later advised manufacturers to stop using remaining stock.

As for this board, I pulled all the caps, gave it the complete decon treatment, ordered new caps and am waiting on Mouser to catch up after the winter storm.

Similar machines could probably do with a quick inspection before powering them on.

 

[falecore]

How did it work out? Took me a solid 8 hours first time I did a 950 PSU, a little less 2nd time around.

 

[dschnur]

How did it work out? Took me a solid 8 hours first time I did a 950 PSU, a little less 2nd time around.

Taking it apart for the first time was a bit complex. It was also pretty dirty, so cleaning it and decontaminating the input board took a little while. The longest part was figuring out appropriate replacements for the caps that were in it. At this point, I am waiting on new caps from Mouser, but they are delayed from the storm a few days ago. My guess about time in total.. Probably 1.5 hours so far. Putting it back together should be quick.

 

[Juror22]

ordered new caps and am waiting on Mouser to catch up after the winter storm

Do you have a list that you can pass along? I have the same PSU, if you would care to share.

 

[dschnur]

Do you have a list that you can pass along? I have the same PSU, if you would care to share.

Let's wait on Mouser. I'd like to test them before I pass the list along.

I found this older list after I ordered mine:

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