psu question

[yonu]

ok simple question and go ahead and call me stupid I had a psu in one of my servers go out today so I figured before I go pick up a new one I would see if recapping would solve the issue what it is doing and if does it with a MB hooked to it or a psu tester it comes on and will run varying times one time it will run for 2 min the next time for 10 sec I can't find any components that look physically bad so I am at aloss at what to check first.

oh it is a coolmax ap-600x if it is shit please tell me as it came in the case i picked up second had to build the system about 1yr ago

[370forlife]

Re: psu question

coolmax=sirtec

They are usually mediocre at best. Not complete crap, but not good either.

[ratdude747]

Re: psu question

pics please

[yonu]

Re: psu question

hope these help if not let me know I will take others

[momaka]

Re: psu question

From the pics, this one looks okay actually. Heatsinks are okay size. Good sized main transformer. Adequate 5vsb rectifing diode. Fan controller. Adequate primary side filtering.
I can't see the caps on the secondary side, though. Maybe those could be the problem but I can't really see (they sure look like Fuhjyyu though). More pics of the secondary side would be really helpful.
If there's one bulged or leaking capacitor on the secondary side, you'll need to replace all the caps of that brand.
Also, one last question... What are you powering in that server (processor, number of hard drives, etc.)?

[ratdude747]

Re: psu question

yup, i see fuhjyyu in there. i see the logo, but just barely. not to pad for a distant pic

[yonu]

Re: psu question

here are some more if you think closer will help let me know and i will get my macro lens out

[ratdude747]

Re: psu question

yeah, the primary caps are fujhyyu so the rest probably are. recap that if you plan to use it.

[Krankshaft]

Re: psu question

Does that thing have a huge pot for fan speed adjustment?

A small screwdriver actuated pot would have sufficed .

If they're Fukyuus I'd love to ESR probe them they'd probably be off the charts 75 ohms and over anyone ?

[yonu]

Re: psu question

do you think that will solve the random turning off?

[Krankshaft]

Re: psu question

Fujiuyuus are known junk PERIOD. Replace on sight no matter what electronics you find them in.

It's not if they'll fail in a PSU it's when.

I had an Antec with Fujiyuus that powered up and turned off in an infinite loop every 4 seconds or so when connected to a computer.

So yes bad caps can wreak havoc and cause undesired operation in any circuit.

[yonu]

Re: psu question

yes the huge POT is the fan speed it came like that

[yonu]

Re: psu question

well i guess I will go cap shopping

[yonu]

Re: psu question

quick question I know you are sup;pose to replace all the caps at once but will only replacing the 2 200v caps do anygood?

[yonu]

Re: psu question

well I think I found the problem caps int eh circled area is a cluster of 5 caps that I didn't notice til I got it out of the housing and could work the cables so I guess I will start there and work my way around

[kc8adu]

Re: psu question

cant see much in that pic but i noticed a fuhkyyu in the middle of the board.
panasonic fm is a good replacement.
replace any on the secondary side that bear the "F" word.

[yonu]

Re: psu question

i plan to well since I have to go tomorrow and pick up caps in the uf rattings i decided to see if the problem would goaway I had 2 OST caps in the right ratings i had pulled from a board a while back so i replaced the 2 blowed caps it has been setting running with a junk board and 2 old hdds on it for the last hours so i guess the 2 caps were the issue so now I just have to go get the good ones.

Thanks again guys,
yonu

[momaka]

Re: psu question

Nice work. New caps should this PSU a lot better. Just make sure to get compatible replacements such as FC an FM (Panasonic), PW and HE (Nichicon), or KY and KZE (United Chemicon).
Replace all of the secondary-side caps (the ones in and near the red circle in your picture above) and the 5vsb filtering caps (blue one in 3rd picture down from your first set of pictures). As for the two big 200v caps on the primary side - they usually don't go bad so you don't need to replace them. But it should only be about $7 more, so if you feel like it why not.
By the way, look for caps with the following ratings:
22uF 25v, 22uF 50v, 47uF 25v, 47uF 50v.
Those are sometimes critical (depending on the PSU design). If you see any Fuhjyyu caps with those ratings, make sure to replace them.