bestec atx300-12e teapo sek?

[kc8adu]

iirc sek are general purpose.
this came out of a gateway athlon 64x2 box.
both 1000@16 on +12 are ready to hatch!
the info i found show 1000@16 sek good for approx 700 ma ripple.
fc are nearly twice that.
sure way to make it blow up in a year?

[acstech]

Re: bestec atx300-12e teapo sek?

Yep general purpose. I found those on an FSP ATX-400PA. I found a 2200uF unknown volts (covered by glue), a couple of as of yet unknown small caps, and a 3300uF 10v, all Teapo SEK. The rest of the caps are TK or Capxon. This PSU has not been used often, so I cannot comment on how long they'll last.

I do have one of these units out in service, so it'll be yearly inspection on that thing for sure.

[kc8adu]

Re: bestec atx300-12e teapo sek?

pics

[i4004]

Re: bestec atx300-12e teapo sek?

hard to see from those pics.
if their esr is anywhere near ok, i would leave them.
(how much ripple on the scope? esp. in comparison to good psu...)

also, output caps won't blow out psu or the mobo, because eventually overvoltage protection will kick in.
even if it has so much ripple(i rather doubt this..) that it's frying non-quality caps on the mobo, it still doesn't qualify as catastrophic failure if you ask me.
quality caps on mobo will probably swallow that without issues(see last paragraph).

but in such situation i would suggest to customer to think about buying new psu soon.
if it's on 24/7, then yeah, you should do something now.

it's not as bad as this(see attachment). i've left it like that. what saves the day are chemicons on intel mobo that crap was powering.
it's a pretty old system (2001) anyway...
(offcourse i've checked the critical caps(and rather critical for this design) on 5vstby suppply...they're fine)
and it's probably like that for past few years...

[kc8adu]

Re: bestec atx300-12e teapo sek?

the +12 caps are open.
2 ohms esr is considered open here.
the box bootloops.

[i4004]

Re: bestec atx300-12e teapo sek?

so put good caps or put new psu.

again, it won't blow up anything if it's just those caps.
if they were esr 100ohm, it would bring '12V up and at certain point overvoltage of pwm-ic kicks in, shuts it down to prevent damage...

my bet is the following; on psus that blow itself or mobo, you'll never find just output caps as problematic areas. something else caused disaster, not _these_ caps.

one can ecounter many bad psus with bad output caps that did no damage.
those that did damage had bad caps on other places.

oh..i got it now; you're asking if you can replace teapos with pana that has 2x ripple?
why do you think it will cause problems?
i would say it'll just filter it better....the thing they're there for.

if you're scared, can you put 1 pana of 2000uF instead of those 2 teapos?

[acstech]

Re: bestec atx300-12e teapo sek?

Maybe Panasonic FC, or *gasp* NHG?

Could they have designed the thing around GP caps? If so, wouldn't caps with too low ESR potentially cause a bit more ripple?

If it was me, following my own replacement rule of replace with the appropriate series, I would use Panasonic NHG's to replace the Teapo SEK caps.