Fortron FSP-ATX-400PNF

[weirdlookinguy]

Re: Fortron FSP-ATX-400PNF

fsp is a decent psu oem, but the love crap caps!

Actually, they've really gone downhill and put out a lot of junk in the past few years.

[c_hegge]

Re: Fortron FSP-ATX-400PNF

Personally, I'd be replacing all of the secondary caps if I had one of these. Jamicon are pure junk, right down there with Fuhjyyu and Sacon. El-cheapo Teapo are marginally better, but not much. I see lost of PSUs with failed teapos. I wouldn't be too worried about the primaries, though, as they rarely fail in any PSUs.

[momaka]

Re: Fortron FSP-ATX-400PNF

I have 2 of these PSU laying around with bad caps. One of the 2 CAPs in the middle (Teapo 1000uF 10V) are dead on both.

I wonder if it originates from the capacitor quality or maybe the motherboard what it worked with killed it.. (I found these)

I would change them, but I have only 1 such capacitor in my inventory but that has greated diameter, or I have some (a lot) nichicon 1000uF 6.3V caps.. oh and a Jee 1000uF 16V.
Jee is low quality as I read, but maybe it is oversized enough not to die?

Also would it be enough to change 1 cap on both, or both caps since they are identical, and I guess the other can fail as well?

JEE is really bad, don't bother using it. The Nichicons are much better and should work fine (if they are the right series, of course, such as PW, PM, and HE), even though they are rated for a lower voltage. The original caps are rated for 10v, which means they cannot be placed on the 12v rail, only on the 3.3v, 5v rail, or 5vsb.
Thus 6.3v and 10v caps are *generally* interchangeable in PSUs.

[mockingbird]

Re: Fortron FSP-ATX-400PNF

The FSP units with Teapo caps fail often. I've got several 300W model "PN" or "PN/B" here. The "THN" models with the OST caps last longer.

[PCBONEZ]

Re: Fortron FSP-ATX-400PNF

Exact opposite experience with a batch of six FSP460-60PFN I did a while ago.
These had 3 cap PI filters on all three rails.
For the lot: 18 of 18 OST blown and only 4 of 26 Teapo blown. All the OST were on +12v. All the bad Teapo were in the same PSU. All the caps were 12.5mm.
... Also had 5 of 5 Fuhjyyu blown. - Imagine that!!
One had a light blue Teapo instead of a Fuhjyyu in that spot. That was one of the ones without blown Teapos.
.

[370forlife]

Re: Fortron FSP-ATX-400PNF

Usually teapo will show it when they fail, OST hardly ever does.

[dood]

Re: Fortron FSP-ATX-400PNF

Usually teapo will show it when they fail, OST hardly ever does.

I've found the exact opposite to be true.

[Rulycat]

Re: Fortron FSP-ATX-400PNF

Considering the mixed experiences here, we should maybe just settle on them all being rubbish and move on!

Maybe they're not so bad if the heat is kept down?

[c_hegge]

Re: Fortron FSP-ATX-400PNF

Usually teapo will show it when they fail, OST hardly ever does.

I find that both brands often fail without showing it.

[PCBONEZ]

Re: Fortron FSP-ATX-400PNF

My experience is more in-line with what 370forlife said on mobos.
I would adjust it to:
Usually teapo will show it when they fail, OST often don't. [On mobos.]
-
For me, in PSU's they both usually show it and they both sometimes don't.

Thing is, with PSUs I tend to see the same model[s] over and over.
I usually get 5 to 10 at a time and stick to models I know.
When I see the same PSU over and over the odds are I'm going to see the same cap problems over and over.
So: many of you see a wider -variety- of PSU cap issues than I do.
.

[PCBONEZ]

Re: Fortron FSP-ATX-400PNF

Considering the mixed experiences here, we should maybe just settle on them all being rubbish and move on!

OST's get yanked regardless of condition.
It might say OST on it but my eyes see Fuhjyyu anyway.
I'll leave Teapo alone if I haven't seen a bad one in whatever model PSU yet and there is no other reason to pull it apart.

Maybe they're not so bad if the heat is kept down?

Yup, good cooling helps.

[mzperx]

Re: Fortron FSP-ATX-400PNF

Returning to the repair part: found 2 United branded 1000uF 10V capacitors which should be the exact same size I need. Are they considered good?

[Th3_uN1Qu3]

Re: Fortron FSP-ATX-400PNF

If you're talking about United Chemi-Con, then yes they're good. Also i can confirm what PCBONEZ said about Teapo. I've also had good luck with Jamicon coz that's pretty much all they sell here, but only with general purpose ones in general purpose applications, never used (or seen for that matter) them in a SMPS yet.

Never seen bad primary caps? I did, in a blown Antec Smartpower. Not bloated but one has about 1.5 ohm ESR, the other 0.5. That is while ALL other primaries i have measure below 0.15. They were, guess what... Fuhjyyu of course! Funny thing is that all the Fuhjyyu and Jun Fu caps in the secondary of that PSU tested perfect.

[mzperx]

Re: Fortron FSP-ATX-400PNF

I'm thinking if I can fix the problem, I might buy some caps, and redo the whole power supply, but first I want to fix the visible problem to see if it works at all or some other parts got blown too as a consequence.

[370forlife]

Re: Fortron FSP-ATX-400PNF

If they are these type of united, then no they are not good

http://capacitor.web.fc2.com/u.html#united

These ones are:

http://capacitor.web.fc2.com/u.html#unitedchemicon

[mzperx]

Re: Fortron FSP-ATX-400PNF

It seems that the solution will be really to try with whatever I got, and thenif it works change the whole set. It should still be cheaper than buying a brand new PSU, and if I but in brand caps it should stay function for years.

[Darko442]

Re: Fortron FSP-ATX-400PNF

hello
I have problem with Fortron FSP-ATX-400PNF, blow out electrolitic capacitor and burnout resistor in HV part of PSU,and please help,I need info for this capacitor, how is rated Capacity/Voltage.

[c_hegge]

Re: Fortron FSP-ATX-400PNF

I don't know what value the resistor is, but the exploded capacitor is probably the same as the other small one just behind it.

[momaka]

Re: Fortron FSP-ATX-400PNF

If no one gets to your question in a day or two, post a picture of the underside of the PSU so that we can figure out what circuit that cap and resistor are part of.

[Darko442]

Re: Fortron FSP-ATX-400PNF

thanks for speed help.Switching transistor is NPN "3DD209L" from China on this link is datasheet"http://www.alldatasheet.com/view.jsp?Searchword=D209L".
Resistor and electrolitic capacitor is in base circuit,fuse is blow,main switch transistors is blow,rectifier is ok,main electrolitic cap(1 and 2) is ok.and this is all for now...
pictures is attached
Darko442