ocz 420 u12 swollen caps

[predator0357]

Hi,
I just opened my PSU and found 4 caps swallon and one of them even with ”the juice” on top, but why i opened it cuz every time shouted of the computer n tried to start it, it comes on but not fully on u hear the fans ane led but no display no keyboard or mouse but if i repeate the shoutdown and power on it finaly comes on after like 2 to 5+-.
The weird thing is the comp work pretty fine.
My Q is i want to recap it but i dont know what cap should i put?
The caps inside is 2* 2200[uf] 10[v] and 2*4700[uf] 10[v] low esr bouth.
The caps that i want to put is:
Panasonic FC & Rubycon ZLH
But i dont the thing with the ”ripple current”?

Thx very mush 4 ur help,
Itay Steiner

[Pentium4]

Re: ocz 420 u12 swollen caps

Don't use that PSU at all until the caps are replaced, it may seem to work fine but that ripple is highly stressing your motherboard caps, and hard drive especially. Even one bad cap can cause crazy oscillation. Panasonic FC and Rubycon ZLH are good replacements. Ripple current and ESR are the most important factors, size isn't much of an issue if the caps fit, but it's preferable to not extend the caps off the board as this increases the ESR.

What is the full model number of the PSU? I know OCZ likes to use FSP, which sometimes use small 8mm caps. Are the failed caps CapXon?

[predator0357]

Re: ocz 420 u12 swollen caps

Don't use that PSU at all until the caps are replaced, it may seem to work fine but that ripple is highly stressing your motherboard caps, and hard drive especially. Even one bad cap can cause crazy oscillation. Panasonic FC and Rubycon ZLH are good replacements. Ripple current and ESR are the most important factors, size isn't much of an issue if the caps fit, but it's preferable to not extend the caps off the board as this increases the ESR.

What is the full model number of the PSU? I know OCZ likes to use FSP, which sometimes use small 8mm caps. Are the failed caps CapXon?

I think its capxon, this is the only mistake i made that i didnt write the comany.
Why u ask if its capxcon?

[predator0357]

Re: ocz 420 u12 swollen caps

And this is the model num on the PSU

[Pentium4]

Re: ocz 420 u12 swollen caps

I just wanted to know the company and series so I could compare the specs of the capacitors

[predator0357]

Re: ocz 420 u12 swollen caps

Here a pics of the PSU of mine:-)
Ill b happy if some1 please can recommend on good but not the best caps 4 this PSU:-)
I need:
2* - 2200[uf] 10[v] LOW ESR
2* - 4700[uf] 10[v] LOW ESR

[stj]

Re: ocz 420 u12 swollen caps

you need 7 caps not 4.
you need to change the ones under the edge of the heatsink too.

the ones with the 3way vent are mad by fuckyu - they are probably the worst caps ever made!

[predator0357]

Re: ocz 420 u12 swollen caps

you need 7 caps not 4.
you need to change the ones under the edge of the heatsink too.

the ones with the 3way vent are mad by fuckyu - they are probably the worst caps ever made!

Where? Where are the 3 more caps?
The ones with triangle vents?

[predator0357]

Re: ocz 420 u12 swollen caps

you need 7 caps not 4.
you need to change the ones under the edge of the heatsink too.

the ones with the 3way vent are mad by fuckyu - they are probably the worst caps ever made!

And how do u know????

[Pentium4]

Re: ocz 420 u12 swollen caps

This is an old Topower design, but very solid. It's going to be extremely difficult to replace the caps on the secondary without removing the heatsink. There are caps back there that you can't see until you remove the heatsink. I've worked on a few of these, it's a long project but these are very well performing PSU's, and run very silent. Replace ALL of the little caps too, in the few I've worked on, some were completely failed, as in 30Ω+ ESR on the <10uF caps. Also, check the oil in the fan bearings, they're usually dry. Depending on which revision you got, it may have weak 12V rectifiers. I've seen one with two 10A ultra fast in parallel, one with 16A ultra fast in parallel, and one with 20A ultra fast in parallel

[stj]

Re: ocz 420 u12 swollen caps

the ones with 3way star vent have a logo visible on them.
and the ones under the edge of the sink will take the most heat - so be more effected by age.


when you recap a psu - it's best to do all at the same time.

[predator0357]

Re: ocz 420 u12 swollen caps

This is an old Topower design, but very solid. It's going to be extremely difficult to replace the caps on the secondary without removing the heatsink. There are caps back there that you can't see until you remove the heatsink. I've worked on a few of these, it's a long project but these are very well performing PSU's, and run very silent. Replace ALL of the little caps too, in the few I've worked on, some were completely failed, as in 30Ω+ ESR on the <10uF caps. Also, check the oil in the fan bearings, they're usually dry. Depending on which revision you got, it may have weak 12V rectifiers. I've seen one with two 10A ultra fast in parallel, one with 16A ultra fast in parallel, and one with 20A ultra fast in parallel

First: what kind of oil should i use? Something like WD-40?
Why to recap the small ones? And should i check them first with esr meter?
And should i recap all of them?

[Pentium4]

Re: ocz 420 u12 swollen caps

First: what kind of oil should i use? Something like WD-40?
Why to recap the small ones? And should i check them first with esr meter?
And should i recap all of them?

No, don't use WD40. I use Tri-Flow and it works pretty well, see what you've got lying around.

I recommend replacing the little caps because they often fail in these PSU's because they're low quality, and the fan spins slow so they get hot. And, in yours they're about a decade old. At least replace the ones next to the switching transistors. You can leave the little ones on the daughterboard.

[predator0357]

Re: ocz 420 u12 swollen caps

No, don't use WD40. I use Tri-Flow and it works pretty well, see what you've got lying around.

I recommend replacing the little caps because they often fail in these PSU's because they're low quality, and the fan spins slow so they get hot. And, in yours they're about a decade old. At least replace the ones next to the switching transistors. You can leave the little ones on the daughterboard.

One more Q, tri flow whats in it? And there is other brands?
And like u said its a hard project and if i am gonna open and spend time on it so i will recap all i can:-)
So like i said "may all the caps be with me" ヅ

[predator0357]

Re: ocz 420 u12 swollen caps

In the little ones what brand/series should i put there?

[predator0357]

Re: ocz 420 u12 swollen caps

Hey i have anothe psu and he have two caps dead and one of the 10v and i know u can put little bit more V like 16v, am i right?

[Pentium4]

Re: ocz 420 u12 swollen caps

One more Q, tri flow whats in it? And there is other brands?
And like u said its a hard project and if i am gonna open and spend time on it so i will recap all i can:-)
So like i said "may all the caps be with me" ヅ

Not sure, I just know it works well

In the little ones what brand/series should i put there?

They're not too picky usually, so anything that's 105C rated should work, I use Panasonic FC, nichicon PW, Chemi-Con KY, in higher quantities they become pretty cheap.

Hey i have anothe psu and he have two caps dead and one of the 10v and i know u can put little bit more V like 16v, am i right?

You should make a separate thread for that, but yes you can go up in voltage and that will stress them less, giving them a longer life

[predator0357]

Re: ocz 420 u12 swollen caps

Not sure, I just know it works well

They're not too picky usually, so anything that's 105C rated should work, I use Panasonic FC, nichicon PW, Chemi-Con KY, in higher quantities they become pretty cheap.


You should make a separate thread for that, but yes you can go up in voltage and that will stress them less, giving them a longer life

I have anothe 120mm fan that work, so should i change for that or just oil the old fan?

[predator0357]

Re: ocz 420 u12 swollen caps

Not sure, I just know it works well

They're not too picky usually, so anything that's 105C rated should work, I use Panasonic FC, nichicon PW, Chemi-Con KY, in higher quantities they become pretty cheap.


You should make a separate thread for that, but yes you can go up in voltage and that will stress them less, giving them a longer life

And i wish i had A good store to buy from cuz every store the shipping costs are crazy so if u have some goox seller on ebay or web that is cheap+shiping ill B most happy with hiz advice:-)
Tnx a bunch for the help and the time u spened on me:-)

[c_hegge]

Re: ocz 420 u12 swollen caps

^
Try this fella - http://stores.ebay.com.au/PC-MotherB...pacitors-Store

His caps are all NOS, but they should work OK. Topcat here doesn't have much in the way of PSU caps.

I see two 470uF 16V caps (the Fuhjyyus). They can get replaced by these (http://www.ebay.com.au/itm/6-Rubycon...item43c09e20c5)

2200uF 10V caps can get replaced by these (http://www.ebay.com.au/itm/8-pcs-Rub...item43c0209c72)

4700uF 10V caps can be replaced by these (http://www.ebay.com.au/itm/4-NCC-KZE...item43a7c69012). And yes, using 6.3V caps in place of 10V caps is fine on the output