swollen or not? can you tell?

[goodpsusearch]

Hi! New to forum..

I have a Macron Power psu MPT-301 and it seems to me that the primary caps are swollen. But before trying to recap them (I have no experience in this) I need to be sure that they need to be replaced.

[Krankshaft]

Re: swollen or not? can you tell?

Looks like it's bulging no way I'd leave it in there in any case.

I had a UCC counterfeit cap on a variable power supply that looked the same way when I removed the plastic cap it had some brown goop under it. The can didn't look bulged but I gutted the counterfeit anyways.

[POM_MJ]

Re: swollen or not? can you tell?

It's look similar to my Enlight VP-300 in this post ==> https://www.badcaps.net/forum/showpo...3&postcount=95

same caps brand used, on my vp-300 secondary side caps had leakaged then caused very damage to other components.
I'd recommended to replace caps on both primary and secondary side.

[370forlife]

Re: swollen or not? can you tell?

I like the Y cap wedged under that X cap. Really good manufacturing processes there.

[ratdude747]

Re: swollen or not? can you tell?

I like the Y cap wedged under that X cap. Really good manufacturing processes there.

this psu is simply EPIC FAIL. dang, it takes effort to blow primaries, even bad ones.

[Krankshaft]

Re: swollen or not? can you tell?

It's got a primary side choke though I'll give them credit for that.

[berniedd]

Re: swollen or not? can you tell?

I've had a PSU line cap that looked like that. I pried off the plastic round bulging top, and saw the only thing bulging was the plastic. The bare aluminum top of the capacitor was oK. Needless to say, I left it there, didn't replace it. I have yet to see a Line capacitor go bad, even after 17 years of being in the computer hobby.

[goodpsusearch]

Re: swollen or not? can you tell?

Thanx for the replies

It seems really difficult for me to change all the psu caps... I don't trust my hands :P

If I knew anyone in my region who could do this I would have him recap them.

The psu caps are cs (as the bulging primary caps) and 3xjp and 2 jee caps. None is bulging or leaking except primaries. The psu works fine in P3 system but can't boot a pentium 4 1,5GHZ, intel 845 motherboard with sdram support.
Voltages are close to nominal values, only 12v is a bit low (11,7-11,8v).

I was impressed by the high capacity of the primaries (680uf), all other psus I ve seen had 470uf or even 330uf.

One more question please.. the primary caps specs are 680uF 200wv vent85c. What does Wv mean? Is it different from 200V? Sorry, if it is a stupid question...

[goodpsusearch]

Re: swollen or not? can you tell?

*and 3xjp and 2 jee caps ---> and 3xJPce 1uF 50v and 2xJPce 220uF 16v caps, sorry...

[370forlife]

Re: swollen or not? can you tell?

Thanx for the replies

It seems really difficult for me to change all the psu caps... I don't trust my hands :P

If I knew anyone in my region who could do this I would have him recap them.

The psu caps are cs (as the bulging primary caps) and 3xjp and 2 jee caps. None is bulging or leaking except primaries. The psu works fine in P3 system but can't boot a pentium 4 1,5GHZ, intel 845 motherboard with sdram support.
Voltages are close to nominal values, only 12v is a bit low (11,7-11,8v).

I was impressed by the high capacity of the primaries (680uf), all other psus I ve seen had 470uf or even 330uf.

One more question please.. the primary caps specs are 680uF 200wv vent85c. What does Wv mean? Is it different from 200V? Sorry, if it is a stupid question...

My nichicon 200v, 680uf caps say that too. It's basically just volts.

If you want someone to recap it, location would help.

[goodpsusearch]

Re: swollen or not? can you tell?

My nichicon 200v, 680uf caps say that too. It's basically just volts.

If you want someone to recap it, location would help.

Greece

[Toasty]

Re: swollen or not? can you tell?

WV = Working Volts

>>If I knew anyone in my region who could do this I would have him recap them.<<
You don't show your region in your profile... Perhaps if you did....?

[370forlife]

Re: swollen or not? can you tell?

Greece

Lol. Maybe willawake, I believe he is in greece. Still, soldering on a single layer cheap power supply like this is a snap. Heat one lead up, pull it out. Heat the other up, pull it out. Cap plops right out. New cap-check polarity, put in holes. I usually just heat the holes real quick on the other side to just slide it in over the old solder, holds it in place until I get more solder into it.

[c_hegge]

Re: swollen or not? can you tell?

see if you can push the plastic down pn top. if you can, the caps are probably OK, if you can't, they're toast. it's common for the plastic disc to dome but the top of the cap to be flat.

[goodpsusearch]

Re: swollen or not? can you tell?

I did push it with fingers,nails etc but it didn't move at all. remained bulged... So I guess I have no option but try and change them. Wish me good luck!