Do main caps go on a GX280 SFF PS

[JOHNBOY]

I changed 90% of the caps and it still just makes a growling sound but doesn't start. The main caps look really cheap, I'm wondering if anyone knows if they are a known problem on these.

This is the one with the thinner fan, I always have good success with the other variation which is a lite on, but these ones always just growl for a second after a recap.

[seanc]

Re: Do main caps go on a GX280 SFF PS

'Growling'.

Do we have SFF or USFF with external power brick here?

[JOHNBOY]

Re: Do main caps go on a GX280 SFF PS

There is no USFF in a GX280. Not in north america anyway. The separate power brick is a totally different model. I believe gx620 or something.

The power supply just makes a buzz / growl for one second when pressing the power button. I have 5vsb but that is it.

[seanc]

Re: Do main caps go on a GX280 SFF PS

Sorry, I read SX280!

Have you checked the mains capacitor? Next I would look at transformers.

[JOHNBOY]

Re: Do main caps go on a GX280 SFF PS

I pulled the mains and both were reading 289 and 290uf on a basic capacitor tester. It should be 330uf so it makes me think they're good.

[ratdude747]

Re: Do main caps go on a GX280 SFF PS

hmm... do you have any primary caps floating around that you could sub in? what brand are the existing ones anyway?

[JOHNBOY]

Re: Do main caps go on a GX280 SFF PS

No I don't have spares for those big ones. It is a no name brand. black sleeve and the letter M inside a TV box (M) CE . I bought this brand before in a smaller size and you guys slammed me for it.

I just changed the last 1000uf 10v and still the same 1 second of buzz when I plug it in.

[Scenic]

Re: Do main caps go on a GX280 SFF PS

M inside a box [M] is Panasonic/Matsushita

http://rocky.digikey.com/weblib/Pana...ES%2025,25.jpg

[JOHNBOY]

Re: Do main caps go on a GX280 SFF PS

Would it be a disaster if I put in a 470uf for a couple of seconds to see if it turns on.

[yyonline]

Re: Do main caps go on a GX280 SFF PS

No I don't have spares for those big ones. It is a no name brand. black sleeve and the letter M inside a TV box (M) CE . I bought this brand before in a smaller size and you guys slammed me for it.

I doubt anybody here would fault you for buying Panasonic capacitors, which are a very reliable brand. This assumes, of course, that they were real Panasonic (not fakes), and that they were the correct type of capacitor for the application. It's possible to have a perfectly reliable capacitor that is just ill-suited for a particular application.

That said, if the originals are Panasonic, they are unlikely to fail. That said, SFF computers do like to cook even the reliable brands.

[retiredcaps]

Re: Do main caps go on a GX280 SFF PS

It is a no name brand. black sleeve and the letter M inside a TV box (M) CE . I bought this brand before in a smaller size and you guys slammed me for it.

Panasonic makes a variety of series. Each series has a specific use. Panasonic FM, FR, and FC are low ESR caps. [M] CE is a general purpose cap (i.e. not low ESR).

The same goes for other manufacturers. Rubycon makes low ESR and general purpose caps.

[yyonline]

Re: Do main caps go on a GX280 SFF PS

M is a general purpose cap (i.e. not low ESR).

As to not confuse the new people... It sounds like the mains cap in question here is Panasonic CE series.

[M] in a rounded box is Panasonic's logo. This appears on all Panasonic capacitors, regardless of the series.

M not in a box on a Panasonic capacitor would be the series.

[JOHNBOY]

Re: Do main caps go on a GX280 SFF PS

I switched over a set of good 470uf caps and got the same buzzing and growling for one second. I don't think its a cap issue, these wan wien power supplies suck. I tried to jump start it a few times and eventually the 5VSB went away, now I think I have a blown fuse.