My first ever PSU repair

[Daryn]

Re: My first ever PSU repair

Well done on the repair, nothing better than repairing something yourself. This forum has more to it than I first thought, i thought it was all about TV's looking forward to reading some more.

[Rulycat]

Re: My first ever PSU repair

The PSU's fan gave out today so I replaced it. Upon opening the PSU I see a space for capacitor "C36":

https://www.badcaps.net/forum/attach...1&d=1329096246

I'm wondering what I can put here. Should I measure the voltage with a multimeter?

[c_hegge]

Re: My first ever PSU repair

It's probably on the 3.3v rail. I'd say add it for sure (probably use a 2200uF or even 3300uF). If in doubt, use a 16v cap. I'd also replace that Jumper wire (L1 I think it is) with a coil, since it wil significantly inprove the ripple suppression.

I just noticed the TB markings on the second line on the transformer. Definately a Sun Pro. They usually use Tebao Metallic plastics fans, which always fail after a few years.

[Rulycat]

Re: My first ever PSU repair

Is it worthwhile me using a multimeter to check the voltage across it?

[c_hegge]

Re: My first ever PSU repair

Either that or just trace out the circuit and see which group of wires it goes to.

[Rulycat]

Re: My first ever PSU repair

Also when you say to replace the jumper with a coil, do you mean the type inbetween C36 and the other caps?

[momaka]

Re: My first ever PSU repair

Also when you say to replace the jumper with a coil, do you mean the type inbetween C36 and the other caps?

Using this picture as a reference:
https://www.badcaps.net/forum/attach...4&d=1329096233
the missing coil is right under the spot for capacitor C36.

It's a Sun Pro indeed. Also, check the under side of the PCB for any loose solder balls or long leads that can short out something in the future.

[ratdude747]

Re: My first ever PSU repair

Well that's very, very odd. Why someone would fake a teapo I do not understand. Maybe they will be useful in extremely light load applications like clocks.

because for PSUs, teapos are kinda ok... teapo is better than a lot of the cheap PSU caps.

[Rulycat]

Re: My first ever PSU repair

Using this picture as a reference:
https://www.badcaps.net/forum/attach...4&d=1329096233
the missing coil is right under the spot for capacitor C36.

It's a Sun Pro indeed. Also, check the under side of the PCB for any loose solder balls or long leads that can short out something in the future.

I mean, what type of coil do I use? I don't normally do anything more than a recap, and I only started with this PSU, so I'm not sure what this coil looks like. Is it the same type as the other one next to C36 that is already there?

[c_hegge]

Re: My first ever PSU repair

Yes. It is indeed the same type. You could scavenge one from another dead PSU.

[Rulycat]

Re: My first ever PSU repair

My dad's bringing his box of caps back from work sometime this week or next week, and a dead PSU if he has one lying around. Then I'll post pics of the results, and possible explosions. I'm not too worried to be honest as this PSU is more of a testbed for fixes and ideas so I don't screw up one actually worth something.