Tmp-ans Lc B350atx

[willawake]

Canicon 1000uf10V looks bulging. I will replace. The PSU is still performing fine though.

[kc8adu]

Re: Tmp-ans Lc B350atx

those are junk when new.
they tend to trash mobo's when they die .
here is the cure.
like a bug you just have to step on em.

[Chris1992]

Re: Tmp-ans Lc B350atx

Will, I agree with kc8 and congrats on getting quoted in the cNet article that pauloncall posted about.

[willawake]

Re: Tmp-ans Lc B350atx

those are junk when new.
they tend to trash mobo's when they die

came with a cheap case. i guess i wont be repairing it then. many thanks for the advice.
user can have my old veden 300w which has been running 24/7 for years. i wish we had more $$$ for the office.

[willawake]

Re: Tmp-ans Lc B350atx

congrats on getting quoted in the cNet article that pauloncall posted about

i didnt even say that. but yes i dont recommend for beginners to try to recap an in-warranty board before the caps start failing. especially something proprietary like a G4. leave that to the pros. out of warranty who cares if the job is messed up, the board was useless anyway.

anyway the more press on the badcap issue the better until someone starts doing something about it.

[Rainbow]

Re: Tmp-ans Lc B350atx

I save dead crap PSUs - as component source for other PSU repairs
However, if it works, replace the bad cap (and better also other Canicons too, if any). I see an optocoupler there, so at least it should not burn everything while turned off.

[japlytic]

Re: Tmp-ans Lc B350atx

The bulging capacitor is used in the +5V standby rail (If this rail fails, you can't start your computer! )

Are there any Gincon capacitors in it? (You should find two of them)

The chip is marked "2003", as shown in the pictures - most likely to be a poor quality one. Some quality power supplies from big manufacturers have their own chips in them.

My LC-B400ATX supply was almost identical to these pictures. I'm glad I scrapped it before it damaged my system!

[PeteS in CA]

Re: Tmp-ans Lc B350atx

That is a 350W P/S?! I'd be afraid to use it for more than 250W. Those heatsinks and that power transformer are going to get really hot at 350W. I'd love to know what the ratings are of the +5V and +3.3V O/P rectifers. If the part numbers look something like MBR4060DT, the "40" means its rated for 40A, and the "60" means the peak inverse voltage is 60V.

[willawake]

Re: Tmp-ans Lc B350atx

found another one in the "use if desperate" box.
different brand, same psu board Y-B200ATX Ver 2.9

[japlytic]

Re: Tmp-ans Lc B350atx

Very similar circuits of this unit can be found on http://narod.yandex.ru/100.xhtml?ele...Y-B200-ATX.zip and http://www.eserviceinfo.com/download.../L&C_400W.html

I can also see electrolytics with an unknown manufacturer's logo in the attached picture.

As with my unit, the electrolytics (as well as the output rectifiers and the heatsink) were a bit under-rated.

[Newbie2]

Re: Tmp-ans Lc B350atx

Commonly every PSU model number starting in "LC" means that it's an crappy L&C power supply. Those caps with a logo of a planet in L&C power supplies are generic caps.

[na064]

Re: Tmp-ans Lc B350atx

what is replace for FET Q3 SSS2N60A ?

[PeteS in CA]

Re: Tmp-ans Lc B350atx

na064,

That looks to be an very obsolete Samsung part - TO-220, 600V, 2A, 5 Ohm, N-channel. SAmsung MOSFETs were acquired some time ago by Fairchild. This looks like a decent replacement. It's same package and voltage, 3A, 3.4 Ohm; it's probably faster, with a lower gate charge (easier to drive) than the original.