the gutless, bloated, and fried power supply hall of shame

[tom66]

Re: the gutless, bloated, and fried power supply hall of shame

12.61V is not going to kill a motherboard.

Google actually runs commodity motherboards on 13.8V, because they have a lead-acid battery in parallel, acting as a backup power supply.

I think most motherboards would survive 14~15V with no lasting damage. Hard drives give problems though, I've found they spin too fast, leading to them restarting frequently. Haven't yet tried to boot from one, though...

[Th3_uN1Qu3]

Re: the gutless, bloated, and fried power supply hall of shame

I think most motherboards would survive 14~15V with no lasting damage.

That is most likely correct. OVP on most ATX power supply controllers is typically set to 14.4V IIRC.

[Pentium4]

Re: the gutless, bloated, and fried power supply hall of shame

I know it's not dangerously high, I just don't like to see it that high. And as it warmed up even more, it's down and staying at 12.55V. I won't worry about it too much. I guess what would be more concern is just 3300uF for 12V filtering with no coil

[Pentium4]

Re: the gutless, bloated, and fried power supply hall of shame

Had this PSU in a surveillance system powering a Pentium D setup. The fan completely seized up and who knows how long it was running like that! I think the only thing that saved it was the fact that it was in a very cold server room. The heat did kill most of the OST caps without them bulging. Check out the ESR on the one in the picture!

Replaced all the caps and the fan, it is much happier now and it looks much better

[c_hegge]

Re: the gutless, bloated, and fried power supply hall of shame

Interesting. Only the 5VSB caps actually bulged. In Win Power Men usually are quite well built, but I do wish that they would use better fans. Most of the newer ones use ADDA fans.

[Pentium4]

Re: the gutless, bloated, and fried power supply hall of shame

I found that strange too since while the fan WAS working, they were the closest. The fan had hardly no oil in the bearing at all, but that could have dried out from the PSU getting so hot. Poweman does have a lot of good power supplies. A shame they use a lot of ADDA...the one I used in this one is a Protechnic Electric.

I like how in that pic showing the 5VSB caps bulging, next to the orange wires they forgot the period so it looks like "+33V"

[c_hegge]

Re: the gutless, bloated, and fried power supply hall of shame

^
Bestec should do that on the 5.0VSB rails on the 250-12E

[Agent24]

Re: the gutless, bloated, and fried power supply hall of shame

^
Bestec should do that on the 5.0VSB rails on the 250-12E

Nice one.

By the way, does the 250-12Z have the same problem?

[c_hegge]

Re: the gutless, bloated, and fried power supply hall of shame

No, it's only the 12E

[Pentium4]

Re: the gutless, bloated, and fried power supply hall of shame

I'm going to steal Behemot's line and say "prepare your vomit pale"

I can't believe this was used in a computer for years. Those poor components. 220uF input caps, four 2A diodes, D4242 switchers, 10A for 3.3V, 16A for 5V, and two 3A diodes for 12V One cap for 12V filtering. "Pentium 4 ready" ?!?! those diodes would barely be able to handle JUST a P4 let alone everything else that uses 12V!

Fan is made by Foxconn, sorry for the blurry pics they didn't seem blurry till I uploaded them

Maybe it's called "Everest" because it would need to run at the top of Mt. Everest to do over 150W without overheating?
Deer

[Behemot]

Re: the gutless, bloated, and fried power supply hall of shame

"Pentium 4 ready" ?!?!

It was waiting for you the whole time

[Pentium4]

Re: the gutless, bloated, and fried power supply hall of shame

[ben7]

Re: the gutless, bloated, and fried power supply hall of shame

Wow, look at how smokin hot that filter choke got!

I guess those caps survived because they weren't mounted next to any hot components xD

What is wrong with the psu? Does the 5vstby read 5v, or does it read 20v?

[kaboom]

Re: the gutless, bloated, and fried power supply hall of shame

Looks just like the free-with-tigerdirect-case power supplies.

Because it is.

Wow, look at how smokin hot that filter choke got!

I guess those caps survived because they weren't mounted next to any hot components xD

Looks like undersized traces overheated, discoloring the board... The winding varnish is not discolored.

What is wrong with the psu?

What isn't?

No X-rated line-to-gnd caps
"Invisible" RFI/EMI filter- that's ok since the "FCC" logo is fake
Undersized wiring, complemented by overfusing

But at least the standby transistor is heatsinked!

Does the 5vstby read 5v, or does it read 20v?

25v, with lots 'o ripple- the 5VSB cap, yes, just one of them, seems to be "hiding out" behind the heatsink...

A Deer, perhaps? "Model number" (that they pulled outta their ass) is the same format. xxB-450.

[ben7]

Re: the gutless, bloated, and fried power supply hall of shame

Looks just like the free-with-tigerdirect-case power supplies.

Because it is.

Looks like undersized traces overheated, discoloring the board... The winding varnish is not discolored.

What isn't?

No X-rated line-to-gnd caps
"Invisible" RFI/EMI filter
Undersized wiring, complemented by overfusing

25v, with lots 'o ripple- the 5VSB cap, yes, just one of them, seems to be "hiding out" behind the heatsink...

In "what is wrong with it" I meant, is there a short on one of the rails? Blown transistors? 5vsb overvoltage, etc...

Lol at the 25V on the 5vsb!

[kaboom]

Re: the gutless, bloated, and fried power supply hall of shame

Lol at the 25V on the 5vsb!

If a little (voltage) is good, more (voltage) must be better!

I can't believe this was used in a computer for years.

And this one isn't even as bad as the "Adam-Puter" was. With the saturn caps that one had, the HDD and fan motors were screamin', as was the VRM!

Leadmans may run hot and be sloppily built, but (oh)Deers are complete overkill! You can just eliminate the secondary rectifiers and caps, and dump 12VAC at 50kHz into the system. What's the difference??

[Pentium4]

Re: the gutless, bloated, and fried power supply hall of shame

Wow, look at how smokin hot that filter choke got!

I guess those caps survived because they weren't mounted next to any hot components xD

What is wrong with the psu? Does the 5vstby read 5v, or does it read 20v?

Wait till I get more pics, the minimum load resistor on the 12V got so hot that the PCB next to it is almost black and all the color bands faded off! I have a junk Intel mobo here with bloated KZG caps and a Pentium D. I will load it up until it explodes

If a little (voltage) is good, more (voltage) must be better!





And this one isn't even as bad as the "Adam-Puter" was. With the saturn caps that one had, the HDD and fan motors were screamin', as was the VRM!

Leadmans may run hot and be sloppily built, but (oh)Deers are complete overkill! You can just eliminate the secondary rectifiers and caps, and dump 12VAC at 50kHz into the system. What's the difference??

kaboom you crack me up man

[Pentium4]

Re: the gutless, bloated, and fried power supply hall of shame

Linkworld LPK2-30. I am somewhat surprised by this thing actually, but it still sucks. 470uF Fuhjyyu input caps. Really surprised to see a 6A bridge and 12A TO-247 switchers. What else is surprising, no fast recovery rectifiers, and the biggest one is on the 12V. 3.3V = 20A, 5V = 20A, 12V = 30A. And...it even has a good size inductor on the 12V, but a Fuhjyyu cap... Sleeve bearing fan wired straight to the 12V 5V minimum load resistor is burned up.

I would consider recapping this and replacing the fan if the main transformer wasn't microscopic.

[Behemot]

Re: the gutless, bloated, and fried power supply hall of shame

I am just curious, what the hell do you do that you have time to dive into such crap basically every single day?!

[Pentium4]

Re: the gutless, bloated, and fried power supply hall of shame

Customers recycle their old computers and I have dibs on pretty much anything that I want, and the rest goes to a company that takes what we don't want. I reuse lots of parts and sell used computers as well