Re: the gutless, bloated, and fried power supply hall of shame
What a gutless POS! 450W? For how many picoseconds?! 200W might have been pushing one's luck! And judging by the toasty wires on those O/P inductors, some one did try to get significant current from that thing (I think that inductor wire that is lifted from the PCB, if it wasn't desoldered for troubleshooting, may have gotten hot enough to desolder itself). The O/P inductors' cores probably were hot for a long time and their magnetic properties have probably changed significantly. I would suggest either stripping off the wire from the things for recycling or simply trashing those inductors along with the rest of that alleged power supply! Don't reuse those O/P inductors for anything you care about!
Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
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To kill personal responsibility, initiative or success, punish it by taxing it. To encourage irresponsibility, improvidence, dependence and failure, reward it by subsidizing it.
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Re: the gutless, bloated, and fried power supply hall of shame
Definitely Keerda. At least they used the ST rectifier on the 12V. But there isn't much good to say about that power supply... At least it has half an input filter?
Re: the gutless, bloated, and fried power supply hall of shame
They don't get much more gutless than this... Wonder what's up with the caps tho, as the warranty seal wasn't broken.
Attached Files
Originally posted by PeteS in CA
Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
Re: the gutless, bloated, and fried power supply hall of shame
On the upside, quite a lot of space between primary and secondary, lots of space between high voltage traces, room for additional filtering on primary side, big heatsinks, no two diodes treatment for 12v....
Shame the main transformer is so weak.
Why did it die, can't figure it out (that inductor is obvious but what made it burn) ?
Why did it die, can't figure it out (that inductor is obvious but what made it burn) ?
Partially seized fan. The caps didn't have time to cook fortunately. 5vsb was fine, so i replaced the output inductor and it fired right up. Went back in the computer, coz well, owner was cheap.
Powered a 1.6GHz Celeron 420, 1GB RAM, Geforce 7200 and a single hard drive, so not much load on it. But it was still a pathetic PSU. 12A fast recovery on 12v, linear regulator with MOSFET for 3.3v (hey, at least it supplies clean power), and the diode on the 5v had its part number scraped off. Most likely 30A judging by its size. Seen worse, but still pathetic... The diode on the 5vsb is a joke tho, that looks like a 2 amp job at most. At least they left its leads long so it has a chance to catch some cool air.
Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
Those output inductors are rather stressed in these cheep POSes, more so than even in "StupidPowers." Linkworlds were like this- good sized transformer, but the too-small output inductor would "smell" below rated output. The 12V windings were too small upon examination. Too much load on +12 for too long would easily result in shorted turns. And cooked cores and blown switchers.
The caps didn't have time to cook fortunately. 5vsb was fine, so i replaced the output inductor and it fired right up. Went back in the computer, coz well, owner was cheap.
What else is new? At least you got to fix it and save the computer. As you know, some people are content to run their stuff on raw AC, as supplied by a Deer!
Powered a 1.6GHz Celeron 420, 1GB RAM, Geforce 7200 and a single hard drive, so not much load on it. But it was still a pathetic PSU. 12A fast recovery on 12v, linear regulator with MOSFET for 3.3v (hey, at least it supplies clean power), and the diode on the 5v had its part number scraped off. Most likely 30A judging by its size. Seen worse, but still pathetic... The diode on the 5vsb is a joke tho, that looks like a 2 amp job at most. At least they left its leads long so it has a chance to catch some cool air.
Aww... From the days when 5VSB was still an afterthought.
What were hiding with all that grinding?? I mean, they could've actually made it "challenging," by grinding that PWM IC.
Those output inductors are rather stressed in these cheep POSes, more so than even in "StupidPowers." Linkworlds were like this- good sized transformer, but the too-small output inductor would "smell" below rated output. The 12V windings were too small upon examination. Too much load on +12 for too long would easily result in shorted turns. And cooked cores and blown switchers.
I was gonna say, There's more to it than just the fan. Take the Delta GPS-300AP I posted here on page 7 for example. The fan on that one was completely stuck, the PCB was badly darkened and just about every single cap was vented. However, the toroid coils are still fine. It's in my parents PC now with the original main toroid coil.
Wonder what's up with the caps tho, as the warranty seal wasn't broken.
Maybe it was refurbed by some Chinese company with whatever used caps they could find from junk/e-waste?
Other than that, I really have no clue.
Originally posted by kaboom
What were hiding with all that grinding??
Those should be 30A 45V rectifiers. But I imagine it's probably the same deal as with RAM modules from "lesser" known manufacturers... i.e. these particular rectifiers were likely bought on the black market or under the counter from some manufacturer who had a bunch of parts that didn't quite meet specification (i.e. refused parts).
Given the cap brands, this PSU is one hell of a "late night shift" job anyways. So for the time being, I will stick with that theory.
Originally posted by Pentium4
Edit: LOL @ the label right below the brand name "Demand More"
Really funny indeed. With that small transformer and that cooked torroid, they really should change that to "Do NOT demand more" . Or "Demand More. We dare you"
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