Coolermaster Extreme Power Plus 550W design problem

[aanev]

Re: Coolermaster Extreme Power Plus 550W design problem

I'm running them on office pc with core 2 duo and onboard graphic that work on noname 300w psu without any problem.So is there any way to bypass this active pfc or add some resistor somewhere or maybe even short the coil or put a coil with higher inductance??
Maybe main capacitor is too low or too high in capacity foor that coil??
Question is more technical, because again I think it's design problem not usage problem or defective part.

[ben7]

Re: Coolermaster Extreme Power Plus 550W design problem

They are running them too hard. They also seem to be somewhat undersized!

[aanev]

Re: Coolermaster Extreme Power Plus 550W design problem

It's not a fan problem, I think it is design problem by manufacturer, every second or third is failing same way. Even if you open it after 15minutes when it is still new and try to put finger on that PFC coil you'll see that it is very very hot..

[shovenose]

Re: Coolermaster Extreme Power Plus 550W design problem

Mine had a failed fan when I got it, after putting in a working fan it still smells. Same issue?

[c_hegge]

Re: Coolermaster Extreme Power Plus 550W design problem

The one thing that usually goes wrong with these is that the fans quit and the unit cooks itself. I assume the fans on these still spin freely?

[aanev]

I have many of this power supply with Active PFC, and first they start to smell and after that they stop working. I open it and smell comes from the positive high voltage just after the 220V rectify. They have Active PFC coil that is always very hot and start to burning, and after some time if coil burns there is one big mosfet that is failing short. So in my opinion there is some problem with the design,can someone tell me a way how to bypass this Active PFC part like in noname PSU, or what else can burn this coil, maybe main Capactitor that is measured good?