Here is a 500 watt cutie. It arrived with stuck fan, output capacitor on all three rails were bulging, one of the diodes on the 5 volt output rectifier was shorted, and the FET linear regulator on the 3.3 volt rail was shorted. I replaced the S20C40 output rectifier in the 5 volt rail with a S20C45 from my junk box. I figured that an extra 5 volts wouldn't hurt. I replaced the CEP3120 FET in the 3.3 volt rail with a CEP603 from my junk box. It was only 5 amps less than the original, but probably wouldn't hurt. The output rectifers on the 12 volt rail are two single diodes soldered to a small frame. They measured OK. I had a fan of the exact same brand in my junk box, so replaced the fan rather than repairing the old one. This 500 watt cutie uses a pair of 13007 transistors for the switching circuit. Input main capacitors are RICON 330 uF/200 volts. The Y caps are ceramic capacitors, a money saving Chinese innovation. Diodes used for the input bridge rectifier are 1N4004. There is no line filter, just jumpers where the line filter transformer should go. I replaced the bulging RICON capacitors in the output circuits with capacitors of equal voltage rating and equal capacitance from parts in my junk box. The output circuits do not have pi filters, just a single capacitor.
This 500 watt cutie is now working. Just need to find a mother board that needs 500 watts so I can test the power supply under load!
This 500 watt cutie is now working. Just need to find a mother board that needs 500 watts so I can test the power supply under load!
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Im pissing my self over that haha 
. I guess I beat you on the epic fan revival. I had a stuck Mitachi Spacefan that was so stuck, that I actually needed to hammer out the shaft away from the sleeve bearing. Shaft broke from the fan blade assembly in the process, but I glued it back together after getting the shaft out and cleaning the bearing. Fan works now, though it is slightly off balance and a bit noisy.
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