Electronics > Repair
Ferrus power fp250-710 power supply repair (mystery part)
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super7800:
Just got an osciliscope for cheap, the nicolet accura hv100. Owner said it was smoking, so immediately removed the power supply for testing. Seems to use a standard pc power supply. Powered it up, and sparks came flying out of the chip pictured. Obviously catastrophic failure lol. Of course, the chip part number is now unreadable. Does anyone know what chip it is, or a way for me to find out? Thanks.



amyk:
See if you can find the top, it should still be somewhere in the case.

Otherwise you'll have to reverse-engineer the circuit to determine what it was supposed to be.

That said, I've never seen sintered glass diodes in a PC PSU before.
super7800:
Thanks. I had already looked, but I looked even more and found the top. I had thought it had shattered or shot off somewhere. It was a top223p. I'll order a new one, and hope it fixes the issue.
perieanuo:
yep, top's are not TOP  |O , i noticed the same myself on some burnt power supply
super7800:
Purchased a new part, and the power supply worked! For about 20 seconds :(. Perhaps it was counterfeit, but it failed in the same way as before so I don't believe that's the issue. I have ordered 10 more from a different seller.

I'll look at the datasheet, and start testing other components. It was a very violent event with both, I actually saw the second one fail, it let out quite some pretty lights lol. Does anyone have any suggestions? I'll look at the other components and report back if I find or don't find something lol. Thanks.
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