As the title says - I have here a Hiper PSU model HPU-4S525 that came with a blown to smithereens APFC board, blown fuse and main caps.
So far this is what I did:
-remove the APFC board
-jumper the PFC spot on board*
-replace all capacitors - it had bulging caps on both primary and secondary
-test main FETs - all check fine
With no success so far. I temporarily replaced the fuse with a 60W lightbulb (the old fuse was blown anyways) so I could prevent any part go nuclear.
Symptoms:
-without shorting the PS_ON wire, 5vSB comes up okay at 5.1V and lightbulb flashes one time accordingly then stays dark as it should
-shorting PS_ON however will result in the lightbulb remaining bright, no voltages present on the secondary, until I cut the AC power.
Is there anything I might have missed out?
ICs present on this PSU:
-TL3842 - near main input wires
-2x LM339 - one near the secondary caps, the other on a mounted PCB near 12v wires.
Finally, I'm leaving a few pictures of it in hopes somebody can tell me what I should check and possibly remove.
So far this is what I did:
-remove the APFC board
-jumper the PFC spot on board*
-replace all capacitors - it had bulging caps on both primary and secondary
-test main FETs - all check fine
With no success so far. I temporarily replaced the fuse with a 60W lightbulb (the old fuse was blown anyways) so I could prevent any part go nuclear.
Symptoms:
-without shorting the PS_ON wire, 5vSB comes up okay at 5.1V and lightbulb flashes one time accordingly then stays dark as it should
-shorting PS_ON however will result in the lightbulb remaining bright, no voltages present on the secondary, until I cut the AC power.
Is there anything I might have missed out?
ICs present on this PSU:
-TL3842 - near main input wires
-2x LM339 - one near the secondary caps, the other on a mounted PCB near 12v wires.
Finally, I'm leaving a few pictures of it in hopes somebody can tell me what I should check and possibly remove.
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