FSP Blue Storm Pro - Auto Protect Shutdown

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I received the PSU today. A quick check revealed a shorted 12V output rail, which is caused by a half dead dual Schottky rectifier. I replaced it, and was able to turn on the PSU but very briefly for a few seconds before the protection kicks in and shut it off.

I'm not sure what is wrong.

All output rails seem ok, with 3.3V maybe a bit higher at 3.6V

Interesting to note, my light bulb is shining brightly while the PSU is running, like there is a short, instead of blinking rapidly as usual when there is an active PFC circuit involved.

PSON is 3V

Any idea what to check?

Should I disable the protection just to see what will happen if there is no auto shutdown?

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SOLVED. As I supected, it was indeed my DBT that caused the restart cycle.

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Wanted to upload more photos, but not allowed when I clicked Save.

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I think my dim bulb tester is preventing the PSU from working correctly.
The PSU is actually going into a repeating cycle, where it will stay on for a few seconds then off.

I'm just taking a guess here, but I believe it is because the DBT is limiting the current, and somehow it messes up the supervisor IC OCP detection.

It begins right after I reconnected the 12V fan. Before that, the PSU stayed on, hence I was able to measure the output rail voltages.

Hopefully nothing will go bang if I try it again with the DBT bypassed.

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SOLVED. As I supected, it was indeed my DBT that caused the restart cycle.

[stj]

what lamp wattage did you use?
i have 40/60w - cant remember which, AND a 120w for times like these

[CapLeaker]

I use 40w, 60w, 100w and 150w light bulbs. I think you use a lower wattage bulb. Do not load the PSU hard and use the light bulb.
If you limit the current to the PSU on one side, the PSU’s primary has to work harder.

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Hi all, yes I agree. I need to add more lamp sockets and switches for them

I'm using a 60W, I have two of them, and also a 40W. Can always get more because they are cheap.