Hello everyone,
I recently got three ATX PSUs which I plan to use as bench supplies. I've successfully managed to get one of them (250W) converted and running as bench supply. But the other two a 150W and 180W. The former only has a click when I power it up and has no output voltage nor does the fan spin.
Now the third 180W PSU is the one my question is related to. I shorted the GREEN and BLACK wires and the PSU fan is spinning and the out put on +5V and 3.3V rails are 4.9V and 3.4V respectively. But on the +12V rail the output is only 9.7V and when I connect a load (CPU fan) on the +12V rail it did not run and the PSU shut after like 10 sec. I even tried connecting it to my UPS and it is when I noticed that the "SITE FAULT WIRING" LED came ON. Anyone has any idea what could be the issue here.I know there is high voltage and precaution needs to be taken so if its a small issue that I can rectify I'm planning to rectify it by myself. Thanks in advance guys.
I recently got three ATX PSUs which I plan to use as bench supplies. I've successfully managed to get one of them (250W) converted and running as bench supply. But the other two a 150W and 180W. The former only has a click when I power it up and has no output voltage nor does the fan spin.
Now the third 180W PSU is the one my question is related to. I shorted the GREEN and BLACK wires and the PSU fan is spinning and the out put on +5V and 3.3V rails are 4.9V and 3.4V respectively. But on the +12V rail the output is only 9.7V and when I connect a load (CPU fan) on the +12V rail it did not run and the PSU shut after like 10 sec. I even tried connecting it to my UPS and it is when I noticed that the "SITE FAULT WIRING" LED came ON. Anyone has any idea what could be the issue here.I know there is high voltage and precaution needs to be taken so if its a small issue that I can rectify I'm planning to rectify it by myself. Thanks in advance guys.