I have repaired a few PC PSUs before, but the problem has always been a broken Mosfet and blown capacitors fails. Now I am facing a PSU problem that I haven't seen before.
I have a Xilence 1200 PSU that had 4 broken capacitors on the 5V and 3,3V lines, and a faulty mosfet driver (A6069H). After replacing these components, the PSU starts up and turns on the fan providing all the correct voltages at the output, but shuts down after a second. when the output is low again (capacitor discharge, I guess), the PSU starts up again and repeats the whole process.
I think it has to be with some kind of overvoltage or overcurrent sensor, but I can't find the faulty component. I have also tried connecting a small 12V motor to the 12V output and I see that it keeps restarting but the motor turns (I guess I shouldn't try to connect an inductive load, but that's what I have...).
I uploaded some pics with a red circle/square over the replaced components.
I have no idea how to proceed. Any advice or hints would be appreciated. Thanks in advance!
I have a Xilence 1200 PSU that had 4 broken capacitors on the 5V and 3,3V lines, and a faulty mosfet driver (A6069H). After replacing these components, the PSU starts up and turns on the fan providing all the correct voltages at the output, but shuts down after a second. when the output is low again (capacitor discharge, I guess), the PSU starts up again and repeats the whole process.
I think it has to be with some kind of overvoltage or overcurrent sensor, but I can't find the faulty component. I have also tried connecting a small 12V motor to the 12V output and I see that it keeps restarting but the motor turns (I guess I shouldn't try to connect an inductive load, but that's what I have...).
I uploaded some pics with a red circle/square over the replaced components.
I have no idea how to proceed. Any advice or hints would be appreciated. Thanks in advance!
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