Hi Guys
I have this Newton Power NPS-400AB ATX PSU here. It powers up, runs for a few seconds then shuts down. If you power it off at the mains then back on it repeats the same actions
It's a bit of a beast, it has two PCBs. As best I can tell one PCB has the PFC and 5V STB circuitry, the other has the main switching transformer and secondary output inductors and capacitors. It looks like the voltage comparators and PWM controller are on a vertical PCB on the low voltage side.
There is a 10 way connector between the main supply low voltage side and what I think is the 5V STB secondary side on the other PCB but I can't imagine why this connector needs so many wires if that is what it is. Actually some pins are connected together so there are 7 individual wires on this connector.
All the electrolytic capacitors look OK, visually
Does any one have a schematic for this or some experience of these PSU and can advise what may be the problem.
Thanks
I have this Newton Power NPS-400AB ATX PSU here. It powers up, runs for a few seconds then shuts down. If you power it off at the mains then back on it repeats the same actions
It's a bit of a beast, it has two PCBs. As best I can tell one PCB has the PFC and 5V STB circuitry, the other has the main switching transformer and secondary output inductors and capacitors. It looks like the voltage comparators and PWM controller are on a vertical PCB on the low voltage side.
There is a 10 way connector between the main supply low voltage side and what I think is the 5V STB secondary side on the other PCB but I can't imagine why this connector needs so many wires if that is what it is. Actually some pins are connected together so there are 7 individual wires on this connector.
All the electrolytic capacitors look OK, visually
Does any one have a schematic for this or some experience of these PSU and can advise what may be the problem.
Thanks
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