Nvr supply Delta DPS-300AB-81B circuit

[alltvrepairs]

Hi
Am trying to repair this supply. Do we have a circuit pls?
Goynd Mosfet blown. Replaced, check for other shorts 9rvopen bias resistors but blew again at switch on.

Outputs: +12v , -53v.


Regards
Darren

[alltvrepairs]

Re: Nvr supply Delta DPS-300AB-81B circuit

The problem is in the PFC curcuit blowing Mosfet.
Uses IC CM6800 pfc contrller. Supply pins +16v healthy.

[CapLeaker]

Re: Nvr supply Delta DPS-300AB-81B circuit

If the mosfet is shorted to the gate, chances are that the gate drive blew up too. So yes, that includes the pwm and anything between it and the gate of the mosfet.