Huntkey PSU HK340-72fp Problem

[PapaFi]

Hello, I have this PSU and wanted to repair. I already forced ON the unit by connecting the gray wire (ps on) and black wire (grnd). Result was no output for all the voltages. Main cap reads 301vdc, mosfet drivers not shorted. And obviously no voltage thru the secondary chopper. Do you have a copy of schematic diagram for this PSU?

Expert opinions and Tips are welcome.

Hope to hear from you, Experts!

Thanks...

[EonFlask]

Re: Huntkey PSU HK340-72fp Problem

possible that your resonance IC is the main problem