This power supply is for plasma cleaning and has no output.
+/-15V, generated from separated two PSs and connected via fuses, are measured from the main board.
No output is measured from 10V output terminal which supplys primary voltage into the transformer.
When I checked between primary 10V output and GND, they are short each other.
I am not quite sure but IRF640 N channel mosfet which drain is directly connected to primary output. It seems to have burning mark like attached picture.
I don't have proper soldering tools to remove it but I will prepare tool and spare part and will try to repair it.
I share one more picture of the front and back side of PCB.