Hi
My ps-305d 30v 5A power supply '' FINE'' range didn't work properly so I opened it up and I just figured out that it was a 1k dual-line pot that u can adjust the voltage at about 0 to 2.5v the button of it didn't work I didn't have 1k dual-line pot instead I attach 50k then my power supply showed short-circuit on the output display nothing wrong happened like smoke or something but I no longer have the ability to control the voltage I just can control the amp section and by the way, the output polarity protection diode didn't short and I also tested the output ohmage it showed 850ohm not short-circuited.
Can u please help me how to fix it?