pun84
New member
I've had this U2000 broken on my shelf for a while now.. Tested the power supply with a bulb, works fine.. Found a shorted HOT and changed it..
Now the B+ was set to 126-127V, and the chassis seems fine.. however when I power it up cold again the next day (on my variac) the B+ shoots up to 140-150V+ and the B+ adj pot doesn't change B+ at all..
Then i'll cycle the power off and the B+ will be normal again at 127V and adjustable via the pot... I checked the flyback, it seems okay.. not sure where to go from here though
any ideas?
thanks
Now the B+ was set to 126-127V, and the chassis seems fine.. however when I power it up cold again the next day (on my variac) the B+ shoots up to 140-150V+ and the B+ adj pot doesn't change B+ at all..
Then i'll cycle the power off and the B+ will be normal again at 127V and adjustable via the pot... I checked the flyback, it seems okay.. not sure where to go from here though
any ideas?
thanks