RetroHacker
Well-known member
OK, I'm really puzzled by this one. Working on a Sanyo, it was in horrible shape when I got it - bad flyback, HOT, filthy, etc. I fully recapped it, replaced the flyback with one of Chad's replacements, replaced the HOT, new fuse, new 180ohm 20W resistor, etc. Finally got it to power up and display a white screen, trying to adjust the B+ I was having problems that I had attributed to the really flakey old pot.
Well, I just replaced the pot, and I'm still having problems. Basically, the monitor stays on with a B+ of 95v or so. But as I adjust the B+, the highest I can get it to go is around 98.5 volts - at which point the monitor shuts down and the voltage shoots up to 134v. The pot is good, I can measure it's resistance smoothly through it's travel.
And yes, I am powering this through a Nintendo 100v isolation transformer (albeit on my bench, but still, it's a real Nintendo isolation transformer).
-Ian
Well, I just replaced the pot, and I'm still having problems. Basically, the monitor stays on with a B+ of 95v or so. But as I adjust the B+, the highest I can get it to go is around 98.5 volts - at which point the monitor shuts down and the voltage shoots up to 134v. The pot is good, I can measure it's resistance smoothly through it's travel.
And yes, I am powering this through a Nintendo 100v isolation transformer (albeit on my bench, but still, it's a real Nintendo isolation transformer).
-Ian
