Im wondering since focus is just voltage supplied from the power supply to the focus coil that a connection issue is up because focus rheostat is good as well as the sand resistor as well as the focus coil itself. I had the tv on its side and ok yeah I got some focus adjustment back, put the tv right side up no focus. Gotta be a connection issue and I suspect that power socket plug rear of tv for starters.
Messed with the horizontal linearity adjustment because it was screwed most of the way out like an inch and almost a half of threads sticking out. I can get picture to stop rolling and almost sync up but not sure what to adjust next unless controls on the back are still way out of adjustment. I tried flipping around the ionmagnet and that made centering a nice bright picture much worse only half the image showed up so I put it back the way it was.
I figured well maybe they messed with the magnet and screwed that up too.
Not sure how the 12k ohm resistor is affecting me getting an actual picture. but focus is still no go.
https://youtu.be/4_xPEqhBqdU