Zhinü
Well-known member
I’m having a weird vertical linearity issue with my Lisa after replacing the potentiometers in both the PSU (the brightness and focus) and also the video board 5 pots. The tube has also been swapped but switching back to original does not fix it.
No amount of adjusting the vertical linearity seems to bring it back, only collapse it into a line if I go too far. I’ve noticed that I accidentally put a 200kohm potentiometer for the height (when the original was 100kohm), but the schematics say to put a 200kohm. Prior to replacing the potentiometers, the linearity was mostly fine. I don’t have the originals unfortunately anymore.
Would anyone have any ideas on what could be happening?
No amount of adjusting the vertical linearity seems to bring it back, only collapse it into a line if I go too far. I’ve noticed that I accidentally put a 200kohm potentiometer for the height (when the original was 100kohm), but the schematics say to put a 200kohm. Prior to replacing the potentiometers, the linearity was mostly fine. I don’t have the originals unfortunately anymore.
Would anyone have any ideas on what could be happening?