|
The bright areas are probably due to the beam lingering in those areas or retracing them.
I'd be more concerned about the fact that it looks like a negative image.
It could be the vertical sweep frequency being far off. Try adjusting vertical hold and similar things. There may be a coarse vertical adjustment.
Sometime a bad video detector will cause a negative image.
I don't think I have every seen anything like that screen.
Make sure the crosshatch signal is not so high it overloads the set.
|