I have a question on the screen image, there is something that does not look right, but I am not sure if down to bandwidth, ringing or just a poor tube?
Looking at these two images, where the horizontal lines are OK there can be two or multiple vertical lines on the screen, this has the general effect of making the image look blurry, unfocused etc.
So any clues as to where I should I be looking ? If it is down to bandwidth, then I may well need assistance from someone on the matter.
The only references I can see in the service manual is to :-
De-focussed vertical line a) Line deflector coils SC. b) Line to Line deflector coils OC.
I tend to think this fault refers to a single white vertical line, which is obviously not the case but do wonder if it may be a symptom of some shorted turns?
Anyway I pass to you experts for advice.
Adrian