[Giulio Maiocco]

Stupid question, but are the various parts of the image somewhat overlapping each other? If so, the problem may be spurious oscillations in the vertical section or maybe the horizontal pulses are coupled somewhere in an unwanted location in the TV set, rendering the vertical scan so "strange". If this is the case, I'm afraid, it's usually oscilloscope time

Cheers

Giulio

Edit: not exactly the same problem, but the image attached should clarify what I meant in my post