Hor sync problem

[Giulio Maiocco]

Hi,

I think I found the problem: now the TV won't synchronize, no matter what you do to it, so I hooked up my old trusty (tube based) Oscope to the test point on the hor oscillator coils and, surprise, there is no trace of the two typical toes, just a plain sawtooth. Now that reminds me that when the TV was working, I saw the toes disappearing for the brief moment the TV lost sync... What does it mean?

Please excuse my poor English!!

Thanks

Giulio

[Giulio Maiocco]

Hi,

A little update:

The toes displayed with the oscilloscope hooked on the hor osc coils test point sometimes reappears, but they won't last for more than a second. I also noticed that the sawtooth waveform varies the amplitude randomly. When I try to adjust the regulations on the hor osc coils, I obtain a raster only on a small portion of the range of regulation and at the same time the 1B3's filament comes on, otherwise it is dark..

Any suggestion?

Thanks

Giulio Maiocco