Re: Firestone 13G3 Television
Last minute: a friend bring me an oscilloscope, so it surely help for further investigations on repairing this set. Actually I get a strong noise in the loudspeaker aparently coming from the RF/IF stages, changing with the contrast and/or channel selector position. Last photo show a raster which looks like a very poor vertical linearity frame. I think about a strong interference coming from the previous stages affecting the sync signal.
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