Hello Dav, also my set has the chassis 12A10C15
Weighs a ton
Uh... I checked some voltage, and the main is 235V instead of 288... When I start the set is all ok, but when flyback works it fall to 235V... I disconnect the rest of the chassis from the power supply and I measured 288V... Oh God not a bad flyback...
EDIT: I have tried to reduce the AGC gain with his trimmer for testing, the trembles are reduced but no stopped. The left side of screen trembles more than the right side...