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Its common on the rcas for a trace on the edge of the board to crack and cause exactly this. I dont know if the sylvanias have this but its worth checking out.
The voltage you want to check first is the horizontal output SCREEN and the grid.
If the grid is too negitive (should be something like -50, if it -60 that the problem) and if the screen is low check the resistor providing power to it. This is also the symptom of a weak horizontal output tube, in that case the screen would be high.
The trace that cracks on the rcas basically causes excessive drive and low horizontal output/width/hv....your exact issue.
I should add that the trace connects to the grid of the 6GU7 horizontal blanker tube. There is a 390k resistor on the grid of the 6GU7 that goes from grid to ground and the trace connects that 390k to ground. If the trace or resistor goes the grid of the 6GU7 foats
Last edited by ctc17; 12-19-2012 at 10:28 PM.
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