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I've solved the video problem on the CTC78. There was no 240V going to the video output circuit due to an open R105 (180 ohm, 1 watt). R106 (18 Kohm, 1/2 watt) was also burned open. I'm sure this was due to excessive current being drawn through it when R105 opened.
Now, I've got to clean (if that's possible) those slide controls. They are hard to move and very touchy when they do move. I've never seen those slide controls on an RCA that actually worked right. Whoever came up with those needs a good butt kicking.
There is also an electrolytic going bad in the power supply. I can see a slight weave moving up the screen and there is some very slight pulling in on the sides that changes as the weave moves up the screen.
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