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Why not just poke around in the chroma
of area with your scope?
See if the oscillator is oscillating. If so, then ...
Look for a burst at the output of the burst keyer.
Do note that the color won't sync unless the horizontal
is working correctly. I don't know if the color killer will kill the
color if the horizontal pulse driving it is not right. It doesn't
on my CT-100.
It seems that you already have scoped for seeing color subcarrier
somewhere in the video, and not seeing it. But was the horizontal output tube replaced by then? If not ... expect problems because the AGC won't work
without it. On my CT-100 the IF response becomes hopelessly narrow
and peaked in the middle
of the channel.
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