Thanks for all the helpful pointers. I guess a good place to start would be to get the service literature on it. I know that SAMS has it but maybe I'll poke around a bit to see what I can find for free.
I played around with it a little over the weekend, getting reacquainted with the set. The gain for the green channel was already maxed out, so I suspect that the green gun may be weak. I don't have a CRT tester to confirm this. I see that a silicon rectifier near the vertical output transformer has been replaced. Other than that, and my soldered jumpers, all looks original. I set the kine bias control by eye-- probably not a good idea. It has a control labeled "noise" that behaves very similar to an AGC control.
I almost got rid of the set numerous times over the years. But now I'm glad that I kept it
-Clark