Dorothy's back, too.
Other issues remain, but color sync isn't one of 'em.
The most recent set of color bars were from the test pattern DVD. I just tried the generator again, and with its stronger signal it's easier to get better color bars -- including magenta, for instance, and a deep blue.
I'm playing the TV for a few hours -- Gone With the Wind, for a change -- to see whether this improvement sticks. Then I'll pull the chassis back out and take another look at the color circuts while dealing with some other stuff. I'm inclined to set the generator aside and use the test pattern DVD from here on out. The ultimate goal is to watch movies and TV, not generator patterns.
Thanks,
Phil