Bill's suggestion about checking (or changing) R65 sounds good.
If it's any consolation, sweep problems are very common in old TVs. I'm nearly finished recapping my RCA 721TCS, which has both vertical and horizontal issues in its current state:
It still contains bogus caps and many unchecked resistors, so I'm hoping these zits will clear up in the normal course of things.
You are definitely getting closer with the Majestic. In some ways, this is the most exciting part of a restoration. You can see that success is within reach!
Perhaps it's my short attention span, but once a TV is working normally, I tend to lose interest and get an itch to start the next project. Yes, I can sit around and watch it, but there's nothing fun to
do with it, if that makes any sense.
Phil Nelson