I would be extremely careful around those PC boards, as they get brittle with age. I had a Silvertone (RCA CTC12 clone) roundie color TV in the early '70s that worked fairly well, until I tried to replace a tube on the video output panel. The tube socket broke out of the board,
ruining the set (I was in no position at the time to repair the board). I've been wary of PC boards ever since.