Annoying brightness issue in Zenith CCII's

[TUD1]

I first noticed this on my 1976 13" CCII, now I'm noticing it with my 1976 19" CCII. In order to get some shows bright enough to watch, you have to crank the brightness and contrast, but when you do that, the TV guide becomes WAY too bright. I like watching my 19" delta gun CCII, but that constant readjustment is a pain. You can see in the top right, the actual program looks normal, but the guide is extremely harsh.