On The Six Million Dollar Man, there was a rare Sony LV-1901 console with built-in Betamax in Oscar Goldman's office. And in the episode of The Bionic Woman where the scientist made a weather control machine, there was a whole bank of CTC-46 25" table models.
I think Lucy and Ricky had a Westinghouse 21" blonde console on a few episodes, and other times it was a fake prop TV.
In Happy Days, there was an episode where one of the guys (might have been Potsy?)was trying to pick up girls by telling that he had a TV in his own room... I tried that and it didn't work anymore by the early 80s
In Mr. Ed, there was a 19" Packard-Bell Astronaut that was on a wheeled stand in the barn.
But in all of the cases I tell here, I think just about every show switched TVs periodically. In fact, I remember Oscar Goldman also having a Sony KV-5000 on his desk in some episodes, as well as the LV-1901.
Charles