I remember, not very fondly either, of running into those "Component Blocks" in AA5 radios and a couple of models of TV sets.
They were encapsulated in a red or orangish brown "ceramic sort of" substance and had a high failure rate.
They became unobtanium extremely early from the mfgr's. too.
Trying to determine which part went bad in them, and trying to repair them was a true nightmare.
The parts were crisscross stacked and interconnected then covered with the coating. No idea as to which part was what.
CentraLab made their CRL radio & TV modules or networks that at least you could troubleshoot, and they were fantastic in the fact that in their replacement catalogs, they had the full schematics of them.
I still have a stack of them, NOS around someplace. Theirs were laid on a ceramic substrate too. They did fail, but not very often, and I believe the main failures were inherently caused by the TV mfgr's. who's engineering dept. was not really competent.
They also made the same type of network for the input of TV sets antenna connectors to the tuners.
I never saw a bad one of those unless they were physically damaged or the antenna wire took a direct lightening hit.