Yes, yes. I also found that as time went on they tried to stick you with having to buy individual parts in addition to the costly boards. I remember having to sub some IC in one of those because the sets owner would not pay the price that oem parts cost. I always took risks with things like that, but always did my HW and worked out every possible outcome first. Who knows that set could be running somewhere right now( On its 17th CRT, granted.
) But that even changed because the new Sonys in the 90s and even in the 80s would be VERY unforgiving about subs, and no amount of HW would let me get away with that...
It is a shame that zenith didnt stick with the modules, at least you always had some lying around, and you could repair 'em if needed.