Yes, it did!
You completely legally could buy a TV with the schematic included, use the schematic to modify your TV however you liked, and sell the modified TV. You could even use the schematic to develop some sort of modification-add-on for that model of TV and sell that add-on to people who wanted to modify their own TV. And that includes using any internal functionality of the TV whatsoever, and implementing any functionality whatsoever. If there was some function of a better model present on the PCB with just a few parts missing, you were perfectly within your rights to add the missing components and thus upgrade your TV to the premium version. And you were perfectly within your rights to tell others about how to do it. Or to sell kits with everything you needed to do the modification yourself. Or to sell the upgraded devices. Or to offer the modification as a service.