Kelly,
I´m no expert, but the pics you show us are of a receiver with Darlington Power Packs on the outputs.
Those Darlington Power Packs were widely used in the 70´s in many receivers, and I believe they comprised a lot of output transistor equivalents in just one small package.
I know for sure that some highly respected Sanyo Receivers from the 70´s used them, including the JCX-2400 that I have had at a Tech´s to be repaired for well over a year ( I think I´ve lost all hope of ever getting it working now ) as well as some of the MOTL Pionner and Technics units too.
IMO your receiver is not a chip unit. I believe modern chip amps are different beasts all together, mostly class D, based on highly efficient switching power supplies, as used in car-audio, hence the reason they can be powered by batteries or smallish DC adapters. I´m sure you understand now why they are looked down at by audiofools, sorry, audiophiles.
Again, going back to your receiver, you can see a large power transformer, as well as some large caps in the power supply. All classic stuff.
I´m sorry to break the bad news to you, but I don´t think you own a chip amp.
Jorge