I have the RCA manual, and also the Sams if you like I can send them. Here's a picture of the RCA factory schematic, and a close-up of the power supply. I doubt it will show good enough detail on the main schematic, but hopefully the power supply will get you started.
That's such a great feeling to pull the back off a set and see near-virginity!!!! It's so the opposite of finding a couple of missing, tubes, and wires unhooked from the FBT, and a cluster of tubular electrolytics taped to a failed can, etc etc...
I think that set might have selenium rectifiers, but I might be off on that. The schematic looks like regular silicon diodes, but I'm not sure if there was a different symbol for seleniums back then. If it does, I'd bet they're leaking and need to be replaced with B+ diodes (and an adjusted value B+ resistor to compensate for the higher efficiency & higher raw B+ from the diodes vs. the seleniums). If they're leaking, they'd overload the B+ resistor and/or blow the a fuse.
Charles
