1982 RCA PGR100 Front Projection TV

[Fwdstuck]

Hey guys I picked up a RCA PGR100 front projection tv yesterday. I've been wanting one for a while to hook up my CED player to from the same era. I've been reading that they are a rebranded Hitachi. The picture is looking good so far. But needs work on the sound. The sound is intermediate static depending what's on the screen. You can bearly hear some sound behind the intermediate static with the volume turned all the way up. I'm going try get the sound working before I restore the whole set. Looking for a service manual. Itlooks to have a STK 437 stereo amplifier.