Recently got an old Pioneer RX-711 on the cheap. Seems like most everything is working on it. Needs a good dusting on the inside, though. Issue I'm having is that I'm not finding much info on it. No service manuals, no user manuals, no parts, no accessories, no info. Only thing I do know is that it was made to work with a Pioneer PL-211AZ turntable. Does anyone know anything more about it?