hifi engine

Mid 70s Accuphase P300 "Service Manual"

I am in need of a copy of the Service Manual for the Accuphase P300 amp. I could only find the block diagram/schematic in the library here is there anyone with a copy that can share. I cant find it anywhere on line. I also contacted Accuphase directly to acquire a copy but haven't received a response. Need help thanks.