hifi engine

Accuphase P500 service manual Needed please

Hi would anyone here have the service manual for an accuphase P500 amplifier.
Im trying to identify some zener diodes and signal diodes , would there be a similar schamatics that accuphase used for these coloured diodes. Would anyone have a list of diodes that accuphase used around 1985
I'd be very grateful for any help in finding service manual for this amp.
Thanks muchly