Rotel RSP-1570 Program Memory

Hello... I have a memory retention issue with this unit. It will not retain the programing from the previous set-up.
The unit is always in the Standby mode. Once the the programing is reset, the unit works fine until it is placed into Standby.
I am having a hard time locating a service manual with schematics (Even from Rotel).
I'm hoping there might be an issue with a backup memory cap. or battery. (Standby power supply?)
I searched thru a RSP-1068 manual for the likes but could not find anything (usually 5.5 or 3.3V).

Any help will be appreciated.

Thanks, Bill