I don't think that it exists a printed Reference Manual version, and if it exists, I don't think it is included in a certain country Genos Pack Accessories .
According to Owners Manual (pag. 9):
Included Accessories
• Owner’s Manual (this book)
• Online Member Product Registration
• AC Power Cord
• Music Rest, two Music Rest Brackets
I think if you want a printed version of Reference Manual, you have to order directly at Yamaha (Europe or USA, Canada, where are you from...), or to your Genos provider.
Regards.