Does anyone out there have any info on how this system works? All i can find is schematics for this model, they might as well be in chinese because i have know idea what all the buttons do on this model. I got this receiver for free from previous owner and he told me nothing had ever been replaced, mint condition. Sounds great but not sure how to operate to full potential, i need a user guide which probaly came with the unit. Please help bring this giant to full potential.