Why not just plug the AVR's left and right channel line level outputs into an unused pair of line level (non-phono) inputs on the RA-1062? Then determine a setting of the RA-1062's volume control that allows you to use the AVR's volume control at reasonable settings for movies, and return the RA-1062's volume control to that setting each time you watch a movie.
Regards,
-- Al
Regards,
-- Al