Sony RM-VL900 Operating Instructions (primary manual) - Page 22

Controlling the Volume of Visual Components Connected to an Audio System (continued) 1 Press S (set). All Component Select buttons flash. To set only the audio components' volume controls to AMP Press VOL- while holding MUTING pressed. Only the audio Component buttons light up when you press these buttons, and then turn off when you release them. 2 While holding MUTING pressed, press VOL + or VOL -. To set all volume controls to AMP Press VOL+ while holding MUTING pressed. All Component Select buttons light up when you press these buttons, and then turn off when you release them. Visual components are: TV, VCR, CBL/SAT, DVD Audio components are: CD, MD, TAPE, AMP 22