Panasonic CQ-DX200W5 Operating Instructions Manual page 15

Volume off (down)
(only by remote control unit)
Press [MUTE].
Cancel
Press [MUTE] again.
Note: The volume-down range can be specified.
(a page 35)
When the power of the unit is set to OFF, press [DISP]
(ACC ON).
(Clock time) (Default)
(Display off)
When the power is set to ON, refer to the description for
each source mode.
CQ-DX200W
15