Illumination of panel key
TV/VIDEO
MENU
CH+
CH-
VOL+
VOL-
POWER
Remote control receiving window
Indicator
Menu keystroke of signal source
Menu keystroke of display screen
Increase channel number/Menu item selection
Decrease channel number/Menu item selection
Increase volume/increase item value/open
Decrease volume/Decrease item value/open
Standby power switch
51