Sharp 14B-SC Operation Manual page 16

@ If the button is pressed a second time, the
Off-Timer display will disappear, leaving
only the channel number display. Press the
button a third time, and the channel
number display will also disappear.
ON 4:49
OFF 0:23
On Screen Display
(When both the On-Timer and
Off-Timer are set.)
@ Sound Mute Button ok
When this button is pressed, the sound is
muted and the mute indicator mark " 9X ",
is displayed on the screen. Press the button
again to restore the sound level.
@ Flashback Button
Pressing this button selects the channel
that was tuned immediately before the one
being watched. For example if channels were
selected in the order of Ch2, Ch3, then Ch6,
pressing the button returns tuning to Ch3.
Press the button again to return to Ché6.
@) TV/Video Selector
When you pressed the TV/Video selector, the
set is switched to receive the Audio/Video
signals through the A/V terminals, and "AV"
(Audio/Video indicator) will be displayed for
about 3 seconds in the upper right corner of
the screen. When the TV/Video selector is
pressed again, the set is switched to receive
on-air TV broadcasting, and the channel
programme number will be displayed for
about 3 seconds in the upper right corner of
the screen.