Sharp LC-20S5H Service Manual page 22

LC-20S5H/M/X
Sound only mode function specifications
1 Behavior of the remote control BACKLIGHT button.
BACKLIGHT [BRIGHT]→BACKLIGHT [NORMAL]→
BACKLIGHT [DARK]→BACKLIGHT [AUTO]→BACKLIGHT [OFF]→BACKLIGHT [BRIGHT]
(The "OFF" setting is added while the remote control BACKLIGHT button is effective.
With "YES" selected in "SOUND ONLY MODE".)
2 When the "OFF" mode is selected, the screen becomes mute, the following message appears and the time is
counted down. (Sound only mode setup process)
The time indication "IN 5 SEC" appearing in the message gets counted down.
IN 5 SEC → IN 4 SEC → IN 3 SEC → IN 2 SEC → IN 1 SEC
When the 5 seconds have passed, the backlight error detect function becomes off, the backlight turns off and
the message disappears. (Sound only mode process)
BACKLIGHT [OFF] TURNS OFF IN 5 SECS
At a temporary reset, the count-down does not take place and the following message appears.
(In this case too, the backlight error detect function becomes off, the backlight turns off and the message
disappears in 5 seconds.)
BACKLIGHT [OFF] PRESS BACKLIGHT TO CANCEL
3 The key functions in the sound only mode setup process and sound only mode process are referred to in
"Table of Key Allocation in Sound Only Mode" and "Table of Key Functions in Sound Only Mode"
4 To turn off the power with the power key, off-timer or no-signal power supply in the sound only mode, first end
the sound only mode, then call the BACKLIGHT mode, and finally turn off the power.
5 Let's suppose that the power is on and the BACKLIGHT mode is off. In this case, call the BACKLIGHT mode
first and then get started.
6 If the BACKLIGHT mode is turned off with the sound mute, the sound only mode setup process (caution
displayed) goes on with no sound. Once the sound only mode is set up, the sound mute gets cleared (just
when the backlight turns off). The sound volume level at this clearing will be the same as before the sound
mute action.
7 To activate the V-CHIP block, make a temporary reset and keep on the caution display until the block is
unlocked. The screen background will be black, not blue.
8 The closed caption is ignored (including the temporary reset).
Screen mute
Screen mute
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