20
USING THE LCD DISPLAY
3.3 Adjusting the Volume
3.4 Locking the OSD Menu
Lock the OSD menu to protect the LCD display from unauthorised users or from accidentally pressing the
keypad.
To lock the OSD, press and hold the keypad buttons listed below for at least 5 seconds or until the
O S D
L O C K O U T
message appears.
When the OSD is locked, all keypad buttons are inactivated.
Type of OSD Lock
Lock Operation
Unlock Operation
Lock all buttons
Touch and hold the
u
,
p
, and
q
buttons for 5 seconds.
Touch and hold the
u
,
p
, and
q
buttons for 5 seconds or until the OSD
menu appears.
Lock all buttons except
the
POWER
button.
Touch and hold the
t
,
p
, and
q
buttons for 5 seconds.
Touch and hold the
t
,
p
, and
q
buttons for 5 seconds or until the OSD
menu appears.
VOLUME
buttons
Adjusting the Volume
1
Touch either the buttons to call out the volume bar.
2
Touch the button to increase volume or the button to decrease
volume.
3.3.1 Muting the Audio
Touch the and the buttons simultaneously to mute or unmute the audio.
