![background image](http://html.mh-extra.com/html/icom/ic-m31/ic-m31_instruction-manual_612756017.webp)
12
4
BASIC OPERATION
New2001
■
Lock function
This function electronically locks all keys (except for [
+
]/[
–
],
[PTT], [SQL•
MONI
] and [H/L
•LOCK
]) to prevent accidental
channel changes and function access.
➥
Push [H/L•LOCK] for 1 sec. to turn the lock function ON
and OFF.
■
Automatic backlighting
This function is convenient for nighttime operation. The auto-
matic backlighting can be activated in SET mode. (p. 18)
➥
Push any key except for [PTT] to turn the backlighting ON.
• The backlighting is automatically turned OFF after 5 sec. of in-
activity.
■
Monitor function
The monitor function releases the noise squelch mute. See
p. 18 for details of the monitor switch action.
➥
Push [SQL•
MONI
] for 1 sec. to activate the monitor func-
tion.
• “
” blinks and audio is emitted.
MONI
Push
for 1 sec.
Blinks while the monitor
function is used.
LOCK
Push
for 1 sec.
Appears while the
lock function is used.
4
IC-M31.qxd 03.10.20 9:18 AM Page 12 (1,1)