![background image](http://html.mh-extra.com/html/icom/ic-m21/ic-m21_instruction-manual_612740020.webp)
D
Self check function
“SC”
The self check function checks transceiver conditions by it-
self, and informs you in case a problem is found. The follow-
ing items are checked after the power is turned ON, then it
switches to operation mode.
• Temperature (Outside of –15°C to +55°C)
• Connected battery voltage
• Water intrusion
When error messages as shown below are displayed, see
trouble shooting for advice (p. 23).
15
6
SET MODE
D
LCD contrast selection
“LC”
The contrast of the LCD can be adjusted from 4 levels.
• 1 (low contrast) – 4 (high contrast); 3 (default)
D
Auto power save function
“PS”
The power save function reduces current drain by deactivat-
ing the receiver circuit for preset intervals.
LCD contrast (default)
Self check OFF (default)
Error messages
Temperature error
Battery voltage error
Water intrusion error
Auto power save ON (default)