Icom IC-M90 Instruction Manual page 25

D LCD contrast selection "LC"
The contrast of the LCD can be adjusted from 4 levels.
• 1 (bright)–4 (dark); 3 (default)
Push
default
D Auto power save function "PS"
The auto power save function reduces current drain by deac-
tivating the receiver circuit for preset intervals.
• ON : The power save function is turned ON. The power save func-
tion will activate when no signal is received, and no operation
is performed for 5 sec.
• OFF: The power save function is turned OFF.
Push
Power save ON (default)
bright
Power save OFF
D Self check function "SC"
The self check function checks the transceiver conditions by
itself, and informs you in case a problem is found. Self check
automatically and quickly runs through its diagnostic steps
each time the radio is turned ON. Afterwards, the radio
switches to normal operation mode.
• Temperature : Outside of –35°C to +73°C; –31°F to +163°F
(approx.)
• Connected battery voltage
Self check OFF (default)
When error messages as shown below are displayed, see
troubleshooting for advice. (p. 28)
Temperature error
SET MODE
Push
Self check ON
Battery voltage error
8
8
19