Icom IC-2SA Instruction Manual page 22

6 MAINTENANCE
6-2 Backup battery
The transceiver is equipped with a rechargeable lithium
backup
battery for retaining
memory information.
The
backup
battery is automatically
charged
when a battery
pack is connected.
Backup battery replacement is therefore
not necessary every 5 years.
6-3 Cleaning
If the transceiver becomes dusty or dirty, wipe it clean with
a dry, soft cloth.
6-4 Resetting the CPU
When the function display displays erroneous information,
the CPU should be reset before sending the transceiver to
an Icom Dealer or Service Center.
1) Turn power OFF.
2) While pushing [LIGHT] and [MONITOR], turn power
ON.
3) The CPU is initialized, then the following frequency
appears:
©146.01 MHz _ U.S.A., Asia versions
145.00 MHz Europe, Italy and Australia versions