Frequency Scanning); Backup Battery - Icom IC-28H Instruction Manual

5-6 MICROPHONE
1—5)
РТТ
SWITCH
SCAN
SWITCH
NOTE: When scanning, the
SCAN SWITCH must
remain ON at alt times. _
5-7 BACKUP BATTERY
NOTE: Battery replacement
should be done by your
nearest ICOM authorized
dealer or ICOM service
center.
5-8 RESETTING INTERNAL
MICROCOMPUTER (CPU)
NOTE: After resetting the CPU,
all memory channels must
be re-programmed.
PTT SWITCH: ;
Push this switch to turn the transmitter ON and OFF.
UP SWITCH and DN (down) SWITCH:
In the VFO mode, pushing either of these switches changes the
operating frequency in the direction indicated on the switch by one
step. Holding either switch down starts the frequency scan
(SECTION 5-3 FREQUENCY SCANNING).
SCAN SWITCH: E"
eOFF: The UP SWITCH and DN SWITCH on the microphone are
disabled to eliminate the chance of accidental frequency or |
memory channel changes.
eON: The SCAN SWITCH must be ON for the UP SWITCH and
DN SWITCH to function as described above.
The 1С-28Н contains a lithium battery as a backup for the internal
microcomputer memory in the transceiver for times when the
external power source is removed or interrupted.
The lithium bat-
tery is a reliable backup device which has been proven to last for
more than five years under actual operating conditions.
After using the 1С-28Н for five years, monitor the transceiver
1) Turn ON the power to the IC-28H.
2) Locate the RESET HOLE in the bottom cover of the transceiver.
3) Insert a non-metallic probe through the hole and push the RESET
SWITCH.
eO ee