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8. MAINTENANCE & TROUBLESHOOTING
48
8.3 Replacing the Fuse
The fuses (1A) in the power cable (+/- lines)
protects the equipment from overcurrent,
reverse polarity of the power source and
equipment fault. If the fuse blows, find the
cause before replacing the fuse. If the fuse
blows again after replacement, request
service.
WARNING
Use the proper fuse.
Use of a wrong fuse can result in damage
to the equipment.
8.4 Replacing the Battery
A lithium battery (type: CR2354-1F2, code
no.: 000-142-305) on the circuit board inside
the display unit preserves data when the
power is turned off. The life of the battery is
3-5 years. When its voltage is low, the
message shown below appears and data is
transferred from the RAM to the flash
memory.
BATTERY ALARM!
INTERNAL BATTERY
VOLTAGE IS LOW.
REPLACE BATTERY.
PUSH ENTER KEY TO
BACKUP WPTS,
ROUTES & TRACKS.
Low battery voltage warning
When this message appears, all open
windows are closed, no alarm will be
generated and no key input other than the
[ENT] key is accepted. Press the [ENT] key to
back up data and then turn off the power.
Contact your dealer to request replacement
of the battery. Below is the procedure for
replacing the battery.
1. Turn on the power and then press the
[MENU] key once or twice to open the
menu.
2 Choose SYS SETUP and then press the
[ENT] key.
SYSTEM SETUP
LANGUAGE : ENGLISH
DATUM : WGS84
UNITS : nm, kt
TIME DIFF : +00 : 00
TIME DISP : 24HOUR
TEST?
SIMULATOR?
EXCHANGE BATTERY?
SYSTEM SETUP menu
3. Choose “EXCHANGE BATTERY?” and
then press the [ENT] key. The display
shows the following message.
ARE YOU SURE?
YES NO
EXCHANGE
BATTERY?
Exchange battery prompt
4. Press ◄ to choose YES and then press
the [ENT] key. The following display
appears.
READY FOR
BATTERY CHANGE.
PRESS ANY KEY
TO SHUT DOWN.
Battery exchange
confirmation window
5. Press any key to automatically turn off the
unit.
6. Replace the battery.
Note 1: When it is expected that the
equipment will not be used for a long time,
execute the above procedure before turning
the power off, to prevent loss of data.
Note 2: Data is copied from the flash memory
to the RAM at the next power up.