When "Battery Alarm!" Appears - Furuno GP-31 Operator's Manual

6. After the equipment has checked the
items shown in Figure 8-4, a beep
sounds and the message PUSH KEY
appears at the top right-hand corner.
7. Press each key one by one. The name
of the key pressed momentarily appears
at the top right-hand corner if the key is
functioning properly.
Note: If no key is pressed within approx.
five seconds, the equipment automati-
cally proceeds to step 8.
8. The equipment displays the following
message to inform you that it is now go-
ing to check the LCD:
Figure 8-5 LCD CHECK screen
9. The LCD is checked as shown in the
message in Figure 8-5. Then, the test
repeats. To stop the test, turn off the
power.
8.5 When "BATTERY ALARM!"
Appears
A lithium battery (type: TZ6580553A, code
no.: 000-139-951) is installed on the circuit
board inside the display unit, and it pre-
serves data when the power is turned off.
The life of the battery is about 3-5 years.
When its voltage is low "BATTERY
ALARM!" appears on the display to alert
you. When this happens, do the following
to prevent loss of data, and contact your
dealer to request replacement of the bat-
tery.
1. Press the [MENU] key once or twice to
open the menu.
2 Select SYS SETUP and press the [ENT]
key.
Figure 8-6 SYSTEM SETUP menu
3. Select "EXCHANGE BATTERY?" and
press the [ENT] key. The display shows
the following:
Figure 8-7 Exchange battery window
4. Press the [ENT] key. Then, the follow-
ing display appears.
Figure 8-8 Battery exchange
confirmation window
5. Press any key to automatically turn off
the unit.
Then, important items in the RAM area are
transferred to a temporary area in the flash
memory to prevent loss of data.
Note : When it is expected that the
GP-31/36 will not be used for a long time,
execute the above procedure before
turning the power off,to prevent loss of data.
8-3