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4-2. To Replace the Memory Back Up Battery
* Before replacing the memory backup battery, switch on the unit and check to see if the "Low
battery!" message appears on the display. If it does, replace the main power supply batteries
before replacing the back up power supply battery.
* Never remove the main power supply and the memory back up batteries from the unit at the same
time.
* Be sure to switch the unit off before replacing batteries. Replacing batteries with power on will
cause data in memory to be deleted.
* Be sure to replace the back up power supply battery at least once 2 years, regardless of how
much you use the unit during that time. Failure to do so can cause data in memory to be deleted.
1
Switch the power of the calculator off.
2
Remove screw
B
on the back of the calculator, and remove
the back-up battery compartment cover.
3
Remove the old battery.
4
Wipe off the surfaces of a new battery with a soft, dry cloth.
Load it into the calculator so that its positive
+
side is
facing up.
5
Insert the tabs of the back-up battery compartment cover
into the slots in the back of the calculator and replace the
cover. Secure it in place with the screw.
6
Switch the power of the calculator on and check for proper
operation.
Screw
B
5. RESET OPERATION
Warning!
The procedure described here clears all memory contents. Never perform this operation unless you
want to totally clear the memory of the calculator.
You should perform the RESET operation whenever you want to initialize the calculator. If you need
the data currently stored in memory, be sure to write it down somewhere before performing the
RESET operation.
• To reset the calculator
1
Switch the power of the calculator on.
2
Press
MENU
to display the Main Menu.
3
Use the cursor keys to select the OPTION icon and
then press
EXE
. Or you can simply press
In
c
while
the Main Menu is displayed.
OPTION
TO SELECT: [
↓
][
↑
]
TO SET : [EXE]
COLOR CONTRAST
RESET
