Casio CFX-9970G, Service Manual

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2-3. Power Supply

This unit is powered by four AAA-size (LR03(AM4) or R03(UM-4)) batteries. In addition, it uses a single
CR2032 lithium battery as a back up power supply for the memory.

If the following message appears on the display, immediately stop using the calculator and replace batteries.

If you try to continue using the calculator, it will automatically turn power off, in order to protect memory
contents. You will not be able to turn power back on until you replace batteries.

Be sure to replace the main batteries at least once every two years, no matter how much you use the calculator
during that time.

• To adjust the color contrast

1. Use the cursor

and

keys to move the pointer so it is next to CONTRAST.

2. Press the 

 cursor key to make the display darker and the 

 cursor key to make it lighter. Holding

down either key changes the setting at high speed.

• To adjust the color tint

1. Use the cursor

and

keys to move the pointer so it is next to the color (ORANGE, BLUE, GREEN)

whose tint you want to adjust.

2. Press the

cursor key to give the color greener tint and the

cursor key to give it an orange tint. Holding

down either key changes the setting at high speed.

• To exit the color adjustment screen

Press

MENU

to return to the Main Menu.

• It is recommended that you always adjust the CONTRAST setting first, and then adjust the tint settings

for individual colors.

• You can change the CONTRAST setting at any time without displaying the color adjustment screen.

Simply press

SHIFT

and then

or

to change the setting. Press

SHIFT

once again after get the display

looking the way you want.

Warning!
If you remove both the main power supply and the memory back up batteries at the same time, all memory
contents will be erased. If you do remove both batteries, correctly reload them and then perform the reset
operation.

Replacing Batteries

Precautions:
Incorrectly using batteries can cause them to burst or leak, possibly damaging the interior of the unit. Note the
following precautions: