CASIO FX-7400G
Manual de Servicio

3. REPLACING BATTERIES
� To replace the main power supply batteries
1 Press
SHIFT OFF

to turn the calculator off.

2 Push the battery compartment cover on the back of the calculator in the direction noted in the illustration and remove it. 3 Remove the two old batteries. 4 Load a new set of two batteries, making sure that their positive + and negative - ends are facing in the proper directions. 5 Replace the battery compartment cover and press AC/ to turn power on. The memory back-up battery provides power to the memory while the main batteries are removed, so memory data is not lost . � Power will not switch on if you press AC/ while the main power supply battery compartment cover is open.
ON ON

� Do not leave the unit without main power supply batteries loaded for long periods. Doing so can cause deletion of data stored in memory. � If the figures on the display appear too light and hard to see after you turn on power, adjust the contrast using the following procedure. 1. Press MENU . 2. Use the cursor keys ( , , , ) to select the CONT icon and press EXE or simply press 7 to display the contrast adjustment screen. 3. Press to make the figure on the screen lighter or to make them darker. 4. After getting the contrast the way you want it, press MENU to return to the main menu. REMARK * 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. * Never replace the main power supply battery compartment cover or turn the calculator on while the main power supply batteries are removed from the calculator or not loaded correctly. Doing so can cause memory data to be deleted and malfunction of the calculator. If mishandling of batteries causes such problems, correctly load batteries and then perform the RESET operation to resume normal operation. * Be sure to replace all two batteries with new ones.

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