To Replace The Main Power Supply Batteries - Casio CFX-9800G Service Manual & Parts List

Precautions:
Incorrectly using batteries can cause them to burst or leak, possibly damaging the interior of the
unit. Note the following precautions:
• Be sure that the positive + and negative - poles of each battery are facing in the proper direc-
tions.
• Never mix batteries of different types.
• Never mix old batteries and new ones.
• Never leave dead batteries in the battery compartment.
• Remove the batteries if you do not plan to use the unit for long periods.
• Never try to recharge the batteries supplied with the unit.
• Do not expose batteries to direct heat, let them become shorted, or try to take them apart.

4-1. To Replace the Main Power Supply Batteries

* 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 switch 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 batter-
ies 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.
1 Switch the power of the calculator off, and slide the calcula-
tor into its hard case.
2 Remove screw A on the back of the calculator, and remove
the main battery compartment cover.
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 Insert the tabs of the main battery compartment cover into
the slots in the back of the calculator and replace the cover.
Secure it in place with the screw.
• Power will not switch on if you press
power supply battery compartment cover is open.
6 Remove the calculator from its hard case and press
switch power on.
• Power supplied by memory back-up batteries while the
main power supply batteries are removed retains memory
contents.
• Do not leave the unit without main power supply batteries
loaded for long periods. Doing so can cause deletion of data
stored in memory.
while the main
ON
AC/
to
AC/ ON
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Screw A