Casio FX-7400G User Manual page 176

(Should a battery leak, clean out the battery compartment of the unit immedi-
ately, taking care to avoid letting the battery fluid come into direct contact with
your skin.)
Keep batteries out of the reach of small children. If swallowed, consult with a
physician immediately.
u u u u u 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 cal-
culator or not loaded correctly. Doing so can cause memory data to be deleted
and malfunction of the calculator. If mishandling of batteries causes such prob-
lems, correctly load batteries and then perform the RESET operation to resume
normal operation.
* Be sure to replace all two batteries with new ones.
1. Press !O 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 o 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 o while
the main power supply battery compartment
cover is open.
• Do not leave the unit without main power sup-
ply batteries loaded for long periods. Doing so
can cause deletion of data stored in memory.
P.11
• If the figures on the display appear too light and hard to see after you turn on
power, adjust the contrast.
Appendix
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