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Power Supply Appendix B
Keep batteries out of the reach of small children. If swallowed, consult with a
physician immediately.
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uTo 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.
* 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 four batteries with new ones.
1. Press !O to turn the calculator off.
Warning!
* Be sure to switch the unit off before replacing batteries. Replacing batteries
with power on will cause data in memory to be deleted.
2. Making sure that you do not accidently press the o key, slide the case onto the
calculator and then turn the calculator over.
3. Remove the back cover from the calculator by press-
ing it in the direction indicated by arrow 1, and then
sliding it in the direction indicated by arrow 2.
4. Remove the four old batteries.
5. Load a new set of four batteries, making sure that their
positive (+) and negative (–) ends are facing in the
proper directions.
6. Replace the back cover.
7. Turn the calculator front side up and slide off its case.
Next, press o to turn on power.
• Power supplied by memory back up battery while the main power supply batter-
ies are removed for replacement retains memory contents.
• Do not leave the unit without main power supply batteries loaded for long peri-
ods. 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.
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