To replace the memory back up battery 1 Switch the power of the calculator off. 2 Slide the battery compartment cover on the back of the unit in the direction indicated by the arrow. 3 Remove screw B from the battery holder. 4 Remove the old battery. 5 Wipe off the surfaces of a new battery with a soft, dry cloth. Load it into the calculator so that its positive + side is facing up. 6 Replace the battery holder and fasten it in place with screw B. 7 Replace the battery compartment cover, sliding in the direction opposite that indicated by the arrow. 8 Switch the power of the calculator on and check for proper operation. Battery holder Screw B
[Important] * Do not remove the main power supply and the memory back up batteries from the unit at the same time. * If you should remove the main power supply and the memory back up batteries, you must then perform the all reset operation after you reload batteries. * Replace the memory back up battery at least once every year, regardless of how much you use the calculator during that time.
s About the Auto Power Off Function The calculator switches power off automatically if you do not perform any key operation for about 6 minutes. To restore power, press AC/ON on.
