Sharp EL-9900 operation manual Resetting the Calculator, Using the reset switch

Chapter 2: Operating the Graphing Calculator

Resetting the Calculator

Use the reset when a malfunction occurs, to delete all data, or to set all mode values to the default settings. The resetting can be done by either pressing the reset switch located in the battery compartment, or by selecting the reset in the OPTION menu.

Resetting the calculator’s memory will erase all data stored by the user; proceed with caution.

1.Using the reset switch

1.Pull down the notch to open the battery cover located on the back of the calculator.

2.Place the battery cover back until the notch is snapped on.

3.Press O.

The verification window will appear on the screen.

4.Press Cto clear all the stored data. Press Oto cancel resetting. After C is pressed, the calculator's memory will be initialized. Press any key to display the calculation screen.

Note: If the above verification window does not appear, remove the battery cover and gently push the RESET switch with the tip of a ball-point pen or a similar object.

DO NOT use a tip of a pencil or mechanical pencil, a broken lead may cause a damage to the button mecha- nism.

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