C. Resetting the Unit

A strong impact, exposure to an electrical field, or other unusual conditions may render the unit inoperative, and pressing the keys or touch buttons will have no effect. If this occurs, you will have to press the RESET switch on the back of the unit using the touch pen or similar object to be able to continue to use the unit.

perative may erase

some or all of the data stored in memory.

Do not use anything breakable, anything with a sharp tip or anything that might break to press the RESET switch.

All reset If the unit still fails to function after it has been reset using o p e r a t i on the procedure above, or you have forgotten the password

to be entered in the start-up display, you will have to reset it using a slightly more complicated procedure:

1.While pressing and holding (ON), press and release the RESET switch.

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Sharp IQ-8900, IQ-8920 manual Resetting the Unit