5.Remove the old battery using the touch pen or a similar object.

6. Insert a new battery with the plus (+) side up.

8.Replace the memory backup battery cover and secure it with the screw.

9.Set the battery replacement switch to “NORMAL OPERATION”.

If nothing happens when you press (ONj :

Setting the battery replacement switch to “REPLACE

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Sharp IQ-8900, IQ-8920 manual If nothing happens when you press ONj, Setting the battery replacement switch to Replace, 305