Sharp IQ-8900 - Manual (Page 306)

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 :
l
Setting the battery replacement switch to “REPLACE
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