Sharp EL-2901RH Manual De Instrucciones página 11

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IN CASE OF ABNORMAL CONDITIONS
When this unit is exposed to strong RF noise and/
or extreme physical shock during the operation, or
when the power cord is plugged into the AC outlet,
the unit may start functioning abnormally which, in
some rare occasion all keys - including the power
key and the key - cease to respond.
If such abnormal conditions are observed, unplug
the AC cord from the socket. Keep the unit