Fujitsu PA03360-B525 Operator's Manual page 46

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To turn on/off the ScanSnap, press the [POWER] button for longer than one
second.
* To prevent unintended operation, the [POWER] button does not work unless
it is pressed for longer than one second.
The ScanSnap is turned on/off when:
•
the paper chute on the ScanSnap is opened/closed.
•
the personal computer connected to the ScanSnap is turned on/off.
•
the [POWER] button on the scanner is pressed (with the paper chute open).
However, power on/off of the ScanSnap is controlled by opening and closing the
paper chute, and therefore, the ScanSnap will not be turned on unless the
paper chute is open, even if the personal computer is turned on.
Leave the ScanSnap connected to the personal computer, and you can turn on/
off the ScanSnap simply by opening/closing the paper chute when necessary.