Avision AV121 (FF-0506/FF-0508/FF-0608S) - Manual (Page 14)

2.3 Connecting the Cables
Make sure the power of scanner is off.
2.3.1 Connecting to Power
Plug the small end of the power adaptor into the power jack of
your scanner. Insert the other end to an appropriate power
outlet.
Power Cable
2.3.2 Turning on the Power
After the power cable and the USB cable have all connected,
press the power switch to the “I” position to turn on the
scanner. To turn off the scanner, please press the power
switch to the “O” position.
Power Switch
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