Fujitsu fi-6140 Operator's Manual page 212

8.12 Power ON/OFF Control Setting
3. To power on/off the scanner by pressing the Power button, select [Enable power switch]. To
power on/off the scanner by connecting/disconnecting the AC cable, select [Disable power
switch].
To power on/off the scanner in conjunction with the computer, select [Enable USB power feeding].
If [Enable USB power feeding] is selected while the scanner is connected through an SCSI cable,
the scanner operation will be the same as when [Enable power switch] is selected.
ATTENTION
Some computer or USB hub models continue supplying power to the USB bus even after
they are turned off.
In such a situation, the option [Enable USB power feeding] may not function properly.
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