Preventing Connection to Computer via USB Port
You can disable the USB port for computer connection on the back of the machine to reduce the risk of an external connection without going through a network with security measures.
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This section describes how to configure the settings using Remote UI from a computer.
On the control panel, select [Menu] in the [Home] screen, and then select [Preferences] to configure the settings. [USB Settings]
Administrator privileges are required. The machine must be restarted to apply the settings.
On the control panel, select [Menu] in the [Home] screen, and then select [Preferences] to configure the settings. [USB Settings]
Administrator privileges are required. The machine must be restarted to apply the settings.
1
Log in to Remote UI in System Manager Mode. Starting Remote UI
2
On the Portal page of Remote UI, click [Settings/Registration]. Portal Page of Remote UI
3
Click [External Interface Settings] 
[Edit].
[Edit].The [Edit External Interface Settings] screen is displayed.
4
Clear the [Use as USB Device] checkbox, and click [OK].
5
Restart the machine. Restarting the Machine
The settings are applied.
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Administrator privileges are required. The machine must be restarted to apply the settings.
1
On the control panel, press [Menu] in the [Home] screen. [Home] Screen
2
Press [Preferences] [External Interface] [USB Settings] [Use as USB Device]
[External Interface] [USB Settings] [Use as USB Device]The [Use as USB Device] screen is displayed.
If the login screen appears, enter the System Manager ID and PIN, and then press [Log In]. Logging In to the Machine
3
Press [Off].
4
Restart the machine. Restarting the Machine
The settings are applied.