Epson 1680 Manual page 20

Note:
Do not connect or disconnect USB cables when the scanner is in use.
The connectors at each end of USB cables are different. The end that connects to your
computer has a "Type A" connector, shown below:
The end that connects to your scanner has a "Type B" connector, shown below:
USB hubs
You can also use a USB hub, allowing you to increase the number of USB ports and
therefore connect several devices to your computer at the same time.
Note:
If you connect your scanner through more than one hub, your system may not work
properly. In this case, try connecting the scanner directly to the computer's USB port.
Also, your system may not work properly if you use a USB cable other than that supplied
by EPSON.
Connecting the scanner
Follow these steps to connect the scanner to your computer or USB hub.
Note for Windows 98 users:
If you want to connect the scanner to a different USB port on your computer or hub
after installing the scanner software, you must uninstall the scanner software before
switching ports, then reinstall the software once the scanner is connected to the new
port. Follow the instructions in "When changing the USB port in Windows 98" in your
online Setup Guide.
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