Epson Expression 1640XL Manual page 20

Connecting the scanner
To connect the scanner to your computer or USB hub:
1.
Connect one end of the cable (Type B) to the USB port on the back of the scanner.
2.
Connect the other end of the cable (Type A) to the USB port on your computer, or
USB hub.
Note:
USB cables enable you to connect the scanner whether your computer is on or
off. If you connect the scanner while your computer is on, the "Add New
Hardware Wizard" dialog box (Windows) or a message telling you that the
scanner driver needs to be installed (Macintosh) will appear. When this
happens, follow the instructions in Chapter 3 in the online Setup Guide, then
install the software.
Connect the USB cable to your computer, then install or start the scanner
software. Do not connect or disconnect the USB cable while the scanner
software is open.
Make sure no other interface is used.
20
Connecting the Scanner to Your Computer