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Chapter 5 Troubleshooting
When the Scanner Is Not
Recognized
The following causes and remedies describe why your computer may not
recognize the scanner.
Cause The Scanning Utility is not installed.
Remedy Install the Scanning Utility before connecting the scanner to the
computer. (See “Setting Up the scanner,” on p.16.)
Cause The scanner is not correctly connected to the computer.
Remedy Connect the scanner to the computer correctly. (See “Connecting the
Scanner to a Computer,” on p.23.)
Cause The scanner is turned off.
Remedy Turn on the scanner. However, if you are using SCSI connections, turn
off the computer and then turn on the scanner and then turn the
computer back on. (See “Turning ON and OFF the Power,” on p.26.)
Cause The USB interface provided as standard with your computer is
not compatible with the scanner (Connecting via USB).
Remedy Not all USB interfaces provided as standard with personal computers
are guaranteed. Contact your local authorized Canon dealer for more
detailed information. (See “Checking Your Operating Environment” on
p.17.)
Cause USB cable is not compatible with the scanner (Connecting via
USB).
Remedy Use the USB cable provided with the scanner. (See “Checking Your
Operating Environment,” on p.17.)
Cause USB hub is not compatible with the scanner (Connecting via
USB).
Remedy Remove the USB hub to use the scanner. (See “Checking Your
Operating Environment,” on p.17.)
Cause The SCSI card is not compatible with the scanner (Connecting via
SCSI).
Remedy Use a recommended SCSI card. (See “Checking Your Operating
Environment” on p.17.)