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Appendices 123
Chapter 4
3. Troubleshooting
This section describes the possible problems that might occur during use of the
scanner and how to solve them.
The Scanner Does Not Turn ON ......................................P. 123
The Scanner Is Not Recognized
(Connecting via USB) .......................................................P. 123
The PC Does Not Recognize the Scanner
(Connecting via SCSI) ......................................................P. 124
Scanning Is Not Performed..............................................P. 126
Slow Scanning Speed (Connecting via USB).................P. 126
Documents Do Not Feed Properly...................................P. 127
Saved Image Files Do Not Open......................................P. 128
Scanning Results Are Not as Expected..........................P. 129
If, after consulting this section, you still cannot resolve the problem, contact
your local authorized Canon dealer or your service representative.
The Scanner Does Not Turn ON
Check the following if the scanner does not turn on:
• Is the power cord connected correctly?
• Is the power cord inserted into the power outlet?
For details on connecting the power cord, see “Step 4. Connecting the Scanner
to Your PC,” in the Easy Start Guide.
The Scanner Is Not Recognized (Connecting via USB)
The following are possible causes of the PC failing to recognize the scanner.
Check each possible cause.
Problem The scanner is not correctly connected.
Solution Make sure that the scanner and the computer are correctly
connected with the USB cable. (See “Step 4. Connecting the
Scanner to Your PC,” in the Easy Start Guide.)
Problem The scanner power is switched OFF.
Solution Make sure that the scanner is switched ON. If the scanner is OFF,
turn the scanner ON. (See “Step 4. Connecting the Scanner to
Your PC,” in the Easy Start Guide.)