
Chapter 6 Practical Examples
2. Troubleshooting
This section describes the problems that may occur during use of the scanner and how to solve them.
Trouble Categories
The following trouble categories are addressed:
•The Scanner Does Not Turn ON (See p.
•The Scanner Is Not Recognized (Connecting via USB) (See p.
•The Scanner Is Not Recognized (Connecting via SCSI) (See p.
•Scanning Is Not Performed (See p.
•Slow Scanning Speed (See p.
•Documents Do Not Feed Properly (See p.
•Saved Image Files Do Not Open (See p.
•Scanning Results Are Not as Expected (See p.
It you cannot resolve a problem, contact your local authorized Canon dealer or your service representative.
Problem and Solution
■The Scanner Does Not Turn ON
If the scanner does not turn ON, first confirm the following:
✔Is the power cord connected correctly?
✔Is the power cord inserted into the power outlet?
If this does not solve the problem, consider the following possible problems and causes:
Problem | With Auto USB Power switching is |
| enabled, but the scanner does not turn ON |
| when the computer is turned ON. |
Cause | The SCSI connection is also being used. |
Solution | The SCSI connection does not support Auto |
| USB Power switching. Use only the USB |
| connection if you want to use Auto USB |
| Power switching. |
Cause | Auto USB Power has been disabled |
| ([OFF] is selected in the User Mode). |
Solution | Enable Auto USB Power (select [ON] in the |
| User Mode). |
|
|
■The Scanner Is Not Recognized (Connecting via USB)
If the scanner’s USB connection is not recognized, first confirm the following:
✔Are the scanner and PC connected correctly using the proper cable?
✔Is the scanner’s power switch turned ON?
If this does not solve the problem, consider the following possible causes:
Cause | The scanner does not support your USB |
| interface. |
Solution | This product is not guaranteed to operate with |
| all types of USB interfaces. Contact your local |
| authorized Canon dealer or service |
| representative for more information. |
|
|
Cause | The scanner does not support the USB |
| cable. |
Solution | Use the USB cable provided with the scanner. |
|
|
Cause | The USB hub is not compatible with the |
| scanner. |
Solution | Remove the USB hub. |
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