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. 6-5)

The Scanner Is Not Recognized (Connecting via USB) (See p. 6-5)

The Scanner Is Not Recognized (Connecting via SCSI) (See p. 6-6)

Scanning Is Not Performed (See p. 6-6)

Slow Scanning Speed (See p. 6-6)

Documents Do Not Feed Properly (See p. 6-7)

Saved Image Files Do Not Open (See p. 6-7)

Scanning Results Are Not as Expected (See p. 6-7)

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.

 

 

6-5