Troubleshooting

Common Problems and Solutions

This section provides recommended solutions to common problems. If you have a problem that is not solved by the following, contact your local authorized Canon dealer.

Problem 1

The scanner does not turn ON.

Solutions

(1)

The scanner remains OFF while the feed tray is

 

 

closed. When you open the feed tray, the scanner

 

 

turns ON automatically.

 

(2)

If the scanner is connected to the computer via a

 

 

USB hub, try removing the hub and connecting

 

 

directly to the computer.

Problem 2

The scanner is not recognized.

Solutions

(1)

Confirm that the scanner is properly connected to

 

 

the computer with a USB cable.

 

(2)

Confirm that the scanner is turned on. See the

 

 

previous “Problem 1” if the scanner does not turn

 

 

on.

 

(3)

The computer’s USB interface may not support the

 

 

scanner. The scanner cannot be guaranteed to

 

 

work with all USB interfaces.

 

(4)

Confirm that the supplied USB cable is used to

 

 

connect the scanner to the computer. The scanner

 

 

cannot be guaranteed to work with all available

 

 

USB cables.

 

(5)

If the scanner is connected to the computer via a

 

 

USB hub, try removing the hub and connecting

 

 

directly to the computer.

 

(6)

When the Auto Start switch on the scanner is set

 

 

to ON, you can only scan with the built-in

 

 

application, CaptureOnTouch Lite. In this case,

 

 

scanning from applications on the computer is

 

 

disabled.

 

(7)

When the scanner is operated with Windows and

 

 

if “?”, “!”, or “x” icons appear for the scanner in

 

 

Device Manager, delete the scanner in Device

 

 

Manager and reinstall the scanner driver.

Problem 3

Documents feed askew (scanned images are

 

slanted).

Solutions

(1)

Align the document guides to fit the documents as

 

 

closely as possible, and load the documents so

 

 

that they feed straightly.

 

(2)

Enable [Automatically straightens skewed images]

 

 

(or [Deskew]) in the scanner driver settings.

 

(3)

If many pages have been scanned since the last

 

 

roller cleaning, clean the rollers and separation

 

 

pad. If documents still feed askew, roller

 

 

replacement or other maintenance may be

 

 

needed. (See p. 98.)

 

(4)

Confirm that the separation pad is attached

 

 

securely.

 

(5)

Perfectly straight scanning may not be possible for

 

 

the document due to the structural design of the

 

 

scanner.

Problem 4

CaptureOnTouch Lite does not start.

Solutions

(1)

If the Auto Start switch on the scanner is set to

 

 

OFF, the built-in application, CaptureOnTouch

 

 

Lite, does not start. Close the feed tray to turn OFF

 

 

the scanner, and set the Auto Start switch to ON.

 

(2)

If access to USB devices is blocked by security

 

 

software, you may not be able to use

 

 

CaptureOnTouch Lite.

Problem 5

The auto play screen appears when the scanner is

 

connected, but you cannot scan with

 

CaptureOnTouch.

Solutions

When the Auto Start switch on the scanner is set to

 

ON, you can only scan with the built-in application,

CaptureOnTouch Lite. Close the feed tray to turn OFF the scanner, and set the Auto Start switch to OFF.

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