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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 flatbed will not turn ON.

Solutions

(1) Confirm that the power switch is set correctly.

(2) Confirm that the AC adapter is plugged firmly into a

power outlet.

Problem 2

The flatbed is not recognized.

Solutions

(1) Confirm that the flatbed is properly connected to the

computer with a USB cable.

(2) Confirm that the scanners (both the flatbed and the

connected Canon DR-series scanner) are turned

ON. If the flatbed is turned ON but the Canon

DR-series scanner is turned OFF, the flatbed will not

operate. See Problem 1 if the scanner does not turn

ON.

(3) The computer's USB interface may not support the

flatbed. The flatbed cannot be guaranteed to work

with all USB interfaces.

(4) Confirm that the supplied USB cable is used to

connect the flatbed to the computer. The flatbed

cannot be guaranteed to work with all available USB

cables.

(5) If the flatbed is connected to the computer via a USB

hub, try removing the hub and connecting the flatbed

directly to the computer.

Problem 3

White lines or streaks appear in scanned images.

Solution

Clean the scanning glass. If a sticky substance such as

glue or correction fluid is found, carefully wipe with just

enough pressure to clean the area where the lines

appear. If the problem cannot be solved by cleaning, the

internal glass may be scratched. In this case, contact

your local authorized Canon dealer.

Problem 4

Text is not enhanced in scanned images, even

though text enhancement mode is enabled in the

Canon DR-series scanner's ISIS/TWAIN driver

settings dialog box.

Solution

This flatbed only supports Advanced Text Enhancement

II. If you scan a document using the flatbed with any

other text enhancement mode, a black and white image

will result. However, the other text enhancement modes

will function properly if the document is scanned using

the connected Canon DR-series scanner.

Problem 5

The scanner is recognized by the computer, but

scanning does not start.

Solution

Check the position of the lock switch on the underside of

the flatbed (See p. 12). If the lock switch is set to the

locked position, set it to the unlocked position.

Problem 6

Job functions do not start when the start button is

pressed.

Solution

If another application that uses the flatbed's driver is

running, job function scanning is disabled.