Canon CR-190i ユーザーズマニュアル

If there is a problem with the scanned image (the image is not sharp or 
stripes appear), one of the following conditions may be a probable 
cause. Check the following conditions, and take the appropriate action.

If the scanning glass or rollers are dirty, the dirt will appear on the 
scanned image.

Clean the scanning glass and rollers. For details, see “Cleaning 

If the scan conditions are inappropriate, the scanned image will not 
be sharp or will appear as dark.

Check the brightness and other scanner settings.

If the scanned image is blurry or the document has not been 
scanned at all, the brightness may be set too high.
If the scanned image appears dark, the brightness may be set too 
low. 
Also, check the settings on the driver and the software application.

If the document cannot be scanned correctly even if the scan 
conditions are adjusted, the driver or the application may not be 
functioning correctly.

Reinstall the driver or application. 

For details on how to install the driver, see “Installing the Software,” 
on p. 19. 
For details on how to install the application, see the applications 
instruction manual.

Even if the computer may be recognizing the scanner correctly, and 
the driver and the application is installed correctly, scanning may 
not be performed correctly. If this happens, the interface card is not 
compatible. Use the recommended interface card.

If the above remedies do not rectify the problem, contact your local 
authorized Canon dealer or service representative to have the scanner 
serviced.