Canon 4.1 User Manual page 64

Problem: Scanning quality is poor
Solution 1: Resolution is too low. Raise it and rescan.
Solution 2: Original is floating off the document glass (platen). Place the original
correctly on the document glass.
Solution 3: Document glass or underside of the document cover is dirty. Clean
them.
Problem: Smudges are appearing on glossy color photo scans
Solution: Photos are adhering to the document glass are causing the light to
refract, creating the striped patterns. Shift the photo to a different
position on the document glass or clean the document glass before
rescanning.
Problem: Coloring of the preview image and the printed image is
different
Solution 1: Insufficient printer toner (ink). Replenish or replace the toner. (printer
manual)
Solution 2: Color balance or gamma value setting in the printer driver doesn't
match the printer. Manually adjust the settings in the printer driver.
(printer manual)
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