3. Use a clean dry cloth to wipe dirt off the sensor glass. Wipe both the top and bottom sensor glasses.
IMPORTANT
Scratches on the sensor glass may cause marks on the images and could cause feeding errors. If there are scratches on the sensor glass, contact your local authorized Canon dealer or service representative.
4. Wipe the rollers with a firmly wrung cloth moistened with water.
Guide Boards
IMPORTANT
•Do not use detergent to clean the rollers, since any detergent on the rollers could cause a feeding error.
•If you cannot freely rotate the rollers, do not force them to rotate. Just clean the part that you can see. Forcing the rollers to rotate may cause a feeding error.
•Be careful not to bend the guide boards that are against the rollers on the upper unit.
5.Remove the pickup roller, feed roller, and retard roller.
-See “Removing the Pickup Roller,” on p. 114.
104Chapter 4