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104 Appendices
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.
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.
- See “Removing the Feed Roller,” on p. 116.
- See “Removing the Retard Roller,” on p. 119.
Guide Boards