Cleaing the Roller Unit and Retard Roller
If streaks appear in scanned images, or if scanned documents become dirty, the roller unit and retard roller may be dirty. Be sure to clean them regularly.
The roller unit and retard roller are located inside the feeder cover. Be sure to remove the roller unit and retard roller, as shown below, before cleaning them.
Removing the Roller Unit and Retart Roller
1. Open the document feed tray and feeder cover.
2. Raise the roller unit's lock lever. (Gently bend the lock lever inward, then raise it.)
3. Remove the roller unit.
Hold the center of the roller unit (roller portion), lift the lock lever side (1), then the other side (2).
4. Put your finger in the thumb hook, as shown in the figure, and open the cover in the direciton of the arrow.
5. Push the retard roller to the right to separate it from its axis and remove it.
6. Use a cloth dampened with water and thoroughly wrung out to wipe the roller clean.
Attaching the Roller Unit and Retart Roller
1. Attach the Retard Roller.
Set the retard roller in the recess inside the roller cover.
Make sure the roller's notch is aligned with the axis on the front unit, and then push the roller further into the recess.
2. Close the cover.
3. Attach the roller unit.
Insert the shaft pin of the roller unit into the notch on the scanner (1), and attach the lock lever vertically (2).
4. Lower the lock lover to secure the roller unit into place. You can lower the lock lever smoothly by gently bending it inward.
5. Close the feeder cover and document feed tray.
When closing the feeder cover and document feed tray, be careful not to get your fingers caught, as this may result in personal injury.
The roller unit and retard roller are consumable parts. If performance does not improve after cleaning the roller unit and retard roller, the parts need to be replaced. Contact your local authorized Canon dealer. When replacing the parts, first replace the retard roller. If performance does not improve, replace the roller unit as well.
