Cleaning the Sensor Glass and the Rollers
If scanned images have extraneous marks, or if the scanned documents are dirty (black lines), then the sensor glass or rollers inside the scanner may be dirty. Clean them periodically.
1. Hold the Upper unit as shown in the diagram, and open it slowly until it stops.
The pickup roller is located in the middle of the Upper unit. Do not hold the protrusion on the Upper unit when you open it. Doing so may deform the pickup roller or cause a feeding error.
The location of the sensor glass and various rollers are shown below.
2. Use a clean, dry cloth to wipe dirt off the sensor glass.
Wipe the top and bottom sensor glasses.
Do not use spray type cleaners to clean the scanner. Precision mechanisms, such as the light source, may get wet which will cuase a malfunction.
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 to replace the sensor glass.
3. Wipe the rollers with a firmly wrung cloth moistened with water.
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.
4. Remove the pickup roller, feed roller, and retard roller.
5. Wipe the removed rollers with a firmly wrung cloth moistened with water.
Do not use detergent to clean the rollers, since any detergent on the rollers could cause a feeding error.
6. Attach the rollers that were removed.
7. Close the Upper unit slowly. Be sure that the Upper unit is completely closed by pusing on edges with hands until you hear a click.
Do not force the Upper unit to close. Doing so may damage the scanner.
