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54 Regular Maintenance
Cleaning the Sensor Glass and the Rollers
If scanned images have extraneous marks, or if the scanned documents are
dirty, then the sensor glass or rollers inside the scanner may be dirty. Clean
them periodically.
1
Open the Document Feed Tray.
2
Pressing the OPEN Knob from both sides (q), pull the Front Unit forward to
open it (w).
3
Use a blower to keep the interior of the scanner free of dust and paper
particles.
4
Use a clean dry cloth to wipe dirt off the sensor glass.
Wipe both the top and bottom sensor glasses.
CAUTION
Do not use spray type cleaners to clean the scanner. Precision
mechanisms, such as the light source, may get wet which will
cause a malfunction.
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.