Canon imageFORMULA DR-C240 マニュアル

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Clean the scanner on a regular basis, as described below, to maintain 
peak scanning quality.

• When cleaning the scanner and the inside of the scanner, turn OFF 

the power switch and disconnect the power cord from the power 
outlet.

• Do not use spray cleaners to clean the scanner. Precision 

mechanisms, such as the light source, may get wet, and cause a 
malfunction.

• Never use paint thinner, alcohol, or other organic solvents to clean 

the scanner. The exterior of the scanner may become deformed, 
discolored, or melted. It may also cause a fire or electric shock.

To clean the outside of the scanner, wipe off any dirt with a cloth that 
has been dampened with water and thoroughly wrung out, and then 
wipe the scanner dry with a clean dry cloth.

Dust or paper particles inside the scanner may cause lines or 
smudges to appear on scanned images. Use compressed air to 
periodically clean dust and paper particles from the document feed 
opening and the inside of the scanner. After finishing a large scanning 
job, turn OFF the scanner and then clean out any paper particles 
remaining inside the scanner.

If scanned images contain streaks, or if the scanned documents 
become dirty, the sensor glass or rollers inside the scanner may be 
dirty. Clean them periodically.