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Caution: Do not use liquid or glass cleaner on the cotton swab.
Note: The ultrasonic sensors do not normally require maintenance. However, if multiple feed errors
occur frequently, it is possible that dust that has accumulated around the ultrasonic sensors is being
mistakenly detected as a multiple feed error. If dust has accumulated around the ultrasonic sensors,
carefully wipe away any large clumps with a cotton swab. Wipe away any smaller particles of dust
with a cotton swab dampened with a small amount of cleaner. If you have a blower, such as one
used to clean cameras, use it to remove the dust.
Do not spray cleaner directly onto the ultrasonic sensor. Also, be careful not to insert the cotton
swabs too far into the sensor.
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