Dents On An Image At 25Mm Intervals Due To Soiled Decurler Rollers Of Decurler Unit - Canon imagePRESS C800 Series Troubleshooting Manual

Chapter 1
3) Insert the cleaning member [a] between the upper and lower guides of the decurler unit to move the member 3 to 5 times back and forth for cleaning.
4) Output the image having shown the symptom, and check that the symptom does not occur.
If the symptom does not improve, check other causes.

1.1.1.6.9 Dents on an image at 25mm intervals due to soiled decurler rollers of decurler unit

0031-7353
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Symptom
Dents [a] on an image 25mm may appear at 25mm intervals.
The symptom can be easily seen especially on high density images of heavy coated paper.
[b] shows the paper feed direction.
Cause
The above symptom occurs when dust and foreign objects are attached to the decurler rollers [a] where the decurler adjustment rollers face.
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