Canon imageRUNNER ADVANCE C3330 Series, Troubleshooting Manual, Page: 40 / 200

Copier Color | iR-ADV C3330/C3325/C3320 Series |
Coarse image from the leading edge to about 70mm from the
trailing edge of paper
[Symptom]
Coarse image [a] may occur from the leading edge to around 70mm from the trailing edge of paper with a Bk halftone image
under high temperature and high humidity environment.
A phenomenon becomes easy to be seen by the coated paper with the smooth surface.
The arrow [b] indicates the feed direction.
[Cause]
While the trailing edge of the paper passes through the registration roller, if the same paper is slipped slightly at the nip of the
secondary transfer roller, the behavior of paper becomes unstable.
At this time, if the paper comes in contact with the ITB that is located in upstream of the secondary transfer roller, the toner image
on ITB is deranged and the above mentioned symptom occurs.
Under high temperature and high humidity environment, if the speed of the registration roller is higher than that of the secondary
transfer roller and the paper is fed in a sort of pushing manner, the behavior of the paper becomes unstable and likely to have
the symptom.
[Service work]
1) Go to Service mode > Mode List > COPIER > Adjust > FEED-ADJ > and change the setting value of "REG-SPD" to "-1".
The range of setting is from "-5" to "5" ("0" by default).
[Caution] The speed of registration may slow down and the magnification of the sub-scanning (the feed direction) slightly becomes
smaller with this change of the setting.
2) Output the image having shown the symptom, and check that the symptom does not occur.
If the symptom does not improve sufficiently, reduce the setting value in the step 1) by "1" at a time down to "-5" until the symptom
improves enough.
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