Mm Pitch Banding - Canon imagePRESS C7000VP Series Trouble Shooting Information

3.14 3.7mm Pitch Banding

 Symptom
Due to abrasion of the photosensitive drum cleaner drive gears or the like, 3.7mm banding
image may occur.
 Cause
The photosensitive drum drive gears do not engage well because of abrasion, and this caused
vibration. This results in uneven drum rotation and causes 3.7mm banding image.
This symptom also occurs due to soiled gears or contaminants.
 Field Remedy
1. Check the sliding performance of the gears.
In a heavy sliding condition, there may be foreign objects on the shaft and inner
circumference of two types of gears [3] and [4].
In this case, clean the shaft and inner circumference with lint-free paper containing alcohol.
4. If the problem is not eliminated after performing the foregoing procedure, replace the
photosensitive drum cleaner drive gear [5].
5. If the problem still occurs, try performing the procedure in
developing drive assembly/Cracked developing drive
Image Sample
Trouble Shooting Information for C7000VP series
Page 77
[1] Developing assembly
[2] Drum cleaner motor unit
[5]
[3] 32T gear FU6-0474
[4] 26T/26T gear FU6-0473
[5] 16T/55T gear FU6-0304
Rev. 2.0
2010/09/17
2.9 Noise from around
gear.