ENWW Repetitive defects troubleshooting 389
Table 7-39 Repetitive defect cause
Note: A problem that appears only at the leading edge of image with no repetition.
Problem
Area
Period of
defect
(mm)
Problem
Dirt on
front
Blank
spots
Dirt on
back
Poor
fuser
Tray 2 feed roller About 42
X
Tray 2 feed sub roller About 41
X
Registration roller About 44
X
Registration sub roller About 41
X
Primary charging roller About 26
X
Photosensitive drum About 77
X X
Developing cylinder About 38
X
fuser sleeve About 75
X X
Pressure roller About 41
X X
fuser delivery roller About 46
X
Face-down delivery roller About 41
X
Face-down delivery sub roller About 28
X
Cassette pick-up roller Note
X
Multi-purpose tray pick-up roller Note
X
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