Filter
Top Products
Repetitive defects troubleshooting
Defects on printer rollers can cause image defects to appear at regular intervals on the
page. Use the repetitive defects ruler, see
Figure 7-4. Repetitive defects ruler following the
table on the next page, to measure the distance between defects that recur on a page. Use
Table 7-39. Repetitive defect cause table, below, to determine which roller is causing the
defect. To resolve the problem, try cleaning the roller first. If the roller is still dirty after
cleaning or if it is damaged, replace it.
CAUTION
Do not use solvents or oils to clean rollers. Instead, rub the roller with lint-free paper. If dirt is
difficult to remove, rub the roller with lint-free paper dampened with rubbing alcohol.
NOTE
Defects on the Tray 2 pickup roller or the multipurpose tray pickup roller do not cause a
repetitive defect. Defects on these rollers cause a defect to appear only on the leading edge
of the image.
Table 7-39. Repetitive defect cause
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
ENWW Repetitive defects troubleshooting 401