ENWW Image defects 383
Vertical lines
White vertical lines
If the lines appear in a particular color, go to step A. If they appear in full-color print, go to step B.
Horizontal line
If the line appears in a particular color, go to step A. If it appears in full-color print, go to step B.
Table 7-26 Causes for vertical lines
Cause Solution
Photosensitive drum has grooves going around the
circumference.
Replace the cartridge for the color of the vertical
lines.
Fuser sleeve has grooves around the circumference. Replace the fuser.
Table 7-27 Causes for white vertical line
Cause Solution
A Circumferential scratches on the developing
cylinder (print cartridge).
Replace the print cartridge.
Circumferential scratches on the photosensitive
drum.
Replace the print cartridge.
B Vertical scratches on the transfer unit. Replace the transfer unit.
Vertical scratches on the fuser sleeve. Replace the fuser.
Table 7-28 Causes for horizontal line
Cause Solution
A The developing cylinder is deformed by being left
engaged with the photosensitive drum for a long
time.
Refer to the Repetitive defect cause table, later in
this chapter, to find out if the interval of line agrees
with that of a developing cylinder. If so, output about
20 pages of print to solve the problem. If the problem
is not resolved, replace the cartridge.
Horizontal scratches on the photosensitive drum
(cartridge).
Refer to the Repetitive defect cause table, later in
this chapter, to find out if the interval of line agrees
with that of a photosensitive drum. If so, replace the
cartridge.
Print cartridge cleaning blade leaves a line of toner
on the drum (C-blade blur). This error is similar to
using a dust pan and broom. The line repeats
every 77mm.
At the printer control panel, set CONFIGURE
DEVICE/PRINT QUALITY/OPTIMIZE/ PRE-
ROTATION=ON
B Horizontal scratches on the fuser sleeve. Refer to the Repetitive defect cause table, later in
this chapter, to find out if the interval of line agrees
with that of a fuser sleeve. If so, replace the fuser.
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