HP LaserJet Enterprise M552 - Page 440

Table 2-54 Image defects table (continued)
Problem Sample Cause Solution
Vertical white lines appear in all
colors.
Horizontal scratches on the
fuser roller.
Replace the fuser.
Scratches are present on the
circumference of the ITB.
Replace the ITB.
Horizontal lines appear on the
page.
Repetitive horizontal lines
appear.
Use the repetitive defects ruler to
identify the dirty roller. Clean the
roller. If the roller cannot be cleaned,
replace the fuser.
Horizontal scratches are
present on the photosensitive
drum.
Replace the toner cartridge of the
color that matches the defect.
Horizontal scratches are
present on the fuser roller.
Replace the fuser.
A horizontal white line displays on
the page.
Repetitive horizontal white lines
appear.
Use the repetitive defects ruler to
identify the dirty roller. Clean the
roller. If the roller cannot be cleaned,
replace the roller.
Horizontal scratches are
present on the photosensitive
drum.
Replace the toner cartridge of the
color that matches the defect.
Scratches are present on the
circumference of the ITB.
Replace the ITB.
412 Chapter 2 Solve problems ENWW