HP LaserJet Enterprise M552 - Image defects table

Image defects table
The following examples depict letter-size paper that has passed through the printer short-edge rst. These
examples illustrate problems that would aect all the printed pages, whether they are printed in color or in
black only.
Table 2-54 Image defects table
Problem Sample Cause Solution
Print is light or faded on entire
page.
Poor contacts exist on the ITB
unit and the printer grounding
unit.
Clean the grounding contacts. If the
problem remains after cleaning, check
the contacts for damage. Replace any
deformed or damaged parts.
Poor secondary transfer
contacts exist on the secondary
transfer roller and the ITB.
Clean the contacts. If the problem
remains after cleaning, check the
contacts for damage. Replace any
deformed or damaged parts.
Print is light or faded in a
particular color.
Poor primary transfer bias (T1)
contacts on the ITB unit and
printer.
Clean the contacts of the color that
produces the light print. If the problem
remains after cleaning, check the
contacts for damage. Replace any
deformed or damaged parts.
Poor primary charging bias
contacts with the toner
cartridge and printer.
Poor developing bias contacts
with the toner cartridge and
printer.
Defective registration density
sensor.
Replace the registration density
sensor.
Print is too dark. Defective registration density
sensor.
Replace the registration density
sensor.
ENWW Solve image-quality problems 409