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Solve image quality problems
This section helps you define print-quality problems and what to do to correct them. Often print-quality
problems can be handled easily by making sure that the product is maintained, using paper that meets
HP specifications, or running a cleaning page.
Image defects table
The following examples depict letter-size paper that has passed through the product short-edge first.
These examples illustrate problems that would affect all the pages that you print, whether you print in
color or in black only. The topics that follow list the typical cause and solution for each of these
examples.
Table 3-49 Image defects table
Problem Sample Cause Solution
Print is light or faded on entire
page.
Poor contacts exist on the ITB
unit and the product
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
contacts on the ITB unit and
product.
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 print
cartridge and product.
Poor developing bias contacts
with the print cartridge and
product.
Image is too dark.
The RD sensor is defective. Replace the RD sensor.
Page is blank.
The high-voltage power-supply
lower is defective (no
developing bias output).
Replace the high-voltage power-
supply lower.
ENWW
Solve image quality problems
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