Operation Manual

144 Chapter 6 - Troubleshooting
EN
Copies or
scanned
images are too
light or too
dark.
The contrast is not set correctly. 1. Adjust the contrast and resolution
settings from the HP LaserJet Copier
software.
2. Adjust the Quick Copy settings.
3. Check that the contrast and resolution
settings are correct. See the user guide
for more information.
The original image is very light or very
dark.
Adjust the resolution and contrast
setting(s) from the toolbox on the
HP LaserJet Director or HP Document
Manager.
The scanned image is too light or too
dark because the original was on colored
paper.
If the original was on a colored paper,
including brown recycled paper, the text
might not be clear. Adjust the resolution,
contrast, and brightness settings from
the toolbox on the HP LaserJet Director
or HP Document Manager.
Vertically-
aligned black
streaks or
smears appear
on successive
pages.
The printer needs to be cleaned. Clean the printer. (See “Cleaning the
print path” on page 47.)
There is ink, glue, white-out, or some
other substance on the contact image
sensor.
Clean the copier/scanner assembly.
(See “Cleaning the scanner path” on
page 51.)
A component is damaged. (For example,
the photosenstive drum inside the toner
cartridge is scratched.)
1. Use the defect ruler to identify the
spacing. Check the appropriate
component and replace if necessary.
(See “Repetitive image defect ruler” on
page 161.)
2. Replace the toner cartridge if it is
damaged and maintenance procedures
do not improve print quality.
Scanned
images have
black dots or
streaks.
There is ink, glue, correction fluid, or
some other substance on the contact
image sensor.
Clean the scanner path. (See “Cleaning
the scanner path” on page 51.)
There is a problem in the contact image
sensor.
Replace the copier/scanner assembly.
Table 18. Solving copying and scanning image-quality problems (continued)
Problem Cause Solution