- Hewlett-Packard Color Laser Printer Instruction Handbook

92
Care and Maintenance
■ Print quality problems
Trouble Corrective Action
Prints have dull, faded
colors.
Print the Color Calibration Page from the Color Calibration
menu in the printer panel. Check the density settings for
each color and compare them to the examples on the Color
Calibration Reference card. Refer to Setting the Color
Density on page 30 for instructions on comparing and
setting color density.
Make sure that the imaging unit stays covered until immedi-
ately before installing it in the printer. Exposure to light can
damage the imaging unit and will produce light streaks or
faded prints.
Make sure that the toner developers are installed correctly.
Make sure that you use a high-quality laser paper:
60-105 g/m
2
(16-28 lbs.) paper in the media cassettes and
75-165 g/m
2
(20-44 lbs.) paper in the multi-purpose tray.
Image is very faded or
pieces of the image are
missing; toner on the
page is loose.
When using the multi-purpose tray, make sure that you
have selected the correct media type in the driver or in the
MODE menu of the operation panel.
Streaks or spots Most spots are caused by fingerprints or dust introduced
into the printer while installing the imaging unit or loading
media.
Make sure that the surface where you unpack the imaging
unit, paper, and transparencies is free of dust. Keep supplies
in a covered area or a closed box.
Make sure that the imaging unit stays covered until immedi-
ately before installing it in the printer. Exposure to light for
more than 45 seconds can damage the imaging unit.
Do not touch the right side or underside of the imaging unit;
fingerprints affect print quality.
Make sure that the paper or transparency film is clean.
Make sure that you handle the media on the outside edges to
avoid fingerprints.
To get rid of fingerprint spots, print a few prints.
The back of the printed
page appears dirty.
Toner particles have contaminated the transfer roller. This
can happen if the printed image is larger than the media (for
example, when printing on envelopes). Run 10-20 prints to
clean the transfer roller.
The print quality of a
transparency is poor.
There is a defect on the coated surface of the transparency.
Print on the other side.