HP LaserJet 6L Pro Printer - Manual (Page 55)

EN Solving print quality problems 53
Vertical white stripes appear on
the page. The printer’s internal optics are
contaminated. Contact an authorized
HP service representative to
replace the printer’s internal
mirror. See the support
pages at the front of this
manual for support options.
Transfer roller is
contaminated.
Clean printer or call a
service technician.
Character voids appear (white
areas within the parts of
characters that should be solid
black). If you are using transparencies,
they may not meet
HP’s specifications.
You may be printing on the
wrong surface of the paper.
The paper may not meet
HP’s specifications.
Ambient conditions.
Try using different
transparencies.
Remove the paper and turn
it over. (The wrapper on
many reams of paper has an
arrow indicating the print
side.)
Try using different paper.
See appendix C.
Change printer environment.
See appendix B.
Stains or smudges appear as
small, round, black dots on the
front or back of a page.
Sometimes inconsistent stains
appear. Internal rollers within the printer
are dirty.
Defective toner cartridge
(damage OPC).
Clean the printer.
Replace cartridge.
Problem Cause(s) Solution(s)