HP LaserJet 6pmp Printer series - Manual (Page 85)

Vertical Fade
If a vertical white streak or faded area appears on the page:
•
The toner supply is low. See page 4-4 to temporarily extend the
toner cartridge life. If this does not improve the print quality,
install a new toner cartridge.
•
The print density adjustment is too light. See page 4-2 to adjust
print density.
•
EconoMode may be on. See page 4-4 to turn EconoMode off.
•
The internal mirror may need to be cleaned. See page 4-8 for the
internal cleaning procedure.
•
The paper may not meet HP’s paper specifications (for example,
too moist or too rough). See Appendix B for media specifications.
Dropouts
If faded-out areas, generally rounded, occur randomly on the page:
•
A single sheet of paper may be defective. Try reprinting the job.
•
The moisture content of the paper is uneven or the paper has moist
spots on its surface. Try paper from a different source. See
Appendix B for media specifications.
•
The paper lot is bad. The manufacturing processes can cause some
areas to reject toner. Try a different kind or brand of paper. See
Appendix B for media specifications.
If these steps do not correct the problem, see an HP authorized
dealer or service representative.
Vertical Lines
If black or white vertical streaks appear on the page:
•
The photosensitive drum inside the toner cartridge has probably
been scratched. Install a new toner cartridge.
•
The internal mirror may need to be cleaned. See page 4-8 for the
internal cleaning procedure.
5-8 Problem Solving
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