HP LaserJet Pro 4001dw Monochrome Wireless Printer - Manual (Page 106)

1. Remove the toner cartridge from the printer, and verify that the sealing tape has been removed.
2. Check the memory chip for damage.
3. Examine the surface of the green imaging drum.
CAUTION: Do not touch the imaging drum. Fingerprints on the imaging drum can cause print-
quality problems.
4. If you see any scratches, fingerprints, or other damage on the imaging drum, replace the toner
cartridge.
5. Reinstall the toner cartridge and print a few pages to see if the problem has resolved.
Check paper and the printing environment
Use the following information to check the paper selection and the printing environment.
Step one: Use paper that meets HP specifications
Some print-quality problems arise from using paper that does not meet HP specifications.
● Always use a paper type and weight that this printer supports.
● Use paper that is of good quality and free of cuts, nicks, tears, spots, loose particles, dust, wrinkles,
voids, staples, and curled or bent edges.
● Use paper that has not been previously printed on.
● Use paper that does not contain metallic material, such as glitter.
● Use paper that is designed for use in laser printers. Do not use paper that is designed only for use in
Inkjet printers.
● Use paper that is not too rough. Using smoother paper generally results in better print quality.
Step two: Check the environment
The environment can directly affect print quality and is a common cause of print-quality or paper-
feeding issues. Try the following solutions:
● Move the printer away from drafty locations, such as open windows or doors, or air-conditioning
vents.
● Make sure the printer is not exposed to temperatures or humidity outside of printer specifications.
● Do not place the printer in a confined space, such as a cabinet.
● Place the printer on a sturdy, level surface.
● Remove anything that is blocking the vents on the printer. The printer requires good air flow on all
sides, including the top.
● Protect the printer from airborne debris, dust, steam, grease, or other elements that can leave
residue inside the printer.
Step three: Set the individual tray alignment
Follow these steps when text or images are not centered or aligned correctly on the printed page when
printing from specific trays.
Check paper and the printing environment 97