HP LaserJet MFP M139-M142 User Guide - Page 61

Check paper and the printing environment, Adjust Print Density

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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 Using paper that does not meet HP specifications might cause some print quality problems. The environment can directly affect print quality. Follow these steps to check paper 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 for 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. Adjust Print Density Adjust the print density when your printing results are too dense or too light in color. Complete the following steps to adjust the print density. 1. Open the HP Embedded Web Server. See Access the Embedded Web Server (EWS). 52 Chapter 8 Solve problems

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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
Using paper that does not meet HP specifications might cause some print quality problems. The environment can
directly affect print quality. Follow these steps to check paper 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 for 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.
Adjust Print Density
Adjust the print density when your printing results are too dense or too light in color.
Complete the following steps to adjust the print density.
1.
Open the HP Embedded Web Server. See
Access the Embedded Web Server (EWS)
.
52
Chapter 8
Solve problems