HP Color LaserJet Enterprise M751n Laser Printer - Manual (Page 173)

Step two: Check supplies status
1. Look at the supplies status report to check the percent of life remaining for the toner cartridges and, if
applicable, the status of other replaceable maintenance parts.
Print quality problems can occur when using a toner cartridge that is at its estimated end of life. The
supplies status page indicates when a supply level is very low. After an HP supply has reached the very low
threshold, HP’s premium protection warranty on that supply has ended.
The toner cartridge does not need to be replaced now unless the print quality is no longer acceptable.
Consider having a replacement available to install when print quality is no longer acceptable.
If you determine that you need to replace a toner cartridge or other replaceable maintenance parts, the
supplies status page lists the genuine HP part numbers.
2. Check to see if you are using a genuine HP cartridge.
A genuine HP toner cartridge has the word “HP” on it, or has the HP logo on it. For more information on
identifying HP cartridges go to www.hp.com/go/learnaboutsupplies .
Print a cleaning page
During the printing process paper, toner, and dust particles can accumulate inside the printer and can cause print-
quality issues such as toner specks or spatter, smears, streaks, lines, or repeating marks.
Follow these steps to clean the printer's paper path.
1. Load plain paper in Tray 1.
2. From the Home screen on the printer control panel, select the Support Tools menu.
3. Select the following menus:
● Maintenance
● Calibration/Cleaning
● Cleaning Page
4. Select Print to print the page.
A Cleaning... message displays on the printer control panel. The cleaning process takes a few minutes to
complete. Do not turn the printer off until the cleaning process has finished. When it is finished, discard the
printed page.
Visually inspect the toner cartridge or cartridges
Follow these steps to inspect each toner cartridge.
1. Remove the toner cartridges 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.
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