HP M9050 MFP manual Vertical white lines, Tire tracks, White spots on black

Vertical white lines

Figure 12-83Vertical white lines

1.Print a few more pages to see if the problem corrects itself.

2.Make sure that the type and quality of the media you are using meet HP specifications. See Supported paper and print media sizes on page 81.

3.Replace the print cartridge.

Tire tracks

Figure 12-84 Tire tracks

Aa BbC c

Aa BbC c

Aa BbC c

Aa BbC c

Aa BbC c

Aa BbC c

Aa BbC c

Aa BbC c

Aa BbC c

Aa BbC c

This defect typically occurs when the print cartridge has far exceeded its rated life. For example, if you are printing a very large quantity of pages with very little toner coverage.

1.Replace the print cartridge.

2.Reduce the number of pages that you print with very low toner coverage.

White spots on black

Figure 12-85White spots on black

1.Print a few more pages to see if the problem corrects itself.

2.Make sure that the type and quality of the media you are using meet HP specifications. See Supported paper and print media sizes on page 81.

ENWW Solve print-quality problems 225