Note: Before solving the problem, print the Print Quality Test Pages. From the control panel, navigate to Settings > Troubleshooting > Print Quality Test Pages.
Replace the imaging unit, and then print the document.
Is the print density uneven?
Contact customer support.
The problem is solved.
Change the toner density setting of your printer to get the best prints.
Add this option to your printer to enable unattended printing, including automatic offset stacking and hole punching.