Dell 3110 Color Laser User Manual page 280

Testing "Print Quality"
"Print Quality" is used to diagnose print quality defects.
1. On the Customer Mode menu, go down to Cyan20%, Magenta20%, Yellow20%, or Black20% and press
.
Outputs cyan toner at 20% density on the whole area of the paper.
Cyan20%
Outputs magenta toner at 20% density on the whole area of the paper.
Magenta20%
Outputs yellow toner at 20% density on the whole area of the paper.
Yellow20%
Black20% Outputs black toner at 20% density on the whole area of the paper.
After you output the test results, contact Dell.