Dell 3100cn Color Laser Printer - Manual (Page 81)

Use the Customer Mode to locate the unit in the printer that causes a problem.
Diagnostic Menu Map (Customer Mode)
1. Turn off the printer.
2. Turn on the printer while holding down and .
The Customer Mode menu appears.
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 .
After you output the test results, contact Dell.
Testing "Toner Pallets Check" or "Contamination Check"
"Toner Pallet Check" and "Contamination Chk" are used to diagnose machine problems.
1. On the Customer Mode menu, go down to TonerPalletCheck or ContaminationChk, and press .
Cyan20%
Outputs cyan toner at 20% density on the whole area of the paper.
Magenta20%
Outputs magenta toner at 20% density on the whole area of the paper.
Yellow20%
Outputs yellow toner at 20% density on the whole area of the paper.
Black20%
Outputs black toner at 20% density on the whole area of the paper.
Toner Pallet Check
Allows you to identify the problem with the toner when print quality problems occur while printing pictures or photos.
Contamination Check
Allows you to check for any regular lines or spots when printing if print quality problems are occurring.