Dell C2660dn Color Laser Printer - Manual (Page 331)

Streaks appear on the output
Action Yes No
1 The toner cartridges may be low or need to be replaced. Confirm the
amount of toner left in each toner cartridge.
a Check the toner level in the Status tab in the Status Monitor.
The task is complete. Go to action 2.
b Replace the toner cartridges as necessary.
Does this solve your problem?
2 If you are using non-Dell brand toner cartridges, enable the Non-Dell
Toner option.
a Launch the Tool Box, and click Maintenance on the Printer
Maintenance tab.
The task is complete. Go to action 3.
b Ensure that the On check box under Non-Dell Toner is selected.
Does this solve your problem?
3 Replace the drum cartridges.
a Replace the drum cartridges. See "Replacing the Drum Cartridges."
b After you replace the drum cartridges, click Chart Print on the
Diagnosis tab.
c Click 4 Colors Configuration Chart.
The task is complete. Contact Dell.
The 4 Colors Configuration Chart is printed.
Does this solve your problem?
Part or the entire output is black
Action Yes No
1 Ensure that the drum cartridges are installed correctly. See "Installing a
Drum Cartridge."
The task is complete. Go to action 2.
Does this solve your problem?
Troubleshooting Guide 329