Users Guide

148 Troubleshooting
Black toner marks across the
page
• If you use label sheets for laser printers, the glue from the sheets may sometimes stick to the
drum surface. Clean the drum unit.
• If you used paper that has clips or staples, the drum unit may be damaged.
• If the unpacked drum unit is in direct sunlight (or room light for long periods of time), the
unit may be damaged.
• Clean the drum unit.
• The toner cartridge may be damaged.
Replace the toner cartridge with a new toner cartridge.
• The drum unit may be damaged.
Replace the drum unit with a new drum unit.
Black lines down the page
Printed pages have toner
stains down the page
• Clean the corona wire inside the drum unit by sliding the tab.
Make sure you return the tab to the home position (p).
• The toner cartridge may be damaged.
Replace the toner cartridge with a new toner cartridge.
• The drum unit may be damaged.
Replace the drum unit with a new drum unit.
• The fusing unit may be contaminated.
Contact Dell Customer Service.
White lines down the page
• Make sure foreign material such as a torn piece of paper, sticky notes or dust is not inside
the machine and around the toner cartridge and drum unit.
• The toner cartridge may be damaged.
Replace the toner cartridge with a new toner cartridge.
• The drum unit may be damaged.
Replace the drum unit with a new drum unit.
Image skewed
• Make sure the paper or other print media is loaded correctly in the paper tray and the
guides are not too tight or too loose against the paper stack.
• Set the paper guides correctly.
• The paper tray may be too full.
• Check the paper type and quality.
• Check for loose objects such as torn paper inside the machine.
• (For automatic 2-sided printing models)
If the problem only occurs during 2-sided printing, check for torn paper in the 2-sided tray,
verify the 2-sided tray is inserted completely and the back cover is closed completely.