User Manual

Examples of poor print quality Recommendation
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.
See Related Information: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 green tab.
Make sure that the green tab on the drum unit is in the
Home position.
• 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 fuser unit may be contaminated.
Contact Brother 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
• Set the document correctly in the ADF or on the
scanner glass if the skew only occurs when making
copies.
• 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.
• If the problem only occurs during automatic 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.
• Check the paper type and quality. High temperatures
and high humidity will cause paper to curl.
• If you do not use the machine often, the paper may
have been in the paper tray too long. Turn over the
stack of paper in the paper tray. Also, fan the paper
stack, and then rotate the paper 180° in the paper
tray.
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