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Black toner marks across the
page
If you use label sheets for laser printers, the glue from the sheets may
sometimes stick to the OPC drum surface. Clean the drum unit.
See Advanced User's Guide: Cleaning the drum unit.
Make sure that you use paper that meets our specifications.
See Acceptable paper and other print media uu page 18.
Do not use paper that has clips or staples because they will scratch
the surface of the drum.
If the unpacked drum unit is in direct sunlight or room light, the unit
may be damaged.
The toner cartridge may be damaged. Put in a new toner cartridge.
See Replacing the toner cartridge uu page 64.
The drum unit may be damaged. Put in a new drum unit.
See Replacing the drum unit uu page 71.
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.
See Cleaning the corona wire uu page 69.
Make sure the green tab of the corona wire is at the home position (a).
The toner cartridge may be damaged. Put in a new toner cartridge.
See Replacing the toner cartridge uu page 64.
The drum unit may be damaged. Put in a new drum unit.
See Replacing the drum unit uu page 71.
The fuser unit may be contaminated.
Call Brother Customer Service.
White lines down the page
Make sure that foreign material such as a torn piece of paper, sticky
notes or dust is not inside the machine and around the drum unit and
toner cartridge.
The toner cartridge may be damaged. Put in a new toner cartridge.
See Replacing the toner cartridge uu page 64.
The drum unit may be damaged. Put in a new drum unit.
See Replacing the drum unit uu page 71.
Examples of poor print
quality
Recommendation
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