Operation Manual

Examples of poor print quality Recommendation
White lines, bands or ribbing across the page
White Spots on black text and graphics at 94 mm
intervals
Black spots at 94 mm intervals
• Make 10-15 copies of a blank, white sheet of paper. If
the problem is not solved after printing the blank
pages, the drum unit may have foreign material, such
as glue from a label, stuck on the drum. Clean the
drum unit.
See Related Information:Clean the Drum Unit Using
Drum Dot Print.
• The drum unit may be damaged.
Replace the drum unit with a new drum unit.
ABCDEFGH
abcdefghijk
A B C D 
a b c d e 
0 1 2 3 4
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 Using
Drum Dot Print.
• 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.
ABCDEFGH
abcdefghijk
A B C D 
a b c d e 
0 1 2 3 4
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.
ABCDEFGH
abcdefghijk
A B C D 
a b c d e 
0 1 2 3 4
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.
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