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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 16.)
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 55.)
The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit uu page 62.)
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 60.)
Make sure the green tab of the corona wire is at the home
position (a).
The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit uu page 62.)
The toner cartridge may be damaged. Put in a new toner
cartridge. (See Replacing the toner cartridge uu page 55.)
The fuser unit may be contaminated. Call Brother Customer
Service.
White lines down the page
The toner cartridge may be damaged. Put in a new toner
cartridge. (See Replacing the toner cartridge uu page 55.)
The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit uu page 62.)
Check if the Toner Settings of Replace Toner is Continue
(Continue mode), by pressing Menu, 1, 7. (See Advanced User’s
Guide: Toner Settings.)
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.
Examples of poor print quality Recommendation
ABCDEFGH
abcdefghijk
ABCD
abcde
01234
ABCDEFGH
abcdefghijk
ABCD
abcde
01234
ABCDEFGH
abcdefghijk
ABCD
abcde
01234