100
Black toner marks across the
page
Make sure that you use paper that meets our specifications. (See
Acceptable paper and other print media on page 14.)
If you use label sheets for laser machines, the glue from the sheets
may sometimes stick to the OPC drum surface. Clean the drum unit.
(See Cleaning the drum unit on page 120.)
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 a toner cartridge on page 122.)
The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit on page 125.)
Line across the page
Clean the laser scanner window and the corona wire inside the drum
unit. (See Cleaning the laser scanner window on page 116 and
Cleaning the corona wire on page 118.)
The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit on page 125.)
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.
Be sure to return the green tab to the home position (a). (See
Cleaning the corona wire on page 118.)
The toner cartridge may be damaged. Put in a new toner cartridge.
(See Replacing a toner cartridge on page 122.)
The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit on page 125.)
The fuser unit may be smudged. Call your Brother dealer for service.
Examples of poor print
quality
Recommendation
ABCDEFGH
abcdefghijk
ABCD
abcde
01234
ABCDEFGH
abcdefghijk
ABCD
abcde
01234
ABCDEFGH
abcdefghijk
ABCD
abcde
01234
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