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Examples of poor print
quality
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
Toner specks
All black
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
Black toner marks across the
page
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
Line across the page
Recommendation
Make sure that you use paper that meets our specifications. Rough-
surfaced paper may cause the problem. (See Acceptable paper and
other print media on page 14.)
Clean the corona wire and the drum unit. (See Cleaning the corona
wire on page 96 and Cleaning the drum unit on page 98.)
The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit on page 103.)
The fuser unit may be contaminated. Call Brother Customer Service
at 1-877-BROTHER (1-877-276-8437) (in USA)
or 1-877-BROTHER (in Canada).
Clean the corona wire inside the drum unit by sliding the blue tab. Be
sure to return the blue tab to the home position (a). (See Cleaning the
corona wire on page 96.)
The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit on page 103.)
The fuser unit may be contaminated. Call Brother Customer Service
at 1-877-BROTHER (1-877-276-8437) (in USA)
or 1-877-BROTHER (in Canada).
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 98.)
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 101.)
The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit on page 103.)
Clean the laser scanner window and the corona wire inside the drum
unit. (See Cleaning the laser scanner window on page 95 and
Cleaning the corona wire on page 96.)
The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit on page 103.)
Troubleshooting and routine maintenance
C
79
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