Brother DCP-L8400CDN Service Manual page 143

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Print crease
< User Check >
- Check the machine's environment. High temperature and high humidity
- Change the paper to thick paper.
- Check if paper is not damp.
- Check if the thickness of the paper is properly set in the driver.
- Print with the envelope lever is lowered. (Refer to the figure below.)
Step
1 Fuser unit failure
<Back side>
■
Spots at the rear edge of paper
< User Check >
- Check the machine's environment. High temperature and high humidity
- Print with the envelope lever is lowered. (See the figure above.)
Step
1 Fuser unit failure
or low temperature and low humidity conditions can cause this problem.
Cause
PR arm cover
Fig. 2-15
or low temperature and low humidity conditions can cause this problem.
Cause
2-113
Remedy
Replace the fuser unit.
Envelope lever
Remedy
Replace the fuser unit.
Envelope lever
PR arm cover
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