Brother HL-L9300CDW Service Manual page 131

■
Print crease
<User Check>
Step
1 Fuser unit failure
<Back side>
■
Spots at the rear edge of paper
<User Check>
Step
1 Fuser unit failure
- Check the machine's environment. High temperature and high humidity
or low temperature and low humidity conditions can cause this problem.
- 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.)
Cause
Fig. 2-13
- Check the machine's environment. High temperature and high humidity
or low temperature and low humidity conditions can cause this problem.
- Print with the envelope lever is lowered. (See the figure above.)
Cause
2-111
Remedy
Replace the fuser unit.
Envelope lever
PR arm cover
Remedy
Replace the fuser unit.
Envelope lever
PR arm cover
Confidential