Brother HL-5450DNT - Manual (Page 150)

144
Troubleshooting
6
Hollow print
 Make sure that you use paper that meets our specifications.
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Acceptable paper and other print media uu page 2
 Choose Thick Paper mode in the printer driver or use thinner paper than you
are currently using.
 Check the machine’s environment. Conditions such as high humidity can
cause hollow print.
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Product Safety Guide: Choose a safe location for your product
 The drum unit may be damaged. Put in a new drum unit.
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Replacing the drum unit uu page 105
All black
 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).
uu Cleaning the corona wire uu page 112
 The drum unit may be damaged. Put in a new drum unit.
uu Replacing the drum unit uu page 105
White lines across the page
 Make sure that you use paper that meets our specifications. A rough surfaced
paper or thick print media can cause this problem.
uu
Acceptable paper and other print media uu page 2.
 Make sure that you choose the appropriate media type in the printer driver.
 The problem may disappear by itself. Print multiple blank pages to clear this
problem, especially if the machine has not been used for a long time.
 The drum unit may be damaged. Put in a new drum unit.
uu
Replacing the drum unit uu page 105
Line across the page
 Clean the corona wire inside the drum unit.
uu Cleaning the corona wire uu page 112
 The drum unit may be damaged. Put in a new drum unit.
uu Replacing the drum unit uu page 105
Examples of poor print quality Recommendation
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4