Brother HL-5470DWT - Manual (Page 159)

153
Troubleshooting
6
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 118
 The drum unit may be damaged. Put in a new drum unit.
uu Replacing the drum unit uu page 111
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 or
in the machine’s Media Type menu setting.
 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 111
Line across the page
 Clean the corona wire inside the drum unit.
uu Cleaning the corona wire uu page 118
 The drum unit may be damaged. Put in a new drum unit.
uu Replacing the drum unit uu page 111
White lines, bands or ribbing
across the page
 Check the machine's environment. Conditions such as high humidity and
high temperatures may cause this print quality problem.
uu Product Safety Guide: Choosing a location
 If the problem is not solved after printing a few pages, put in a new drum unit.
uu Replacing the drum unit uu page 111
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