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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). (See
Cleaning the corona wire on page 58.)
The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit on page 59.)
The fuser unit may be contaminated. Call Brother Customer
Service.
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 problems.
Make sure that you choose the appropriate media type in the
printer driver or in the machine’s Paper Type menu setting. (See
Acceptable paper and other print media on page 17 and Basic tab
in the Software User’s Guide.)
The problem may disappear by itself. Print multiple 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. (See
Replacing the drum unit on page 59.)
Lines across the page
Clean the corona wire of the drum unit. (See Cleaning the corona
wire on page 58.)
The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit on page 59.)
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.
If the problem is not solved after printing a few pages, put in a new
drum unit. (See Replacing the drum unit on page 59.)
Examples of poor print quality Recommendation
ABCDEFGH
abcdefghijk
ABCD
abcde
01234
ABCDEFGH
abcdefghijk
ABCD
abcde
01234