Brother HL-1435 User Manual page 90

Examples of poor print
quality
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
Black toner marks across
the page
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
White lines across the page
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
Lines across the page
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
Black lines down the page
Printed pages have toner
stains down the page.
Recommendation
The drum unit may be damaged. Put in a new drum unit. See Replacing the
drum unit on page 5-9.
Make sure that you use paper that meets our specifications. See What kind
of paper can I use? on page 1-5.
If you use label sheets, the glue from the sheets may sometimes stick to
the OPC drum surface. Clean the drum unit. See Cleaning on page 5-12.
Do not use paper that has clips or staples because they will scratch the
surface of the drum.
If the unpacked drum unit is in direct sunlight or room light, the unit may be
damaged.
Make sure that you use paper that meets our specifications. A rough surfaced
paper or thick print media can cause the problem.
Make sure that you select the appropriate media type in the printer driver.
The problem may disappear by itself. Try printing multiple pages to clear this
problem, especially if the printer 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 5-9.
Clean the inside of the printer and the primary corona wire in the drum unit.
See Cleaning on page 5-12.
The drum unit may be damaged. Put in a new drum unit. See Replacing the
drum unit on page 5-9.
Clean the primary corona wire of the drum unit. See Cleaning on page 5-12.
Make sure the primary corona wire cleaner is at the home position ( ).
The drum unit may be damaged. Install a new drum unit. See Replacing the
drum unit on page 5-9.
The toner cartridge may be damaged. Put in a new toner cartridge. See
Replacing the toner cartridge on page 5-3. Make sure that a torn piece of
paper is not inside the printer covering the scanner window.
The fixing unit may be smudged. Call Customer Service.
TROUBLESHOOTING 6 - 13