Brother HL-6050 User Manual page 151

Examples of poor print quality
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
stripes down the page.
Black spots
Black spots at 108 mm (4.25 in.)
intervals.
All black
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
Lines across the page
ABCDEFGH
abcdefghijk
ABCD
abcde
01234
White lines down the page
6 - 19 TROUBLESHOOTING
Recommendation
You may clear the problem by cleaning the primary corona wire inside the
drum unit by sliding the blue tab. Make sure to return the blue tab to the
Home position ( ). See Cleaning the corona wire on page 5-17.
The toner cartridge may be damaged. Put in a new toner cartridge. See
Replacing the toner cartridge on page 5-3.
The drum unit may be damaged. Put in a new drum unit. See Replacing
the drum unit on page 5-8.
The fuser unit may be smudged. Call Customer Service.
You may clear the problem by printing a black page.
You may clear the problem by cleaning the primary corona wire inside the
drum unit by sliding the blue tab. Make sure you return the blue tab to the
Home position ( ). See Cleaning the corona wire on page 5-17.
The drum unit may be damaged. Put in a new drum unit. See Replacing
the drum unit on page 5-8.
The fuser unit may be smudged. Call Customer Service.
Clean the inside of the printer and the primary corona wire in the drum unit.
See Cleaning on page 5-14.
The drum unit may be damaged. Put in a new drum unit. See Replacing
the drum unit on page 5-8.
You may clear the problem by wiping the scanner window with a soft cloth.
See Cleaning the inside of the printer on page 5-15 or the Maintenance
Tutorial video on the supplied CD-ROM.
The toner cartridge may be damaged. Put in a new toner cartridge. See
Replacing the toner cartridge on page 5-3.