Brother HL-7050 Series User Manual page 194

Examples of poor
print quality
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
White lines down
the page
ABCDEFGH
abcdefghijk
ABCD
abcde
01234
Black toner marks
across the page
94 mm
(3.7 in.)
94 mm
(3.7 in.)
White Spots on black
text and graphics at
94mm (3.7 in.) intervals
94 mm
(3.7 in.)
94 mm
(3.7 in.)
Black spots at 94 mm
(3.7 in.) intervals.
Recommendation
You may clear the problem by wiping the scanner
window with a soft cloth. See Cleaning the inside of
the printer or the Maintenance Tutorial video on the
supplied CD-ROM.
The drum unit may be damaged. Put in a new drum
unit. See Replacing the drum unit in Chapter 5.
The drum unit may be damaged. Put in a new drum
unit. See Replacing the drum unit in Chapter 5.
The drum unit may be damaged. Put in a new drum
unit. See Replacing the drum unit in Chapter 5.
TROUBLESHOOTING 6 - 26