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TROUBLESHOOTING 6 - 26
HL7050_US_UG_FM5.5
White lines down
the page
■ 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.
Black toner marks
across the page
■ The drum unit may be damaged. Put in a new drum
unit. See Replacing the drum unit in Chapter 5.
White Spots on black
text and graphics at
94mm (3.7 in.) intervals
■ The drum unit may be damaged. Put in a new drum
unit. See Replacing the drum unit in Chapter 5.
Black spots at 94 mm
(3.7 in.) intervals.
■ The drum unit may be damaged. Put in a new drum
unit. See Replacing the drum unit in Chapter 5.
Examples of poor
print quality
Recommendation
ABCDEFGH
abcdefghijk
ABCD
abcde
01234
ABCDEFGH
abcdefghijk
ABCD
abcde
01234
94 mm
(3.7 in.)
94 mm
(3.7 in.)
94 mm
(3.7 in.)
94 mm
(3.7 in.)
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