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6 - 25 TROUBLESHOOTING
HL7050_US_UG_FM5.5
Black lines down
the page
Printed pages have toner
stains stripes down the
page.
■ The toner cartridge may be damaged. Put in a new
toner cartridge. See Replacing the toner cartridge in
Chapter 5.
■ 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 in
Chapter 5.
Black spots
Black spots at 108 mm
(4.25 in.) intervals.
■ Print the cleaning page. To print these two sheets,
use the control panel Menu buttons to go to the
INFORMATION menu and then to the
MAINTENANCE menu to select CLEANING PAGE.
If the black spots still appear, print the cleaning page
again. For more information, see Chapter 3.
All black
■ 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 in
Chapter 5.
■ The drum unit may be damaged. Put in a new drum
unit. See Replacing the drum unit in Chapter 5.
Lines across the page
■ 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
108 mm
(4.25 in.)
108 mm
(4.25 in.)
ABCDEFGH
abcdefghijk
ABCD
abcde
01234