Vertical dark lines or streaks
Note:
Before solving the problem, print the Print Quality Test Pages. From the control panel, navigate to
Settings
>
Troubleshooting
>
Print Quality Test Pages
. For non
‑
touch
‑
screen printer models, press
to
navigate through the settings.
Action
Yes
No
Step 1
a
Check if the printer is using a genuine and supported Lexmark
toner cartridge.
Note:
If the toner cartridge is not supported, then install a
supported one.
b
Print the document.
Do vertical dark lines or streaks appear on prints?
Go to step 2.
The problem is
solved.
Step 2
a
Remove, and then reinstall the imaging unit.
Warning—Potential Damage:
Do not expose the imaging unit
to direct light for more than 10 minutes. Extended exposure
to light can cause print quality problems.
Warning—Potential Damage:
Do not touch the
photoconductor drum under the imaging unit. Doing so may
affect the quality of future print jobs.
b
Print the document.
Do vertical dark lines or streaks appear on prints?
Go to step 3.
The problem is
solved.
Step 3
a
Replace the imaging unit.
b
Print the document.
Do vertical dark lines or streaks appear on prints?
Contact
The problem is
solved.
Troubleshooting
177
Summary of Contents for M5255
Page 107: ...2 Remove the toner cartridge 3 Remove the used imaging unit Maintaining the printer 107 ...
Page 118: ...2 Remove the used pick roller 3 Unpack the new pick roller Maintaining the printer 118 ...
Page 119: ...4 Install the new pick roller 5 Close the multipurpose feeder Maintaining the printer 119 ...
Page 141: ...2 Remove the staple cartridge holder 3 Remove the loose staples Clearing jams 141 ...
