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Action Yes No
Step 2
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 streaks with missing images appear on prints?
Contact
customer
support.
The problem is
solved.
Repeating defects
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
Using the Print Quality Test Pages, check if the distance
between the repeating defects is equal to any of the following:
• 96 mm (3.78 in.)
• 49 mm (1.93 in.)
• 47.5 mm (1.87 in.)
• 30.2 mm (1.18 in.)
Does the distance between the repeating defects match any of the
measurements?
Go to step 2. Take note of the
distance, and then
contact
customer
support.
Step 2
a Replace the imaging unit.
b Print the document.
Do the repeating defects appear?
Contact
customer
support.
The problem is
solved.
Troubleshooting 177
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