Lexmark MX826 User Manual page 257

Troubleshooting
Action
a
Check if the printer is using a genuine and supported Lexmark
toner cartridge.
Note: If the cartridge is not supported, then install a
supported one.
b
Print the document.
Do vertical light bands appear on prints?
Vertical white lines
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
navigate through the settings.
Action
Step 1
a
Check if the printer is using a genuine and supported Lexmark
toner cartridge.
Note: If the cartridge is not supported, then install a
supported one.
b
Print the document.
Do vertical white lines appear on prints?
Step 2
Fix slow printing problems. For more information, see
printing" on page 265.
Do vertical white lines appear on prints?
Step 3
a
Replace the imaging unit.
b
Print the document.
Do vertical white lines appear on prints?
Yes
Contact customer
support.
Yes
Go to step 2.
Go to step 3.
"Slow
Contact customer
support.
257
No
The problem is
solved.
to
No
The problem is
solved.
The problem is
solved.
The problem is
solved.