Vertical Dark Bands Check - Lexmark B2650 Service Manual

Actions
Step 1
Check if the printer is using a genuine and supported Lexmark
toner cartridge.
Note: If the printer is using a third‑party cartridge, refer the users
to their cartridge supplier.
Is the printer using a genuine and supported toner cartridge?
Step 2
Install a genuine and supported toner cartridge.
Does the problem remain?
Step 3
Clean the printhead lens. See
page 257.
Note: This is applicable only to models installed with a galvo
LSU. To determine whether the LSU is galvo, check the serial
number of the printer. The sixth digit character assigned should
be in the 0–9 or B–N range (Example: 4514 20HH 007CR).
Does the problem remain?
Step 4
Replace the printhead. See
Does the problem remain?
Step 5
Replace the imaging unit.
Does the problem remain?

Vertical dark bands check

Note: Before performing this print quality check, go to the control panel home screen and navigate to
Settings > Troubleshooting > Print Quality Test Pages, and then perform the Initial print quality check.
See "Initial print quality check" on page
"Cleaning the printhead lenses" on
"Printhead removal" on page
26.
Diagnostics and troubleshooting
51
Yes
Go to step 3.
Go to step 3.
Go to step 4.
Go to step 5.
239.
Contact the next
level of support.
4600-830, -835, -895
No
Go to step 2.
The problem is
solved.
The problem is
solved.
The problem is
solved.
The problem is
solved.