Toner Fog Or Background Shading Check - Lexmark MX71x Service Manual

Action
Step 3
Check the laser beam route. Check for debris between the printhead
assembly and the PC drum.
Is the laser beam route free of debris, and the glass window in the
printhead assembly free of contamination?
Step 4
Check the print cartridge for proper installation.
Is the component properly installed?
Step 5
Check the transfer roller for contamination and wear.
Is the component free of excess wear and contamination?
Step 6
Check the laser printhead installation.
Is the component properly installed?
Step 7
Perform a print test.
Does the problem remain?

Toner fog or background shading check

Yes
Go to step 4.
Go to step 5.
Go to step 6.
Go to step 7.
Contact the next level
of support.
Diagnostic information
72
7463
No
Remove debris or clean
the printhead
assembly window.
Inspect, clean, and
replace the print
cartridge.
Replace the transfer
roller. See "Transfer
roller removal" on
page 480.
Replace the laser
printhead removal. See
"Laser printhead
removal" on page
457.
The problem is solved.