White Line Ii Service Check - Lexmark C720 Service Manual

5024-001

White Line II Service Check

Vertical white line appears from the leading edge to the trailing edge
of the printed image.
FRU
1 Optical Unit (Printhead)
2 Optical Unit (Printhead)
3 Toner Cartridge
2-102
Service Manual
Action
Clean the dust-proof glass.
Dust-proof glass in the optical unit is
smeared with toner or foreign
particles.
Remove the belt cartridge and toner
cartridge.
Remove the dust-proof glass from
the optical unit.
Clean the dust-proof glass.
Foreign particles adhering to the
laser beam opening of the optical
unit.
Clean the laser beam opening in the
optical unit.
Foreign particles mixed in the toner
cartridge.