Print Quality-Horizontal Line; Print Quality-Insufficient Fusing; Print Quality-Missing Image At Edge; Print Quality-Mottle (2 - 5Mm Speckles) - Lexmark C520 Series Service Manual

Print quality—horizontal line
Potential cause
1 Photoconductor unit
Print quality—insufficient fusing
Potential cause
1 Fuser
2 LVPS
Print quality—missing image at edge
Potential cause
1 Developer cartridge
Print quality—mottle (2 - 5mm speckles)
Potential cause
1 Developer cartridge
Print quality—narrow vertical line
Potential cause
1 Photoconductor unit
2 Developer cartridge
Print quality—random marks
Service tip: The primary cause of random marks is due to loose material moving around inside the printer and
attaching to the photoconductor unit, developer roll, or transfer belt.
Potential cause
1 Photoconductor unit, devel-
oper roll (part of developer
cartridge), transfer belt
assembly
Action
Photoconductor unit is defective. Replace photoconductor unit.
Action
Ensure fuser has been properly installed. If so, replace fuser.
Replace LVPS. Go to "Low volt power supply (LVPS) removal" on
page 4-38.
Action
Reseat developer cartidge.
Action
Keep running prints through and the problem normally clears up. If
the problem persists, replace developer cartridge.
Action
Photoconductor unit is defective. Replace photoconductor unit.
If replacing the photoconductor unit does not fix the problem, replace
the developer cartridge.
Action
Check for loose or foreign material that might be on the photoconduc-
tor unit. Check for loose or foreign material that might be on the
developer roll. Check the transfer belt assembly for any pieces of
material that are stuck to the belt.
5022-xxx
2-71
Diagnostic information