Lexmark T520 - 20ppm 8MB Par USB Pcl6 Ps3 Ppds Service Manual page 126

4520-xxx
Print Quality - Residual Image
Service Tip: Install a new print cartridge if available before doing this
service check. Residual image can be caused by the
photoconductor, cleaning blade and other parts inside the print
cartridge.
FRU
1 Hot Roll Fuser Assembly
Print Quality - Light Print
Service Tip: Check the toner saver and print darkness settings first if
the print is light.
FRU
1 Transfer Roll
2 Right Side Transfer Roll
Arm Assembly
HVPS
3 Printhead
2-98
Service Manual
Action
Check the fuser assembly for signs
of toner contamination. The hot roll
especially might cause toner to be
retained and deposited on the page.
Action
Check the right end of the transfer
roll shaft for signs of wear or
contamination. If incorrect, replace
the transfer roll.
Check the right side transfer roll arm
assembly bearing for any signs of
wear or contamination. Also check to
ensure the transfer cable is firmly
attached to the bearing. If incorrect,
replace the right side transfer arm
assembly. Check the connection of
the transfer roll assembly cable to
the transformer on the HVPS board.
Check the continuity of the cable
from the bearing to the spade
terminal on the cable. If incorrect,
replace the right side transfer arm
assembly. If correct, replace the
HVPS.
A contaminated printhead may be
the cause of light print. If no other
cause is found, install a new
printhead.