Lexmark OptraTM Service Manual page 64

4026-0XX
Excessive Background
Note: Poor development or poorly charged toner particles causes
excessive background. This is more noticeable as the toner car-
tridge nears end of life.
FRU
Toner Car-
1
tridge, Photo-
conductor
Unit
White Spots
FRU
Transfer
1
Assembly
Light Print
FRU
1 Photoconduc-
tor Unit
2-42
Action
Be sure the toner cartridge and photoconductor
unit are installed correctly. If installed correctly,
try a new toner cartridge and then a new photo-
conductor unit. If a new toner cartridge or photo-
conductor unit does not correct the problem,
replace the following FRUs one at a time in the
order shown:
HVPS
Engine board
Action
Check the transfer assembly for any signs of
broken parts, pitting, contamination or foreign
objects attached to or in the area of the transfer
roll.
If no problem is found, replace the following
FRUs one at a time in the order shown:
Transfer Assembly
HVPS
Action
Be sure the photoconductor unit is correctly
installed. Check the cartridge for damage and
pitted or contaminated contacts. If no problem is
found, replace the photoconductor unit.