Heavy Background - Lexmark E330 Service Manual

Heavy background

Poor development or poorly charged toner particles cause excessive
background. This is more noticeable as the toner cartridge nears
end–of–life.
FRU
Toner cartridge (not a FRU)
PC Kit (not a FRU)
LVPS/HVPS
Controller card
Action
Make sure the toner cartridge and
PC Kit are correctly installed and the
high voltage contacts are clean.
If the toner cartridge and PC Kit are
installed correctly, try a new PC Kit
first and then toner cartridge.
Check the contacts for correct
installation and contamination where
contact is made between the print
cartridge assembly, and LVPS/HVPS
board. Clean as necessary.
If this does not correct the problem,
replace the following FRUs one at a
time in the order shown:
• LVPS/HVPS board
• Controller card
Diagnostic information
4505
2-69