Lexmark E120 - Light Print; White or Black Lines or Bands

2-36 Service Manual
4506-1xx
Light print
White or black lines or bands
FRU Action
Toner cartridge (not a
FRU)
Print a menu page (press and release when the printer is in the ready state)
and check for the correct media type setting.
Check darkness in the printer driver.
Make sure the toner cartridge and PC kit are installed correctly and that the toner
cartridge is not low on toner.
If the problem continues, install a new toner cartridge.
Recheck the condition of the PC Kit before replacing it (if necessary).
Tr ans fe r ro l l
LVPS/HVPS board
Check the transfer roll for signs of toner buildup and contamination.
Inspect the HVPS contact (transfer roll) for contamination.
Verify the high voltage cable is plugged into the LVPS/HVPS.
If all components appear free of contamination, replace the following FRUs one
at a time in the order shown:
• Transfer roll
• LVPS/HVPS board
FRU Action
Toner cartridge
(not a FRU)
Banding appears as light or dark horizontal lines on a uniformly gray page or on
a page with a large area of graphics. Banding is primarily due to a variation in the
speed of the paper as it feeds through the printer, especially in the developer
and transfer process. It can also be a result of overly moist or dry environments.
Check to make sure the laser light is not blocked while the printer is turned off.
Inspect the toner cartridge, paper feed components, the drive coupler, and drive
gears for debris, binds, or damage. (The coupler retracts when the front door is
opened.) Close the door and inspect the previously mentioned areas from the
rear of the printer. Try a new ream of paper.
PC Kit (not a FRU) Check the charge roll for a discoloration pattern that matches the row pattern on
the pages. If the pattern is present, try a different PCU.