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Verify that the drum and toner cartridge are installed
properly.
Remove the drum cartridge and clean the contacts on
the toner cartridge inside the unit. If the problem
persists, replace the drum.
Replace the drum cartridge.
Replace the print head unit.
Replace the high voltage power supply.
Replace the printer mechanical controller
Replace the printer interface pcb.
Replace the main control board.
Printout too light
Remove the Toner Cartridge and shake it a few times
to redistribute the toner inside.
Remove the drum cartridge and clean the contacts on
the toner cartridge inside the unit. If the problem
persists, replace the drum.
Verify that a clear image is being placed on the drum
by printing a document and opening the printer cover
before the document completes printing. At this point
remove the drum and check for a clear image on
the drum. If there is a clear image on the drum, the
problem could be caused by poor image transfer.
Replace the image transfer unit and/or the high voltage
power supply and/or the printer mechanical controller
and/or the main control board.
Printout too dark Remove the Toner Cartridge and shake it a few times
to redistribute the toner inside. If the problem persists,
replace the Toner Cartridge.
Verify operation of the drum unit.
Verify that a clear image is being placed on the drum
by printing a document and opening the printer cover
before the document completes printing. At this point
remove the drum and check for a clear image on
the drum. If there is a clear image on the drum, the
problem could be caused by poor image transfer.
Replace the image transfer unit and/or the high voltage
power supply and/or the main control board and/or the
printer mechanical controller.
Blurred background
Insure the drum and toner cartridge are installed
correctly.
Replace drum cartridge.
Remove the toner cartridge and clean the contacts on
the toner cartridge and inside the unit. If the problem
persists replace the toner cartridge.
Replace the high voltage power supply.
Replace the printer mechanical controller pcb.
Replace the main control board.