How to Clean the Printer Drum Unit and Corona Wire
Open the front cover. Note: You need to print the toner dot matrix checklist first (select “drum dot matrix printing” in the “Options” of the control panel), in order to understand the locations where the toner cartridge is not clean. Power off the device after printing Remove the toner cartridge and drum unit assembly from the machine. Press the green lock lever and remove the toner cartridge from the drum unit Turn the drum unit to the other side. Make sure that the gear of the drum unit is on the left. Locate the print on the print cartridge by the numbered mark next to the print cartridge roller. […]