A) Turn off the printer power switch.
B) Press the front cover release button and then open the front cover.
C) Hold the green handle of the drum unit. Lift thedrum up &pull it out of the drum unit.
D) Hold the handle of the toner cartridge and pull it out of the drum unit.
E) Push to release the latches of the white corona wire cover and then open the cover.
F) Clean the corona wire inside the drum unit by gently sliding the green tab from left to right and right to left several times. BE SURE TO RETURN THE TAB TO THE HOME POSITION.
G) Close the corona wire cover (repeat stepsfor all cartridges which you change as required.
H) Unpack the replacement toner & rock gently from side to side 5 or 6 times to spread the toner evenly inside the cartridge.
I) Remove the protective cartridge.
J) Hold the cartridge by the handle and slide the toner cartridge into the drum unit. Make sure that you match the toner cartridge colour to the same colour label on the drum unit & make sure that you fold down the toner cartridge handle once the toner cartridge is in place . Repeat for all the toner cartridges.
K) Put the drum unit back in the machine. Close the front cover of the printer.
L) Turn on the machine power switch.