NOTE: Difference between Toner Cartridge and Drum unit shown below.
1. Make sure the machine is turned on and open the front cover.
2. Remove the toner and drum assembly from the machine.
3. Push down the green lock lever and take the toner out of the drum.
4. Unpack the new drum unit.
5. Insert the toner in the drum.
Make sure you put the toner cartridge in correctly or it may separate from the drum unit.
6. Slide the green tab from left to right several times to clean the corona wire.
Be sure to return the tab to the Home position. If it isn't returned to the Home position, printed pages may have a vertical stripe.
7. Install the drum and toner assembly in the machine. Close the front cover.
8. Press 
Settings on the Touchscreen.
9. Press All Settings.
10. Press Machine Info.
11. Press ▲ or ▼ to display Parts Life. Press Parts Life.
12. Press and hold Drum.
13. Press Yes.
14. Press 
Home to exit the menu.
Do not reset the drum counter when you only replace the toner cartridge.
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