Follow the procedure below to replace the drum unit.
 

1. Make sure that the machine is turned on.

2. Open the top cover until it locks in the open position.

    

   

    

3. Take out the toner cartridge and drum unit assembly for the colour shown on the LCD.

    

   

    

4. Push down the green lock lever and take the toner cartridge out of the drum unit.

    

   

    

5. Unpack the new drum unit.

6. Put the toner cartridge firmly into the new drum unit until you hear it lock into place. If you install the cartridge correctly, the green lock lever on the drum unit will lift automatically.

    

   

    

7. 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 () (1). The arrow on the tab must be aligned with the arrow on the drum unit. If it is not, printed pages may have a vertical stripe.

8. Repeat Step 3 and Step 7 to clean each of three remaining corona wires.

9. Slide the toner cartridge and drum unit assembly into the machine. Make sure you match the toner cartridge colour to the same colour label on the machine.

    

    

   

    

   

    

10. Close the top cover of the machine.

     

    

     

When you replace a drum unit with a new one, you must reset the drum counter by completing the following steps:

1. Press the Up arrow key while holding down Go on the machine's control panel.

2. Press the Up or Down arrow key to display Drum Unit. Press OK.

3. Press the Up or Down arrow key to display the colour of the drum unit that you replaced. Press OK.

4. Press the Up arrow key for Reset to reset the drum counter.