HL-4150CDN

The Brother machine has separate consumables the toner cartridge and the drum unit. Verify you replace only the drum unit and not the toner cartridge. If you want to know their difference, refer to "What is the difference between the toner cartridge and the drum unit?"

Replace the drum following the steps below:

1. Make sure that the machine is turned on. Press the front cover release button and then open the front cover.
   
   
   
   
   
   
   
   
   
   
   
   
   
2. Hold the green handle of the drum unit. Pull the drum unit out until it stops.
   
   
   
   
   
   
   
   
   
   
   
   
   
3. Turn the green lock lever (1) at the left of the machine counterclockwise to the release position. Holding the green handles of the drum unit, lift the front of the drum unit and remove it from the machine.
   
   
   
   
   
   
   
   
   
   
   
   
   
4. Hold the handle of the toner cartridge and slightly push it to unlock. Then pull it out of the drum unit. Repeat this for all the toner cartridges.
   
   
   
   
   
   
   
   
5. Unpack the new drum unit and remove the protective cover.
   
   
   
   
   
   
   
   
6. Hold the handle of the toner cartridge and slide it into the appropriate colored section of the drum unit until it clicks into place.
   
   
   
   
   
   
   
   
   
   
   
   
   C-Cyan M-Magenta Y-Yellow K-Black
   
   
7. Make sure the green lock lever (1) is in the release position as shown in the illustration.
   
   
   
   
   
   
   
   
8. Match the guide ends (2) of the drum unit to the right arrow marks (1) on both sides of the machine, then gently slide the drum unit into the machine until it stops at the green lock lever.
   
   
   
   
   
   
   
   
9. Turn the green lock lever (1) clockwise to the lock position.
   
   
   
   
   
   
   
   
10. Push the drum unit in until it stops.
    
    
    
    
    
    
    
    
    
    
    
    
11. Close the front cover of the machine.
    
    
    When you replace the drum unit with a new one, you need to reset the drum counter by completing the following steps:
    
    
    
    1. Press + or - to choose Machine Info. Press OK.
       
       
    2. Press + or - to choose Reset Parts Life. Press OK.
       
       
    3. Press + to choose Drum Unit. Press OK.
       
       
    4. Press + to reset the drum unit counter.