Follow the procedure below to replace drum unit.

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?"

1. Press the cover release button and then open the front cover of the printer.
   
2. Pull out the drum unit assembly.
   

    

   • We recommend that you place the drum unit assembly on a piece of disposable paper or cloth in case you accidentally spill or scatter toner.
   • To prevent damage to the printer from static electricity, do not touch the electrodes shown below.
    
   
3. Push down the blue lock lever and take the toner cartridge out of the drum unit assembly.
   
4. Unpack the new drum unit.
   
   

   Wait to unpack a drum unit until immediately before you put it in the printer. Exposure to direct sunlight or room light may damage the drum unit.

    
5. Put the toner cartridge in the new drum unit until you hear it lock into place with a click. If you put the cartridge in properly, the blue lock lever is lifted automatically.
   
   

   Make sure you install the toner cartridge properly, or it may separate from the drum when you pick up the drum unit.

    
   
6. Put the drum unit assembly in the printer.
   Make sure that the printer is turned on, the front cover is open and the Status LED is red.
   
7. Reset the drum counter. See the instructions supplied with the new drum unit. To see how to reset the drum counter, click here.
   
   

   The Drum LED indication does not disappear until you reset the drum counter.
   Do not reset the drum counter when you replace only the toner cartridge.

    
8. Close the front cover.
    
9. Make sure that the Drum LED is now off.