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.
   
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. While pressing the Lock lever, pull the Toner cartridge out of the Drum unit assembly.
   

   Handle the toner cartridge carefully. If toner scatters on your hands or clothes, wipe or wash it off with cold water immediately.

   • Discard the used Drum unit according to local regulations. Be sure to seal up the Drum unit tightly so that toner powder does not spill out of the unit.
   • Handle the Toner cartridge carefully. If toner scatters on your hands or clothes, immediately wipe or wash it off with cold water.
4. Unpack the new Drum unit.
   
   

   Wait to unpack a Drum unit until immediately before you install it in the printer. If an unpacked Drum unit is subjected to excessive direct sunlight or room light, the unit may be damaged.
5. Install the Toner cartridge into the new Drum unit until you hear it lock into place with a click. When the Toner cartridge is installed correctly, the lock lever is lifted automatically.
   

   Make sure you install the Toner cartridge correctly, or it may separate from the Drum unit when you pick up the Drum unit assembly.
6. Re-install the Drum unit assembly in the printer.
   
7. Reset the page counter referring to the instructions supplied with the new Drum unit. To see how to reset the drum counter, click here.
   
   

   Do not reset the page counter when you replace only the Toner cartridge.
8. Close the Front cover.
   
   

   We recommend that you clean the printer when you replace the Drum unit.