Follow the steps below to replace the belt 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 all of the toner cartridge and drum unit assemblies.
   
   

   

   
   
4. Hold the green handle of the belt unit and lift the belt unit up, and then pull it out.
   
   

   

   
   
5. Unpack the new belt unit and install the new belt unit in the machine.
   
   

   

   
   
6. Slide each toner cartridge and drum unit assembly into the machine. Make sure that you match the toner cartridge color to the same color label on the machine. Repeat this step for each of the toner cartridge and drum unit assemblies.
   
   

   

   
   

   

   
   
7. Close the top cover of the machine.
   
   

   

   
   
   

When you replace the belt unit with a new one, you must reset the belt unit 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 Belt Unit. Press OK.
   
   
3. Press the Up arrow key for Reset to reset the belt unit counter.