Open the front cover.

   Rotate all print cartridges counter-clockwise and pull them out. Remove waste toner container from the machine.

   Pull the imaging unit out of the machine using the handle on its bottom.

   Extend the top handle on the imaging unit and then use it to pull the imaging unit out of the printer completely.

   Holding the handles on the new imaging unit, push the imaging unit until it sounds 'click' in to the machine.

   Remove four dummy caps which are on the print cartridge entrances of the imaging unit. When you remove the dummy cap from the cartridge, lift the handle up and pull it out.

   Insert the print cartridges and waste toner container back into their corresponding slots until they click into place. And rotate the print cartridges clockwise.

   Close the front cover firmly.