Follow these steps to replace the Imaging Unit on your laser printer:

1. Turn off the printer and unplug the power cable.
2. Open the cartridge door to access the imaging unit.
3. Gently remove used imaging unit. If necessary, remove and discard any pieces of tape.
4. Carefully remove the new imaging unit from its packaging and note the orientation of the imaging unit. The arrows on the sides of the unit should match the arrows in the slot it fits into.
5. Insert the new imaging unit far enough in the slot to be held in place by the imaging unit latch.
6. Close the cartridge door, plug in the printer, and turn it back on.
7. Wait for the printer to recognize the imaging unit. There may be a few moments while the printer calibrates.
8. Print a test page to confirm that the imaging unit is working properly.