![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Open door A.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Open the front door.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Remove the used imaging unit.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Unpack the new imaging unit, and then remove all the packing material.
Warning—Potential Damage: Do not expose the imaging unit to direct light for more than 10 minutes. Extended exposure to light may cause print quality problems.
Warning—Potential Damage: Do not touch the photoconductor drum. Doing so may affect the quality of future print jobs.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Insert the new imaging unit, and then lock it in place.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Remove the printhead wiper, and then clean the printhead lens.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Put the printhead wiper back into place, and then close the front door.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Close door A.