Lexmark 4021 User Manual page 155

Maintaining the printer
4
Loosen the screws of the transfer module lock.
5
Remove the paper guide.
6
Lift the transfer module using the handles, and then pull it out completely.
7
Unpack the new transfer module.
Warning—Potential Damage: Do not expose the transfer belt to direct light for more than 10 minutes.
Extended exposure to light may cause print quality problems.
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