Samsung MultiXpress M537x series Basic Manual page 201

Replacing the imaging unit
3 Open the inner cover and pull the corresponding imaging unit out from
the machine.
4 Remove the new imaging unit from its package.
Do not use sharp objects, such as a knife or scissors, to open the imaging
unit package. You could damage the surface of the imaging unit.
5 Remove the sheet protecting the surface of the imaging unit.
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9. Troubleshooting
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