Lexmark 4021 User Manual page 22

Additional printer setup
1
Remove the connector cover.
2
Remove the screws from the controller board access cover.
3
Remove the access cover.
4
Use the following illustration to locate the appropriate connector:
Warning—Potential Damage: Controller board electronic components are easily damaged by static
electricity. Touch a metal surface on the printer before touching any controller board electronic
components or connectors.
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