Epson AcuLaser C2900N - Removing the Optional Duplex Unit

5. Close the control board cover, and turn the screw clockwise.
6. Turn on the printer.
Removing the Optional Duplex Unit
1. Turn off the printer and disconnect the power cord.
2. Push the side button to open the front cover.
Epson AcuLaser C2900 Series User’s Guide
Maintenance 230