Epson AcuLaser CX16 User Manual page 204

2. Remove the tape affixed to the rear cover.
3. If the locking pins are installed on the left and right side at the back of Tray 2, remove them.
To remove a locking pin, turn it to either the left or the right so that its grip is vertical, and then pull
out the locking pin to remove it.
4. Prepare the duplex option.
AcuLaser CX16 Series Printer / Copier / Scanner User's Guide
Installing Accessories (AcuLaser CX16NF only) 204