Dell 2130cn - Color Laser Printer User Manual page 177

1. Ensure that the printer is turned off and all the cables are unplugged including the power cable from the rear of the printer.
2. Turn the screw on the control board cover in a counter-clockwise direction and open the cover.
3. Remove the control board cover.
NOTE: Take off the below edge of the control board cover by turning the control board cover on hinge in the above edge. Next, remove the control
board cover by pulling it from the printer.
4. Insert the network protocol adapter by aligning the two rectangular slots and the circular hole and ensure that it snaps into place.
NOTE: Take note of the orientation of the network protocol adaptor. Ensure that the network protocol adapter is firmly fixed in the connector.
5. Install the control board cover.
NOTE: Insert the above hinge of the control board cover into the above slit on the printer. Next, insert the below hinge of the control board cover
into the below slit on the printer.
6. Close the control board cover and turn the screw clockwise.