Dell 5110cn Color Laser Printer - Manual (Page 333)

Removing the Wireless Printer Adaptor
Make sure that the printer is turned off and unplug all cables including the power cord from the rear of
the printer. 1.
Pull the paper tray cover so that the top edge tilts out and then lift the paper tray cover off its hinges. 2.
Remove the four screws on the controller card from the back side of the printer. 3.