Brother 4000CN - Manual (Page 167)

8-21
1.
On the printer's right side, press the
side of the power switch marked [O] to
turn off the printer.
2.
Disconnect the power cord, interface
cable, and any other cables.
Never touch a power cord with wet hands.
This constitutes an electric shock hazard.
When unplugging the printer, grasp the plug
instead of the power cord. Forcibly pulling the
power cord can damage it and cause fire or
electric shocks.
3.
Gently pull out the paper tray until it
stops.
4.
Hold the tray with both hands, lift the
front slightly and pull it completely out
of the printer.