Press the main power switch [A] on the left side of the machine.
IM 550F/600F/600SRF P 800/801 
The shutdown message appears. After the shutdown process, the main power is turned off automatically. The LED on the operation panel is turned off when the machine completes the shutdown.
MF models: Even after the shutdown message disappears, do not disconnect the power cord while the main power indicator [A] is flashing to indicate that the machine is still shutting down.
Before attempting to remove or adjust any boards, follow the procedure below to obviate the need for replacing the board which may get damaged by the residual charge.
- After shutdown, unplug the power cord.
- Press and hold the power button for a second to discharge the residual charge.
How to start from shutdown
To start the machine, press the main power switch. However, if you press the main power switch between the beginning and the end of a shutdown, the machine will not start.