Auto Sleep Time

If the machine is idle for a certain period of time (after the key operation is performed), the machine automatically enters the Sleep mode to save power.
Press (Settings/Registration).
Press [Preferences] → [Timer/Energy Settings] → [Auto Sleep Time].
Press  or  to specify the desired Auto Sleep Time → press [OK].

The default setting is '5' minutes.
It is recommended that you use the default setting for this item. However, if you set priority is given to productivity when copying/printing, set the value in this mode to '0'. If you set to '0', press  to set the machine to enter the Sleep mode or the Energy Saver mode.