You can restore the current settings registered in the machine to the factory defaults (
Setting Menu List).
Press

.
Use

/

to select <System Management Settings>, and press

.
Select <Initialize Menu>, and press

.
Select the item that you want to initialize, and press

.
Items for initializing
Select the setting that you want to initialize.
<Initialize All>
Initializes all the settings.
Select <Yes>, and press

.
Restart the machine if necessary.
Turn OFF the machine, wait for at least 10 seconds, and turn it back ON.