WARNING: All user stored data will be deleted. If the current settings and data are not expendable, create a backup before executing the Factory Reset. Reference: Owner's Manual, p.118
1) Turn the RY20 power off.
2) Press and hold the [+1] and [-1] buttons simultaneously while turning the power on. ''FACTORY SET'' will momentarily appear on the LCD display and the Record and Play LEDs will flash.
3) Release the [+1] and [-1] buttons.
NOTE: The ''YAMAHA RY20'' prompt will appear, then the instrument will default to Pattern Mode.