You can restore the factory settings of the DP-990F by performing a factory reset.
Note: Executing this function does not erase the songs in internal memory or on a USB flash drive (sold separately). If you want to erase all songs from internal memory or from a USB flash drive, refer to “Initializing the Memory” in the DP-990F Owner's Manual.
- While holding down the Key Touch button, press the Transpose button.
- Press the "Right" button to show "Fct" in the display.
- Press the flashing Play/Stop button to display "Sur."
- Press the flashing Rec button to confirm the Factory Reset.
NOTE: The factory reset will begin. Never turn off the power while the display flashes "Fct." When the factory reset has been completed, the display will show "END." - When the display shows "END" turn the power off, then on again.
NOTE: Never turn off the power during a Factory Reset. This may result in corrupted internal data and may prevent the power from being turned on again.