The following procedure will clear the internal memory and reload the factory settings:
(CAUTION!!!!: All USER information will be lost!!! Be sure to back up any information you wish to keep!!!)
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.
- Turn on the JV-80 while holding the NUMBER 8 button.
- Once the unit has turned on, press ENTER.
Owner's Manual: https://www.roland.com/us/support/manual_archive/