JP-8000: Initializing the JP-8000 - Restoring the Factory Settings
The following procedure can be used to 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.)
1) Press #7 while holding SHIFT.
2) Press the #7 button repeatedly to select "INITIALIZE."
3) Use the UP and DOWN buttons to select "FACTORY PRESET."
4) Press the WRITE button.