PCR-30, PCR-50, PCR-80: Initializing - 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 EDIT.
2. Press the SYSTEM key (Highest B key on the keyboard).
3. Press the #8 key (lowest D flat)('SY8' will show in the display).
4. Press ENTER three times.