Yamaha PX10 Reference Manual page 36

 To initialize all the user data
1.
Turn on while pressing the [A] key.
2.
Rotate the main knob to select "ALL" and press the main knob.
NOTE
• User data are parameters set in the CONFIG WIZARD, AMP PRESET, TUNING, and UTILITY
screens. For parameters, refer to "Function list" (page
• PIN code is also initialized.
37).
 To initialize all the user data and speaker preset
Turn on while pressing the [B] key and the [
confirm the initialization do not appear.
NOTE
The operation log is not deleted.
Panel Operation — Initializing the PX amplifier
] (back) key simultaneously. Screens to
PX10/PX8/PX5/PX3 Reference Manual
36