Kawai CA17W Owner's Manual page 45

 Resetting the User Key Volume setting
Press the CONCERT MAGIC, LESSON, PLAY/STOP, and REC
buttons simultaneously.
The LED indicators for the CONCERT MAGIC, LESSON, PLAY/
STOP, and REC buttons will start to flash, and the volume values
of all 88 keys will be initialized.
 Exiting the User Key Volume setting
Turn the instrument's power off.
* This setting will be stored automatically, and recalled every time the instrument is turned on.
45