Kawai CA840 Owner's Manual page 28

El Tuning
Make sure that the piano is in the programming mode.
song 1———- 2 3-5 A T
ae ae
CA840 and CA640 Boe he
Each push of the key will change the tuning 1.56 cents.
Leave the programming mode by pressing the CHORUS button.
Momentarily turning off the power restores the original pitch.
— 24 —