Casio CTK-1100 Service Manual & Parts Manual page 22

D-6. Press the "TONE" button.
The confirmation chord sounds and the following screen appears on the LCD.
D-7. Press the "TONE" button.
The confirmation chord sounds and the following screen appears on the LCD.
EA AUTO POWER OFF CHECK
E-1. Press the "STOP" button to perform the "Auto Power Off Check".
E-(. The power supply is turned off and no screen appears on the LCD.
NOTEN After checking, be sure to turn the mode switch to "OFF".
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CTK-1100