Casio CTK-1100 Service Manual & Parts Manual page 20

BA BUTTON CHECK
B-1. Press the "0" button to select the "Button Check".
B-(. Press the button in the order indicated in the illustration below.
Each time the button is pressed, the confirmation chord sounds.
If a button is not operating properly or a button is pressed in a wrong order, an error tone sounds
and "NG" appears on the LCD.
NOTEN You cannot cancel this check procedure mid-way.
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B-(. When the "CHORD" button is pressed at the end, the confirmation chord sounds and "SWIT OK"
appears on the LCD.
CA ROM VERSION CHECK
C-1. Press the "1" button to perform the "ROM Version Check".
The ROM version appears on the LCD.
C-(. Check that the ROM version is "8(0vr100".
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