Casio CTK-4200 Service Manual page 27

CTK-4200
A-3. When the "+" button is pressed at the end, a confirmation chord sounds and "1:SW OK!" is
displayed on the LCD.
A-4. Check to see if the LCD is as shown below.
A-5. Press the "0" button to return to the main screen.
B. AC ADAPTOR CHECK
B-1. Press the "3" button to select the "AC ADAPTOR CHECK".
B-2. Make sure that a value "XXX" shown in the illustration is in the range of 000 to 3FF.
B-3. Press the "3" button again.
B-4. Make sure that a value "XXX" shown in the illustration is in the range of 000 to 1FF.
B-5. Press the "0" button to return to the main screen.
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