6. LCD check

1Press “TONE” button.

2Press “TONE” button.

*Pip sound must be audible.

The display must be changed to turn on all dots.

3Press “TONE” button.

The display must be changed to no display.

4Press “TONE” button.

The display must be changed to pattern 1 dot matrix.

5Press “TONE” button.

The display must be changed to pattern 2 dot matrix.

6Press “TONE” button.

The display must be changed to pattern 1 characters.

7Press “TONE” button.

The display must be changed to pattern 2 characters.

8Press “TONE” button.

The display must be changed to as remark.

7.AC Adaptor check

1Press “SONG BANK” button. OK sound must be audible.

8.APO check

1Press “STOP” button.

*Go out from TEST mode (Power off).

*The LCD turns off.

DIAGNOSTIC PROGRAM IS FINISHED.

Message on LCD

LCD

TEST

P=AC ADP

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Casio CTK-230 Sep. 2003 manual LCD check, AC Adaptor check, APO check