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

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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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Contents CTK-230 Contents Specifications LCD DB4~DB7 APO Block DiagramCircuit Description Main PCB CMW277-MAIN Printed Circuit BoardsJack PCB DisassemblyDiagnostic Program LCD check AC Adaptor checkAPO check Main PCB CMW277-MAIM Schematic DiagramsKeyboard PCBs JCM4911K-KY1M/KY2M Exploded View Parts List Accessory Overseas Service Division