Casio CTK-2200, Service Manual, Page: 23 / 35

CTK-2200
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A-2. Press the button in the order indicated in the illustration.
NOTE: You cannot cancel this check procedure mid-way.
<If the result passes>
The confirmation chord sounds and “1:SW00XX” is displayed on the LCD with “XX” indicating the
corresponding button number in the illustration.
<If the result fails>
If there is a button failure or the buttons are pressed in a wrong sequence, an error tone sounds
and the button number which you pressed will be displayed on the LCD.
1F
03
00
02
0D 0A 0B 0E 0C 0F
SW OK!
16 15 14
19 18 17
12 11
1B
1A
10
01
04 05 06 07 1C
1E 1D 09 08
START