Casio CTK-4200 Service Manual page 26

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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.
0F
05
06
07
0C
0D
10
0E
11
– 24 –
START
26
25
22
08
09
21
0B 0A
00
01
02
04
12
13
14
CTK-4200
1C
1D
1E
19
1A
1B
16
17
18
15
20
SW OK!
23
24
27

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