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Circuit Description - Casio CTK-710 Service Manual

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KEY MATRIX
KC0
FI0
C21
SI0
C22
FI1
G#21
SI1
G#22
FI2
E31
SI2
E32
FI3
C41
SI3
C42
FI4
G#41
SI4
G#42
FI5
E51
SI5
E52
FI6
C61
SI6
C62
FI7
G#61
SI7
G#62
NOMENCLATURE OF KEYS
C#2
D#2
F#2
G#2
A#2
C2 D2
E2
F2
G2 A2
B2
BUTTON MATRIX
KC0
KI0
SETTING
KI1
TONE
KI2
SONG BANK
FI8
FILL-IN/REW
FI9
START/STOP

CIRCUIT DESCRIPTION

KC1
KC2
C#21
D21
C#22
D22
A21
A#21
A22
A#22
F31
F#31
F32
F#32
C#41
D41
C#42
D42
A41
A#41
A42
A#42
F51
F#51
F52
F#52
C#61
D61
C#62
D62
A61
A#61
A62
A#62
C#3
D#3
F#3 G#3 A#3
C#4 D#4
C3 D3
E3
F3
G3 A3
B3 C4
KC1
TEMPO DOWN
RHYTHM
PIANO BANK
SYNCRO/FF
TEMPO UP
KC3
KC4
D#21
E21
D#22
E22
B21
C31
B22
C32
G31
G#31
G32
G#32
D#41
E41
D#42
E42
B41
C51
B42
C52
G51
G#51
G52
G#52
D#61
E61
D#62
E62
B61
C71
B62
C72
F#4 G#4 A#4
C#5 D#5
D4 E4
F4
G4
A4
B4 C5 D5
KC2
KC3
STEP 3
2
LEFT
3
SYSTEM
RIGHT
STEP 1
0
STEP 2
1
— 4 —
KC5
KC6
F21
F#21
F22
F#22
C#31
D31
C#32
D32
A31
A#31
A32
A#32
F41
F#41
F42
F#42
C#51
D51
C#52
D52
A51
A#51
A52
A#52
F61
F#61
F62
F#62
F#5 G#5 A#5
D#6
C#6
E5
F5
G5
A5
B5
C6
D6
E6
KC4
5
6
SPEAK
4
KC7
G21
G22
D#31
D#32
B31
B32
G41
G42
D#51
D#52
B51
B52
G61
G62
F#6
G#6
A#6
F6
G6
A6
B6
C7
KC5
8
9
+
7

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2006