Circuit Description; Key Matrix - Casio CTK-480 Service Manual

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KEY MATRIX

KI0
KO0
C1
KO1
C#1
KO2
D1
KO3
D#1
KO4
E1
KO5
F1
KO6
F#1
KO7
G1
KO8
0
KO9
5
K10
Tone
K11
NOMENCLATURE OF KEYS
C#2
D#2
F#2
G#2
A#2
C#3
E2
G2 A2
C2 D2
F2
B2
C3 D3

CIRCUIT DESCRIPTION

KI1
KI2
G#1
E2
A1
F2
A#1
F#2
B1
G2
C2
G#2
C#2
A2
D2
A#2
D#2
B2
1
2
6
7
Song
Melody
Rhythm
Bank
On/Off
D#3
F#3 G#3 A#3
C#4 D#4
E3
F3
G3 A3
B3 C4
D4 E4
KI3
KI4
C3
G#3
C#3
A3
D3
A#3
D#3
B3
E3
C4
G#4
F3
C#4
F#3
D4
G3
D#4
3
4
Start/Stop
Tempo
8
9
Down
CONCERT
Fingered
Chord
F#4 G#4 A#4
C#5 D#5
F#5 G#5 A#5
F4
G4
A4
B4 C5 D5
E5
F5
— 4 —
KI5
KI6
E4
C5
G#5
F4
C#5
F#4
D5
A#5
G4
D#5
E5
A4
F5
A#4
F#5
B4
G5
Tempo
Volume
Up
Volume
Synchro/
Down
Fill-In
Normal
Power Off
C#6
D#6
F#6
G#6
C6
D6
E6
F6
G6
G5
A5
B5
KI7
A5
B5
C6
Up
A#6
A6
B6
C7

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