Casio WK-3300, Service Manual

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CIRCUIT DESCRIPTION
KEY MATRIX
KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7
FI0 E1
1
F1
1
F#1
1
G1
1
G#1
1
A1
1
A#1
1
SI0 E1 2 F1 2 F#1 2 G1 2 G#1 2 A1 2 A#1 2
FI1 B1 1 C2 1 C#2 1 D2 1 D#2 1 E2 1 F2 1 F#2 1
SI1 B1
2
C2
2
C#2
2
D2
2
D#2
2
E2
2
F2
2
F#2
2
FI2 G2
1
G#2
1
A2
1
A#2
1
B2
1
C3
1
C#3
1
D3
1
SI2 G2 2 G#2 2 A2 2 A#2 2 B2 2 C3 2 C#3 2 D3 2
FI3 D#3 1 E3 1 F3 1 F#3 1 G3 1 G#3 1 A3 1 A#3 1
SI3 D#3
2
E3
2
F3
2
F#3
2
G3
2
G#3
2
A3
2
A#3
2
FI4 B3
1
C4
1
C#4
1
D4
1
D#4
1
E4
1
F4
1
F#4
1
SI4 B3 2 C4 2 C#4 2 D4 2 D#4 2 E4 2 F4 2 F#4 2
FI5 G4 1 G#4 1 A4 1 A#4 1 B4 1 C5 1 C#5 1 D5 1
SI5 G4
2
G#4
2
A4
2
A#4
2
B4
2
C5
2
C#5
2
D5
2
FI6 D#5
1
E5
1
F5
1
F#5
1
G5
1
G#5
1
A5
1
A#5
1
SI6 D#5 2 E5 2 F5 2 F#5 2 G5 2 G#5 2 A5 2 A#5 2
FI7 B5 1 C6 1 C#6 1 D6 1 D#6 1 E6 1 F6 1 F#6 1
SI7 B5
2
C6
2
C#6
2
D6
2
D#6
2
E6
2
F6
2
F#6
2
FI8 G6
1
G#6
1
A6
1
A#6
1
B6
1
C7
1
C#7
1
D7
1
SI8 G6 2 G#6 2 A6 2 A#6 2 B6 2 C7 2 C#7 2 D7 2
FI9 D#7 1 E7 1 F7 1 F#7 1 G7 1
SI9 D#7
2
E7
2
F7
2
F#7
2
G7
2
Note: Each key has two contacts, the first conatct 1 and second contact 2 .
Key
Second contact
First contact
FI
KC
SI
2
1
NOMENCLATURE OF KEYS
C2 C3 C4 C5 C6 C7 G7 E1