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Casio WK-240 - Circuit Description

Casio WK-240
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WK-240
– 5 –
CIRCUIT DESCRIPTION
Y
Nomenclature of Keys
E1 C2 C3 C4 C5 C6 C7 G7
Y
Key Matrix
Each key has two contacts, the rst contact
and second contact
.
[NOTE] The diagram below illustrates how the contacts work.
Key
Second contact
First contact
FI
KC
SI
KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7
FI0 E1
F1
F1#
G1
G1#
A1
A1#
SI0 E1
F1
F1#
G1
G1#
A1
A1#
FI1 B1
C2
C2#
D2
D2#
E2
F2
F2#
SI1 B1
C2
C2#
D2
D2#
E2
F2
F2#
FI2 G2
G2#
A2
A2#
B2
C3
C3#
D3
SI2 G2
G2#
A2
A2#
B2
C3
C3#
D3
FI3 D3#
E3
F3
F3#
G3
G3#
A3
A3#
SI3 D3#
E3
F3
F3#
G3
G3#
A3
A3#
FI4 B3
C4
C4#
D4
D4#
E4
F4
F4#
SI4 B3
C4
C4#
D4
D4#
E4
F4
F4#
FI5 G4
G4#
A4
A4#
B4
C5
C5#
D5
SI5 G4
G4#
A4
A4#
B4
C5
C5#
D5
FI6 D5#
E5
F5
F5#
G5
G5#
A5
A5#
SI6 D5#
E5
F5
F5#
G5
G5#
A5
A5#
FI7 B5
C6
C6#
D6
D6#
E6
F6
F6#
SI7 B5
C6
C6#
D6
D6#
E6
F6
F6#
FI8 G6
G6#
A6
A6#
B6
C7
C7#
D7
SI8 G6
G6#
A6
A6#
B6
C7
C7#
D7
FI9 D7#
E7
F7
F7#
G7
SI9 D7#
E7
F7
F7#
G7

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