Circuit Description - Casio CDP-130 Service Manual & Parts Manual

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Y Nomenclature of Keys
A#0
C#1
D#1
F#1
G#1
A#1
C#2
A0 B0
C1 D1 E1 F1 G1 A1 B1
C2 D2 E2 F2 G2 A2 B2 C3 D3 E3
Y Key Matrix
Each key has two contacts, the fi rst contact
[NOTE] The diagram below illustrates how the contacts work.
Second contact
KC0
FI0
A0
SI0
A0
FI1
F1
SI1
F1
FI2
C2#
SI2
C2#
FI3
A2
SI3
A2
FI4
F3
SI4
F3
FI5
C4#
SI5
C4#
FI6
A4
SI6
A4

CIRCUIT DESCRIPTION

D#2
F#2
G#2
A#2
C#3
D#3
F#3G#3 A#3 C#4D#4
F3 G3 A3 B3 C4 D4 E4 F4 G4 A4 B4 C5 D5 E5 F5 G5 A5 B5 C6
Key
First contact
KC1
KC2
A0#
B0
A0#
B0
F1#
G1
F1#
G1
D2
D2#
D2
D2#
A2#
B2
A2#
B2
F3#
G3
F3#
G3
D4
D4#
D4
D4#
A4#
B4
A4#
B4
F#4G#4A#4
C#5D#5
F#5G#5A#5
and second contact
.
FI
KC
SI
KC3
KC4
C1
C1#
C1
C1#
G1#
A1
G1#
A1
E2
F2
E2
F2
C3
C3#
C3
C3#
G3#
A3
G3#
A3
E4
F4
E4
F4
C5
C5#
C5
C5#
– 4 –
CDP-130
C#6
D#6
F#6
G#6
A#6
C#7
D#7
F#7
D6
E6
F6
G6
A6
B6
C7
D7
E7
F7
KC5
KC6
D1
D1#
D1
D1#
A1#
B1
A1#
B1
F2#
G2
G2#
F2#
G2
G2#
D3
D3#
D3
D3#
A3#
B3
A3#
B3
F4#
G4
G4#
F4#
G4
G4#
D5
D5#
D5
D5#
G#7
A#7
G7
A7
B7
C8
KC7
E1
E1
C2
C2
E3
E3
C4
C4
E5
E5

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