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Synthesizer
Celviano AP-40
Service manual
Circuit Description - Casio AP-40 Service Manual
88 piano keys
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:
User manual
(21 pages)
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KEYMATRIX
Second contact
KC0
1
FI0
A0
SI0
A0
2
1
EI1
F1
SI1
F1
2
C2 # 1
FI2
2
SI2
C2 #
A2 1
FI3
A2 2
SI3
FI4
F3 1
F3 2
SI4
FI5
C4 # 1
C4 # 2
SI5
FI6
A4 1
A4 2
SI6
F5 1
FI7
SI7
F5 2
C6 # 1
FI8
C6 # 2
SI8
A6 1
FI9
A6 2
SI9
FI10
F7 1
F7 2
SI10
CIRCUIT DESCRIPTION
First contact
KC1
KC2
1
1
A0 #
B0
A0 #
2
B0
2
1
1
F1 #
G1
F1 #
2
G1
2
1
1
D2
D2 #
2
2
D2
D2 #
1
1
A2 #
B2
2
2
A2 #
B2
F3 #
1
G3
1
2
2
F3 #
G3
D4
1
D4 #
1
2
2
D4
D4 #
A4 #
1
B4
1
2
2
A4 #
B4
1
1
F5 #
G5
F5 #
2
G5
2
1
1
D6
D6 #
2
2
D6
D6 #
1
1
A6 #
B6
2
2
A6 #
B6
F7 #
1
G7
1
2
2
F7 #
G7
FI
KC
HG52E35P
SI
KC3
KC4
1
1
C1
C1 #
C1
2
C1 #
2
1
1
G1 #
A1
G1 #
2
A1
2
1
1
E2
F2
2
2
E2
F2
1
1
C3
C3 #
2
2
C3
C3 #
G3 #
1
A3
1
2
2
G3 #
A3
E4
1
F4
1
2
2
E4
F4
C5
1
C5 #
1
2
2
C5
C5 #
1
1
G5 #
A5
G5 #
2
A5
2
1
1
E6
F6
2
2
E6
F6
1
1
C7
C7 #
2
2
C7
C7 #
G7 #
1
A7
1
2
2
G7 #
A7
— 8 —
LSI
KC5
KC6
1
1
D1
D1 #
D1
2
D1 #
2
1
1
A1 #
B1
A1 #
2
B1
2
1
1
F2 #
G2
2
2
F2 #
G2
1
1
D3
D3 #
2
2
D3
D3 #
A3 #
1
B3
1
2
2
A3 #
B3
F4 #
1
G4
1
2
2
F4 #
G4
D5
1
D5 #
1
2
2
D5
D5 #
1
1
A5 #
B5
A5 #
2
B5
2
1
1
F6 #
G6
2
2
F6 #
G6
1
1
D7
D7 #
2
2
D7
D7 #
A7 #
1
B7
1
2
2
A7 #
B7
KC7
1
E1
E1
2
1
C2
C2
2
1
G2 #
2
G2 #
1
E3
2
E3
C4
1
2
C4
G4 #
1
2
G4 #
E5
1
2
E5
1
C6
C6
2
1
G6 #
2
G6 #
1
E7
2
E7
C8
1
2
C8
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