Circuit Description - Casio ap-24 Service Manual

KEY MATRIX
Second contact
KC0
FI0 A01
SI0 A02
FI1 F11
SI1 F12
FI2 C2#1
SI2 C2#2
FI3 A21
SI3 A22
FI4 F31
SI4 F32
FI5 C4#1
SI5 C4#2
FI6 A41
SI6 A42
FI7 F51
SI7 F52
FI8 C6#1
SI8 C6#2
FI9 A61
SI9 A62
FI10 F71
SI10 F72
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
BUTTON MATRIX
KI0
KC0 CONTROL
KC1 SPLIT
KC2 START/STOP

CIRCUIT DESCRIPTION

First contact
1
2
KC1 KC2
A0#1 B01
A0#2 B02
F1#1 G11
F1#2 G12
D21 D2#1
D22 D2#2
A2#1 B21
A2#2 B22
F3#1 G31
F3#2 G32
D41 D4#1
D42 D4#2
A4#1 B41
A4#2 B42
F5#1 G51
F5#2 G52
D61 D6#1
D62 D6#2
A6#1 B61
A6#2 B62
F7#1 G71
F7#2 G72
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
KI1
—
METRONOME
RECORD
FI
LSI (IC4)
KC
ML6763B-NNTC-116
SI
KC3 KC4
C11 C1#1
C12 C1#2
G1#1 A11 A1#1
G1#2 A12 A1#2
E21 F21 F2#1
E22 F22 F2#2
C31 C3#1
C32 C3#2
G3#1 A31 A3#1
G3#2 A32 A3#2
E41 F41 F4#1
E42 F42 F4#2
C51 C5#1
C52 C5#2
G5#1 A51 A5#1
G5#2 A52 A5#2
E61 F61 F6#1
E62 F62 F6#2
C71 C7#1
C72 C7#2
G7#1 A71 A7#1
G7#2 A72 A7#2
F#4G#4A#4 C#5D#5 F#5G#5A#5
— 3 —
KC5 KC6
D11 D1#1 E11
D12 D1#2 E12
B11 C21
B12 C22
G21 G2#1
G22 G2#2
D31 D3#1 E31
D32 D3#2 E32
B31 C41
B32 C42
G41 G4#1
G42 G4#2
D51 D5#1 E51
D52 D5#2 E52
B51 C61
B52 C62
G61 G6#1
G62 G6#2
D71 D7#1 E71
D72 D7#2 E72
B71 C81
B72 C82
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
KC7
G#7 A#7
G7 A7 B7 C8