Block Diagram; Circuit Description - Casio MA-100 Service Manual

Amplifier
AN8053N
IC101
Speaker
Key Matrix
KI0
KO0 0
KO1 2
KO2 4
KO3 6
KO4 8
KO5 Tone
Tempo
KO6
Up
Start/
KO7
Stop
KO8 Demo
KO9

BLOCK DIAGRAM

Filter
Q101
VDD
AVDD

CIRCUIT DESCRIPTION

KI1 KI2
1 C2
3 F#2
5 C3
7 F#3
9 C4
Rhythm F#4
Tempo
C5
Down
Fill-In F#5
C6
— 3 —
KO0 ~ KO9
KO0 ~ KO8
KI0 ~
KI7
CPU
MSM6387-13
MSM6387- 22
LSI101
Oscillator
Q102, X101
KI3 KI4 KI5
C#2 D2 D#2
G2 G#2 A2
C#3 D3 D#3
G3 G#3 A3
C#4 D4 D#4
G4 G#4 A4
C#5 D5 D#5
G5 G#5 A5
Normal
Keyboard
Buttons
KI6 KI7
E2 F2
A#2 B2
E3 F3
A#3 B3
E4 F4
A#4 B4
E5 F5
A#5 B5
CASIO
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