Casio SA-65, Service Manual

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KI0 KI1 KI2 KI3 KI4 KI5 KI6 KI7
KO0 C3 C#3 D3 D#3 E3
KO1 F3 F#3 G3 G#3 A3 A#3 B3 C4
KO2 C#4 D4 D#4 E4 F4 F#4 G4 G#4
KO3 A4 A#4 B4 C5 C#5 D5 D#5 E5
KO4 F5 F#5 G5 G#5 A5 A#5 B5 C6
KO5 0 1 2 3 4
Tempo Melody
Up Off
KO6 5 6 7 8 9
Volume Tempo
Up Down
KO7
Song
Pattern Tone
Start/ Volume
Bank Stop Down
BLOCK DIAGRAM
CIRCUIT DESCRIPTION
Key Matrix
KO0 ~ KO7
KI0 ~ KI7
Keyboard
Switches
Oscillator
Q102, X101
CPU
MSM6387B-A28
LSI101
Amplifier
AN8053N
IC101
Speaker
VDD
KO8 ~ KO11
COM1, COM2
Q101
Filter
S1 ~ S14
S18 ~ S20
S31 ~ S46
OUT
LCD Driver
KS0035
IC102
LCD