Casio CTK-480 User Manual download pdf (Page 4)

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CIRCUIT DESCRIPTION

KEY MATRIX

KI0 KI1 KI2 KI3 KI4 KI5 KI6 KI7

KO0 C1 G#1 E2 C3 G#3 E4 C5 G#5

KO1 C#1 A1 F2 C#3 A3 F4 C#5 A5

KO2 D1 A#1 F#2 D3 A#3 F#4 D5 A#5

KO3 D#1 B1 G2 D#3 B3 G4 D#5 B5

KO4 E1 C2 G#2 E3 C4 G#4 E5 C6

KO5 F1 C#2 A2 F3 C#4 A4 F5

KO6 F#1 D2 A#2 F#3 D4 A#4 F#5

KO7 G1 D#2 B2 G3 D#4 B4 G5

KO8 0 1 2 3 4 Start/Stop

Tempo

Volume

KO9 56789

Tempo

Down

Volume

Down

Synchro/

Fill-In

K10 Tone Rhythm

Song

Bank

Melody

On/Off

K11 Fingered

CONCERT

Chord

Normal Power Off

NOMENCLATURE OF KEYS

F#3 G#3

A#3 C#4 D#4

F#4 G#4

A#4

C#5

D#5

F#5 G#5

A#5

F3 G3 A3 B3 C4 D4 E4 F4 G4 A4 B4 C5 D5 E5 F5 G5 A5 B5

D#3

C2 D2

A2 B2 C3 D3

B6A6G6F6E6D6

C#3A#2G#2

F#2D#2

C#2

A#6

G#6F#6D#6

C#6

1 2 3 4 5 6 7 8 9 ... 15 16

ELECTRIONIC KEYBOARD 1
ELECTRICAL 2
CONTENTS 2
SPECIFICATIONS 2
BLOCK DIAGRAM 3
CIRCUIT DESCRIPTION 4
CPU (LSI101: MSM6755B-06) 5
FILTER BLOCK 5
LED DRIVING 6
INITIAL RESET CIRCUIT 7
TROUBLESHOOTING 7
MAJOR WAVEFORMS 8
SCHEMATIC DIAGRAMS 9
PRINTED CIRCUIT BOARDS 11
Main PCB KDM440-MA1M 11
Console PCB KDM6111K-KY1M 11
Console PCB KDM6111K-KY2M 11
EXPLODED VIEW 13
MA0600761A 16

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Casio CTK-480 User Manual Page 4

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