Casio PK-5 Service Manual

PK-5

INDEX

(without price)

ELECTRIONIC KEYBOARD

CONTENTS

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

PCB View and Major Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Schematic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

IC Lead Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Exploded Veiw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

SPECIFICATIONS

General

Number of Keys: 32
Polyphonic: 2-note
Preset Tones: 16
Auto-Rhythms: 19; Rock 1~2, 16 Beat 1~2, Disco 1~3, Pops 1~3, Slow Rock, Swing

March, Reggae, Tango, Samba, Bossa Nova, Beguine, Waltz

Accompaniment Patterns: 13; Rock, Pops, Funk, Slow Rock, Latin, Jungle, Orient, Bagpiper,

Fanfare, Child's Play, Classical, Computer, New Age
Demonstration Tune: Classical Medley
Built-In Speaker: 6.5 cm dia. 0.5 W Input Rating: 1 pec.
Power Source: 4 AA size dry batteries

Battery life: Approx. 3 hours (SUM-3/R6P)

Approx. 6 hours (AM-3/LR6)
Power Consumption: 0.7 W
Dimentions: 41 x 375 x 115 mm (HWD)

(1-5/8 x 14-3/4 x 4-1/2 inches) (HWD)

Weight: 0.4 kg (0.9 lbs) excluding batteries

Electrical

Current Drain with 6V DC:
No Sound Output 35 mA ± 20%
Maximum Volume 113 mA ± 20%

with keys C4 and E4 pressed in Flute tone

Volume: Maximum, Accmpaniment: Latin,

Tempo: Maximum

Minimum Operating Voltage: 5.0 V

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BLOCK DIAGRAM

CPU

KO0~KO6

Speaker

Amplifier

AN8053N

IC1

MSM6387-03

KI0~KI7

LSI1

Keyboard

Switches

Oscillator

X1

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 C6

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