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
— 1 —
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
— 2 —
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