CASIO M200 Service Manual
M-200
INDEX
(without price)
M-200
ELECTRIONIC KEYBOARD
CONTENTS
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
IC and Transistor Lead Identification . . . . . . . . . . . . . . . . . . . . . . . . 6
PCB View and Major Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Schematic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
SPECIFICATIONS
General
Number of Keys: 32
Polyphonic: 4-note
Preset Tones: 25
Tone Edit Variations: 4
Patterns: Auto-Rhythms: 8, including; 8-Beat, 16-Beat, Swing, Slow Rock, Shuffle,
March, Samba, Waltz
Accompaniments: 8, including; Rock, Pops, Jazz, Funk, House, Country,
Ratin, Classical
Funny Sounds: 8, including; Fanfare, Hpper, Computer Sound, Horror,
Child's Play, Orient, Jungle, Comedy
Demonstration Tunes: 10 tunes with Lesson Function
1. Twinkle Twinkle Little Star 6. Home, Sweet Home
2. Minuet (J.S. Bach) 7. Little Brown Jug
3. Oh! Susanna 8. The Skaters Waltz
4. Aura Lee 9. Jingle Bells
5. Lullaby (Brahms) 10. When The Saints Go Marching In
Built-In Speakers: 8.0 cm dia. 1.0 W Input Rating: 2 pcs.
Terminals: Output Jack [Output Impedance:100 Ω, Output Voltage: 2.1 V (rms) MAX]
AC Adapter Jack (DV 7.5 V)
Power Source: DC: 5 AA size dry batteries
Battery life: Approx. 6 hours (SUM-3/R6P)
AC: AC Adapter AD-1
Power Consumption: 1.6 W
Dimensions (HWD): 57 x 619 x 178 mm
(2-1/4 x 24-3/8 x 6 inches)
Weight: 1.1 kg (2.4 lbs) including batteries
Electrical
Current Drain with 7.5 V DC:
No Sound Output 28 mA ± 20%
Maximum Volume 90 mA ± 20%
with keys C4 and E4 pressed in Flute tone
Volume: Maximum, Accmpaniment: Latin,
Tempo: Maximum
Sound Pressure Level at 10 cm away from the speaker 100 dB ± 10 dB
with key C6 pressed in Clarinet, Volume: Maximum
Minimum Operating Voltage: 5.0 V
— 1 —
Output Jack
BLOCK DIAGRAM
KO0~KO6
CPU
Amplifier
AN8053N
IC1
Speakers
Nomenclature of Keys
VDD
Filter
T1
MSM6387-16
KI0~KI7
LSI1
Keyboard
Switches
Oscillator
X1
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 —
CIRCUIT DESCRIPTION
Key Matrix
KI0 KI1 KI2 KI3 KI4 KI5 KI6 KI7
KO0 F3 F#3 G3 G#3 A3 A#3 B3 C4
KO1 C#4 D4 D#4 E4 F4 F#4 G4 G#4
KO2 A4 A#4 B4 C5 C#5 D5 D#5 E5
KO3 F5 F#5 G5 G#5 A5 A#5 B5 C6
KO4 Keyboard Wind String Synth S.E. Tone Edit
KO5 Rhythm Accomp. Stop
KO6 Lesson MelodyOff Demo
CPU (LSI1: MSM6387-16)
Containing a sound data ROM and a DAC (Digital to Analog Convertor), the CPU provides sound waveform in accordance with the pressed key and the selected tone.
The following table shows the pin functions of LSI1.
Pin No. Terminal In/ Out Function
1, 2 TEST1, TEST2 Not used. Connected to ground.
3 RESET In Power ON reset input. On: +6 V Off: 0 V
4 AVDD In +5 V sorce for the built-in DAC
5 OUT Out Sound waveform output
6 AGND In Ground (0 V) source for the built-in DAC
7 GND In Ground (0 V) source
8, 9 COSI, COSO In/Out 21.725 MHz clock pulse input/output
10 VDD In +5 V source
11 ~ 18 KI0 ~ KI7 In Input terminal from keys and switches
19 ~ 22 KO11 ~ KO8 Not used.
23 ~ 30 KO7 ~ KO0 Out Key and switch scan signal output
Funny
Accomp.
Tempo
Up
Volume
Up
Tempo
Down
Volume
Down
— 3 —
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