Casio M-300 User manual

ELECTRIONIC KEYBOARD

M-300

(with price)

— 2 —

CONTENTS

Specification ....................................................................2

Block Diagram .................................................................3

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

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

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

Exploded View.................................................................8

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

SPECIFICATIONS

General

Number of Keys: 32

Polyphonic: 4-note

Preset Tones: 8

Preset Effects: 6

Preset Phrases: 4

Demonstration Tunes: 6

Function Dial: Magical sound dial

Built-In Speaker: 8 cm dia. 1.0 W Input Rating: 1 pce.

Power Source: 5 AA size dry batteries

Battery life: approx. 6 hours (SUM-3/R6P)

Power Consumption: 1.5 W

Dimensions (HWD): 58 x 439 x 205 mm

(2-1/4 x 17-1/4 x 8-1/16 inches)

Weight: 0.99 kg (2.2 lbs) including batteries

Electrical

Current Drain with 7.5 V DC:

NoSound Output 33 mA +/-20%

Maximum Volume 170 mA +/-20%

with keys G3, A3, B3 and C4 pressed

in Street Organ tone, Volume; Maximum

Speaker output level at 4 Ωload: 640 mV +/-20%

with key C4 pressed in Street Organ tone

Volume; Maximum

Minimum Operating Voltage: 5.0 V

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

— 3 —

BLOCK DIAGRAM

CPU

MSM6387-22

LSI101

Amplifier

AN8053N

IC101

Speaker

Oscillator

Q102, X101

VDD

Keyboard

Buttons

Filter

Q101

KO0 ~ KO8

KI0 ~

KI7

AVDD

CIRCUIT DESCRIPTION

Key Matrix

Song 1: Twinkle Twinkle Little Stars Song 4: Old MacDONALD Had a Farm

Song 2: Pop Goes the Weasel Song 5: Clap Your hands

Song 3: Lullaby (Brahms) Song 6: O Christmas Tree

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 Music box Glass harp Piano Trumpet Flute Violin Woodbass

KO5 Train Car Quiz Cheer Animal

KO6 Stop Siren Horror Carnival Rap

KO7 Dial SW-A Dial SW-B Dial WS-C

KO8 Song 1 Song 2 Song 3 Song 4 Song 5 Song 6

Street

organ

Volume

Down Volume

Up Country

western

— 4 —

CPU (LSI101: MSM6387-22)

Containing a sound data ROM and a DAC (Digital to Analog Convertor), the CPU provides sound wave-

form in accodance with the pressed key and the selected tone.

The following table shows the pin functions of LSI101.

Amplifier/Voltage Regulator

(IC101: AN8053N)

The right figure shows the internal block of IC101.

AVDD

C108

Q101

2SC1740SQ

C107

R107

R2106

C106

C109

R105

R104

R108

To power amp

From CPU

16 15 14 13 12 11 10 9

SP AMP VREF

5V REG

POWER

SPO NC SP GND PC-1 PC-2 SPI SPM VREF

VCC NC CONT 5V

VREG NCNC NC PRE GND

Filter Block

Since the sound signal from the CPU is a stepped waveform, the filter block is added to smooth the

waveform.

Pin No. Terminal In/ Out Function

1, 2 TEST1, TEST2 Not used. Connected to ground.

3 RESET In Power ON reset terminal. On: +5 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 COSI In 21.725 MHz clock pulse input

9 COSO Not used

10 VDD In +5 V source

11 ~ 18 KI0 ~ KI7 In Input terminals from keys and switches

19, 20 KO11, KO10 Not used

21 ~ 30 KO9 ~ KO0 Out Key and switch scan signal outputs

— 5 —

1JCM547-MA1M A

MC101

R125

R126

R127

R115

R114

R113

R112

R111

R123

R119

R118

R117

R116

R120

R121

R122

R124

C114

R128

X101

R129

C115

Q102

C117

C116

LSI101

C111 R130

C110

R108

C109

R107

C108

R106

Q101

R110

D104

PZ-R

C107 C105

R104

C104

C102

125

D102

J101

L101

R101

D101

R105 C106

IC101

PS-Q

PS-BL

LED101

L102

C103

No.

R102

328

PZ-BK

75 D105

195

13 D112D111D110D109D108No. 3

D107D106D105

1JA

JCM547-MA1MA

PCB VIEW AND MAJOR WAVEFORMS

Tone: Flute

Key: A4

Volume: Maximum

˜˜˜˜

1Clock pulse COSI

MSM6387-22 pin 9 2Key scan signal KO0

MSM6387-22 pin 30

3Key scan signal KO1

MSM6387-22 pin 29

6Power amp input

AN8053N pin 6

7Power amp output

AN8053N pin 1

4Sound signal output

MSM6387-22 pin 5

5Filter output

Emitter of Q101

CH1

A 50ns

CH1 1V

Px10

A 2ms

CH1

CH2

CH1 5V CH2 5V

Px10 Px10

CH1 . 1V CH2 . 1V

CH1

CH2

A 2ms

Px10 Px10

CH1 . 1V CH2 . 5V

CH1

A 2ms

Px10 Px10

145

32 6 7

— 6 —

SCHEMATIC DIAGRAMS

0.9

2.2

0.3

5.0

6.8

4.8

2.6

1.9

— 7 —

— 8 —

EXPLODED VIEW

S-1

17-1

17-2

S-1

S-2

S-3

— 1 —

Notes: 1. Prices and specifications are subject to change with-

out prior notice.

2. As for spare parts order and supply, refer to the

"GUIDEBOOK for Spare parts Supply", published

seperately.

3. The numbers in item column correspond to the same

numbers in drawing.

PARTS LIST

M-300

PARTS LIST

FOB Japan

N Item Code No. Parts Name Specification Q N.R.Yen R

Unit Price

Electrical Parts

1 6923 3400 PCB ass'y JCM547-MA1M M240093*1 1 1,650 B

LSI101 2011 9387 LSI MSM6387-22 1 440 A

IC101 2114 3269 IC AN8053N 1 110 A

Q101, Q102 2220 1387 Transistor 2SC1740SQ-TP-T 2 13 B

D101 2390 1323 Diode RB100A-T32-T 1 29 B

D102 2390 0371 Diode DSK10B-BT-T 1 11 B

D103 2310 7848 Zener diode RD4.3ESB2-T1-T 1 12 B

D104 ~ D112 2390 1344 Diode 1SS133T-77-T 9 3 B

J101 3501 3731 Power jack HEC2305-01-250 1 30 A

JA 3719 4438 Ribbon cable DF5H13080-8000M 1 26 C

L101, L102 3841 1057 Common mode coil CM05RB01 2 63 C

LED101 2370 1106 LED MPR3338S-B99 1 20 B

MC101 2845 0168 Module capacitor CNB8X101K 1 58 C

X101 2590 1897 Ceramic oscillator EFO-EN2175C4 1 60 B

2 6923 3410 PCB ass'y JCM574-KY1M M240094*1 1 450 B

D201 ~ D235 2390 1344 Diode 1SS133T-77-T 35 3 B

JB 3719 4431 Ribbon cable DF5H04105-80008000 1 15 C

2-1 4317 5440 Blank PCB JCM547-CN1M M240092-2 1 49 C

Mechanical Parts

N 3 6906 7540 Rubber button, 6-contact M340025-2 1 270 B

N 4 6923 0960 Rubber button, 9-contact M340024-2 2 290 B

5 6923 3430 Rubber button, 3-contact M340023-1 1 90 B

6 3831 0378 Speaker EAS-8P149BD 1 160 B

7 6909 5890 Slide contact CSB-12D 1 35 B

8 6906 5442 Slide knob M311360-2 1 14 A

9 6906 4374 Key set, NM M411026D*1 1 210 A

N 10 6923 4380 Dial M240024-2 1 100 C

N 11 6923 4492 Upper case M240044B*3 1 450 C

12 6923 3061 Button M340026-1 3 33 C

13 6923 3460 Contact rubber M340027-1 1 40 B

14 6923 3520 Coupling M340028-1 1 35 C

15 6917 1080 Key contact rubber M310878-1 1 87 A

16 6917 3383 Key stopper M42611C-3 1 24 C

N 17 6923 4371 Lower case M240045A*3 1 410 C

17-1 6912 2630 Battery spring (-) M42382-1 1 14 B

17-2 6345 2238 Battery spring (+) A42606B-1 1 5 B

18 6906 7261 Battery cover M312197A*1 1 49 B

S-1 0009 2682 Screw 2.6 x 8 16 2C

S-2 0009 4589 Screw 2.6 x 8 8 2 C

S-3 0009 5573 Screw 2.6 x 10 15 2 C

Notes: N – New parts

M – Minimum order/supply quantity

R – Rank

— 9 —

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