Casio MA-100 User manual

ELECTRONIC KEYBOARD

MA-100

100 TONES

KEYBOARD

00 PIANO

01 ELEC PIANO

02 FUNKY CLAVI

03 HARPSICHORD

04 ELEC ORGAN

05 JAZZ ORGAN

06 PIPE ORGAN

CHURCH ORGAN

STREET ORGAN

09 ACCORDION

WIND

SAMBA WHISTLE

11 WHISTLE

12 QUENA

13 FLUTE

14 FLUTE-VIB

15 OCARINA

16 BAGPIPE

HARMONICA

CHORUS

BRASS-STRINGS

STRING

WARM STRINGS

21 STRINGS

22 VIOLIN

23 VIOLIN-VIB

24 CELLO

ELEC GUITAR

JAZZ GUITAR

MUTE GUITAR

METAL GUITAR

29 SLAP BASS

ELEC BASS

WOOD BASS

SNARE BASS

33 MANDOLIN

34 BANJO

SITAR

UKULELE

HARP

TAISHOKOTO

39 SHAMISEN

BRASS

BRASS ENS

WARM BRASS

42 TRUMPET

43 TUBA

44 BRASS HIT

WIND ENS

ENGLISH HORN

OBOE

BASSOON

49 CLARINET

MODE

POWER OFF FINGERED

NORMAL CASIO

CHORD

VOLUME

MIN MAX

PERCUSSION

50 VIBRAPHONE

51 MARIMBA

52 CHURCH BELLS

53 BELLS

54 TOM

55 ROCK DRUM

56 SWING DRUM

TRIANGLE

SAMPLE PERCUSSION

59 MATSURI

TEMPO

SYNTH-SOUND

60 SYNTH-CELESTA

61 SYNTH-CLAVI

SYNTH-ACCORDION

63 SYNTH-PIANO

64 SYNTH-BRASS

65 SYNTH-REED

66 SYNTH-LEAD

67 SYNTH-GUITAR

68 SYNTH-STRINGS

69 SYNTH-BASS

GRASS HARMONICA

71 FANTASY

WAW VOICE

73 TWINKLE ECHO

74 METAL LEAD

75 PLUNK EXTEND

76 COSMIC DANCE

77 CATHEDRAL

78 POP LEAD

79 PEARL DROP

SOUND EFFECT

80 AIRPLANE

81 AMBULANCE

82 INSECT

EMERGENCY ALARM

84 LASER BEAM

COSMIC SOUND

86 TELEPHONE

87 CAR HORN

COMPUTER SOUND

MOTORCYCLE

KEYBOARD SPLIT

BASS/VIBRAPHONE

BASS/PIANO

BASS/TRUMPET

BASS/SYNTH-LEAD

BASS/ELEC ORGAN

STRINGS/BRASS

96 CHORUS/BELLS

BRASS/SYNTH-REED

PIANO/FLUTE

STRINGS/OBOE

TONE/RHYTHM SELECT TONE

POLY/TEXTURE43210

98765

RHYTHM DEMOFILL-IN START/

STOP

ROCK

00 ROCK 1

01 ROCK 2

02 HARD ROCK 1

03 HARD ROCK 2

04 HARD ROCK 3

05 HEAVY METAL 1

06 HEAVY METAL 2

8 BEAT 1

8 BEAT 2

8 BEAT 3

100 RHYTHMS 16 BEAT

16 BEAT 1

16 BEAT 2

16 BEAT 3

16 BEAT 4

16 BEAT 5

16 BEAT 6

16 BEAT 7

16 BEAT 8

18 LATIN

16 BEAT 1

19 LATIN

16 BEAT 2

DISCO

70'S DISCO

EURO-BEAT 1

EURO-BEAT 2

EURO-BEAT 3

EURO-BEAT 4

HIP-HOP 1

HIP-HOP 2

HIP-HOP 3

28 TECNO-POP

29 TECNO-POP

DISCO

FUNK 1

FUNK 2

FUNK 3

FUNK 4

FUNK 5

FUNK 6

FUNK 7

FUNK 8

FUNK 9

FUNK 10

POPS

40 POPS

41 POPS

42 POPS

43 POPS

44 POPS

45 30' POPS

46 60' POPS 1

47 60' POPS 2

48 60' POPS 3

49 60' POPS 4

OLDTIME ROCK

50 ROCK'N'ROLL 1

51 ROCK'N'ROLL 2

52 ROCK'N'ROLL 3

53 MERSEY BEAT

54 SLOW ROCK 1

55 SLOW ROCK 2

56 SLOW ROCK 3

DOO-WOP

RHYTHM & BLUES

BLUES

SWING

60 SWING 1

61 SWING 2

62 SWING 3

63 SWING 4

64 BIG BAND 1

65 BIG BAND 2

66 BIG BAND 3

JAZZ WALTZ

TAP-DANCE BEAT

BOOGIE-WOOGIE

LATIN

70 SAMBA 1

71 SAMBA 2

BOSSA NOVA 1

BOSSA NOVA 2

74 TANGO

75 BEGUINE

76 MAMBO

77 RUMBA

CHA-CHA-CHA

HABANERA

VARIOUS

80 REGGAE 1

81 REGGAE 2

82 SALSA 1

83 SALSA 2

84 SALSA 3

85 FOLKLORE 1

86 FOLKLORE 2

87 COUNTRY

ENKA

POLKA

90 GALOP 1

91 GALOP 2

92 MARCH 1

93 MARCH 2

94 WALTZ 1

95 WALTZ 2

96 CLASSICAL

ELEC CLASSICAL

STREET ORGAN

KOTO

DEFF

BCC

CHORD

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

D#3

C#3A#2G#2F#2

D#2

C#2

C2 D2 E2 F2 G2 A2 B2 C3 D3 E3

CONTENTS

Specifications ..................................................................2

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

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

Troubleshooting...............................................................5

Major Waveforms ............................................................8

Schematic Diagrams ....................................................... 9

PCB View ...................................................................... 11

Exploded View...............................................................12

Parts List ....................................................................... 13

SPECIFICATIONS

GENERAL

Number of keys: 49

Polyphonic: 8-note

Preset tones: 100

Auto-rhythms: 100

Auto-accompaniment: CASIO Chord/Fingered

Demonstration tune: Classical Medley

Built-in speakers: 8 cm dia. 1.1 W Input Rating: 1 pc.

Terminal: AC Adapter Jack (DC 7.5 V)

Power source: 2-way AC or DC source

AC: AC adapter

DC: 5 AA size dry batteries

Power consumption: 1.8 W

Dimensions(HWD): 63 x 650 x 217 mm

(2-1/2 x 25-9/16 x 8-1/2 inches)

Weight: 1.4 kg (3.1 lbs) excluding batteries

ELECTRICAL

Current drain with 9V DC:

No sound output 34 mA ±20%

Maximum volume 110 mA ±20%

with keys C3, D3, E3 and F3 pressed

in Church Organ tone, Volume; Maximum

Speaker Output Level at 4 Ωload: 510 mV ±20 %

with key E2 pressed in Church Organ tone

Volume; Maximum

Minimum operating voltage: 5.5 V

Nomenclature of Keys

— 2 —

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

KO0 ~ KO9

MSM6387-13

KI0 KI1 KI2 KI3 KI4 KI5 KI6 KI7

KO0 0 1 C2 C#2 D2 D#2 E2 F2

KO1 2 3 F#2 G2 G#2 A2 A#2 B2

KO2 4 5 C3 C#3 D3 D#3 E3 F3

KO3 6 7 F#3 G3 G#3 A3 A#3 B3

KO4 8 9 C4 C#4 D4 D#4 E4 F4

KO5 Tone Rhythm F#4 G4 G#4 A4 A#4 B4

KO6 Tempo

Up Tempo

Down C5 C#5 D5 D#5 E5 F5

KO7 Start/

Stop Fill-In F#5 G5 G#5 A5 A#5 B5

KO8 Demo C6

KO9 Normal Fingered CASIO

Chord

— 3 —

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 source 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

CPU (LSI101: MSM6387-13)

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

in accodance with the pressed key and the selected tone.

The following table shows the pin functions of LSI101.

Filter Block

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

AVDD

C108

Q101

2SC1740SQ

C107

R107

R2106

C106

C109

R105

R104

R108

To power amp

From CPU

Amplifier/Voltage Regulator

(IC101: AN8053N)

The right figure shows the internal block of IC101.

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

— 4 —

TROUBLESHOOTING

No power

Power indicator does not light up.

Connect an AC adapter into the power jack.

Does the keyboard work?

Measure voltage at pin 16 of IC AN8053N.

Is the voltage +6.8 V?

Check contact of the power jack.

Is it OK?

Replace the jack. Check soldering at pins of the

power jack.

Is it OK?

Check D102.

If D102 is defect,

replace it.

Solder the pins.

Check contact at battery springs.

Replace D101.

Check contact of power switch.

Clean the switch contacts.

Yes

No Yes

Yes No

— 5 —

No sound

Measure voltage at pin 13 of IC AN8053N.

Is the voltage +5 V ?

Measure voltage at pin 16 of IC AN8053N.

Is the voltage +6.8 V?

Follow flow chart

of No Power.

Measure voltage at pin 14 of IC AN8053N.

Is the voltage 0 V?

Clean contacts of the

power switch.

Replace IC AN8053N.

Turning power on, measure voltage

at pin 3 of LSI MSM6387-13.

Does the voltage raise

from 0 V to +5 V?

Clean contacts of the

power switch. A

Yes No

NoYes

Yes

— 6 —

Measure voltage at pins 22 ~ 30 of LSI

MSM6387-13.

End

Is the voltage +0.3 V?

Replace LSI

MSM6387-13.

Does the keyboard work?

Replace ceramic

oscillator X101.

Does the keyboard work?

Replace transistor Q102.

Does the keyboard work?

Check the circuit around

Q102 and X101.

Touch pin 5 of LSI MSM6387-13 with test

rod (+) of multimeter in resistance range,

connecting test rod (-) to ground.

Is a noise made?

Touch pin 6 of IC AN8053N with test rod (+)

of multimeter in resistance range,

connecting test rod (-) to ground.

Is the noise made?

Using a multimeter, check conductivity of

speaker at terminals on the main PCB.

Is it OK?

Replace speaker.

Replace LSI

MSM6387-13.

Check filter circuit around

Q101.

Yes No

Yes Yes

Yes

Replace IC

AN8053N.

Yes

— 7 —

MAJOR WAVEFORMS

Clock pulse COSI

MSM6387-13 pin 8

Key scan signal KO0

MSM6387-13 pin 30

Key scan signal KO1

MSM6387-13 pin 29

Sound signal output

MSM6387-13 pin 5

Filter output

Emitter of Q201

Power amp input

LA4598 pin 6

Power amp output

LA5498 pin 3

Tone : Flute (No.13)

Key : A3

Volume : Maximum

50 ns

CH1: 1V

2 ms

CH1: 5 V

–CH2: 5 V

–

2 ms

CH1: 50 mV CH2: 0.5 V

CH1: 50 mV CH2: 50 mV

2 ms

CH1

CH2

CH1

CH2

CH1

CH2

6Power amp input

AN8053N pin 6

7Power amp output

AN8053N pin 1

2Key scan signal KO0

MSM6387-13 pin 30

3Key scan signal KO1

MSM6387-13 pin 29

1Clock pulse COSI

MSM6387-13 pin 8

4Sound signal output

MSM6387-13 pin 5

5Filter output

Collector of Q101

— 8 —

— 9 —

SCHEMATIC DIAGRAMS

— 10 —

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