ELECTRONIC KEYBOARD
MA-100
MA-100
100 TONES
KEYBOARD
00 PIANO
01 ELEC PIANO
02 FUNKY CLAVI
03 HARPSICHORD
04 ELEC ORGAN
05 JAZZ ORGAN
06 PIPE ORGAN
07 CHURCH ORGAN
08 STREET ORGAN
09 ACCORDION
WIND
10 SAMBA WHISTLE
11 WHISTLE
12 QUENA
13 FLUTE
14 FLUTE-VIB
15 OCARINA
16 BAGPIPE
17 HARMONICA
18 CHORUS
19 BRASS-STRINGS
STRING
20 WARM STRINGS
21 STRINGS
22 VIOLIN
23 VIOLIN-VIB
24 CELLO
25 ELEC GUITAR
26 JAZZ GUITAR
27 MUTE GUITAR
28 METAL GUITAR
29 SLAP BASS
30 ELEC BASS
31 WOOD BASS
32 SNARE BASS
33 MANDOLIN
34 BANJO
35 SITAR
36 UKULELE
37 HARP
38 TAISHOKOTO
39 SHAMISEN
BRASS
40 BRASS ENS
41 WARM BRASS
42 TRUMPET
43 TUBA
44 BRASS HIT
45 WIND ENS
46 ENGLISH HORN
47 OBOE
48 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
57 TRIANGLE
58 SAMPLE PERCUSSION
59 MATSURI
TEMPO
SYNTH-SOUND
60 SYNTH-CELESTA
61 SYNTH-CLAVI
62 SYNTH-ACCORDION
63 SYNTH-PIANO
64 SYNTH-BRASS
65 SYNTH-REED
66 SYNTH-LEAD
67 SYNTH-GUITAR
68 SYNTH-STRINGS
69 SYNTH-BASS
70 GRASS HARMONICA
71 FANTASY
72 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
83 EMERGENCY ALARM
84 LASER BEAM
85 COSMIC SOUND
86 TELEPHONE
87 CAR HORN
88 COMPUTER SOUND
89 MOTORCYCLE
KEYBOARD SPLIT
90 BASS/VIBRAPHONE
91 BASS/PIANO
92 BASS/TRUMPET
93 BASS/SYNTH-LEAD
94 BASS/ELEC ORGAN
95 STRINGS/BRASS
96 CHORUS/BELLS
97 BRASS/SYNTH-REED
98 PIANO/FLUTE
99 STRINGS/OBOE
TONE/RHYTHM SELECT
TONE
POLY/TEXTURE
4
3
2
1
0
9
8
7
6
5
RHYTHM
DEMO
FILL-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
07 8 BEAT 1
08 8 BEAT 2
09 8 BEAT 3
100 RHYTHMS
16 BEAT
10 16 BEAT 1
11 16 BEAT 2
12 16 BEAT 3
13 16 BEAT 4
14 16 BEAT 5
15 16 BEAT 6
16 16 BEAT 7
17 16 BEAT 8
18 LATIN 16 BEAT 1
19 LATIN 16 BEAT 2
DISCO
20 70'S DISCO
21 EURO-BEAT 1
22 EURO-BEAT 2
23 EURO-BEAT 3
24 EURO-BEAT 4
25 HIP-HOP 1
26 HIP-HOP 2
27 HIP-HOP 3
28 TECNO-POP 1
29 TECNO-POP 2
DISCO
30 FUNK 1
31 FUNK 2
32 FUNK 3
33 FUNK 4
34 FUNK 5
35 FUNK 6
36 FUNK 7
37 FUNK 8
38 FUNK 9
39 FUNK 10
POPS
40 POPS 1
41 POPS 2
42 POPS 3
43 POPS 4
44 POPS 5
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
57 DOO-WOP
58 RHYTHM & BLUES
59 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
67 JAZZ WALTZ
68 TAP-DANCE BEAT
69 BOOGIE-WOOGIE
LATIN
70 SAMBA 1
71 SAMBA 2
72 BOSSA NOVA 1
73 BOSSA NOVA 2
74 TANGO
75 BEGUINE
76 MAMBO
77 RUMBA
78 CHA-CHA-CHA
79 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
88 ENKA
89 POLKA
90 GALOP 1
91 GALOP 2
92 MARCH 1
93 MARCH 2
94 WALTZ 1
95 WALTZ 2
96 CLASSICAL
97 ELEC CLASSICAL
98 STREET ORGAN
99 KOTO
CC#
E
DE
F
F# GA
AB
BC
C# DE
EF
£
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#3
A#2
G#2
F#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
load:
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
AG
R107
R2106
C106
C109
AG
R105
AG
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
8
7
6
5
4
3
2
1
SP AMP
VREF
5V REG
POWER
SPO
NC
SP GND PC-1
PC-2
SPI
SPM
VREF
VCC
NC
CONT
5V
VREG
NC
NC
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.
No
Yes
No
Yes
No
Yes
Yes
No
-- 5 --