MA-100
100 TONES
KEYBOARD
WIND
STRING
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
PIANO
ELEC PIANO
FUNKY CLAVI
HARPSICHORD
ELEC ORGAN
JAZZ ORGAN
PIPE ORGAN
CHURCH ORGAN
STREET ORGAN
ACCORDION
SAMBA WHISTLE
WHISTLE
QUENA
FLUTE
FLUTE-VIB
OCARINA
BAGPIPE
HARMONICA
CHORUS
BRASS-STRINGS
WARM STRINGS
STRINGS
VIOLIN
VIOLIN-VIB
CELLO
ELEC GUITAR
JAZZ GUITAR
MUTE GUITAR
METAL GUITAR
SLAP BASS
30
31
32
33
34
35
36
37
38
39
ELEC BASS
WOOD BASS
SNARE BASS
MANDOLIN
BANJO
SITAR
UKULELE
HARP
TAISHOKOTO
SHAMISEN
BRASS
PERCUSSION
SYNTH-SOUND
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
BRASS ENS
WARM BRASS
TRUMPET
TUBA
BRASS HIT
WIND ENS
ENGLISH HORN
OBOE
BASSOON
CLARINET
VIBRAPHONE
MARIMBA
CHURCH BELLS
BELLS
TOM
ROCK DRUM
SWING DRUM
TRIANGLE
SAMPLE PERCUSSION
MATSURI
SYNTH-CELESTA
SYNTH-CLAVI
SYNTH-ACCORDION
SYNTH-PIANO
SYNTH-BRASS
SYNTH-REED
SYNTH-LEAD
SYNTH-GUITAR
SYNTH-STRINGS
SYNTH-BASS
TEMPO
MODE
POWER OFF
VOLUME
FINGERED
NORMAL
MIN
E
b
E
F
F# G
A
b
A
B
b
B
C
C# D
E
SOUND EFFECT
KEYBOARD SPLIT
100 RHYTHMS
16 BEAT
ROCK
DISCO
DISCO
POPS
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
00
01
02
03
04
05
06
07
08
09
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
POPS 1
POPS 2
POPS 3
POPS 4
POPS 5
30' POPS
60' POPS 1
60' POPS 2
60' POPS 3
60' POPS 4
90
91
92
93
94
95
96
97
98
99
GALOP 1
GALOP 2
MARCH 1
MARCH 2
WALTZ 1
WALTZ 2
CLASSICAL
ELEC CLASSICAL
STREET ORGAN
KOTO
TONE/RHYTHM SELECT
AIRPLANE
AMBULANCE
INSECT
EMERGENCY ALARM
LASER BEAM
COSMIC SOUND
TELEPHONE
CAR HORN
COMPUTER SOUND
MOTORCYCLE
BASS/VIBRAPHONE
BASS/PIANO
BASS/TRUMPET
BASS/SYNTH-LEAD
BASS/ELEC ORGAN
STRINGS/BRASS
CHORUS/BELLS
BRASS/SYNTH-REED
PIANO/FLUTE
STRINGS/OBOE
TONE
0
1
2
3
4
POLY/TEXTURE
5
6
7
8
9
RHYTHM
CASIO
CHORD
b
E
F
£
C# D
GRASS HARMONICA
FANTASY
WAW VOICE
TWINKLE ECHO
METAL LEAD
PLUNK EXTEND
COSMIC DANCE
CATHEDRAL
POP LEAD
PEARL DROP
MAX
FILL-IN
C
70
71
72
73
74
75
76
77
78
79
START/
STOP
DEMO
ROCK 1
ROCK 2
HARD ROCK 1
HARD ROCK 2
HARD ROCK 3
HEAVY METAL 1
HEAVY METAL 2
8 BEAT 1
8 BEAT 2
8 BEAT 3
10
11
12
13
14
15
16
17
18
19
16 BEAT 1
16 BEAT 2
16 BEAT 3
16 BEAT 4
16 BEAT 5
16 BEAT 6
16 BEAT 7
16 BEAT 8
LATIN 16 BEAT 1
LATIN 16 BEAT 2
70'S DISCO
EURO-BEAT 1
EURO-BEAT 2
EURO-BEAT 3
EURO-BEAT 4
HIP-HOP 1
HIP-HOP 2
HIP-HOP 3
TECNO-POP 1
TECNO-POP 2
FUNK 1
FUNK 2
FUNK 3
FUNK 4
FUNK 5
FUNK 6
FUNK 7
FUNK 8
FUNK 9
FUNK 10
OLDTIME ROCK SWING
LATIN
VARIOUS
50
51
52
53
54
55
56
57
58
59
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
ROCK'N'ROLL 1
ROCK'N'ROLL 2
ROCK'N'ROLL 3
MERSEY BEAT
SLOW ROCK 1
SLOW ROCK 2
SLOW ROCK 3
DOO-WOP
RHYTHM & BLUES
BLUES
60
61
62
63
64
65
66
67
68
69
SWING 1
SWING 2
SWING 3
SWING 4
BIG BAND 1
BIG BAND 2
BIG BAND 3
JAZZ WALTZ
TAP-DANCE BEAT
BOOGIE-WOOGIE
SAMBA 1
SAMBA 2
BOSSA NOVA 1
BOSSA NOVA 2
TANGO
BEGUINE
MAMBO
RUMBA
CHA-CHA-CHA
HABANERA
REGGAE 1
REGGAE 2
SALSA 1
SALSA 2
SALSA 3
FOLKLORE 1
FOLKLORE 2
COUNTRY
ENKA
POLKA
CHORD
MA-100
ELECTRONIC KEYBOARD
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:
Polyphonic:
Preset tones:
Auto-rhythms:
Auto-accompaniment:
Demonstration tune:
Built-in speakers:
Terminal:
Power source:
49
8-note
100
100
CASIO Chord/Fingered
Classical Medley
8 cm dia. 1.1 W Input Rating: 1 pc.
AC Adapter Jack (DC 7.5 V)
2-way AC or DC source
AC: AC adapter
DC: 5 AA size dry batteries
1.8 W
63 x 650 x 217 mm
(2-1/2 x 25-9/16 x 8-1/2 inches)
1.4 kg (3.1 lbs) excluding batteries
Power consumption:
Dimensions(HWD):
Weight:
ELECTRICAL
Current drain with 9V DC:
No sound output
Maximum volume
with keys C3, D3, E3 and F3 pressed
in Church Organ tone, Volume; Maximum
Speaker Output Level at 4 Ω load:
with key E2 pressed in Church Organ tone
Volume; Maximum
Minimum operating voltage:
34 mA ± 20%
110 mA ± 20%
510 mV ± 20 %
5.5 V
Nomenclature of Keys
C#2 D#2
C2
D2
E2
F#2 G#2 A#2
F2
G2
A2
B2
C#3 D#3
C3 D3
E3
F#3 G#3 A#3
F3
G3
A3
C#4 D#4
B3
C4
D4
—2—
E4
F#4 G#4 A#4
F4
G4
A4
B4
C#5 D#5
C5
D5
E5
F#5 G#5 A#5
F5
G5
A5
B5
C6
BLOCK DIAGRAM
KO0 ~~KO8
KO9
KO0
KI0 ~
KI7
CPU
Amplifier
AN8053N
IC101
Filter
Q101
MSM6387-22
MSM6387-13
LSI101
Speaker
VDD
Keyboard
AVDD
Oscillator
Q102, X101
Buttons
CIRCUIT DESCRIPTION
Key Matrix
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
Normal
Fingered
CASIO
Chord
C6
KO9
—3—
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.
Pin No.
Terminal
In/Out
Function
1, 2
TEST1, TEST2
—
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
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
—
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
Not used. Connected to ground.
Sound waveform output
Not used
Filter Block
Since the sound signal from the CPU is a stepped waveform, the filter block is added to smooth the waveform.
AVDD
Q101
2SC1740SQ
R2106
C106
AG
R108
From CPU
C108
C107
C109
R105
R104
To power amp
R107
AG
AG
Amplifier/Voltage Regulator
(IC101: AN8053N)
VCC
NC
CONT
5V
VREG
NC
NC
NC PRE GND
16
15
14
13
12
11
10
The right figure shows the internal block of IC101.
9
5V REG
POWER
SP AMP
VREF
+
1
2
SPO
NC
—4—
3
4
SP GND PC-1
5
6
7
8
PC-2
SPI
SPM
VREF
TROUBLESHOOTING
No power
Power indicator does not light up.
Connect an AC adapter into the power jack.
Yes
Does the keyboard work?
No
Check contact at battery springs.
Measure voltage at pin 16 of IC AN8053N.
Replace D101.
Yes
Is the voltage +6.8 V?
No
Check contact of power switch.
Check contact of the power jack.
Clean the switch contacts.
No
Yes
Is it OK?
Check soldering at pins of the
power jack.
Replace the jack.
Yes
Check D102.
If D102 is defect,
replace it.
—5—
Is it OK?
No
Solder the pins.
No sound
Measure voltage at pin 13 of IC AN8053N.
Yes
No
Is the voltage +5 V ?
Measure voltage at pin 16 of IC AN8053N.
Is the voltage +6.8 V?
No
Follow flow chart
of No Power.
Measure voltage at pin 14 of IC AN8053N.
Yes
Turning power on, measure voltage
at pin 3 of LSI MSM6387-13.
Replace IC AN8053N.
Does the voltage raise
from 0 V to +5 V?
Yes
No
Clean contacts of the
power switch.
A
—6—
Is the voltage 0 V?
No
Clean contacts of the
power switch.
A
Measure voltage at pins 22 ~ 30 of LSI
MSM6387-13.
Yes
Is the voltage +0.3 V?
Touch pin 5 of LSI MSM6387-13 with test
rod (+) of multimeter in resistance range,
connecting test rod (-) to ground.
Is a noise made?
No
Replace LSI
MSM6387-13.
Yes
Does the keyboard work?
Yes
No
No
Replace LSI
MSM6387-13.
Replace ceramic
oscillator X101.
Touch pin 6 of IC AN8053N with test rod (+)
of multimeter in resistance range,
connecting test rod (-) to ground.
Does the keyboard work?
Is the noise made?
Yes
No
Yes
No
Check filter circuit around
Q101.
Using a multimeter, check conductivity of
speaker at terminals on the main PCB.
Replace transistor Q102.
Does the keyboard work?
Yes
No
Is it OK?
Yes
Check the circuit around
Q102 and X101.
No
Replace IC
AN8053N.
Replace speaker.
—7—
End
MAJOR WAVEFORMS
50 ns
11
2 ms
22
CH1
33
CH2
CH1
~
CH1: 1V
–
CH1: 5 V
1 Clock pulse COSI
1
MSM6387-13 pin 8
–
CH2: 5 V
Key scan
scan signal
signal KO0
KO0
22 Key
MSM6387-13
pin
30
MSM6387-13 pin 30
33 Key
Key scan
scan signal
signal KO1
KO1
MSM6387-13 pin
pin 29
29
MSM6387-13
2 ms
2 ms
CH1
44
CH2
55
66
CH1
77
CH2
~
~
CH1: 50 mV CH2: 50 mV
~
~
CH1: 50 mV CH2: 0.5 V
4 Sound signal output
4
MSM6387-13 pin 5
66 Power amp input
LA4598
pinpin
6 6
AN8053N
5 Filter output
5
Emitter ofofQ201
Collector
Q101
77 Power amp output
LA5498
pinpin
3 1
AN8053N
Tone : Flute (No.13)
Key : A3
Volume : Maximum
—8—
SCHEMATIC DIAGRAMS
—9—
4
5
1
2
3
7
6
— 10 —
PCB VIEW
Main PCB
1
— 11 —
3
2
4
5
6
7
EXPLODED VIEW
3
R-1
4
5
6
8
1
7
11
10
9
12
2
R-2
13
— 12 —
PARTS LIST
MA-100
Notes:
This parts list does not include the cosmetic parts, which
parts are marked with item No. "R-X" in the exploded
view.
Contact our spare parts department if you need these
parts for refurbish.
1.
Prices and specifications are subject to change without 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.
N
N
N
N
N
N
N
N
N
N
N
Item
Code No.
IC101
LSI101
Q101, 102
D101
D102
D103
X101
J101
1
2
3
4
5
6
7
8
9
10
11
12
13
2114 3269
2011 2961
2220 1387
2390 1323
2390 0371
2310 7848
2590 1897
3501 3731
6925 0500
6925 0510
6921 5031
6925 0540
6909 5890
3831 1029
6925 0550
6925 0560
6925 0570
6925 0580
6925 0590
6925 0600
6906 7511
Notes:
Parts Name
IC, Power Amp.
LSI, CPU
Transistor
Diode
Diode
Zener diode
Ceramic oscillator
Power jack
PCB ass'y, MA1M
PCB ass'y, KY
Slide knob
Button, Rubber
Slide contact
Speaker
White key set, 19-key
Black key set, 13-key
White key set, 10-key
Black key set, 7-key
Key contact rubber, 32-contact
Key contact rubber, 17-contact
Battery cover
N – New parts
R – Rank
— 13 —
Specification
AN8053N
MSM6387-13
2SC1740SQ-TP-T
RB100A-T32-T
DSK10B-BT-T
RD4. 3ESB2-T1-T
EFO-EN2175C4
HEC2305-01-250
M240352*1
M240353*1
M311859A-1
M240278-1
CSB-12D
300RB03
M140301-1
M140302-1
M140303-1
M140304-1
M240287-1
M240288-1
M312197A*3
Q
1
1
2
1
1
1
1
1
1
1
2
1
2
1
1
1
1
1
1
1
1
FOB Japan
N.R.Yen
R
Unit Price
A
A
B
B
B
A
B
A
B
B
B
B
B
B
A
A
A
A
B
B
B
MA0400761A