Casio MA-100 User manual

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/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
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
b
DEFF
#
GA
b
AB
b
BCC
#
DE
b
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#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
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
32
1
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.
No
Yes
No
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
No
NoYes
Yes
No
— 6 —

A
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
Yes
No
No
No
No
No
No
Yes
Replace IC
AN8053N.
Yes
— 7 —

MAJOR WAVEFORMS
1
Clock pulse COSI
MSM6387-13 pin 8
2
3
Key scan signal KO0
MSM6387-13 pin 30
Key scan signal KO1
MSM6387-13 pin 29
4
5
6
7
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
12
3
4
5
6
7
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
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
1
4
5
6
7
2
3
— 8 —

— 9 —
SCHEMATIC DIAGRAMS

1
4
2
5
7
6
3
— 10 —

— 11 —
PCB VIEW
Main PCB
14
2
36 7
5

— 12 —
R-1
R-2
1
10
9
12
2
13
3
4
8
7
11
5
6
EXPLODED VIEW

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 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
MA-100

FOB Japan
N Item Code No. Parts Name Specification Q N.R.Yen R
Unit Price
IC101 2114 3269 IC, Power Amp. AN8053N 1 A
LSI101 2011 2961 LSI, CPU MSM6387-13 1 A
Q101, 102 2220 1387 Transistor 2SC1740SQ-TP-T 2 B
D101 2390 1323 Diode RB100A-T32-T 1 B
D102 2390 0371 Diode DSK10B-BT-T 1 B
D103 2310 7848 Zener diode RD4. 3ESB2-T1-T 1 A
X101 2590 1897 Ceramic oscillator EFO-EN2175C4 1 B
J101 3501 3731 Power jack HEC2305-01-250 1 A
N 1 6925 0500 PCB ass'y, MA1M M240352*1 1 B
N 2 6925 0510 PCB ass'y, KY M240353*1 1 B
3 6921 5031 Slide knob M311859A-1 2 B
N 4 6925 0540 Button, Rubber M240278-1 1 B
5 6909 5890 Slide contact CSB-12D 2 B
N 6 3831 1029 Speaker 300RB03 1B
N7 6925 0550 White key set, 19-key M140301-1 1A
N 8 6925 0560 Black key set, 13-key M140302-1 1 A
N 9 6925 0570 White key set, 10-key M140303-1 1 A
N 10 6925 0580 Black key set, 7-key M140304-1 1A
N 11 6925 0590 Key contact rubber, 32-contact M240287-1 1 B
N12 6925 0600 Key contact rubber, 17-contact M240288-1 1B
13 6906 7511 Battery cover M312197A*3 1 B
Notes: N – New parts
R – Rank — 13 —

MA0400761A