Casio_CTK-401_Service_Manual.pdf

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CTK-401
100 RHYTHMS
100 TONES
TONE
RHYTHM
SONG BANK
STATUS
TEMPO
VOLUME
100 SONG BANK (00-49)
POWER/MODE
CHORD BOOK
M
m
7
MUSICAL INFORMATION SYSTEM
REW
M7
dim
TONE
SONG BANK
LEFT
ON/OFF
RIGHT
ON/OFF
STOP
FF
100 SONG BANK (50-99)
MAIN SYNCHRO/ START/
VOLUME FILL-IN
STOP TEMPO
FINGERED
CASIO
CHORD
NORMAL
0
5
aug
ACCOMP VOLUME
1
6
sus4
2
7
-5
3
8
add9
4
9
CLEAR
RHYTHM
ON
OFF
TRANSPOSE/
TUNE
SO
NG
BA
PLAY/
PAUSE
LER
NK
CONTROL
100 SONG BANK KEYBOARD
MUSICAL INFORMATION SYSTEM
SONG BANK CONTROLLER
CTK-401
ELECTRONIC KEYBOARD
CONTENTS
Specifications ................................................................................................................................... 1
Block Diagram .................................................................................................................................. 2
Circuit Description ............................................................................................................................ 3
Adjustment ....................................................................................................................................... 7
Major Waveforms ............................................................................................................................. 8
Printed Circuit Boards ...................................................................................................................... 9
Schematic Diagrams ...................................................................................................................... 11
Exploded View ............................................................................................................................... 15
Parts List ........................................................................................................................................ 17
SPECIFICATIONS
GENERAL
Keyboard:
Tones:
Polyphony:
Auto accompaniment
Rhythm patterns:
Tempo:
Chords:
Rhythm controller:
Accomp volume:
Song bank
Tunes:
Controllers:
Musical dictionary
Name display:
Tempo:
Chord:
Fingering:
Song bank status:
Staff:
Keyboard:
Other functions
Transpose:
Tuning:
Volume:
Terminals
Phones/Output terminal:
49 standard-size keys, 4 octaves
100
12 notes maximum (6 for certain tones)
100
Variable (236 steps, = 20 to 255)
2 fingering methods (CASIO CHORD, FINGERED)
START/STOP, SYNCHRO/FILL-IN
0 to 9 (10 steps)
100
PLAY/PAUSE, STOP, REW, FF, LEFT ON/OFF, RIGHT ON/OFF
TONE, RHYTHM, SONG BANK name/number
Tempo value, metronome, synchro standby, beat indicator
Chord name, Chord form
Fingering indcators, parts
PLAY, PAUSE, REW, FF, playing
Four octaves with sharp and flat indications
Four octaves
12 steps (–6 semitones to +5 semitones)
Variable (A4 = approximately 440 Hz
±
50 cents)
0 to 9 (10 steps)
Stereo standard jack
Output Impedance: 100
Ω
Output Voltage: 3.0 V (RMS) MAX
9 V DC
Dual power supply system
Six AA-size batteries
Approximately 2 hours (SUM-3/R6P)/6 hours (AM3/LR6)
AD-5
Turns power off approximately six minutes after last key operation. Enabled
under battery power only, can be disabled manually.
2.0 W + 2.0 W
9 V --- 7.0 W
988
×
332
×
124 mm (38-15/16
×
13-1/16
×
4-7/8 inches)
Approximately 3.5 kg (7.7 lbs) (without batteries)
Power supply terminal:
Power supply
Batteries:
Battery life:
AC adaptor:
Auto power off:
Speaker output:
Power consumption:
Dimensions (HWD):
Weight:
ELECTRICAL
Current drain with 9 V DC:
No sound output
Maximum volume
with 12 keys C4 to B4 pressed in Synth-Lead 1
Volume: 9 (Max.)
Phone output level (Vrms with 8
Ω
load each channel):
with key A4 pressed in Synth-Lead 1
Speaker output level (Vrms with 4
Ω
load each channel):
with key A4 pressed in Synth-Lead 1
Minimum operating voltage:
100 mA
±
20 %
625 mA
±
20 %
67 mV
±
20 %
900 mV
±
20 %
5.7 V
—1—
BLOCK DIAGRAM
COM1 ~ COM16
LCD Driver
SED1278F0A
LSI3
Buttons
SEG1 ~ SEG40
RS
R/W
E
Keyboard
LCD
Output
DB4 ~ DB7
KO8 ~
KO12
KI0 ~ KI6
Power Amp.
TA8248K
IC101
Filter (L)
Q104
KO0 ~ KO7
Filter (R)
Q105
—2—
VC
VCC DVDD
APO
CPU
MSM 6755B-17
LSI1
MD0 ~ MD7
DC + 9 V IN
Power Supply Circuit
Q101 ~ Q103, D104
MA0 ~ MA17
ROM(2M-bit)
UM23C2101M
7384/Q
LSI2
Reset IC
IC1
Oscillator
X1, Q1
CIRCUIT DESCRIPTION
KEY MATRIX
KI0
KO0
KO1
KO2
KO3
KO4
KO5
KO6
KO7
KO8
KO9
KO10
KO11
KO12
C2
C#2
D2
D#2
E2
F2
F#2
G2
—
3
6
9
FF
KI1
G#2
A2
A#2
B2
C3
C#3
D3
D#3
+
2
5
8
Right
KI2
E3
F3
F#3
G3
G#3
A3
A#3
B3
0
1
4
7
Play/
Pause
KI3
C4
C#4
D4
D#4
E4
F4
F#4
G4
Tempo
Down
Start/
Stop
Transpose/
Tune
Fingered
Stop
KI4
G#4
A4
A#4
B4
C5
C#5
D5
D#5
Tempo
Up
Synchro/
Fill-in
Song
Bank
CASIO
Chord
Left
KI5
E5
F5
F#5
G5
G#5
A5
A#5
B5
Volume
Down
Chord
Book
Rhythm
Normal
Rewind
Volume
Up
Accomp
Volume
Tone
Power Off
KI6
C6
NOMENCLATURE OF KEYS
C#2 D#2
F#2 G#2
A#2
C#3 D#3
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
C2
D2
E2
F2
G2
A2
B2
C3
D3
E3
F3
G3
A3
B3
C4
D4
E4
F4
G4
A4
B4
C5
D5
E5
F5
G5
A5
B5
C6
—3—

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