Casio CTK-631 Service Manual
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Casio CTK-631 Service Manual

Casio CTK-631 Service Manual

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Table of Contents

See also: User Manual
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BACKLIGHT LCD
DIGITAL REVARB
2-WAY MULTI-TRACK MEMORY
INDEX
CTK-631
POPS
I
DANCE / FUNK
ROCK
II
EUROPEAN
LATIN
II /
VARIOUS
I
REVERB
00
CLUB POP
20
RAP
40
BIG BAND ROCK
60
POLKA 1
80
SALSA
01
EURO POP
21
TRIP HOP
41
SHUFFLE ROCK
61
POLKA 2
81
REGGAE
02
22
42
62
82
90'S POP
TECHNO 1
OLDIES POP
MARCH 1
PUNTA
03
8 BEAT
23
TECHNO 2
43
OLDIES SHUFFLE
63
MARCH 2
83
CUMBIA
04
8 BEAT BALLAD 1
24
FUNKY GROOVE
44
BOOGIE-WOOGIE
64
MARCH 3
84
PASODOBLE
SYNTH
05
8 BEAT BALLAD 2
25
DRUM & BASS
45
50'S ROCK
65
WALTZ
85
RUMBA CATALANA
REVERB
06
26
46
66
86
60'S 8 BEAT
RAVE
TWIST
FRENCH WALTZ
SEVILLANA
07
27
47
67
87
16 BEAT
TRANCE
NEW ORLNS R&R
BALLROOM WALTZ
SKA
HALL
08
16 BEAT BALLAD
28
DISCO
48
CHICAGO BLUES
68
VIENNESE WALTZ
88
TEX-MEX
09
16 BEAT SHUFFLE
29
FUNK
49
R&B
69
TANGO
89
TOWNSHIP
STAGE
MIXER
POPS
II
ROCK
I
JAZZ
LATIN
I
VARIOUS
II
10
30
50
70
90
POP 1
AMERICAN ROCK
BIG BAND 1
BOSSA NOVA 1
COUNTRY
ROOM
11
POP 2
31
ROCK
51
BIG BAND 2
71
BOSSA NOVA 2
91
BLUEGRASS
12
70'S ROCK 1
32
70'S ROCK 2
52
SWING 1
72
SAMBA 1
92
FAST GOSPEL
SYNTH
POP BALLAD
33
RIFF ROCK
53
SWING 2
73
SAMBA 2
93
SLOW GOSPEL
MEMORY
16 BEAT SOUL
34
HEAVY METAL
54
SLOW SWING
74
BEGUINE
94
HAWAIIAN
MIXER
SOUL POP
35
POP ROCK
55
ORCH SWING
75
MAMBO
95
BROADWAY
WORLD POP
36
SOFT ROCK
56
FUNKY JAZZ
76
RHUMBA
96
EURO FOX
MEMORY
FUSION SHUFFLE
37
SLOW ROCK 1
57
JAZZ VOICES
77
CHA-CHA-CHA
97
QUICKSTEP
6/8 BALLAD
38
SLOW ROCK 2
58
ACID JAZZ
78
MERENGUE
98
ADANI
STEP
50'S R&B BALLAD
39
ROCK WALTZ
59
JAZZ WALTZ
79
BOLERO
99
BALADI
STEP
ACCOMP
VOLUME
POWER
TEMPO
GENERAL
MODE
VOLUME
MAX
FULL RANGE
CHORD
FINGERED
CASIO CHORD
NORMAL
MIN
START/STOP
ELECTRONIC KEYBOARD
PIANO
026
DEMO
000
GRAND PIANO
001
BRIGHT PIANO
002
E GRAND PIANO
003
HONKY-TONK
TRANSPOSE/
004
ELEC PIANO 1
TUNE/MIDI
005
ELEC PIANO 2
006
HARPSICHORD
007
CLAVI
GM
CHROMATIC PERC
FREE
008
CELESTA
SESSION
009
FREE
GLOCKENSPIEL
010
SESSION
MUSIC BOX
011
VIBRAPHONE
012
MARIMBA
LAYER
013
XYLOPHONE
LAYER
014
TUBULAR BELLS
015
DULCIMER
SPLIT
ORGAN
016
DRAWBAR ORGAN
TOUCH
017
PERC ORGAN
SPLIT
RESPONSE
018
ROCK ORGAN
019
CHURCH ORGAN
020
REED ORGAN
021
ACCORDION
TOUCH
022
HARMONICA
RESPONSE
023
BANDONEON
GUITAR
024
NYLON STR GT
025
STEEL STR GT
TONE
CHORD/1
2
3
4
5
6
RHYTHM
053
SYNTH-LEAD
106
JAZZ GUITAR
VOICE DOO
SHAMISEN
027
CLEAN GUITAR
054
SYNTH-VOICE
080
SQUARE WAVE
107
KOTO
028
MUTE GUITAR
055
ORCHESTRA HIT
081
SAWTOOTH WAVE
108
KALIMBA
029
BRASS
082
109
OVERDRIVE GT
CALLIOPE
BAG PIPE
030
DIST GUITAR
056
TRUMPET
083
CHIFF LEAD
110
FIDDLE
031
GT HARMONICS
057
TROMBONE
084
CHARANG
111
SHANAI
BASS
058
TUBA
085
VOICE LEAD
PERCUSSIVE
032
059
086
112
ACOUSTIC BASS
MUTE TRUMPET
FIFTH LEAD
TINKLE BELL
033
FINGERED BASS
060
FRENCH HORN
087
BASS + LEAD
113
AGOGO
034
PICKED BASS
061
BRASS
SYNTH-PAD
114
STEEL DRUM
035
FRETLESS BASS
062
SYNTH-BRASS 1
088
NEW AGE
115
WOOD BLOCK
036
063
089
116
SLAP BASS 1
SYNTH-BRASS2
WARM PAD
TAIKO
037
REED
090
117
SLAP BASS 2
POLYSYNTH
MELODIC TOM
038
SYNTH-BASS 1
064
SOPRANO SAX
091
SPACE CHOIR
118
SYNTH-DRUM
039
SYNTH-BASS 2
065
ALTO SAX
092
BOWED GLASS
119
REVERSE CYMBAL
STR/ORCHESTRA
066
093
TENOR SAX
METALLIC PAD
SOUND EFFECTS
040
067
094
120
VIOLIN
BARITONE SAX
HALO PAD
GT FRET NOISE
041
VIOLA
068
OBOE
095
SWEEP PAD
121
BREATH NOISE
042
CELLO
069
ENGLISH HORN
SYNTH-SFX
122
SEASHORE
043
CONTRABASS
070
BASSOON
096
RAIN DROP
123
BIRD
044
071
097
124
TREMOLO STR
CLARINET
SOUNDTRACK
TELEPHONE
045
PIPE
098
CRYSTAL
125
HELICOPTER
PIZZICATO STR
046
HARP
072
PICCOLO
099
ATMOSPHERE
126
APPLAUSE
047
TIMPANI
073
FLUTE
100
BRIGHTNESS
127
GUNSHOT
ENSEMBLE
074
101
SYNTH TONE
RECORDER
GOBLINS
048
STRINGS 1
075
PAN FLUTE
102
ECHOES
128 159
049
STRINGS 2
076
BLOWN BOTTLE
103
SF
DRUM SET
050
077
ETHNIC
160
167
SYNTH-STR 1
SHAKUHACHI
051
078
104
USER TONE
SYNTH-STR 2
WHISTLE
SITAR
052
CHOIR AAHS
079
OCARINA
105
BANJO
168
199
ENVELOPE
(TIE)
PITCH
3
ENVELOPE
00 FLAT
7
8
9
AMP
ENVELOPE
01-19 VIBRATO
000-048 DECAY
4
5
6
REST
20-49 OTHERS
049-137 SUSTAIN
0
1
2
3
CTK-631

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Summary of Contents for Casio CTK-631

  • Page 1 CTK-631 POPS DANCE / FUNK ROCK EUROPEAN LATIN II / VARIOUS PIANO SYNTH-LEAD JAZZ GUITAR VOICE DOO SHAMISEN REVERB DEMO CLUB POP BIG BAND ROCK POLKA 1 SALSA GRAND PIANO CLEAN GUITAR SYNTH-VOICE SQUARE WAVE KOTO EURO POP TRIP HOP...

  • Page 2: Table Of Contents

    CONTENTS Specifications ........................... 1 Block Diagram ..........................3 Circuit Description ..........................4 Adjustment ............................. 11 Major Waveforms ........................... 13 Printed Circuit Boards ........................14 Schematic Diagrams ........................17 Exploded View ..........................24 Parts List ............................25...

  • Page 3: Specifications

    3 reverb types (HALL, STAGE, ROOM) Auto accompaniment Rhythm patterns: Tempo: Variable (216 steps, = 40 to 255) Chords: 4 fingering methods (NORMAL, CASIO CHORD, FINGERED, FULL RANGE CHORD) Rhythm controller: START/STOP, INTRO, NORMAL/NORMAL FILL-IN, VARIATION/VARI- ATION FILL-IN, SYNCHRO/ENDING Accomp volume:...
  • Page 4 ELECTRICAL Current drain with 9 V DC: 412 mA ± 20 % No sound output 1165 mA ± 20 % Maximum volume with 12 keys from C3 to B3 pressed in Square wave tone Volume: maximum, Touch response: maximum Reverb: Hall Phone output level (Vrms with 32 Ω...

  • Page 5: Block Diagram

    BLOCK DIAGRAM SEG1 ~ SEG40 Working Storage LCD Driver RAM (256K-bit) MIDI P10, P13 LSI4 LSI501 P14, P17 TC55257DFL-70L(EL) SED1278F2A COM1 ~ COM16 Reset IC RESET RN5VD40AA FI0 ~ FI9 MA14 SI0 ~ SI9 Keyboard Sound Source ROM MD0 ~ MD15 LSI1 (24M-bit) KC0 ~ KC7...

  • Page 6: Circuit Description

    Stop Tempo Normal/ Chord 5 Intro Fill-In Synchro/ Tempo Variation/ Chord 6 Ending Fill-In Full Range Reverb Mixer Step Chord Accomp Fingered Synth Memory Volume Casio Chord Demo Free Session Split Transpose/ Touch Normal Layer Tune/Midi Response — 4 —...

  • Page 7: Power Supply Circuit

    Note: Each key has two contacts, the first conatct (1) and second contact (2). First contact (1) Second contact (2) NOMENCLATURE OF KEYS 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 G2 A2 C3 D3 G3 A3 B3 C4...
  • Page 8 CPU (LSI1: GT913F-(T)) The 16-bit CPU contains a 1k-byte RAM, three 8-bit I/O ports, two timers, a key controller and serial interfaces. The CPU detects key velocity by counting the time between first-key input signal FI and second-key SI from the keyboard.
  • Page 9 Pin No. Terminal In/Out Function +5 V source Ground (0 V) source MRDB Read enable signal output for the sound source ROM 83 ~ 98 MD0 ~ MD15 In/Out Data bus Reset signal output for the DSP In/Out Data bus for the LCD driver DIGITAL SIGNAL PROCESSOR (LSI2: HG51B227FB-1) The DSP receives 16-bit serial sound data output from the CPU and adds the selected effect to the sound data using the effect RAM.
  • Page 10 Pin No. Terminal In/Out Function 42 , 44, 46 ~ 48, EA0 ~ EA12 Address bus for the effect RAM 51 ~ 59, 61 ECEB Chip enable signal output for the effect RAM EOEB Read enable signal output for the effect RAM VSS3 Ground (0 V) source EWEB...

  • Page 11: Filter Block

    DAC (IC1: UPD6379GR) The DAC receives 16-bit serial data output from the DSP. The data contains digital sound data of the melody, chord, bass, and percussion for the right and left channels. The DAC converts the data into analog waveforms and output them to each channel separately. Synch signal SCK1 SINC...
  • Page 12 POWER AMPLIFIER (IC301: TA8248K) The power amplifier is a two-channel amplifier with standby switch. The following table shows the pin function of IC301. Pin No. Terminal In/Out Function — Not used B.S.2 — Terminal for a bootstrap capacitor OUT2 Channel 2 output +9 V source OUT1 Channel 1 output...

  • Page 13: Adjustment

    ADJUSTMENT DISPLAY PCB 1) Items to be adjusted: Item Measuring Instrument Vop voltage setting Voltmeter 2) Adjustment and Test Point Locations (TOP VIEW) VR501 (BOTTOM VIEW) — 11 —...
  • Page 14 3) Equipment connection/Procedure Vop voltage setting Voltmeter Output TP1-TP2 Output Output Input Input Input Adjust Adjust for Connection Point Point Signal Connection VR501 Voltmeter TP1-TP2 Adjust for 4.2 to 4.3 V read- ing on voltmeter under the temparature 20 to 25 °C. Make fine adjustment accord- ing to the following instruc- tion.

  • Page 15: Major Waveforms

    MAJOR WAVEFORMS 0.5 s 20 ms 1 ms 1 ms Power button ON – – – – ˜ ˜ ˜ ˜ CH1: 5 V CH2: 5 V CH1: 5 V CH2: 5 V CH1: 50 mV CH2: 50 mV CH1: 50 mV CH2: 50 mV 1 NMI signal 3 Button scan signal PA0...

  • Page 16: Printed Circuit Boards

    PRINTED CIRCUIT BOARDS Main PCB JCM454-MA1M Top View Bottom View — 14 —...
  • Page 17 Sub PCB KDM454-MA2M — 15 —...
  • Page 18 LCD PCB JCM454-LCD1M-A Top View Bottom View — 16 —...

  • Page 19: Schematic Diagrams

    SCHEMATIC DIAGRAMS Main PCB JCM454-MA1M — 17 —...
  • Page 20 Sub PCB KDM454-MA2M — 18 —...
  • Page 21 Display PCB JCM454-LCD1M — 19 —...
  • Page 22 Keyboard PCBs JCM617T-KY1M/KY2M — 20 —...
  • Page 23 PCBs JCM454-CN1M, JCM454-CN2M,JCM454-CN3M,JCM454-CN4M — 21 —...
  • Page 24 Common (121.0) V.A. (4.595) 4.625 2.738 3-0.35 cross-point cross-point cross-point cross-point cross-point cross-point (56.0) V.A. 7-0.35 cross-point (3.258) (5.26) 5.26 Segment — 22 —...
  • Page 25 Common Segment 125.0–0.2 9.087 0.15 66.0–0.2 — 23 —...

  • Page 26: Exploded View

    EXPLODED VIEW — 24 —...

  • Page 27: Parts List

    PARTS LIST CTK-631 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. Prices and specifications are subject to change with- out prior notice.
  • Page 28 PARTS PRICE LIST CTK-631 ITEM CODE NO. PARTS NAME SPECIFICATION PRICE CODE MAIN PCB 6927 4340 PCB/ASSY(MA1M) M240991*1 LSI1 2012 5005 LSI/CPU GT913F(T) LSI2 2012 4494 LSI/DSP HG51B277FB-1 LSI3 2012 6336 LSI/ROM LH536PY8 LSI4/LSI5 2012 5572 LSI/RAM TC55257DFL-70L(EL) 2105 4746...
  • Page 29 PARTS PRICE LIST CTK-631 ITEM CODE NO. PARTS NAME SPECIFICATION PRICE CODE PANEL UNIT 6927 4690 RELECTOR M240939-1 3122 3701 HMBV4BG2W147NLUAZG 6927 3420 HOLDER/CFL M440758-1 3335 6822 LD-B10432E 6927 3070 INTERCONNECTOR M440459-4 3831 1096 SPEAKER S12J89A 6927 6180 NET/SPEAKER M340981*1...
  • Page 30 CASIO TECHNO CO.,LTD. Overseas Service Division Nishi-Shinjuku Kimuraya Bldg. 1F 5-25, Nishi-Shinjuku 7-Chome Shinjuku-ku, Tokyo 160-0023, Japan...

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