Casio CTK-631 User Manual

CTK-631

INDEX

BACKLIGHT LCD

DIGITAL REVARB

2-WAY MULTI-TRACK MEMORY

POPS IDANCE / FUNK

00 01 02

03 04

8 BEAT BALLAD 2

60'S 8 BEAT

16 BEAT

16 BEAT BALLAD

16 BEAT SHUFFLE

POPS 10

POP 1

POP 2

70'S ROCK 1

POP BALLAD

16 BEAT SOUL

SOUL POP

WORLD POP

FUSION SHUFFLE

6/8 BALLAD

50'S R&B BALLAD

GENERAL

CLUB POP EURO POP 90'S POP 8 BEAT 8 BEAT BALLAD 1

21 22 23

24 25 26

RAVE

TRANCE

DISCO

FUNK

ROCK 30

AMERICAN ROCK

ROCK

70'S ROCK 2

RIFF ROCK

HEAVY METAL

POP ROCK

SOFT ROCK

SLOW ROCK 1

SLOW ROCK 2

ROCK WALTZ

ROCK

RAP

BIG BAND ROCK

TRIP HOP

SHUFFLE ROCK

TECHNO 1

OLDIES POP

TECHNO 2

OLDIES SHUFFLE

FUNKY GROOVE

BOOGIE-WOOGIE

DRUM & BASS

50'S ROCK

TWIST

NEW ORLNS R&R

CHICAGO BLUES

R&B

LATIN

JAZZ 50

BIG BAND 1

BOSSA NOVA 1

BIG BAND 2

BOSSA NOVA 2

SWING 1

SAMBA 1

SWING 2

SAMBA 2

SLOW SWING

BEGUINE

ORCH SWING

MAMBO

FUNKY JAZZ

RHUMBA

JAZZ VOICES

CHA-CHA-CHA

ACID JAZZ

MERENGUE

JAZZ WALTZ

BOLERO

POWER TEMPO

VOLUMEMODE

MAX

FULL RANGE CHORD FINGERED CASIO CHORD

NORMAL

MIN

EUROPEAN 60

POLKA 1

POLKA 2

MARCH 1 MARCH 2

MARCH 3 WALTZ FRENCH WALTZ

BALLROOM WALTZ VIENNESE WALTZ TANGO

LATIN

II /

VARIOUS

REVERB DEMO

SALSA

REGGAE

PUNTA

CUMBIA

PASODOBLE

SYNTH

85 86

87 88 89 VARIOUS 90 91

BLUEGRASS

FAST GOSPEL

SLOW GOSPEL

HAWAIIAN

BROADWAY

EURO FOX

QUICKSTEP

ADANI

BALADI

START/STOP

RUMBA CATALANA

SEVILLANA SKA TEX-MEX TOWNSHIP

COUNTRY

REVERB

HALL

STAGE

MIXER

ROOM SYNTH

MEMORY

MIXER

MEMORY

STEP

ACCOMP

VOLUME

CHORD/1 2 3 4 5 6

ELECTRONIC KEYBOARD

PIANO

026

000

GRAND PIANO

027

001

BRIGHT PIANO

028

002

E GRAND PIANO

003

HONKY-TONK

TRANSPOSE/

004

ELEC PIANO 1

TUNE/MIDI

005

ELEC PIANO 2

006

HARPSICHORD

007

CLAVI

CHROMATIC PERC

FREE

008

CELESTA

SESSION

009

TOUCH RESPONSE

LAYER

TOUCH

RESPONSE

GLOCKENSPIEL

010

MUSIC BOX

011

VIBRAPHONE

012

MARIMBA

013

XYLOPHONE

014

TUBULAR BELLS

015

DULCIMER

ORGAN 016

DRAWBAR ORGAN

017

PERC ORGAN

SPLIT

018

ROCK ORGAN

019

CHURCH ORGAN

020

REED ORGAN

021

ACCORDION

022

HARMONICA

023

BANDONEON

GUITAR 024

NYLON STR GT

025

STEEL STR GT

TONE

RHYTHM

FREE SESSION

LAYER

SPLIT

JAZZ GUITAR

053

VOICE DOO

CLEAN GUITAR

SYNTH-VOICE

054

MUTE GUITAR

055

ORCHESTRA HIT

029

OVERDRIVE GT

BRASS

030

DIST GUITAR

056

TRUMPET

031

GT HARMONICS

057

TROMBONE

BASS

058

TUBA

032

ACOUSTIC BASS

059

MUTE TRUMPET

033

FINGERED BASS

060

FRENCH HORN

034

PICKED BASS

061

BRASS

035

FRETLESS BASS

062

SYNTH-BRASS 1

036

SLAP BASS 1

063

SYNTH-BRASS2

REED

037

SLAP BASS 2

038

SYNTH-BASS 1

064

SOPRANO SAX

039

SYNTH-BASS 2

065

ALTO SAX

066

TENOR SAX

STR/ORCHESTRA 040

VIOLIN

067

BARITONE SAX

041

VIOLA

068

OBOE

042

CELLO

069

ENGLISH HORN

043

CONTRABASS

070

BASSOON

044

TREMOLO STR

071

CLARINET

PIPE

045

PIZZICATO STR

046

HARP

072

047

TIMPANI

073

ENSEMBLE

074

048

STRINGS 1

075

049

STRINGS 2

076

050

SYNTH-STR 1

077

051

SYNTH-STR 2

078

052

CHOIR AAHS

079

REST

0123

SYNTH-LEAD

080 081

082 083

084 085 086

PICCOLO FLUTE RECORDER PAN FLUTE BLOWN BOTTLE SHAKUHACHI

WHISTLE OCARINA

(

TIE)3

SQUARE WAVE SAWTOOTH WAVE

087 SYNTH-PAD

088 089 090 091 092

093 094 095

CALLIOPE CHIFF LEAD CHARANG VOICE LEAD

FIFTH LEAD BASS + LEAD

SYNTH-SFX 096 097 098

099 100 101 102

NEW AGE WARM PAD POLYSYNTH

SPACE CHOIR BOWED GLASS METALLIC PAD

103 ETHNIC 104 105

HALO PAD SWEEP PAD

RAIN DROP SOUNDTRACK

CRYSTAL ATMOSPHERE BRIGHTNESS GOBLINS

106

SHAMISEN

KOTO

107 108

KALIMBA

109

BAG PIPE

110

FIDDLE

111

SHANAI

PERCUSSIVE 112

TINKLE BELL

113

AGOGO

114

STEEL DRUM

115

WOOD BLOCK

116

TAIKO

117

MELODIC TOM

118

SYNTH-DRUM

119

REVERSE CYMBAL

SOUND EFFECTS 120

GT FRET NOISE

121

BREATH NOISE

122

SEASHORE

123

BIRD

124

TELEPHONE

125

HELICOPTER APPLAUSE

126 127

GUNSHOT

SYNTH TONE

ECHOES

128 159

DRUM SET

167

160

SITAR

USER TONE

168

BANJO

199

ENVELOPE

PITCH ENVELOPE

00 FLAT

AMP ENVELOPE

01-19 VIBRATO

000-048 DECAY

20-49 OTHERS

049-137 SUSTAIN

CTK-631

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

SPECIFICATIONS

GENERAL

Keyboard: 61 standard-size keys, 5 octaves (with touch response on/off) Drum pads: 6 Tones: 200 (128 General MIDI, 32 synthesized, 8 drum, 32 user); with layer and

split Rhythm instrument tones: 61 Polyphony: 24 notes maximum (12 for certain tones) Digital effects: 3 reverb types (HALL, STAGE, ROOM) Auto accompaniment

Rhythm patterns: 100 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: 0 to 127 (128 steps)

Free session

Number of patterns: 100 (auto-accompaniment in accordance with selected chord progres-

sion) Memory function

Songs: 2 Recording tracks: 6 (2 through 6 are melody tracks) Recording methods: Real-time, step Memory capacity: Approximately 5,200 notes (total for two songs)

Edit function: Equipped Demo tunes: 2 Synthesizer function

Parameters: PCM set, amp envelope set, attack rate, release rate, pitch envelope set,

pitch, level, touch sense, pan

Mixer function

Channels: 16

Parameters: Program change number, volume, expression, pan, coarse tuning, fine

tuning, on/off/solo MIDI: 16 multi-timbre receive, GM Level 1 standard Other functions

Pitch bend range: 12 semitones upwards and downwards Transpose: 25 steps (–12 semitones to +12 semitones) Tuning: Variable (A4 = approximately 440 Hz ± 50 cents)

Terminals

MIDI terminals: IN, OUT Assignable terminal: Standard jack (sustain, sostenuto, soft, rhythm start/stop) Headphone/Output terminal: Stereo standard jack

Output Impedance: 120 Ω

Output Voltage: 4.5 V (RMS) MAX

Power supply terminal: 9 V DC

Power supply: Dual power supply system

Batteries: 6 D-size batteries Battery life: Approximately 5 hours continuous operation on manganese batteries AC adaptor: AD-5 Auto power off: Turns power off approximately six minutes after last key operation. En-

abled under battery power only, can be disabled manually. Speaker output: 2.5 W + 2.5 W Power consumption: 9 V --- 7.7 W Dimensions (HWD): 96.0 × 37.6 × 15.2 cm (37 13/16 × 14 13/16 × 5 15/16 inches) Weight: Approximately 5.5 kg (12.1 lbs) (without batteries)

— 1 —

ELECTRICAL

Current drain with 9 V DC: No sound output 412 mA ± 20 % Maximum volume 1165 mA ± 20 %

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 load each channel): L-ch 615 mV ± 20 %

with key A5 pressed in Bassoon tone R-ch 555 mV ± 20 % Volume: maximum, Touch response: maximum Reverb: Hall

Speaker output level (Vrms with 4 Ω load each channel): L-ch 2780 mV ± 20 %

with key A5 pressed in Bassoon tone R-ch 2570 mV ± 20 % Volume: maximum, Touch response: maximum Reverb: Hall

Output level (Vrms with 47k Ω load each channel): L-ch 3070 mV ± 20 %

with key A5 pressed in Bassoon tone R-ch 2750 mV ± 20 % Volume: maximum, Touch response: maximum Reverb: Hall

Minimum operating voltage: 6.3 V

About General MIDI

General MIDI standardizes MIDI data for all sound source types, regardless of manufacturer. General MIDI specifies such factors as tone numbering, drum sounds, and available MIDI channels for all sound sources. This standard makes it possible for all MIDI equipment to reproduce the same nuances when playing General MIDI data, regardless of the manufacturer of the sound source. This keyboard supports General MIDI, so it can be used to play commercially available pre-recorded General MIDI data and General MIDI data send to it from a personal computer.

— 2 —

BLOCK DIAGRAM

Reset IC

IC2

RN5VD40AA

Sound Source ROM

(24M-bit)

LSI3

LH536PY8

Effect RAM

(256K-bit)

LSI5

TC55257DFL-

70L(EL)

RESET

MA0 ~ MA19

MA0, MA1

EA0 ~ EA14

EIO0 ~ EIO7

Working Storage

RAM (256K-bit)

LSI4

TC55257DFL-70L(EL)

MA0

MA14

MD0 ~ MD15

MD0

MD7

DSP LSI2

HG51B277FB-1

MIDI

LRCK, SO BCK, SINK

INOUT

CPU LSI1

GT913F(T)

P10, P13 P14, P17

P23

NMI

PA0 ~ PA5

PB0 ~ PB3

LCD Driver

LSI501

SED1278F2A

FI0 ~ FI9 SI0 ~ SI9

KC0 ~ KC7

KI0 ~ KI2 PB0 ~ PB3

FI10

VDD

SEG1 ~ SEG40

LCD

COM1 ~ COM16

Keyboard

Power Switch

Buttons

Speakers

Output

WCKO SO BCK

D/A Converter

IC1

UPD6379GR

Filter

Q308 ~ Q311

Main Volume

Power Amplifier

IC301

TA8248K

PB4

Assingnable Jack

— 3 —

CIRCUIT DESCRIPTION

KEY MATRIX

KC0 KC1 KC2 KC3 KC4 KC KC6 KC7

FI0 C2 (1) C#2 (1) D2 (1) D#2 (1) E2 (1) F2 (1) F#2 (1) G2 (1) SI0 C2(2) C#2 (2) D2 (2) D#2 (2) E2 (2) F2 (2) F#2 (2) G2 (2) FI1 G#2 (1) A2 (1) A#2 (1) B2 (1) C3 (1) C#3 (1) D3 (1) D#3 (1) SI1 G#2 (2) A2 (2) A#2 (2) B2 (2) C3 (2) C#3 (2) D3 (2) D#3 (2) FI2 E3 (1) F3 (1) F#3 (1) G3 (1) G#3 (1) A3 (1) A#3 (1) B3 (1) SI2 E3 (2) F3 (2) F#3 (2) G3 (2) G#3 (2) A3 (2) A#3 (2) B3 (2) FI3 C4 (1) C#4 (1) D4 (1) D#4 (1) E4 (1) F4 (1) F#4 (1) G4 (1) SI3 C4 (2) C#4 (2) D4 (2) D#4 (2) E4 (2) F4 (2) F#4 (2) G4 (2) FI4 G#4 (1) A4 (1) A#4 (1) B4 (1) C5 (1) C#5 (1) D5 (1) D#5 (1) SI4 G#4 (2) A4 (2) #4 (2) B4 (2) C5 (2) C#5 (2) D5 (2) D#5 (2) FI5 E5 (1) F5 (1) F#5 (1) G5 (1) G#5 (1) A5 (1) A#5 (1) B5 (1) SI5 E5 (2) F5 (2) F#5 (2) G5 (2) G#5 (2) A5 (2) A#5 (2) B5 (2) FI6 C6 (1) C#6 (1) D6 (1) D#6 (1) E6 (1) F6 (1) F#6 (1) G6 (1) SI6 C6 (2) C6# (2) D6 (2) D#6 (2) E6 (2) F6 (2) F#6 (2) G6 (2) FI7 G#6 (1) A6 (1) A#6 (1) B6 (1) C7 (1) SI7 G#6 (2) A6 (2) A#6 (2) B6 (2) C7 (2)

BUTTON MATRIX

KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7

FI10 Chord 3 Chord 1 ▼ 9 6 + Tone

KI0 Chord 4 Chord 2

KI1 Chord 5 Intro

KI2 Chord 6

PA0 PA1 PA2 PA3

PB0

PB1 Fingered Synth Memory

Full Range

Chord

Synchro/ Tempo

Ending ▲ Fill-In

Reverb Mixer Step

Tempo

▼ Fill-In

Start/

Stop

▼

8 3 — Rhythm

Normal/

72 0

Variation/

45 1

Accomp

Volume

PB2 Casio Chord Demo Free Session Split

PB3 Normal

Transpose/

Tune/Midi Response

Layer

— 4 —

Touch

Note: Each key has two contacts, the first conatct (1) and second contact (2).

NOMENCLATURE OF KEYS

Key

Second contact (2)

First contact (1)

KC SI

C#2

C2 D2E2F2

F#2D#2

A2 B2 C3 D3

C#3A#2G#2

F#3 G#3

D#3

F3 G3 A3 B3 C4 D4 E4 F4 G4 A4 B4 C5 D5 E5 F5 G5 A5 B5

A#3 C#4 D#4

F#4 G#4

A#4

C#5

D#5

F#5 G#5

A#5

C#6

G#6F#6D#6

A#6

B6A6G6F6E6D6

POWER SUPPLY CIRCUIT

The power supply circuit generates five voltages as shown in the following table. VDD voltage is always generated. The others are controlled by APO signal from the CPU.

Name Voltage For operation of

VDD +5 V CPU, Reset IC, DSP, Sound source ROM, Working storage RAM, Effect RAM DVDD +5 V LCD driver, Power jack, Sustain jack, MIDI jack AVDD +5 V DAC, Filter

LVDD +5.6 V LCD dirver

VCC +9 V Power amplifier, Pilot lamp

RESET CIRCUIT

When batteries are set or an AC adapter is connected, the reset IC provides a low pulse to the CPU. The CPU then initializes its internal circuit, and clears the working storage RAM. When the power switch is pressed, the CPU receives a low pulse of POWER signal. The CPU sends APO signal to the power supply circuit, also sends a reset signal to the DSP.

Battery set

VDD

Reset IC

IC2

RN5VD40AA

POWER

From power switch

RESET

GT913F(T)

NMI

CPU

LSI1

VDD

Reset signal

PLE

HG51B277FB-1

APO

SCKO

To power supply circuit

— 5 —

VDD

DSP LSI2

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. The CPU reads sound data and velocity data from the sound source ROM in accordance with the selected tone; the CPU can read rhythm data simultaneously when a rhythm pattern is selected. Then the CPU provides 16-bit serial sound data to the DSP. The CPU also controls MIDI input/output and stores sequencer data into the working storage RAM. The following table shows the pin functions of LSI1.

Pin No. Terminal In/Out Function

1 TXD0 Out MIDI signal output 2 RXD0 In MIDI signal input 3 SCK0 Out APO (Auto Power Off) signal output

4, 5 TXD1, RXD2 In/Out Data bus for the LCD driver

6 SCK1 Out 1 MHZ synchronizing pulse output 7 AVCC In DVDD (+5 V) source

AC adaptor detection terminal.

8 AN0 In

9 AN1 — Not used. Connected to ground. 10 AGND In Ground (0 V) source 11 BCK Out Bit clock output 12 SO Out Serial sound data output 13 LRCK Out Word clock output 14 GND In Ground (0 V) source

15, 16 XLT0, XLT1 In/Out 20 MHz clock input/output

17 VCC In +5 V source

18, 19 MD0, MD1 In Mode selection terminal

20 RSTB In Reset signal input 21 NMI In Power ON signal input 22 INT/P10 In/Out Data bus for the LCD driver

23 ~ 30 31 ~ 38 KC0 ~ KC7 Out Terminal for key scan signal

39 ~ 46

47 ~ 50

51 FI10 In Terminal for button input signal 52 SI10/P23 Out Chip enable signal for the LCD driver

53 ~ 55 KI0 ~ KI2 In Terminal for button input signal

56 MWNB Out Write enable signal for the DSP

57 ~ 76 MA0 ~ MA17 Out Address bus

77 MCSB0 Out Chip enable signal output for the sound source ROM 78 MCSB1 Out Not used 79 MCSB2 Out Chip enable signal output for the DSP

FI0 ~ FI3 SI0 ~ SI3

FI4 ~ FI7 SI4 ~ SI7

FI8, FI9

SI8, SI9

In Terminal for key input signal

— Not used

+5 V when the keyboard is powered by batteries and becomes

V to cancel the APO function when AC adaptor is connected.

— 6 —

Pin No. Terminal In/Out Function

80 VCC In +5 V source 81 GND In Ground (0 V) source 82 MRDB Out Read enable signal output for the sound source ROM

83 ~ 98 MD0 ~ MD15 In/Out Data bus

99 PLE Out Reset signal output for the DSP

100 P17 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. Then the DSP provides the sound data to the DAC. The DSP also controls button input/ output. The following table shows the pin functions of LSI2.

Pin No. Terminal In/Out Function

1 ~ 3, 80 PB0 ~ PB3 In Button input terminals

4 PB4 In ASSIGNABLE Jack input 5 SO Out Serial sound data output for the DAC 6 WCKO Out Word clock output for the DAC 7 VDD3 In +5 V source 8 TEST — Not used 9 RESB In Reset signal input

10 VSS2 In Ground (0 V) source

11, 12 XIN, XOUT In/Out 20 MHz clock input/output

13 WCKI In Word clock input from the CPU 14 SI In Serial sound data input from the CPU 15 BCKI In Bit clock input from the CPU 16 SINC In 1 MHz synchronizing pulse input 17 VDD2 In +5 V source

18 ~ 25 IO0 ~ IO7 In/Out Data bus

26 RCEB Out Chip enable signal output for the working storage RAM 27 VSS3 In Ground (0 V) source 28 AD1 In Address bus 29 OEB Out Output enable signal for working storage RAM 30 WEB In Write enable signal 31 VDD3 In +5 V source 32 CE2 In Chip enable signal input. High active. 33 AD0 In Address bus 34 CE1B In Chip enable signal input. Low active.

35 ~ 41, 43 EIO0 ~ EIO7 In/Out Data bus for the effect RAM

— 7 —

+ 21 hidden pages