Casio CTK-631 Manuale utente

ELECTRONIC KEYBOARD

CTK-631

ENVELOPE

AMP

00 FLAT

01-19 VIBRATO

20-49 OTHERS

000-048 DECAY

049-137 SUSTAIN

PITCH

REST

(TIE)3

0123

456

TONE

RHYTHM

PIANO

BASS

BRASS

REED

STR/ORCHESTRA

ENSEMBLE

ORGAN

GUITAR

CHROMATIC PERC

000

GRAND PIANO

001

BRIGHT PIANO

003

HONKY-TONK

004

ELEC PIANO 1

005

ELEC PIANO 2

006

HARPSICHORD

007

CLAVI

008

CELESTA

009

GLOCKENSPIEL

010

MUSIC BOX

011

VIBRAPHONE

012

MARIMBA

013

XYLOPHONE

015

DULCIMER

014

TUBULAR BELLS

016

DRAWBAR ORGAN

017

PERC ORGAN

018

ROCK ORGAN

020

REED ORGAN

021

ACCORDION

022

HARMONICA

023

BANDONEON

024

NYLON STR GT

025

STEEL STR GT

019

CHURCH ORGAN

002

E GRAND PIANO

027

CLEAN GUITAR

026

JAZZ GUITAR

028

MUTE GUITAR

030

DIST GUITAR

031

GT HARMONICS

032

ACOUSTIC BASS

033

FINGERED BASS

034

PICKED BASS

035

FRETLESS BASS

036

SLAP BASS 1

037

SLAP BASS 2

038

SYNTH-BASS 1

039

SYNTH-BASS 2

041

VIOLA

042

CELLO

040

VIOLIN

043

CONTRABASS

044

TREMOLO STR

045

PIZZICATO STR

047

TIMPANI

048

STRINGS 1

049

STRINGS 2

050

SYNTH-STR 1

051

SYNTH-STR 2

052

CHOIR AAHS

046

HARP

029

OVERDRIVE GT

PIPE

054

SYNTH-VOICE

053

VOICE DOO

055

ORCHESTRA HIT

056

TRUMPET

057

TROMBONE

058

TUBA

059

MUTE TRUMPET

060

FRENCH HORN

061

BRASS

062

SYNTH-BRASS 1

063

SYNTH-BRASS2

064

SOPRANO SAX

065

ALTO SAX

066

TENOR SAX

068

OBOE

069

ENGLISH HORN

067

BARITONE SAX

070

BASSOON

071

CLARINET

073

FLUTE

074

RECORDER

075

PAN FLUTE

076

BLOWN BOTTLE

077

SHAKUHACHI

078

WHISTLE

079

OCARINA

072

PICCOLO

SYNTH-LEAD

SYNTH-PAD

SYNTH-SFX

ETHNIC

080

SQUARE WAVE

081

SAWTOOTH WAVE

082

CALLIOPE

083

CHIFF LEAD

084

CHARANG

085

VOICE LEAD

086

FIFTH LEAD

087

BASS + LEAD

088

NEW AGE

089

WARM PAD

090

POLYSYNTH

091

SPACE CHOIR

092

BOWED GLASS

093

METALLIC PAD

095

SWEEP PAD

094

HALO PAD

096

RAIN DROP

097

SOUNDTRACK

098

CRYSTAL

100

BRIGHTNESS

101

GOBLINS

102

ECHOES

103

104

SITAR

105

BANJO

099

ATMOSPHERE

SYNTH TONE

DRUM SET

USER TONE

PERCUSSIVE

SOUND EFFECTS

107

KOTO

106

SHAMISEN

108

KALIMBA

109

BAG PIPE

110

FIDDLE

111

SHANAI

112

TINKLE BELL

113

AGOGO

114

STEEL DRUM

115

WOOD BLOCK

116

TAIKO

117

MELODIC TOM

118

SYNTH-DRUM

119

REVERSE CYMBAL

121

BREATH NOISE

122

SEASHORE

120

GT FRET NOISE

123

BIRD

124

TELEPHONE

125

HELICOPTER

127

GUNSHOT

128 159

167

199

160

168

126

APPLAUSE

START/STOP

POWER TEMPO

VOLUMEMODE

FULL RANGE

BACKLIGHT LCD

DIGITALREVARB

2-WAYMULTI-TRACK MEMORY

CHORD

FINGERED

CASIO CHORD

NORMAL

MAX

MIN

POPS

DANCE / FUNK

POPS

CLUB POP

EURO POP

90'S POP

8 BEAT

8 BEAT BALLAD 1

8 BEAT BALLAD 2

60'S 8 BEAT

16 BEAT

16 BEAT BALLAD

16 BEAT SHUFFLE

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

ROCK

RAP

TRIP HOP

TECHNO 1

TECHNO 2

FUNKY GROOVE

DRUM & BASS

RAVE

TRANCE

DISCO

FUNK

AMERICAN ROCK

ROCK

70'S ROCK 2

RIFF ROCK

HEAVY METAL

POP ROCK

SOFT ROCK

SLOW ROCK 1

SLOW ROCK 2

ROCK WALTZ

ROCK

JAZZ

BIG BAND ROCK

SHUFFLE ROCK

OLDIES POP

OLDIES SHUFFLE

BOOGIE-WOOGIE

50'S ROCK

TWIST

NEW ORLNS R&R

CHICAGO BLUES

R&B

BIG BAND 1

BIG BAND 2

SWING 1

SWING 2

SLOW SWING

ORCH SWING

FUNKY JAZZ

JAZZ VOICES

ACID JAZZ

JAZZ WALTZ

EUROPEAN

LATIN

POLKA 1

POLKA 2

MARCH 1

MARCH 2

MARCH 3

WALTZ

FRENCH WALTZ

BALLROOM WALTZ

VIENNESE WALTZ

TANGO

BOSSA NOVA1

BOSSA NOVA2

SAMBA 1

SAMBA 2

BEGUINE

MAMBO

RHUMBA

CHA-CHA-CHA

MERENGUE

BOLERO

LATIN

II /

VARIOUS

SALSA

REGGAE

PUNTA

CUMBIA

PASODOBLE

RUMBA CATALANA

SEVILLANA

SKA

TEX-MEX

TOWNSHIP

COUNTRY

BLUEGRASS

FAST GOSPEL

SLOW GOSPEL

HAWAIIAN

BROADWAY

EURO FOX

QUICKSTEP

ADANI

BALADI

GENERAL

REVERB DEMO

TRANSPOSE/

TUNE/MIDI

FREE

SESSION

FREE

SESSION

LAYER

SPLIT

CHORD/1 2 3 4 5 6

SPLIT

TOUCH

RESPONSE

TOUCH

RESPONSE

REVERB

HALL

STAGE

ROOM

SYNTH

MIXER

MEMORY

STEP

SYNTH

MIXER

MEMORY

STEP

ACCOMP

VOLUME

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

— 1 —

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)

— 2 —

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 Ωload 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 Ωload 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 Ωload 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.

— 3 —

BLOCK DIAGRAM

KC0 ~ KC7

FI0 ~ FI9

SI0 ~ SI9

KI0 ~ KI2

PB0 ~ PB3

P10, P13

P14, P17

Working Storage

RAM (256K-bit)

LSI4

TC55257DFL-70L(EL)

MIDI

EA0 ~

EA14

EIO0 ~

EIO7

Sound Source ROM

(24M-bit)

LSI3

LH536PY8

WCKO

BCK

D/A Converter

IC1

UPD6379GR

Filter

Q308 ~ Q311

Main

Volume

Power Amplifier

IC301

TA8248K

Keyboard

MA0 ~ MA19

Effect RAM

(256K-bit)

LSI5

TC55257DFL-

70L(EL)

MD0

MD7

Speakers

Output

MA0

MA14

MA0, MA1 LRCK, SO

BCK, SINK

LCD

LCD Driver

LSI501

SED1278F2A

SEG1 ~ SEG40

INOUT

Reset IC

IC2

RN5VD40AA

RESET

COM1 ~ COM16

DSP

LSI2

HG51B277FB-1

MD0 ~ MD15 CPU

LSI1

GT913F(T)

Buttons

Assingnable Jack

PB4

VDD Power Switch

NMI

FI10

P23

PA0 ~ PA5

PB0 ~ PB3

— 4 —

KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7

FI10 Chord 3 Chord 1 ▼9 6 + Tone

KI0 Chord 4 Chord 2 Start/ 8 3 — Rhythm

Stop

KI1 Chord 5 Intro Tempo 72 0

Normal/

▼Fill-In

KI2 Chord 6 Synchro/ Tempo 45 1

Variation/

Ending ▲Fill-In

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)

CIRCUIT DESCRIPTION

KEY MATRIX

BUTTON MATRIX

PA0 PA1 PA2 PA3

PB0 Full Range Reverb Mixer Step

Chord

PB1 Fingered Synth Memory Accomp

Volume

PB2 Casio Chord Demo Free Session Split

PB3 Normal Transpose/ Layer Touch

Tune/Midi Response

▼

— 5 —

Reset IC

IC2

RN5VD40AA

DSP

LSI2

HG51B277FB-1

VDD

Reset signal

To power supply circuit

VDD Battery set

RESET

VDD

POWER

From power switch NMI

APO

PLE

CPU

LSI1

GT913F(T)

SCKO

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

C2 D2 E2 F2 G2 A2 B2 C3 D3 E3 B6A6G6F6E6D6 C7

C#3A#2G#2

F#2D#2

C#2 A#6

G#6F#6D#6

C#6

Key

Second contact (2) First contact (1) FI

Note: Each key has two contacts,

the first conatct (1) and second contact (2).

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.

NOMENCLATURE OF KEYS

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.

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

— 6 —

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

8 AN0 In AC adaptor detection terminal.

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

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

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 FI0 ~ FI3 In Terminal for key input signal

SI0 ~ SI3

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

39 ~ 46 FI4 ~ FI7 In Terminal for key input signal

SI4 ~ SI7

47 ~ 50 FI8, FI9 — Not used

SI8, SI9

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

— 7 —

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

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

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

— 8 —

LCD DRIVER (LSI501: SED1278F2A)

The LCD driver can drive a dot matrix LCD having 40 segment and 16 common lines. The LSI contains 240

graphic symbols in the built-in character generator ROM, and stores 80 characters in the built-in display data

RAM. In accordance with command from the CPU, the LSI is capable of displaying up to 16 characters

simultaneously. The following table shows the pin functions of LSI 501.

Pin No. Terminal In/Out Function

42 , 44, 46 ~ 48, EA0 ~ EA12 Out Address bus for the effect RAM

51 ~ 59, 61

45 ECEB Out Chip enable signal output for the effect RAM

49 EOEB Out Read enable signal output for the effect RAM

50 VSS3 In Ground (0 V) source

60 EWEB Out Write enable signal output for the effect RAM

62, 66, 70, 74, 78 VSS2 In Ground source

63, 67, 71, 75, 79 VDD2 In +5 V source

64, 65, 68, 69, PA0 ~ PA5 Out Button scan signal output

72, 73

76, 77 PA6/7 Out Not used

Pin No. Terminal In/Out Function

1 ~ 22, SEG1 ~ SEG40 Out Segment signal output

63 ~ 80

23 VSS — GND (0 V) source

24, 25 OSC1, OSC2 In/Out Terminals for the built-in clock pulse generator. The external

resistor connected determines the oscillation frequency.

26 ~ 30 V1 ~ V5 In LCD drive voltage input.

Those voltages are used for generating the stepped pulse of

the LCD drive signals.

31, 32 LP, XCLS — Not used

33 VDD In DVDD (+5 V) source

34, 35 FR, DO — Not used

36 RS In Data/command determination terminal.

High: data, Low: command

37 R/W In Read/write terminal. High: read, Low: write

38 E In Chip enable signal.

High: enable, the writing is done at fall edge.

Low: disenable

39 ~ 42 DB0 ~ DB3 — Not used. Connected to GND (0 V)

43 ~ 46 DB4 ~ DB7 In/Out Data bus

47 ~ 62 COM1 ~ COM16 Out Common signal/output

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