CASIO CTK620L - Service Manual Immediate Download

ELECTRONIC KEYBOARD

CTK-620L

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TEMPO

SYNCHRO/ENDING

INTRO

VOLUME

MODE

POWER

MAX

FULL RANGE

CHORD

FINGERED

CASIO CHORD

NOMAL

MIN

NORMAL/FILL-IN

VARIATION/FILL-IN

START/STOP

REVERB

TOUCH

RESPONSE

METRONOME

BEAT

ACCOMP

VOLUME

RHYTHMS

TONE

SONG

BANK

DEMO

SONG BANK

TONE

78

9

45

6

12

3

0

12

3

RHYTHM

TRACK 1

LEFT

STEP 1

STEP

MEMORY

SPLIT

LAYER

TRANSPOSE/

TUNE/MIDI

STEP 2

STEP 3

TRACK 2

RIGHT

3-STEP LESSON

REST

3

(TIE)

REVERB

MUSICAL INFORMATION SYSTEM

SONG BANK CONTROLLER

KEY LIGHT

HALL

STAGE

ROOM

TOUCH

RESPONSE

KEY LIGHT

STOP

PLAY/PAUSE

REW

FF

GM

LAYER

SPLIT

MEMORY

STEP

100 SONG BANK

137 TONES

100 RHYTHMS

-- 1 --

SPECIFICATIONS

GENERAL

Keyboard:

61 standard-size keys, 5 octaves (with touch response on/off)

Key light system:

Can be turned on and off (up to 10 keys can be lit at the same time)

Tones:

137 (128 General MIDI tones + 9 drum tones); 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:

3 fingering methods (CASIO CHORD, FINGERED, FULL RANGE

CHORD)

Rhythm controller:

START/STOP, INTRO, NORMAL/NORMARL FILL-IN, VARIATION/

VARIATION FILL-IN, SYNCHRO/ENDING

Accomp volume:

0 to 127 (128 steps)

3-step lesson:

3 lessons (step 1, 2, 3)

Playback:

Repeat play of a single tune

Song bank

Number of tunes:

100

Controllers:

PLAY/PAUSE, STOP, FF, REW, LEFT, RIGHT

Musical information function:

Tone, Auto Accompaniment, Song Bank numbers and names; staff nota-

tion, tempo, metronome, measure and beat number, step lesson display,

chord name, dynamic mark, fingering, pedal operation

Metronome:

On/Off

Beat specification:

1 to 6

Memory

Songs:

2

Recording tracks:

2

Recording methods:

Real-time, step

Memory capacity:

Approximately 5,200 notes (total for two songs)

MIDI:

16 multi-timbre receive, GM Level 1 standard

Other functions

Transpose:

25 steps (12 semitones to +12 semitones)

Tuning:

101 steps (A4 = approximately 440 Hz

± 50 cents)

Terminals

MIDI terminals:

IN, OUT

Assignable jack:

Standard jack (sustain, sostenuto, soft, rhythm start/stop)

Headphone/output terminal:

Stereo standard jack

Output Impedance:

100

Output voltage:

4.5 V (RMS) MAX

CONTENTS

Page

Specifications ............................................................................................................................................ 1

Block Diagram ........................................................................................................................................... 3

Circuit Description ..................................................................................................................................... 4

Adjustment .............................................................................................................................................. 12

Major Waveforms .................................................................................................................................... 13

Printed Circuit Boards ............................................................................................................................. 14

Schematic Diagrams ............................................................................................................................... 15

Exploded View ........................................................................................................................................ 28

Parts List ................................................................................................................................................. 29

-- 2 --

ELECTRICAL

Current drain with 9 V DC:

No sound output

200 mA

± 20 %

Maximum volume

1090 mA

± 20 %

with 10 keys from F1 to A2 pressed in French Horn

Volume: maximum, Touch response: maximum

Reverb: stage

Speaker output level (Vrms with 4

load each channel):

with key C1 for R-ch, F1 for L-ch in French Horn

Volume: maximun, Touch response: maximum

2300 mV

± 20 %

Reverb: stage

Phone output level (Vrms with 8

load each channel):

with key C1 for R-ch, F1 for L-ch in French Horn

Volume: maximun, Touch response: maximum

180 mV

± 20 %

Reverb: stage

Output level (Vrms with 47

load each channel):

with key C1 for R-ch, F1 for L-ch in French Horn

Volume: maximun, Touch response: maximum

2600 mV

± 20 %

Reverb: stage

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.

Power jack

9 V DC

Power supply:

2-way

Batteries:

Six 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):

96.1

× 39.1 × 14.4 cm (37 7/8 × 15 3/8 × 5 11/16 inches)

Weight:

Approximately 6.0 kg (13.25 lbs) (without batteries)

-- 3 --

BLOCK DIAGRAM

KC0 ~ KC7

FI0 ~ FI7

SI0 ~ SI7

KI0 ~ KI2

MD0 ~ 3

L0

~ L20

L21

~ L23

MA0 ~ 2

PO10, PO17

PO22, PO23

PA4 ~ PA6

Working Storage

RAM (256K-bit)

LSI4

TC55257DFL-70L(EL)

MIDI

EA0 ~

EA14

EIO0 ~

EIO7

Sound Source ROM

(24M-bit)

LSI3

LH536PNV

LRCK

SO

BCK

D/A Converter

LSI6

UPD6379GR-E1

Filter

Q213 ~ Q216

Main

Volume

Power Amplifier

IC201

TA8229K

Keyboard

LED

Illuminant

MA0 ~ MA19

MCSB0

MCSB0, 1

MA19

Power Supply Circuit

Q201 ~ Q208,

D206 ~ 208, D210

VCC

AVDD

VDD

VC

DVDD

VLCC

LVDD

LCDD

APO

L OUT

R OUT

Effect RAM

(256K-bit)

LSI5

TC55257DFL-

70L(EL)

MD0

~

MD7

Speakers

(L)

(R)

Phones/

Output

MA0

~

MA14

MA0,

MA1

LRCK, SO

BCK, SINK

LCD

LCD Driver

LSI401

SED1278F0A

SEG1 ~ SEG40

IN

OUT

Reset IC IC1

RN5VD40AA

Chip Selector

IC2,3

RESET

COM1 ~ COM16

DSP

LSI2

HG51B277FB-1

MD0 ~ MD15

Buttons

Assingnable Jack

PB4

VDD

Power Switch

NMI

LCBE

FI9

FI10

PA0, PA1

PB0 ~ PB3

LED

Driver

Q1 ~ Q11

LED

Driver

Q12 ~ Q14

CPU

LSI1

GT913F(T)

GA

LSI7

UPD65005

GF-419

ECEB

CE1B

RACEB

RDCEB

-- 4 --

CIRCUIT DESCRIPTION

KEY MATRIX

BUTTON MATRIX

KC0

KC1

KC2

KC3

KC4

KC5

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)

A#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)

PA0

PA1

PB0

INTRO

PB1

FINGERED

PB2

PB3

NORMAL

FULL RANGE

CHORD

NORMAL

FILL-IN

VARIATION

FILL-IN

CASIO

CHORD

START/

STOP

KC0

KC1

KC2

KC3

KC4

KC5

KC6

KC7

KI0

MEMORY

STEP 2

3

TONE

5

KI1

STEP

STEP 3

--

7

6

ACC. VOL.

TIME

METRO

KI2

STEP 1

0

+

4

DEMO

TOUCH

REVERB

FI9

2

RHYTHM

9

KEYLIGHT

FI10

SPLIT

1

SONG

8

SYNCHRO/

ENDING

LAYER

TRACK 1/

RIGHT

TRANSPOSE/

TUNE/MIDI

TRACK 1/

LEFT

TEMPO

PLAY/PAUSE

FF

REWIND

STOP