Casio CTK-2300 User manual

HIGH-GRADE KEYBOARD

CTK-230

SEP. 2003

CTK-230

Ver.1 : Jan. 2004

CONTENTS

Specifications ---------------------------------------------------------------------------------------------- 1

Block Diagram --------------------------------------------------------------------------------------------- 2

Circuit Description --------------------------------------------------------------------------------------- 3

Printed Circuit Board ------------------------------------------------------------------------------------ 4

Disassembly ------------------------------------------------------------------------------------------------ 5

Diagnostic Program-------------------------------------------------------------------------------------- 6

Schematic Diagrams------------------------------------------------------------------------------------- 8

Exploded View ------------------------------------------------------------------------------------------- 10

Parts List--------------------------------------------------------------------------------------------------- 11

— 1 —

SPECIFICATIONS

GENERAL

Keyboard: 49 standard-size keys, 4 octaves

Tones: 100

Polyphony: 12 notes maximum (6 for certain tones)

Auto Accompaniment

Rhythm Patterns: 100

Tempo: Variable (236 steps, = 20 to 255)

Chords: 2 fingering methods (CASIO CHORD, FINGERED)

Rhythm Controller: START/STOP, SYNCHRO/FILL-IN

Accomp Volume: 0 to 9 (10 steps)

Song Bank

Tunes: 50

Controllers: PLAY/PAUSE, STOP, MELODY ON/OFF

Display

Name display: TONE, RHYTHM, SONG BANK name/number, keyboard setting names/

values

Tempo: Tempo value, metronome, synchro standby, beat indicator, volume set-

ting

Chord: Chord name

Song Bank Status: PLAY, PAUSE, MELODY ON/OFF

Other Functions

Transpose: 12 steps (–6 semitones to +5 semitones)

Tuning: Variable (A4 = approximately 440Hz ±50 cents)

Volume: 0 to 9 (10 steps)

Terminals

Phones/Output Terminal: Stereo standard jack (Output is monaural.)

Output Impedance: 78Ω

Output Voltage: 3V (RMS) MAX

Power Supply Terminal: 9V DC

Power Supply: Dual power supply system

Batteries: 6 AA-size batteries

Battery Life: Approximately 6 hours continuous operation on alkaline batteries

Approximately 3 hours continuous operation on manganese batteries

AC Adaptor: AD-5

Auto Power Off: Turns power off approximately 6 minutes after last operation.

Enabled under battery power only, can be disabled manually.

Speaker Output: ø 10cm ×2 (1.6W + 1.6W)

Power Consumption: 9V 6.5W

Dimensions: 87.5 ×30.0 ×10.0 cm (34 1/2×11 13/16 ×3 15/16 inch)

Weight: Approximately 3.2 kg (7.1 lbs) (without batteries)

ELECTRICAL

Current drain with 9 V DC:

No sound output 79 mA ±20 %

Maximum volume 426 mA ±20 %

with 12 keys C3 to G4 pressed in Synth-Lead 1

Volume: 9 (Max.)

Phone output level (Vrms with 32 Ωload each channel):

with key C5 pressed in Synth-Lead 1 200 mV ±20 %

Speaker output level (Vrms with 4 Ωload each channel):

with key E2 pressed in Synth-Lead 1 640 mV ±20 %

Output level (Vrms with 47 KΩload each channel):

with key C5 pressed in Synth-Lead 1 675 mV ±20 %

— 2 —

BLOCK DIAGRAM

MPU

ML6556

IC202

LCD

Power Supply Circuit

Q201 ~ Q203, D204

Power Amp.

LA4227

IC201

Speaker

(L)

Speaker

(R)

Phones/Output

VC AVDDVCC DVDD

APO

KOD8 ~ KOD12

DC + 9 V IN

DB4 ~ DB7 LCD-E

LCD-RW

LCD-RS

KID0 ~ KID6

Buttons

KI0 ~ KI6

Keyboard

Power Switch

—3 —

CIRCUIT DESCRIPTION

KEY MATRIX

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

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

KID0 KID1 KID2 KID3 KID4 KID5 KID6

KOD8 —+0

TEMPO TEMPO VOLUME VOLUME

▼ ▲▼▲

KOD9 321

START/ SYNCRO/ F5 ACCOMP

STOP FILL IN VOLUME

KOD10 654

TRANSPOSE/

SONG RHYTHM TONE

TUNE BANK

KOD11 9 8 7 FINGERED CASIO NORMAL OFF

CHORD

KOD12 E2 MELODY PLAY/ STOP

ON/OFF PAUSE

— 4 —

PRINTED CIRCUIT BOARDS

Main PCB CMW277-MAIN

Top View

Bottom View

JACK PCB CMW277-MA2M

— 5 —

DISASSEMBLY

Main PCB

JACK PCB

SpeakerSpeaker

1. Remove the battery cover and then take out the battery.

2. Remove 7 screws and then the console panel.

3. Remove 12 screws and then the Main PCB.

4. Remove 2 screws and then the JACK PCB.

5. Remove 8 screws and then the Speaker.

— 6 —

■Initial Setting

1. Connect an AC adaptor.

■How to start diagnostic program

1. Press the “POWER” button while pressing the “0 Up” and “START/STOP” buttons.

DIAGNOSTIC PROGRAM

■Diagnostic program

1. MODE Swtich check

1Press “CASIO CHORD” button.

2Press “FINGERED” button.

3Press “NORMAL” button.

2. SWITCH check

1Press “0” button.

2Press the buttons in the following order.

TEST

SONG BANK

TEST

RHYTH

TEST

TONE

TEST

SONG BANK

3 4

5 6

14 15

3OK sound must be audible with the display as Message on LCD

3. ROM check

1Press “2”button.

OK sound must ne audible.

4. ROM Ver. check

1Press “1”button.

Pip sound must be audible.

5. D/A check

1Press “4”button.

Minimum sine wave sound must be audible at center position.

2Press “5”button.

Middle sine wave sound must be audible at center position.

3Press “6”button.

Maximum sine wave sound must be audible at center position.

SWITCH

OKSWIT

Message on LCD

AD-5

ROM TEST

↓

ROM 0000

↓

ROM OK

277Vr170

MIN

MID

MAX

—7 —

Message on LCD

6. LCD check

1Press “TONE”button.

2Press “TONE”button.

*Pip sound must be audible.

The display must be changed to turn on all dots.

3Press “TONE”button.

The display must be changed to no display.

4Press “TONE”button.

The display must be changed to pattern 1 dot matrix.

5Press “TONE”button.

The display must be changed to pattern 2 dot matrix.

6Press “TONE”button.

The display must be changed to pattern 1 characters.

7Press “TONE”button.

The display must be changed to pattern 2 characters.

8Press “TONE”button.

The display must be changed to as remark.

7. AC Adaptor check

1Press “SONG BANK”button.

OK sound must be audible.

8. APO check

1Press “STOP”button.

* Go out from TEST mode (Power off).

* The LCD turns off.

DIAGNOSTIC PROGRAM IS FINISHED.

LCD

TEST

P=AC ADP

— 8 —

SCHEMATIC DIAGRAMS

Main PCB CMW277-MAIM

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