Casio Celviano AP-24 Manuale utente

ELECTRONIC KEYBOARD

AP-24

JUN. 2004

AP-24

CONTENTS

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

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

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

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

Disassembly ------------------------------------------------------------------------------------------------ 6

Diagnostic Program------------------------------------------------------------------------------------ 15

Schematic Diagrams----------------------------------------------------------------------------------- 17

Exploded View ------------------------------------------------------------------------------------------- 26

Parts List--------------------------------------------------------------------------------------------------- 28

— 1 —

SPECIFICATIONS

GENERAL

Keyboard: 88 piano keys (with touch response)

Polyphony: 32 notes, maximum

Tones: 10 tones (including two low-range tones for split), with layer and split

Digital Effects: Reverb (4 types), Chorus (4 types)

Demo Tunes: • Number of Tunes: 8

• Playback: Repeat (all tunes)

User Songs: • Number of Songs: Up to 10 download songs

• Capacity: Approximately 7600 notes (45 kilobytes)

Memory: • Operations: Real-time recording, playback

• Capacity: Approximately 5,200 notes (2 tracks)

• Memory Backup: Built-in lithium battery (Battery Life: 5 years)

Pedals: Damper, Soft/Sostenuto (Selectable)

Other Functions: • Metronome: Beat (6 types), Tempo ( = 30 to 255)

• Touch Select: 3 types, off

• Transpose: 1 octave (F# to C to F)

• Tuning:A4 = 440Hz ±50 cents (adjustable)

MIDI: 16 multi-timbre receive

Input/Output: • Headphones: Stereo standard jacks ×2

• MIDI (OUT) (IN)

Speakers: ø12cm ×2 (Output: 20 W + 20 W)

Power Supply: AP-24: 120V

AP-24V: 220-240V

Power Consumption: AP-24: 55W

AP-24V: 58W

Dimensions: • Digital Piano (without stand): 137.2 u 42.3 u 20.5 cm (54 1/16 ×16 11/16 ×8 1/16 inch)

• Digital Piano: 138.5 ×43.2 ×81.0 cm (54 9/16 ×17 ×31 15/16 inch)

Weight: • Digital Piano (without stand): approximately 34.0 kg (75.0 lbs)

•Digital Piano: Approximately 44.0 kg (97.0 lbs)

— 2 —

BLOCK DIAGRAM

Power AMP

LA4636

IC203

Filter

NJM2068M

IC12

D/A Converter

UPD63200GS

IC8

RESET

IC15, Q7

Filter

NJM2068M

IC11

ROM(8MB)

MR27V3202F 16NTNZ08

IC5

Main Volume

Mute

BCK, SD0, LRCK

RXDITXDO

HEADPHONE

MIDI

Keyboard

LED

Button/LED Controller

UPD65881GK-002-9ET

IC601

MPU

ML6763B-NNTC-116

IC4

Button

OUT

PEDAL

FI0~10

SI0~10

KC0~7

MA1~20

MD0~15

RAM(128K×16 Static RAM)

CY62126DV30LL55ZIT

IC6

VD5(5V)

VA15(15V)

Power Supply

IC202, Q205, D207

MA1~16

MD0~15

SPSP

RESET

MOUT

MIN

DAMP, SOFT, STENT

LINE OUT

LINE IN

Filter

NJM2068M

IC205

Filter

NJM2068M

IC204

—3 —

CIRCUIT DESCRIPTION

KEY MATRIX

LSI (IC4)

ML6763B-NNTC-116

Second contact First contact

NOMENCLATURE OF KEYS

F#3G#3A#3 C#4D#4 F#4G#4A#4 C#5D#5 F#5G#5A#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#2F#2D#2C#2

C1 D1 E1 F1 G1 A1 B1A0 B0

A#1A#0 G#1F#1D#1C#1 A#6G#6F#6D#6C#6

B7A7G7F7E7D7 C8

A#7G#7F#7D#7

C#7

BUTTON MATRIX

KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7

FI0 A01A0#1B01C11C1#1D11D1#1E11

SI0 A02A0#2B02C12C1#2D12D1#2E12

FI1 F11F1#1G11G1#1A11A1#1B11C21

SI1 F12F1#2G12G1#2A12A1#2B12C22

FI2 C2#1D21D2#1E21F21F2#1G21G2#1

SI2 C2#2D22D2#2E22F22F2#2G22G2#2

FI3 A21A2#1B21C31C3#1D31D3#1E31

SI3 A22A2#2B22C32C3#2D32D3#2E32

FI4 F31F3#1G31G3#1A31A3#1B31C41

SI4 F32F3#2G32G3#2A32A3#2B32C42

FI5 C4#1D41D4#1E41F41F4#1G41G4#1

SI5 C4#2D42D4#2E42F42F4#2G42G4#2

FI6 A41A4#1B41C51C5#1D51D5#1E51

SI6 A42A4#2B42C52C5#2D52D5#2E52

FI7 F51F5#1G51G5#1A51A5#1B51C61

SI7 F52F5#2G52G5#2A52A5#2B52C62

FI8 C6#1D61D6#1E61F61F6#1G61G6#1

SI8 C6#2D62D6#2E62F62F6#2G62G6#2

FI9 A61A6#1B61C71C7#1D71D7#1E71

SI9 A62A6#2B62C72C7#2D72D7#2E72

FI10 F71F7#1G71G7#1A71A7#1B71C81

SI10 F72F7#2G72G7#2A72A7#2B72C82

KI0 KI1

KC0 CONTROL —

KC1 SPLIT METRONOME

KC2 START/STOP RECORD

—4 —

PRINTED CIRCUIT BOARD

MAIN PCB M420-MAA1

Bottom view

Top view

— 5 —

SUB PCB M420-PSA1

Bottom view

Top view

CONSOLE PCB M420-PSA3

LED PCB M420-PSA4

POWER SUPPLY PCB M420-ACA1 JACK PCB M420-PSA2

— 6 —

DISASSEMBLY

■ To remove the piano from the stand

1. Remove the pedal plug from the pedal connector

on the bottom of the piano, and then remove the

pedal cord from the clip.

2. Remove two butterfly bolts.

Slide the piano toward the rear side, and then

remove it from the brackets.

Bracket

Butterfly boltAscrew

Frontside

Rear side

B screws

Cscrews

Pedal plug

Clip

■ To remove the pedal from the stand

1. Remove the two B screws and six C screws. 2. Remove four screws.

— 7 —

■ To remove the top board

1. Remove eight screws. 2. Slide the top board toward the front side. Next,

lift the top board and remove it from the piano.

■ To remove the keyboard cover

1. Close the keyboard cover.

2. Remove one screw and the bracket. 3. Lift the gear part upward(1), and then slide the

keyboard cover toward the rear side (2) to

remove it.

— 8 —

■ To remove the keyboard

1. Remove the twoA screws on the front side and the panel.

2. Remove the three C screws on the back side. Next, remove the eight B screws on the front side and remove

the bracket.

Front side

Back side

A screw B screws C screws

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