Casio Celviano AP-25 Manual de usuario

AP-25/28

ELECTRONIC KEYBOARD

AP-25/28

APR. 2001

— 1 —

CONTENTS

Safety Notice...................................................................................... 1

Specifications .................................................................................... 2

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

Replacement of the Keyboard.......................................................... 4

Circuit Description ............................................................................ 6

Exploded View ................................................................................... 7

Parts List ............................................................................................ 9

Schematic Diagrams ....................................................................... 13

SAFETY NOTICE

CAUTION!

Danger of explosion if battery is incorrectly replaced.

Replace only with the same of equivalent type recommended

by the appliance manufacturer.Discard used batteries

according to manufacturer's instructions.

— 2 —

SPECIFICATIONS

GENERAL

Models: AP-25/AP-25V/AP-28/AP-28V

Keyboard: 88 piano keys (with touch response)

Polyphony: 64 notes, maximum

Tones: 8

Digital Effects: Reverb (4 types), Chorus

Demo Tunes: • Number of Tunes: 8

• Playback: Repeat (all tunes, one tune)

Memory: • Operations: Real-time recording, playback

• Capacity: Approximately 2,500 notes (one song)

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

Pedals: AP-25/AP-25V: Damper, Soft/Sostenuto (Selectable)

AP-28/AP-28V: Damper, Soft, Sostenuto

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

Output Impedance: 470Ω

Output Voltage: 18V (RMS) MAX

• MIDI (OUT) (IN)

Speakers: ø 12cm ×2 (Output: 20 W + 20 W)

Power Supply: AP-25/AP-28: 120V

AP-25V/AP-28V: 220-240V

Power Consumption: AP-25/AP-28: 60W

AP-25V/AP-28V: 60W

Dimensions: • CELVIANO (without stand): 137.0 ×42.5 ×19.0 cm (53 15/16 ×16 3/4×7 1/2inch)

• CELVIANO: 139.0 ×47.0 ×81.0 cm (54 3/4×18 1/2×31 7/8inch)

Weight: • CELVIANO (without stand): approximately 34 kg (74.8 lbs)

• CELVIANO: approximately 44 kg (96.8 lbs) (AP-25/AP-25V)

approximately 44 kg (96.8 lbs) (AP-28/AP-28V)

• Design and specifications are subject to change without notice.

• AP-25 and AP-28 have hardwired power cords.

• AP-25V and AP-28V have detachable power cords.

— 3 —

BLOCK DIAGRAM

FI0 ~ 10

SI0 ~ 10

CPU

uPD703107AGJ103UEN

LSI 6

PEDAL

MIDI

IN OUT

ROM (4MB)

MR27V3202E-81MA

LSI2

Keyboard

Controller

TC190C020AF

LSI 1

EA0 ~ 15

MA0 ~ 20

MD0 ~ 15

ED4 ~ 19

Keyboard

KC0 ~ 7

M-IN M-OUT

ANI0 ~ 2

DSP

uPD914AGM-3ED

LSI 3

RAM (128KB)

CY62126BVLL-55ZI

LSI4

RAM (128KB)

CY62126BVLL-55ZI

LSI5

CA1 ~ 16

CA1 ~ 5

CA1 ~ 4

3VD0 ~ 15

Power Switch

Power

Transformer

T101

Voltage

Selector

AVCC

VDD

+15V

+5V

Power Supply

IC401: NJM78M05FA

IC402: NJM78M15FA

Reset IC

RN5VD2BAA

IC 13

D/A Converter

PCM69BU/2K

IC 2

SYCK

BCK

WCK

Mute

Power Amp.

LM4765T

IC403

Main

Volume

Filter

IC1, IC405, IC406

HEADPHONE

SPSP

— 4 —

REPLACEMENT OF THE KEYBOARD

1) Replacement of the white key / black key

2) Replacement of the hammer

3) Replacement of the contact rubber

4) Other precauions

When the the keyboard needs to be replaced, make sure to check the key touch before replacing it.

1) Replacement of the White key / Black key

1. Expand the rear end of the white key/black key by a pair of

tweesers and slide it forward horizontally.

2. Apply proper amount of grease to the inside of the Guide and

the front end of the key as well as the rear end of the key.

* Take extra care of the quantity of the grease, which can easily

change the key touch.

* It is recommended to refer to the quantity of the grease which

is applied to the neighboring keys.

3. After replacing the key, put the front end of the key back into the

Guide and slide it backward horizontally.

* Take extra care not to make any scratches in the inside of the

front end of the key and the Guide.

2) Replacement of the Hammer

1. If no jig is available when disassembling, use a driver and a big clip. Then,

lift the hammer up and remove it like a lever.

2. Apply the grease (G501) thinly to the top and bottom of the front end as

well as the fulcrum of the hammer.

* It is recommended to refer to the quantity of the grease which is applied

to the other hammers when disassembling.

Guide

White key

Grease

Clip

Driver

Grease

— 5 —

Jig (lumber)

10 mm ×10 mm

Guide

White key

Screw

Contact rubber

PCB

100 g

105 g

3) Replacement of the contact rubber. (A Jig is necessary)

Since the contact rubber is replaced with the keyboard (both

white keys and black keys) turned upside down, a jig is necessary

to prevent from various troubles caused by the fact that the keys

are pushed down.

Precautions when replacing the contact rubber

1. Make sure that the keys are NOT pushed down.

2. Make sure that the contact rubber is attached to the frame in the right

position.

3. When assembling, take extra care that the contact rubber can often

be slipped or twisted at the ends of the rubber itself and the PCB.

4. Make sure that the screw is fixed vertically to the PCB since the key

PCB is fixed at an angle (see the right figure).

5. The key touch may change if the above precauions are not followed.

4) Other precautions

Initial load inspection of the keyboard

1. Check if the keys go down with the load put on them (100g for the white key and 105g for the black key).

Maintenance of the keyboard unit

1. Never keep the keyboard unit upside down, since the contact rubber may

be stuck to the PCB.

— 6 —

CIRCUIT DESCRIPTION

KEY MATRIX

KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7

FI0 A0 1 A0 # 1 B0 1 C1 1 C1 # 1 D1 1 D1 # 1 E1 1

SI0 A0 2 A0 # 2 B0 2 C1 2 C1 # 2 D1 2 D1 # 2 E1 2

EI1 F1 1 F1 # 1 G1 1 G1 # 1 A1 1 A1 # 1 B1 1 C2 1

SI1 F1 2 F1 # 2 G1 2 G1 # 2 A1 2 A1 # 2 B1 2 C2 2

FI2 C2 # 1 D2 1 D2 # 1 E2 1 F2 1 F2 # 1 G2 1 G2 # 1

SI2 C2 # 2 D2 2 D2 # 2 E2 2 F2 2 F2 # 2 G2 2 G2 # 2

FI3 A2 1 A2 # 1 B2 1 C3 1 C3 # 1 D3 1 D3 # 1 E3 1

SI3 A2 2 A2 # 2 B2 2 C3 2 C3 # 2 D3 2 D3 # 2 E3 2

FI4 F3 1 F3 # 1 G3 1 G3 # 1 A3 1 A3 # 1 B3 1 C4 1

SI4 F3 2 F3 # 2 G3 2 G3 # 2 A3 2 A3 # 2 B3 2 C4 2

FI5 C4 # 1 D4 1 D4 # 1 E4 1 F4 1 F4 # 1 G4 1 G4 # 1

SI5 C4 # 2 D4 2 D4 # 2 E4 2 F4 2 F4 # 2 G4 2 G4 # 2

FI6 A4 1 A4 # 1 B4 1 C5 1 C5 # 1 D5 1 D5 # 1 E5 1

SI6 A4 2 A4 # 2 B4 2 C5 2 C5 # 2 D5 2 D5 # 2 E5 2

FI7 F5 1 F5 # 1 G5 1 G5 # 1 A5 1 A5 # 1 B5 1 C6 1

SI7 F5 2 F5 # 2 G5 2 G5 # 2 A5 2 A5 # 2 B5 2 C6 2

FI8 C6 # 1 D6 1 D6 # 1 E6 1 F6 1 F6 # 1 G6 1 G6 # 1

SI8 C6 # 2 D6 2 D6 # 2 E6 2 F6 2 F6 # 2 G6 2 G6 # 2

FI9 A6 1 A6 # 1 B6 1 C7 1 C7 # 1 D7 1 D7 # 1 E7 1

SI9 A6 2 A6 # 2 B6 2 C7 2 C7 # 2 D7 2 D7 # 2 E7 2

FI10 F7 1 F7 # 1 G7 1 G7 # 1 A7 1 A7 # 1 B7 1 C8 1

SI10 F7 2 F7 # 2 G7 2 G7 # 2 A7 2 A7 # 2 B7 2 C8 2

LSI

HG52E35P

Second contact First contact

— 7 —

EXPLODED VIEW

CABINET

24 11 17

13 12

18 19 2021

— 8 —

STAND

x14

32 33 35

29 30 31

Notes: This parts list does not include the cosmetic parts, which

parts are marked with item No. "R-X" in the exploded

view.

Contact our spare parts department if you need these

parts for refurbish.

1. Prices and specifications are subject to change with-

out prior notice.

2. As for spare parts order and supply, refer to the

"GUIDEBOOK for Spare parts Supply", published

seperately.

3. The numbers in item column correspond to the same

numbers in drawing.

PARTS LIST

AP-25/28

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