CASIO PX-700 Service Manual

PX-700

INDEX

SEP. 2005

PX-700

ELECTRONIC KEYBOARD

Ver. 9: Jan. 2010

CONTENTS

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

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

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

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

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

Diagnostic Program ------------------------------------------------------------------------------------ 14

Schematic Diagrams ----------------------------------------------------------------------------------- 16

Exploded View ------------------------------------------------------------------------------------------- 20

Parts List--------------------------------------------------------------------------------------------------- 22

SPECIFICATIONS

GENERAL

Keyboard: 88 piano keys (with touch response)

Polyphony: 32 notes, maximum

Tones: 11; with layer, split

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

Metronome: • Time Signatures: 0, 2, 3, 4, 5, 6

• Tempo Range: 30 to 255

Music Library: • Number of Tunes: 60

• Tune Volume: Adjustable

• Demo: Sequential looping of all 60 preset tunes

• Part On/Off: Left hand, right hand

Song Memory: • Operations: Real-time recording, playback

• Capacity: Approximately 10,000 notes (2 tracks total)

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

Pedals: Damper, Soft, Sostenuto

Other Functions: • Touch: 3 types, off

• Transpose: 1 octave (F to C to F)

• Tuning: A4 = 440.0Hz ±50 cents (adjustable)

MIDI: 16 multi-timbre receive

Input/Output: • Headphones: Stereo standard jacks

Output Impedance: 170.
Output Voltage: 5.5V (RMS) MAX

• Power: 12V DC

• MIDI (OUT) (IN)

• Pedal connector

Speakers: 12cm  2 (Output: 8.0W + 8.0W)

Power Supply: AC Adaptor: AD-12

Power Consumption: 12V

18W

Dimensions: Digital piano + stand: 136.9  30.0  78.9 cm (53

Weight: Digital piano + stand: Approximately 32.5 kg (71.6 lbs)

 2

15

/

 11 13/16  31 1/16 inch)

16

ELECTRICAL

Load condition

Current drain with 12 V DC:
Speaker: 6 . Real Load
Volume: maximum
Tone: Strings
Touch: MAX mode

Keys: A0 - D5, 32poly
Consumption Current 1450 mA ± 20 %
Consumption Current at idle 230 mA ± 20 %

Speaker output level (Vrms with 6 . load each channel):

Tone: TEST MODE (Sin wave MAX L and MAX R)

L ch: 3000 mV ± 20 %
R ch: 3000 mV ± 20 %

Phone output level (Vrms with 32 . load each channel):

Tone: TEST MODE (Sin wave MAX)

L ch: 300 mV ± 20 %
R ch: 300 mV ± 20 %

— 1 —

MAIN PCB (M404-MDA1)

Reset IC

IC5

R1151N001C-TR

RESET

BLOCK DIAGRAM

MA0 ~ MA20

MA0 ~ MA16, 25

MD0 ~ MD7

RAM (1Mbit)

IC4

CY62128DV30LL

RAM (1Mbit)

IC3

CY62128DV30LL

EA0 ~ EA15,EA18

ED12 ~ ED19

16.384MHz

SUB PCB
(M404-PSA1)

MPU

IC7

uPD914AGM-JED

DAC IC15

µPD63200GS-E1

LOUT ROUT

IC8, IC13

Filter

Buttons

MA0 ~ MA20

MD0 ~ MD15

MA0 ~ MA3

MD0 ~ MD15

ROM (64Mbit)

MR27V6402G19RTN03D

IC1

KEY CONTROLLER

IC14

TC190C020AF-001

SI0 ~ SI7

FI0 ~ FI7

Keyboard

KC0 ~ KC7

CONSOLE PCB
(M406-CNA3)

CONSOLE PCB

(M406-CNA4)

(5V)

VA5

VI5

Power Supply Circuit

IC202,Q206,Q207,

D206,D207

D201

VD5

VA12

(12V)

(5V)

(5V)

Filter

IC205

Power Amplifier

IC201

LA4636

CONSOLE PCB
(M406-CNA2)

— 2 —

Main
Volume

CONSOLE PCB
(M406-CNA1)

(L)

(R)

Speakers

Keyboard PCB
(MCPZ-KYA1/KYB2/KYA3)

CIRCUIT DESCRIPTION

KEY MATRIX

KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7

FI0 A01 A0#1 B01 C11 C1#1 D11 D1#1 E11

SI0 A02 A0#2 B02 C12 C1#2 D12 D1#2 E12

FI1 F11 F1#1 G11 G1#1 A11 A1#1 B11 C21

SI1 F12 F1#2 G12 G1#2 A12 A1#2 B12 C22

FI2 C2#1 D21 D2#1 E21 F21 F2#1 G21 G2#1

SI2 C2#2 D22 D2#2 E22 F22 F2#2 G22 G2#2

FI3 A21 A2#1 B21 C31 C3#1 D31 D3#1 E31

SI3 A22 A2#2 B22 C32 C3#2 D32 D3#2 E32

FI4 F31 F3#1 G31 G3#1 A31 A3#1 B31 C41

SI4 F32 F3#2 G32 G3#2 A32 A3#2 B32 C42

FI5 C4#1 D41 D4#1 E41 F41 F4#1 G41 G4#1

SI5 C4#2 D42 D4#2 E42 F42 F4#2 G42 G4#2

FI6 A41 A4#1 B41 C51 C5#1 D51 D5#1 E51

SI6 A42 A4#2 B42 C52 C5#2 D52 D5#2 E52

FI7 F51 F5#1 G51 G5#1 A51 A5#1 B51 C61

SI7 F52 F5#2 G52 G5#2 A52 A5#2 B52 C62

FI8 C6#1 D61 D6#1 E61 F61 F6#1 G61 G6#1

SI8 C6#2 D62 D6#2 E62 F62 F6#2 G62 G6#2

FI9 A61 A6#1 B61 C71 C7#1 D71 D7#1 E71

SI9 A62 A6#2 B62 C72 C7#2 D72 D7#2 E72

FI10 F71 F7#1 G71 G7#1 A71 A7#1 B71 C81

SI10 F72 F7#2 G72 G7#2 A72 A7#2 B72 C82

NOMENCLATURE OF KEYS

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

C1 D1 E1 F1 G1 A1 B1A0 B0

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

BUTTON MATRIX

KC0

KC1

KC2

KI0

FUNCTION

START/

STOP

PART/

TRACK

KI1

SONG

MEMORY

METRONOME

SPLIT

D#3

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

F#3G#3 A#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

KI2

GRAND

PIANO

— 3 —

C#7

C6

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

B7A7G7F7E7D7 C8

MAIN PCB M404-MDA1

PRINTED CIRCUIT BOARDS

SUB PCB M404-PSA1

Top view

Bottom view

— 4 —

CONSOLE PCB M406-CNA1

CONSOLE PCB M406-CNA2 CONSOLE PCB M406-CNA3

CONSOLE PCB M406-CNA4

— 5 —

DISASSEMBLY

1. Remove 14 screws and then the lower panel.

2. Remove the T-BRD-UNIT.

■ Removing the PCBs (M404-MDA1, M406-CNA4, M404-PSA1).

3. Remove 13 screws.

T-BRD-UNIT

3. Remove 4 screws.

— 6 —

5. Remove 11 screws.

6. Remove the PCB case.

7. Remove 3 connectors.

8. Remove 4 screws.

CN2

CN6

CN7

9. Remove the FPC and then the main PCB (M404-MDA1).

— 7 —