CASIO WK1200 - Service Manual Immediate Download

ELECTRONIC KEYBOARD

WK-1200

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

REVERB

GM

FREE

SESSION

LAYER

SPLIT

TOUCH

RESPONSE

MEMORY TRACK/DRUM PAD

HALL

STAGE

ROOM

SYNTH

MIXER

MEMORY

STEP

CHORD/1

2

3

4

5

6

REVERB

SYNTH

MIXER

MUSICAL INFORMATION SYSTEM

MEMORY

STEP

TEMPO

ACCOMP VOLUME

SYNCHRO/END

ING

INTRO

NORMAL/FIL

L-IN

VAR/FILL

-IN

AMP ENVELOPE

000-048 DECAY

PITCH ENVELOPE

00 FLAT

049-137 SUSTAIN

01-19 VIBRATO

20-49 OTHERS

MODE

POWER

VOLUME

100 RHYTHMS

FULL RANGE

MAX

ENVELOPE

MIN

CHORD

FINGERED

CASIO CHORD

NORMAL

TRANSPOSE/

FREE SESSION

LAYER

SPLIT

TOUCH

RESPONSE

TUNE/MIDI

CURSOR

RHYTHM

TONE

ENTER

200TONES

DEMO

TIE

REST

3

-- 1 --

SPECIFICATIONS

GENERAL

Keyboard:

73 standard-size keys, 6 octaves (with touch response on/off)

Drum pads:

6

Tones:

200 (128 General MIDI, 32 synthesized, 8 drum, 32 user); with layer and

split

Rhythm instrument tones:

51

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 /FILL-IN, VAR/FILL-IN, SYNCHRO/

ENDING

Accomp volume:

0 to 127 (128 steps)

Free session

Number of patterns

100 (auto-accompaniment in accordance with selected chord progres-

sion)

Memory function

Songs:

2

Recording tracks:

6 (2 through 6 are melody tracks)

Recording methods:

Real-time, step

Memory capacity:

Approximately 5,200 notes (total for two songs)

Edit function:

Equipped

Demo tunes:

2

Synthesizer function

Parameters:

PCM set, amp envelope set, attack rate, release rate, pitch envelope set,

pitch, level, touch sense, pan

Mixer function

Channels:

16

Parameters:

Program change number, volume, expression, pan, coarse tuning, fine

tuning, on/off/solo

MIDI:

16 multi-timbre receive, GM Level 1 standard

Other functions

Pitch bend range:

12 semitones upwards and downwards

Transpose:

25 steps (12 semitones to +12 semitones)

Tuning:

Variable (A4 = approximately 440 Hz

± 50 cents)

CONTENTS

Page

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

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

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

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

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

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

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

Exploded View ........................................................................................................................................ 21

Parts List ................................................................................................................................................. 23

-- 2 --

ELECTRICAL

Current drain with 12 V DC:

No sound output

430 mA

± 20 %

Maximum volume

1570 mA

± 20 %

with 24 keys from C4 to C6 pressed in Bassoon tone

Volume: maximum, Touch response: maximum

Reverb: Hall

Phone output level (Vrms with 8

load each channel):

with key A5 pressed in Bassoon tone

L-ch

165 mV

± 20 %

Volume: maximum

R-ch

150 mV

± 20 %

Reverb: Hall

Speaker output level (Vrms with 4

load each channel):

with key A5 pressed in Bassoon tone

L-ch

5500 mV

± 20 %

Volume: maximum

R-ch

5200 mV

± 20 %

Reverb: Hall

Output level (Vrms with 47 k

load each channel):

with key A5 pressed in Bassoon tone

L-ch

4260 mV

± 20%

R-ch

3950 mV

± 20%

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.

Terminals

MIDI terminals:

IN, OUT

Assignable terminal:

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

Headphone/Output terminal: Stereo standard jack

Output Impedance: 200

Output Voltage: 4.9 V (RMS) MAX

Power supply terminal:

12 V DC

Power supply

Dual power supply system

Batteries:

Six D-size batteries

Battery life:

Approximately 2 hours (UM-1/R20) 8 hours (AM-1/LR20)

AC adaptor:

AD-12

Auto power off:

Turns power off approximately six minutes after last key operation. En-

abled under battery power only, can be disabled manually.

Power consumption:

12 V --- 18 W

Speaker output:

5 W + 5 W

Dimensions (HWD):

116.2

× 42.1 × 14.7 cm (45-13/16 × 16-9/16 × 5-13/16 inches)

Weight:

Approximately 9.1 kg (20.1 lbs) (without batteries)

-- 3 --

BLOCK DIAGRAM

KC0 ~ KC7

FI0 ~ FI9

SI0 ~ SI9

KI0 ~ KI2

PB0 ~ PB3

P10, P13

P14, P17

Working Storage

RAM (256K-bit)

LSI4

TC55257DFL-70L(EL)

MIDI

EA0 ~

EA14

EIO0 ~

EIO7

Sound Source ROM

(16M-bit)

LSI3

MX23C1610MC-

12CA64

LRCK

SO

BCK

D/A Converter

IC1

UPD6379GR

Filter

Q308 ~ Q311

Main

Volume

Power Amplifier

IC301

LA4620

Keyboard

MA0 ~ MA19

Power Supply Circuit

Q301 ~ Q304, 306, 307

D307, 310

VCC

AVDD

VDD

CVDD

LVDD

VC

APO

Effect RAM

(256K-bit)

LSI5

TC55257DFL-

70L(EL)

MD0

~

MD7

Speakers

Output

MA0

~

MA14

MA0, MA1

LRCK, SO

BCK, SINK

LCD

LCD Driver

LSI501

SED1278F0A

SEG1 ~ SEG40

IN

OUT

Reset IC

IC2

RN5VD40AA

RESET

COM1 ~ COM16

DSP

LSI2

HG51B277FB-1

MD0 ~ MD15

CPU

LSI1

GT-913F

Buttons

Assingnable Jack

PB4

VDD

Power Switch

NMI

FI10

P23

PA0 ~ PA5

PB0 ~ PB3

-- 4 --

CIRCUIT DESCRIPTION

KEY MATRIX

Note: Each key has two contacts,

the first conatct (1) and second contact (2).

Key

Second contact (2)

First contact (1)

KC

SI

FI

0

C

K1

C

K2

C

K3

C

K4

C

K5

C

K6

C

K7

C

K

0

I

F

)

1

(

1

C)

1

(

1

#

C)

1

(

1

D)

1

(

1

#

D)

1

(

1

E)

1

(

1

F)

1

(

1

#

F)

1

(

1

G

0

I

S

)

2

(

1

C)

2

(

1

#

C)

2

(

1

D)

2

(

1

#

D)

2

(

1

E)

2

(

1

F)

2

(

1

#

F)

2

(

1

G

1

I

F

)

1

(

1

#

G)

1

(

1

A)

1

(

1

#

A)

1

(

1

B)

1

(

2

C)

1

(

2

#

C)

1

(

2

D)

1

(

2

#

D

1

I

S

)

2

(

1

#

G)

2

(

1

A)

2

(

1

#

A)

2

(

1

B)

2

(

2

C)

2

(

2

#

C)

2

(

2

D)

2

(

2

#

D

2

I

F

)

1

(

2

E)

1

(

2

F)

1

(

2

#

F)

1

(

2

G)

1

(

2

#

G)

1

(

2

A)

1

(

2

#

A)

1

(

2

B

2

I

S

)

2

(

2

E)

2

(

2

F)

2

(

2

#

F)

2

(

2

G)

2

(

2

#

G)

2

(

2

A)

2

(

2

#

A)

2

(

2

B

3

I

F

)

1

(

3

C)

1

(

3

#

C)

1

(

3

D)

1

(

3

#

D)

1

(

3

E)

1

(

3

F)

1

(

3

#

F)

1

(

3

G

3

I

S

)

2

(

3

C)

2

(

3

#

C)

2

(

3

D)

2

(

3

#

D)

2

(

3

E)

2

(

3

F)

2

(

3

#

F)

2

(

3

G

4

I

F

)

1

(

3

#

G)

1

(

3

A)

1

(

3

#

A)

1

(

3

B)

1

(

4

C)

1

(

4

#

C)

1

(

4

D)

1

(

4

#

D

4

I

S

)

2

(

3

#

G)

2

(

3

A)

2

(

3

#

A)

2

(

3

B)

2

(

4

C)

2

(

4

#

C)

2

(

4

D)

2

(

4

#

D

5

I

F

)

1

(

4

E)

1

(

4

F)

1

(

4

#

F)

1

(

4

G)

1

(

4

#

G)

1

(

4

A)

1

(

4

#

A)

1

(

4

B

5

I

S

)

2

(

4

E)

2

(

4

F)

2

(

4

#

F)

2

(

4

G)

2

(

4

#

G)

2

(

4

A)

2

(

4

#

A)

2

(

4

B

6

I

F

)

1

(

5

C)

1

(

5

#

C)

1

(

5

D)

1

(

5

#

D)

1

(

5

E)

1

(

5

F)

1

(

5

#

F)

1

(

5

G

6

I

S

)

2

(

5

C)

2

(

5

#

C)

2

(

5

D)

2

(

5

#

D)

2

(

5

E)

2

(

5

F)

2

(

5

#

F)

2

(

5

G

7

I

F

)

1

(

5

#

G)

1

(

5

A)

1

(

5

#

A)

1

(

5

B)

1

(

6

C)

1

(

6

#

C)

1

(

6

D)

1

(

6

#

D

7

I

S

)

2

(

5

#

G)

2

(

5

A)

2

(

5

#

A)

2

(

5

B)

2

(

6

C)

2

(

6

#

C)

2

(

6

D)

2

(

6

#

D

8

I

F

)

1

(

6

E)

1

(

6

F)

1

(

6

#

F)

1

(

6

G)

1

(

6

#

G)

1

(

6

A)

1

(

6

#

A)

1

(

6

B

8

I

S

)

2

(

6

E)

2

(

6

F)

2

(

6

#

F)

2

(

6

G)

2

(

6

#

G)

2

(

6

A)

2

(

6

#

A)

2

(

6

B

9

I

F

)

1

(

7

C

9

I

S

)

2

(

7

C

NOMENCLATURE OF KEYS

C2

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

C#6 D#6

F#6 G#6 A#6

D2

E2

F2

G2 A2

B2

C1 D1

E1

F1

G1 A1

B1

C3 D3

E3

F3

G3 A3

B3

C#1 D#1

F#1 G#1 A#1

C4 D4

E4

F4

G4 A4

B4

C5 D5

E5

F5

G5 A5

B5

D6

E6

F6

G6 A6

B6

C6

C7