Casio WK-1200 Manuel utilisateur

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

AMP ENVELOPE

000-048 DECAY

PITCH ENVELOPE

00 FLAT049-137 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

RHYTHM TONE

ENTER

200TONES

DEMO

TIE

REST

— 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 Ωload 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 Ωload 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 kΩload 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 Ω

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

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

CVDDLVDD 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

INOUT

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

0CK1CK2CK3CK4CK5CK6CK7CK

0IF)1(1C)1(1#C)1(1D)1(1#D)1(1E)1(1F)1(1#F)1(1G

0IS)2(1C)2(1#C)2(1D)2(1#D)2(1E)2(1F)2(1#F)2(1G

1IF)1(1#G)1(1A)1(1#A)1(1B)1(2C)1(2#C)1(2D)1(2#D

1IS)2(1#G)2(1A)2(1#A)2(1B)2(2C)2(2#C)2(2D)2(2#D

2IF)1(2E)1(2F)1(2#F)1(2G)1(2#G)1(2A)1(2#A)1(2B

2IS)2(2E)2(2F)2(2#F)2(2G)2(2#G)2(2A)2(2#A)2(2B

3IF)1(3C)1(3#C)1(3D)1(3#D)1(3E)1(3F)1(3#F)1(3G

3IS)2(3C)2(3#C)2(3D)2(3#D)2(3E)2(3F)2(3#F)2(3G

4IF)1(3#G)1(3A)1(3#A)1(3B)1(4C)1(4#C)1(4D)1(4#D

4IS)2(3#G)2(3A)2(3#A)2(3B)2(4C)2(4#C)2(4D)2(4#D

5IF)1(4E)1(4F)1(4#F)1(4G)1(4#G)1(4A)1(4#A)1(4B

5IS)2(4E)2(4F)2(4#F)2(4G)2(4#G)2(4A)2(4#A)2(4B

6IF)1(5C)1(5#C)1(5D)1(5#D)1(5E)1(5F)1(5#F)1(5G

6IS)2(5C)2(5#C)2(5D)2(5#D)2(5E)2(5F)2(5#F)2(5G

7IF)1(5#G)1(5A)1(5#A)1(5B)1(6C)1(6#C)1(6D)1(6#D

7IS)2(5#G)2(5A)2(5#A)2(5B)2(6C)2(6#C)2(6D)2(6#D

8IF)1(6E)1(6F)1(6#F)1(6G)1(6#G)1(6A)1(6#A)1(6B

8IS)2(6E)2(6F)2(6#F)2(6G)2(6#G)2(6A)2(6#A)2(6B

9IF)1(7C

9IS)2(7C

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 C#6 D#6 F#6 G#6 A#6

D2 E2 F2 G2 A2 B2C1 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 B6C6 C7

— 5 —

PA0 PA1 PA2 PA3

PB0 FULL RANGE INTRO TOUCH REVERB

CHORD RESPONSE

PB1 FINGERED NORMAL/ FREE ACCOMP

FILL-IN SESSION VOLUME

PB2 CASIO SYNCHRO/ LAYER SYNTH

CHORD ENDING

PB3 NORMAL VARIATION/ SPILIT MIXER

FILL-IN

KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7

DRUM DRUM PITCH H

FI10 PAD 3 PAD 1 BEND ENTER 9 6 + TONE

CHORD 3 CHORD 1 H

DRUM DRUM PITCH G START/

KI0 PAD 4 PAD 2 BEND STOP 8 3 — RHYTHM

CHORD 4 CHORD 2 G

DRUM TEMPO

KI1 PAD 5 STEP HE7 2 0 DEMO

CHORD 5

DRUM TEMPOG TRANSPOSE/

KI2 PAD 6 MEMORY GF451

CHORD 6 TUNE/MIDI

POWER SUPPLY CIRCUIT

The power supply circuit generates five voltages as shown in the following table. VDD and VC voltages

are always generated. The others are controlled by APO signal from the CPU.

BUTTON MATRIX

Name Voltage For operation of

VDD +5 V CPU, Reset IC, DSP, Sound source ROM, Working storage RAM, Effect RAM

AVDD +5 V DAC, Filter

LVDD +5.6 V LCD driver

VCC,VC +9 V Power amplifier, Pilot lamp

CVDD +5 V Power jack, Pedal jack, MIDI jacks, Source voltage for LCD backlight

— 6 —

RESET CIRCUIT

When batteries are set or an AC adapter is connected, the reset IC provides a low pulse to the CPU. The

CPU then initializes its internal circuit, and clears the working storage RAM.

When the power switch is pressed, the CPU receives a low pulse of POWER signal. The CPU sends APO

signal to the power supply circuit, also sends a reset signal to the DSP.

LCD BACKLIGHT

When voltage CVDD is supplied, transistors Q501 and 502 start oscillation.

From the oscillation voltage, transformer T501 generates about 600 V which is necessary for lighting the

backlight.

Reset IC

IC2

RN5VD40AA

DSP

LSI2

HG51B277FB-1

VDD

Reset signal

To power supply circuit

VDD Battery set

RESET

VDD

POWER

From power switch NMI

APO

PLE

CPU

LSI1

GT-913F

SCKO

10 1

C502

(Bottom View)

NT-07

T501

CFL1

L501

LHL08TB101K

CVDD

C104FA

C104M

2SD965R 2SD965R

C501

R501

4.7K

Q501

CP14

Q502

C516

23 32

HMBV26BG1W63N/AZ

DE0405-979SL180J2K

— 7 —

CPU (LSI1: GT-913F)

The 16-bit CPU contains a 1k-byte RAM, three 8-bit I/O ports, two timers, a key controller and serial interfaces.

The CPU detects key velocity by counting the time between first-key input signal FI and second-key SI from

the keyboard. The CPU reads sound data and velocity data from the sound source ROM in accordance with

the selected tone; the CPU can read rhythm data simultaneously when a rhythm pattern is selected. Then the

CPU provides 16-bit serial sound data to the DSP. The CPU also controls MIDI input/output and stores

sequencer data into the working storage RAM.

The following table shows the pin functions of LSI1.

.oNniPlanimreTtuO/nInoitcnuF

10DXTtuOtuptuolangisIDIM

20DXRnItupnilangisIDIM

30KCStuOtuptuolangis)ffOrewoPotuA(OPA

5,4

,31P/DXT

41P/DXR

tuO/nIrevirdDCLehtrofsubataD

61KCStuOtuptuoeslupgnizinorhcnysZHM1

7CCVAnIecruos)V5+(DDVC

80NAnI .lanimretnoitcetedrotpadaCA V0semocebdnaseirettabybderewopsidraobyekehtnehwV5+ .detcennocsirotpadaCAnehwnoitcnufOPAehtlecnacot

91NAnIrednebhctipmorftupnI

01DNGAnIecruos)V0(dnuorG

11KCBtuOtuptuokcolctiB

21OStuOtuptuoataddnuoslaireS

31KCRLtuOtuptuokcolcdroW

41DNGnIecruos)V0(dnuorG

61,511TLX,0TLXtuO/nItuptuo/tupnikcolczHM03

71CCVnIecruosV5+

91,811DOM,0DOMnIlanimretnoitcelesedoM

02BTSRnItupnilangisteseR

12IMNnItupnilangisNOrewoP

2201P/TNItuO/nIrevirdDCLehtrofsubataD

03~32

3IF~0IF

3IS~0IS

nIlangistupniyekroflanimreT

83~137CK~0CKtuOlangisnacsyekroflanimreT

05~93

9IF~4IF

9IS~4IS

nIlangistupniyekroflanimreT

1501IFnIlangistupninottubroflanimreT

2532P/01IStuOrevirdDCLehtroflangiselbanepihC

55~352IK~0IKnIlangistupninottubroflanimreT

65BNWMtuOPSDehtroflangiselbaneetirW

67~7591AM~0AMtuOsubsserddA

770BSCMtuOMORecruosdnuosehtroftuptuolangiselbanepihC

871BSCMtuOdesutoN

972BSCMtuOPSDehtroftuptuolangiselbanepihC

— 8 —

.oNniPlanimreTtuO/nI noitcnuF

08,3~13BP~0BPnIslanimrettupninottuB

44BPnItupnikcaJELBANGISSA

5OStuOCADehtroftuptuoataddnuoslaireS

6OKCWtuOCADehtroftuptuokcolcdroW

73DDVnIecruosV5+

8TSET—desutoN

9BSERnItupnilangisteseR

012SSVnIecruos)V0(dnuorG

21,11TUOX,NIXtuO/nItuptuo/tupnikcolczHM02

31IKCWnIUPCehtmorftupnikcolcdroW

41ISnIUPCehtmorftupniataddnuoslaireS

51IKCBnIUPCehtmorftupnikcolctiB

61CNISnItupnieslupgnizinorhcnyszHM1

712DDVnIecruosV5+

52~817OI~0OItuO/nIsubataD

62BECRtuOMARegarotsgnikrowehtroftuptuolangiselbanepihC

723SSVnIecruos)V0(dnuorG

821DAnIsubsserddA

92BEDnIMARegarotsgnikrowroflangiselbaneataD

03BEWnIlangiselbaneetirW

133DDVnIecruosV5+

232ECnI.evitcahgiH.tupnilangiselbanepihC

330DAnIsubsserddA

43B1ECnI.evitcawoL.tupnilangiselbanepihC

34,14~537OIE~0OIEtuO/nIMARtceffeehtrofsubataD

,84~64,44,24

16,95~15

41AE~0AEtuOMARtceffeehtrofsubsserddA

54BECEtuOMARtceffeehtroftuptuolangiselbanepihC

DIGITAL SIGNAL PROCESSOR (LSI2: HG51B227FB-1)

The DSP receives 16-bit serial sound data output from the CPU and adds the selected effect to the sound data

using the effect RAM. Then the DSP provides the sound data to the DAC. The DSP also controls button input/

output.

The following table shows the pin functions of LSI2.

.oNniPlanimreTtuO/nInoitcnuF

08CCVnIecruosV5+

18DNGnIecruos)V0(dnuorG

28BDRMtuOMORecruosdnuosehtroftuptuolangiselbanedaeR

89~3851DM~0DMtuO/nIsubataD

99ELPtuOPSDehtroftuptuolangisteseR

00171PtuO/nIrevirdDCLehtrofsubataD

— 9 —

Pin No. Terminal In/Out Function

49 EOEB Out Read enable signal output for the effect RAM

50 VSS3 In Ground (0 V) source

60 BWEB Out Write enable signal output for the effect RAM

62, 66, 70, 74, 78 VSS2 In Ground source

63, 67, 71, 75, 79 VDD2 In +5 V source

64, 65, 68, 69, PA0 ~ PA5 Out Button scan signal output

72, 73

76, 77 PA6/7 Out Not used

LCD DRIVER (LSI501 : SED1278F0A)

The LCD driver can drive a dot matrix LCD having 40 segment and 16 common lines. The LSI contains 240

graphic symbols in the built-in character generator ROM, and stores 80 characters in the built-in display data

RAM. In accordance with command from the CPU, the LSI is capable of displaying up to 16 characters

simultaneously. The following table shows the pin functions of LSI 501.

Pin No. Terminal In/Out Function

1 ~ 22, SEG1 ~ SEG40 Out Segment signal output

63 ~ 80

23 VSS — GND (0 V) source

24, 25 OSC1, OSC2 In/Out Terminals for the built-in clock pulse generator. The external

resistor connected determines the oscillation frequency.

26 ~ 30 V1 ~ V5 In LCD drive voltage input.

Those voltages are used forgenerating the stepped pulse of

the LCD drive signals.

31, 32 LP, XSCL — Not used

33 VDD In LVDD (+5 V) source

34, 35 FR, DO — Not used

36 RS In Data/command determination terminal.High: data, Low:

command

37 R/W In Read/write terminal. High: read, Low: write

38 E In Chip enable signal.

High: enable, the writing is done at fall edge.

Low: disenable

39 ~ 42 DB0 ~ DB3 — Not used. Connected to GND (0 V)

43 ~ 46 DB4 ~ DB7 In/Out Data bus

47 ~ 62 COM1 ~ COM16 Out Common signal/output

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