Casio WK-1200 User Manual

WK-1200

100 RHYTHMS

ENVELOPE

AMP ENVELOPE

PITCH ENVELOPE

000-048 DECAY

MAX

MIN

00 FLAT049-137 SUSTAIN 01-19 VIBRATO 20-49 OTHERS

TEMPO ACCOMP VOLUME

REVERB

SYNTH

HALL STAGE

ROOM SYNTH MIXER

MIXER

MEMORY

STEP

MEMORY

STEP

CHORD/1 2 3 4 5 6

POWER

MODE

VOLUME

FULL RANGE CHORD FINGERED CASIO CHORD NORMAL

ELECTRONIC KEYBOARD

MUSICAL INFORMATION SYSTEM

MEMORY TRACK/DRUM PAD

200TONES

TRANSPOSE/

TUNE/MIDI

RHYTHM TONE

FREE SESSION

GM FREE SESSION LAYER

LAYER

SPLIT TOUCH RESPONSE

SPLIT

TOUCH

RESPONSE

REST

ENTER

DEMO

TIE

WK-1200

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

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)

— 1 —

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)

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 Ω 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 Ω 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 kΩ 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.

— 2 —

BLOCK DIAGRAM

Reset IC

IC2

RN5VD40AA

Sound Source ROM

(16M-bit)

LSI3

MX23C1610MC-

12CA64

Effect RAM

(256K-bit)

LSI5

TC55257DFL-

70L(EL)

RESET

MA0 ~ MA19

MA0, MA1

EA0 ~ EA14

EIO0 ~ EIO7

Working Storage

RAM (256K-bit)

LSI4

TC55257DFL-70L(EL)

MA0

MA14

MD0 ~ MD15

MD0

MD7

DSP LSI2

HG51B277FB-1

MIDI

LRCK, SO BCK, SINK

INOUT

GT-913F

CPU LSI1

P10, P13 P14, P17

P23

NMI

PA0 ~ PA5

PB0 ~ PB3

LCD Driver

LSI501

SED1278F0A

FI0 ~ FI9 SI0 ~ SI9

KC0 ~ KC7

KI0 ~ KI2 PB0 ~ PB3

FI10

VDD

SEG1 ~ SEG40

LCD

COM1 ~ COM16

Keyboard

Power Switch

Buttons

Speakers

Output

LRCK SO BCK

D/A Converter

IC1

UPD6379GR

Filter

Q308 ~ Q311

Main Volume

Power Amplifier

IC301

LA4620

PB4

APO

Assingnable Jack

CVDDLVDD

VCC

Q301 ~ Q304, 306, 307

AVDD

Power Supply Circuit

D307, 310

VDD

— 3 —

CIRCUIT DESCRIPTION

KEY MATRIX

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

Key

Note: Each key has two contacts, the first conatct (1) and second contact (2).

Second contact (2)

First contact (1)

NOMENCLATURE OF KEYS

C#1 D#1 F#1 G#1 A#1

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

C4 D4 E4 F4 G4 A4 B4 C5 D5 E5 F5 G5 A5 B5 D6 E6 F6 G6 A6 B6C6 C7

— 4 —

BUTTON MATRIX

KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7

DRUM DRUM PITCH

FI10 PAD 3 PAD 1 BEND

CHORD 3 CHORD 1 H

DRUM DRUM PITCH G

KI0 PAD 4 PAD 2 BEND

CHORD 4 CHORD 2 G

DRUM

KI1 PAD 5 STEP

CHORD 5

DRUM

KI2 PAD 6 MEMORY

CHORD 6

PA0 PA1 PA2 PA3

FULL RANGE

PB0

PB1 FINGERED

PB2

PB3 NORMAL

CHORD RESPONSE

NORMAL/ FREE ACCOMP

FILL-IN SESSION VOLUME

CASIO SYNCHRO/

CHORD ENDING

VARIATION/

FILL-IN

INTRO

TEMPO

TEMPOG TRANSPOSE/

ENTER

START/

STOP

TOUCH

LAYER SYNTH

SPILIT MIXER

E 7 2 0 DEMO

F 451

REVERB

9 6 + TONE

8 3 — RHYTHM

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.

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

— 5 —

LCD BACKLIGHT

Q501

23 32

NT-07

10 1

HMBV26BG1W63N/AZ

DE0405-979SL180J2K

C502

CFL1

(Bottom View)

T501

2 3

R501

C501

Q502

4.7K

LHL08TB101K

2SD965R 2SD965R

C104M

L501

C516

CP14

C104FA

CVDD

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 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.

Battery set

VDD

Reset IC

IC2

RN5VD40AA

POWER

From power switch

RESET

NMI

CPU LSI1

GT-913F

VDD

PLE

SCKO

Reset signal

APO

VDD

DSP LSI2

HG51B277FB-1

To power supply circuit

— 6 —

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

61KCStuOtuptuoeslupgnizinorhcnysZHM1 7CCVAnIecruos)V5+(DDVC

80NAnI

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 83~137CK~0CKtuOlangisnacsyekroflanimreT 05~93

1501IFnIlangistupninottubroflanimreT 2532P/01IStuOrevirdDCLehtroflangiselbanepihC

55~352IK~0IKnIlangistupninottubroflanimreT

65BNWMtuOPSDehtroflangiselbaneetirW

67~7591AM~0AMtuOsubsserddA 770BSCMtuOMORecruosdnuosehtroftuptuolangiselbanepihC 871BSCMtuOdesutoN 972BSCMtuOPSDehtroftuptuolangiselbanepihC

,31P/DXT

41P/DXR

3IF~0IF 3IS~0IS

9IF~4IF 9IS~4IS

tuO/nIrevirdDCLehtrofsubataD

nIlangistupniyekroflanimreT

.lanimretnoitcetedrotpadaCA

V0semocebdnaseirettabybderewopsidraobyekehtnehwV5+

.detcennocsirotpadaCAnehwnoitcnufOPAehtlecnacot

— 7 —

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