Casio WK-1500 Manuale utente

GM SOUND KEYBOARD

WK-1500

PITCH

BEND



— 2 —

CONTENTS

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

Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

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

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

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

Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

SPECIFICATIONS

GENERAL

Number of keys: 76

Polyphonic: 32-note

Digital effects: 10

REVERB 1, REVERB 2, REVERB 3, CHORUS, TREMOLO, PHASE

SHIFTER, ORGAN SPEAKER, ENHANCER, FLANGER, LOUDNESS

Pads: 180 (six pads ×30 sets)

Phrases (22 sets), drums/percussion (8 sets)

Melody tone matches chord

Demo tunes: 3, sequential repeat playback

Auto-accompaniment

Rhythm patterns: 100

Tempo: Adjustable (216 levels, q= 40 to 255)

Chords: 3 types (CASIO Chords, Fingered, Full-Range Chords)

Pads: Rhythm, bass, Chord 1, Chord 2, Chord 3 (adjustable on/off, tone, volume,

pan, effect send, fine tune, coarse tune, expression settings)

Magical presets: 50 types (Break beat, Melodycomp, Shadow Drum, Free Session)

Registration memory: 10

Tone changes, tempo setting, auto-accompaniment volume setting, mode,

layer on/off, Mixer settings, effect type, split on/off, rhythm type, auto-

accompaniment rhythm assignment, pad type, chord fingering method,

touch response setting, MIDI settings (including assignable jack settings),

Magical Preset type

Mixer

Number of channels: 16

Parameters: TONE, VOLUME, PAN, EFFECT SEND, FINE TUNE, COARSE TUNE,

EXPRESSION, MUTE

MIDI monitor: 16 LED monitor

Song memory

Number of songs: 2

Tracks: 6 (individual adjustment of on/off, tone, volume, pan, effect send, fine tune,

coarse tune, expression)

Type: Real-time

Capacity: Approximately 5,200 notes

Other functions

Transpose: 25 levels (1 octave lower C to 1 octave upper C)

Tuning: Adjustable: A4 = 440 Hz ±50 cents

Pitch Bender: Adjustable range: ±12 semitones

Tone Expander: Individual adjustment of volume, tuning, pan, effect send for each layer and

split tone

— 3 —

MIDI: 16-timbre multi-timbre receive (General MIDI Level 1)

Built-in speakers: 12 cm diameter ×2 (output: 5 W + 5 W)

Input/Output Jacks

Power supply: 12 V DC

Headphones: Stereo standard jack

Output jacks: Output impedance: 100 Ω

Output voltage 2.5 V (RMS) MAX

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

MIDI terminals: IN, OUT

Auto power off: Approximately 6 minutes after the last operation

Power source: 2-way AC or DC source

AC: AC adaptor

DC: 6D size dry batteries

Power consumption: 18 W

Dimensions (HWD): 116.1 ×30.2 ×11.0 mm (45-3/4 ×11-7/8 ×4-5/16 inches)

Weight: 6.8 kg (15.0 lbs) excluding batteries

ELECTRICAL

Current drain with 9 V DC:

No sound output 480 mA ±20%

Maximum volume

with 10 polyphonic notes in tone No. 081 1720 mA ±20%

Volume; maximum

Phone output level (Vrms with 8 load each channel): Left channel 175 mV ±20%

with key C2 pressed in tone No. 042

Line output level (Vrms with 47 k load each channel): Left channel 1420 mV ±20%

with key C2 pressed in tone No. 042

Minimum operating voltage: 12.0 V

— 4 —

KC0 ~

KC7

SI0 ~ SI7

FI0 ~ FI7

Key Controller

LSI107

HG52E35P

Working Storage RAM

(64K-bit)

LSI105

SRM2264LM90-B



KO1 ~ KO3

LED driver

IC371

BA612

LS0 ~ 

LS7

Buttons

KI1 ~ KI5 Power Switch

EA0 ~ EA14

ED0 ~ ED7

DSP

LSI102

HG51B115FD

RA0 ~ RA19

RD0 ~ RD15

Sound Source ROM

(16M-bit)

LSI101

TC5316200CF-C112



WCK1 SLOP BCK

D/A Converter

LSI104

UPD6376GS

Filter

IC101

Main

Volume

Power Amplifier

IC402

LA4598

CPU

LSI14

HD6433294A19F

Keyboard

A0 ~ A14

POWER

Power Supply Circuit

IC401, Q401 ~ Q405

VCC AVDD VDD

LVDD DVDD

Effect RAM

(256K-bit)

LSI103

LC33832M-70



D0~D7

Speakers

Output

A0 ~

A14

A0 ~ A3

A0 ~ A2

7-seg. LED

LEDs

LED driver

Q104 ~ Q111

KO Signal 

Generator IC102

TC74HC174AF

La ~ Lg, Lp

MIDI

OUT

Reset IC

IC5

RH5VL36AA

P40

P41 KO0 ~

KO5

Filter

IC101

RESET

BLOCK DIAGRAM

— 5 —

CIRCUIT DESCRIPTION

KEY MATRIX

KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7

FI0 E1 (1) F1 (1) F#1 (1) G1 (1) G#1 (1) A1 (1) A#1 (1)

SI0 E1 (2) F1 (2) F#1 (2) G1 (2) G#1 (2) A1 (2) A#1 (2)

FI1 B1 (1) C2 (1) C#2 (1) D2 (1) D#2 (1) E2 (1) F2 (1) F#2 (1)

SI1 B1 (2) C2 (2) C#2 (2) D2 (2) D#2 (2) E2 (2) F2 (2) F#2 (2)

FI2 G2 (1) G#2 (1) A2 (1) A#2 (1) B2 (1) C3 (1) C#3 (1) D3 (1)

SI2 G2 (2) G#2 (2) A2 (2) A#2 (2) B2 (2) C3 (2) C#3 (2) D3 (2)

FI3 D#3 (1) E3 (1) F3 (1) F#3 (1) G3 (1) G#3 (1) A3 (1) A#3 (1)

SI3 D#3 (2) E3 (2) F3 (2) F#3 (2) G3 (2) G#3 (2) A3 (2) A#3 (2)

FI4 B3 (1) C4 (1) C#4 (1) D4 (1) D#4 (1) E4 (1) F4 (1) F#4 (1)

SI4 B3 (2) C4 (2) C#4 (2) D4 (2) D#4 (2) E4 (2) F4 (2) F#4 (2)

FI5 G4 (1) G#4 (1) A4 (1) A#4 (1) B4 (1) C5 (1) C#5 (1) D5 (1)

SI5 G4 (2) G#4 (2) A4 (2) A#4 (2) B4 (2) C5 (2) C#5 (2) D5 (2)

FI6 D#5 (1) E5 (1) F5 (1) F#5 (1) G5 (1) G#5 (1) A5 (1) A#5 (1)

SI6 D#5 (2) E5 (2) F5 (2) F#5 (2) G5 (2) G#5 (2) A5 (2) A#5 (2)

FI7 B5 (1) C6 (1) C#6 (1) D6 (1) D#6 (1) E6 (1) F6 (1) F#6 (1)

SI7 B5 (2) C6 (2) C#6 (2) D6 (2) D#6 (2) E6 (2) F6 (2) F#6 (2)

FI8 G6 (1) G#6 (1) A6 (1) A#6 (1) B6 (1) C7 (1) C#7 (1) D7 (1)

SI8 G6 (2) G#6 (2) A6 (2) A#6 (2) B6 (2) C7 (2) C#7 (2) D7 (2)

FI9 D#7 (1) E7 (1) F7 (1) F#7 (1) G7 (1)

SI9 D#7 (2) E7 (2) F7 (2) F#7 (2) G7 (2)

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

Key

Second contact (2) First contact (1) FI

— 6 —

Name Voltage For operation of

VDD +5.2 V CPU, Reset IC, Working storage RAM, KO signal generator

DVDD +5.3 V DSP, Key touch LSI, Sound source ROM, Effect RAM

AVDD +5.1 V DAC, Filter

LVDD +5.2 V LED Driver

VCC +12 V Pilot lamp

VC +12 V Power amplifier

POWER SUPPLY CIRCUIT

The power supply circuit generates six voltages as shown in the following table. VDD voltage is always

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

NOMENCLATURE OF KEYS

F#1

G#1A#1 C#2 D#2 F#2G#2A#2 C#3 D#3 F#3G#3A#3 C#4 D#4 F#4G#4A#4 C#5 D#5 F#5G#5A#5 C#6 D#6 F#6G#6A#6 C#7 D#7 F#7

E1 G1 A1 B1 C2 D2 E2 F2 G2 A2 B2 C3 D3 E3 F3 G3 A3 B3 C4 D4 E4 F4 G4 A4 B4 C5 D5 E5 F5 G5 A5 B5 C6 D6 E6 F6 G6 A6 B6 C7 D7 E7 F7 G7

KI1 KI2 KI3 KI4 KI5 KI6 KI7

KO0 SPLIT LAYER CH7/CHORD2 CH8/

CHORD3 CH9/BASS CH10/

RHYTHM

KO1 TRANSPOSE

/TUNE MAGICAL

PRESET MIDI RHYTHM TONE PAD

KO2 CH4/LOWER2 CH5/PAD CH6/

CHORD1 CH2/

UPPER2 CH3/

LOWER1

KO3 3 6 9 DEMO TOUCH

RESPONSE DIGITAL

EFFECT

KO4 258

CH1/

UPPER1 147

KO5 ACM

VOLUME SONG

MEMORY MODULATION MIXER 0 – +

KO6 SYNCH/

ENDING VAR./FILL-IN NORMAL/

FILL–IN INTRO F E D

KO7 MODE A B C START/

STOP TEMPO

DOWN TEMPO UP

KO8 CH11/TR1 CH12/TR2 CH13/TR3 CH14/TR4 CH15/TR5 CH16/TR6

KO9 BANK

SELECT A B C D E STORE

BUTTON MATRIX

— 7 —

CPU (LSI14: HD6433294A19F)

The 16-bit CPU contains a 32k-bit ROM, a 1k-bit RAM, seven 8-bit I/O ports, an A/D convertor and MIDIl

interfaces. The CPU accesses to the working storage RAM, the DSP and the key touch LSI. The CPU

interprets MIDI message using the working storage RAM. The CPU also controls buttons and LEDs.

The following table shows the pin functions of LSI14.

DIGITAL SIGNAL PROCESSOR (LSI11: HG51B155FD-1)

Upon receipt of note numbers and their velocities, the DSP reads sound and velocity data from the sound

source ROM in accordance with the selected tone; the DSP can read rhythm data simultaneously when a

rhythm pattern is selected. Then it provides 16-bit serial signal containing data of the melody, chord,

bass, and percussion to the DAC. When an effect selected, the DSP adds the effect to the sound data

using a 256k-bit RAM.

The following table shows the pin functions of LSI11.

Pin No. Terminal In/Out Function

1 P50/TXD Out MIDI signal output

2 P51/RXD In MIDI signal input

3 P52/SCK Out Reset signal output

4 -RESET In Reset signal input

5 -NMI In Power ON trigger signal input

6 VCC In +5 V source

7 -STBY In Standby signal input. Connected to +5 V.

8 VSS In Ground (0 V) source

9, 10 XTAL, EXTAL In 20 MHz clock input

11, 12 MD1, MD0 In Mode selection input

13 AVSS In Ground (0 V) source

14 P70 In Analog input terminal for the pitch bend wheel

15 ~ 21 P71 ~ P77 Out Input terminals from keys (KI1 ~ KI7)

22 AVCC In +5 V source

23 ~ 30 P60 ~ P67 Out LED drive signal output

31 VCC In +5 V source

32 ~ 48 A0 ~ A15 Out Address bus

40 VSS In Ground (0 V) source

49 ~ 56 D0 ~ D7 In/Out Data bus

57 P40 Out Clock for KO signal generator

58 P41 Out KO signal data

59 P42 Out APO signal output

60 P43 Out Read enable signal output

61 P44 In Write enable signal output

62 P45 — Not used

63 P46 Out 10 MHz clock output

64 P47 — Not used. Connected to +5 V source.

— 8 —

Pin No. Terminal In/Out Function

1 ~ 8 CD0 ~ CD7 In/Out Data bus

9, 10 CE1, TRSB — Not used

11 GND7 In Ground (0 V) source

12 CK16 Out Terminal for 24.576 MHz clock check point

13 VCC6 In +5 V source

14 CK0 In Clock input. Connected to terminal CK16.

15 TCKB — Not used

16 VCC1 In +5 V source

17 GND1 In Ground (0 V) source

18, 19 XT0, XT1 In/Out 24.576 MHz clock input/output

20 SGL In System control terminal. Single chip system: Open

21 CCSB In Chip select signal input

22 ~ 25 CA0 ~ CA3 In Address bus

26 CE0 In Not used. Connected to ground.

27 CWRB In Write enable signal

28 CRDB In Read enable signal

29 ~ 32 — — Not used

33 RESB In Reset signal input

34 TESB In Not used. Connected to +5 V.

35 ~ 39 — — Not used

40 ~ 49

52 ~ 57

50 VCC2 In +5 V source

51 GND2 In Ground (0 V) source

58 RA23 Out Not used

59 RA22 Out Chip select signal for the sound source ROM

60 RA21 Out Not used

61 ~ 73

75 ~ 82

74 GND5 In Ground (0 V) source

83 WOK2 Out Not used

84 VCC3 In +5 V source

85 GND3 In Ground (0 V) source

86 WOK1 Out Word clock for the DAC

87 SOLM Out Not used

88 SOLP Out Serial sound data output

89 BOK Out Bit clock output

90 ~ 92 — — Not used

93 VCC5 In +5 V source

94, 95

97 ~ 105

107, 109

110, 112

96 EWEB Out Write enable signal for the effect RAM

RD0 ~ RD15 Data bus for the sound source ROMIn

RA0 ~ RA20 Address bus for the sound source ROMOut

EA0 ~ EA14 Address bus for the effect RAMOut

— 9 —

DSP



LSI11



HG51B155FD-1

Effect RAM (256K-bit)

LSI13

LC33832M-70-TLM

Sound Source ROM

LSI12

MX23C2410MC-12CA51

CE A0 ~ A20 Q0 ~ Q15

RA0 ~

RA20 RD0 ~

RD15

RA22

D0 ~ D7

A0 ~ A3

SOLP

BOK

WOK1

EA0 ~

EA14

ED0 ~

ED7

CS WE

I/01 ~ I/08 A0 ~ A14

ECEB EOEB EWEB PG

X11

24.576 MHz

DAC

IC11

UPD6376GS

LOUT

ROUT

SOLP: Sound data

BOK: Bit clock

WOK1: Word clock

CLK

LRCK

CCSB

LSIB

RDAB

WRAB

RESET

CRDB

CWRB

RESB

KO signal

generator



LSI17



UPD65611GB

Block diagram of DSP and DAC circuit

Pin No. Terminal In/Out Function

106 EOEB Out Read enable signal output for the effect RAM

108 VCC7 In +5 V source

111 ECEB Out Chip select signal output for the effect RAM

113 ~ 117 ED11 ~ ED15 — Not used

118 VCC4 In +5 V source

119 GND4 In Ground (0 V) source

120 ~ 122 ED8 ~ ED10 — Not used

123 ~ 130 ED0 ~ ED7 In/Out Data bus for the effect RAM

131 GND6 In Ground (0 V) source

132 ~ 134 — — Not used. Connected to ground.

135, 136 — — Not used

— 10 —

CRDB

CWRB

CKI

CCSB

CD0

CD7

CA0 ~ CA2

First contact

Second contact

KC0

KC7

FI0

FI9

SI0

SI9

Key input signal

Key scan signal

Data bus

Address bus

Key Controller

LSI16

HG52E35P Keyboard

RDAB

WRAB

CLKAHGB

RESET RESB

LSI17



HG52E35P

Pin No. Terminal In/Out Function

1 SEL In Mode selection terminal. Connected to ground.

2 D.GND In Ground (0 V) source for the internal digit circuit

3 NC — Not used.

4 DVDD In +5 V source for the internal digital circuit

5 A.GND In Ground (0 V) source for the right channel

6 R.OUT Out Right channel sound waveform output

7, 8 A.VDD In +5 V source for the internal analog circuit

9 R.REF In Right channel reference voltage terminal

10 L.REF In Left channel reference voltage terminal

11 L.OUT Out Left channel sound waveform output

12 A.GND In Ground (0 V) source for the left channel

13 LRCK In Word clock input

14 LRSEL In Not used. Connected to ground.

15 SI In Sound data input

16 CLK In Bit clock input

DAC (IC11: UPD6376GS)

The DAC receives 16-bit serial data output from the DSP. The data contains digital sound data of the

melody, chord, bass, and percussion for the right and left channels. The DAC converts the data into

analog waveforms by each channel and output them separately.

The following table shows the pin functions of IC11.

KEY CONTROLLER (LSI16: HG52E35P)

The key controller generates key scan signals and provides them to the keyboard. By counting the time

between first-key input signal FI and second-key SI from the keyboard, the key controller detects key

velocity. The note number and its velocity data are read at regular intervals by the CPU.

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