Casio CTK-530 User Manual

CTK-530

(with price)

ELECTRONIC KEYBOARD

CONTENTS

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

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

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

Major waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

PCB View and Check Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Schematic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

SPECIFICATIONS

GENERAL

Number of keys: 61 Polyphonic: 24-note Preset tones: 64 Keyboard controls: Touch response: On/Off,

Key transpose: Range from F# to F by a semitone increment Auto-rhythms: 64, Tempo control: 40 to 255 Auto-accompaniment: Mode: CASIO Chord/Fingered/Full-Range Chord 1/Full-Range Chord 2

Controller: Fill-In, Synchro/Ending Digital volume controls: Main volume: 10 steps

Accompaniment volume: 100 steps Demo tunes: 3, A Night has 9000 Bars (arranged and programmed byThomas Hirsch)

Wanting This (Edward Alstrom)

Supersonic Remorse (Edward Alstrom) Tuning control: 440Hz ± 50 cents Built-in speakers: 12 cm dia. 2 W input rating: 2 pcs. MIDI: 16 multi-channel reception Terminals: Phone Jack [Output impedance: 50 Ω, Output voltage: 4.0 V(rms) MAX],

MIDI Jacks (IN, OUT), AC Adapter Jack (9 V) Auto power off: Approximately 6 minutes after the last operation Power source: 2-way AC or DC source

AC: AC adapter AD-5

DC: 6 D size dry batteries

Battery life: approx. 5 hours by manganese batteries R20P/SUM-1 Power consumption: 7.7 W Dimensions (HWD): 99 x 931 x 326 mm (3-7/8 x 36-5/8 x 12-13/16 inches) Weight: 4.4 kg (9.7 lbs) excluding batteries

ELECTRICAL

Current Drain with 9 V DC: No Sound Output 180 mA ± 20% Maximum Volume 825 mA ± 20%

with keys C3 to E4 pressed in Synth-Lead 1 tone Volume: maximum, Touch response: maximum

— 2 —

Headphone output level (Vrms with 8 Ω load each channel):

with key C3 pressed in Pan Flute tone 210 mV ± 20%

Output level (Vrms with 47 kΩ load each channel):

with key C2 pressed in Pan Flute tone 2000 mV ± 20%

Speaker output level (Vrms with 4 Ω load each channel):

with key A1 pressed in Pan Flute tone 2150 mV ± 20%

Minimum operating voltage: 6.3 V

BLOCK DIAGRAM

Sound Source ROM

(8M-bit)

LSI102

MX23C8100MC-

12CA19

Reset IC

IC104

RE5VA35AA

LED Latch

IC107

HD74HC373P

MA8

MA11

MD0 ~ MD15

MA0 ~ MA19

RESET

MIDI

OUT

LED Latch

IC105

HD74HC75P

MD0

MD7

LED driver

Q111 ~ Q118

LED driver

IC106

BA612

CPU

LSI101

UPD912GF-3BA

KI0 ~ KI2

NMI

La ~ Lg, Lp

LEDs /

7Seg. LED

FI0 ~ FI7 SI0 ~ SI7

KC0 ~ KC7

Buttons

Keyboard

FI10

VDD

Power Switch

LVDD

VCC

Q101 ~ Q105, Q110, Q119

AVDD

Power Supply Circuit

D104, D105, D109

DVDD

VDD

APO

LRCK, SO, BCK

D/A Converter

IC103

UPD6379GR

Output

Filter

Q108, Q109

Speakers

Power Amplifier

IC101

LA4598

— 3 —

CIRCUIT DESCRIPTION

KEY MATRIX

KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7

FI0 C2 (1) C#2 (1) D2 (1) D#2 (1) E2 (1) F2 (1) F#2 (1) G2 (1) SI0 C2 (2) C#2 (2) D2 (2) D#2 (2) E2 (2) F2 (2) F#2 (2) G2 (2)

FI1 G#2 (1) A2 (1) A#2 (1) B2 (1) C3 (1) C#3 (1) D3 (1) D#3 (1) SI1 G#2 (2) A2 (2) A#2 (2) B2 (2) C3 (2) C#3 (2) D3 (2) D#3 (2)

FI2 E3 (1) F3 (1) F#3 (1) G3 (1) G#3 (1) A3 (1) A#3 (1) B3 (1) SI2 E3 (2) F3 (2) F#3 (2) G3 (2) G#3 (2) A3 (2) A#3 (2) B3 (2)

FI3 C4 (1) C#4 (1) D4 (1) D#4 (1) E4 (1) F4 (1) F#4 (1) G4 (1) SI3 C4 (2) C#4 (2) D4 (2) D#4 (2) E4 (2) F4 (2) F#4 (2) G4 (2)

FI4 G#4 (1) A4 (1) A#4 (1) B4 (1) C5 (1) C#5 (1) D5 (1) D#5 (1) SI4 G#4 (2) A4 (2) A#4 (2) B4 (2) C5 (2) C#5 (2) D5 (2) D#5 (2) FI5 E5 (1) F5 (1) F#5 (1) G5 (1) G#5 (1) A5 (1) A#5 (1) B5 (1)

SI5 E5 (2) F5 (2) F#5 (2) G5 (2) G#5 (2) A5 (2) A#5 (2) B5 (2) FI6 C6 (1) C#6 (1) D6 (1) D#6 (1) E6 (1) F6 (1) F#6 (1) G6 (1)

SI6 C6 (2) C#6 (2) D6 (2) D#6 (2) E6 (2) F6 (2) F#6 (2) G6 (2) FI7 G#6 (1) A6 (1) A#6 (1) B6 (1) C7 (1)

SI7 G#6 (2) A6 (2) A#6 (2) B6 (2) C7 (2)

FI10 +-0

KI0 Demo 3 2 1

KI1

KI2

Transpose Tune/MIDI

Touch

Response

6 5 4 Rhythm

9 8 7 Tone

Accomp.

Volume Up

Tempo

Main Vol.

Down

Accomp.

Vol. Down

Tempo

Down

Mode

Intro/

Fill-In

Synchro/

Ending

Start/

Stop

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

Key

Second contact (2)

First contact (1)

— 4 —

NOMENCLATURE OF KEYS

C#2

C2 D2E2F2G2A2 B2 C3 D3

F#2D#2

C#3A#2G#2

F#3 G#3

D#3

F3 G3 A3 B3 C4 D4 E4 F4 G4 A4 B4 C5 D5 E5 F5 G5 A5 B5

A#3 C#4 D#4

F#4 G#4

A#4

C#5

D#5

F#5 G#5

A#5

C#6

G#6F#6D#6

A#6

B6A6G6F6E6D6

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. When the power switch is pressed, the CPU receives a low pulse of POWER signal.The CPU raises APO signal to +5 V to turn power on.

CPU

LSI101

VDD

SCKO

POWER

APO

From power switchNMI

Power Supply Circuit

VDD

RE5VA35AA

Battery set

Reset IC

IC104

RESET

UPD912GF-3BA

CPU (LSI101: UPD912GF-3BA)

The 16-bit CPU contains a 1k-byte RAM, three 8-bit I/O ports, two timers, a keycontroller 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 DAC.The CPU also controls MIDI input/output and LED driving.

Sound Source ROM

LSI102

From keyboard

FI0 ~ FI7 SI0 ~ SI7

X101

20 MHz

MX23C8100PC-12CA19

A0 ~ A18 D0 ~ D15

MSB0

MA1 ~ MA19

CPU

LSI101

UPD912GF-3BA

MD0 ~ MD15

SO: Sound data BOK: Bit clock LRCK: Word clock

BOK LRCK

SI CLK LRCK

UPD6379GR

DAC IC103

ROUT

LOUT

— 5 —

The following table shows the pin functions of LSI101.

Pin No. Terminal In/Out Function

1 TXD0 Out MIDI signal input 2 RXD0 In MIDI signal output

3 SCK0 Out APO (Auto Power Off) signal output

4 ~ 6 Not used. Connected to ground.

7 AVCC In Ground (0 V) source

8, 9 AN0, AN1 Not used. Connected to ground.

10 AGND In Ground (0 V) source 11 BCK Out Bit clock output

12 SO Out Serial sound data output 13 LRCK Out Word clock output 14 GND In Ground (0 V) source

15, 16 XLT0, XLT1 In/Out 20 MHz clock input/output

17 VCC In +5 V source

18, 19 MD0, MD1 In Mode selection terminal. Connected to ground.

20 RSTB In Reset signal input 21 NMI In Power ON signal input 22 INT Not used. Connected to ground.

23 ~ 30 31 ~ 38 KC0 ~ KC7 Out Key scan signal output 39 ~ 46 47 ~ 50 In Not used.

51 FI10 In Button input signal input 52 SI10 In Not used

53 ~ 55 KI0 ~ KI2 In Button input signal input

56 MWNB Out Not used.

57 ~ 76 MA1 ~ MA17 Out Address bus

77 MCSB0 Out Chip enable signal output for the sound source ROM

78, 79 Out Not used

80 VCC In +5 V source 81 GND In Ground (0 V) source 82 MRDB Out Read enable signal output for the sound source ROM

83 ~ 98 MD0 ~ MD15 In/Out Data bus

99 PLE Out Latch enable signal output for LED latches

100 P17 In APO cancellation signal input

FI0 ~ FI3 SI0 ~ SI3

FI4 ~ FI7 SI4 ~ SI7

In Key input signal

DAC (IC103: UPD6379GR)

The DAC receives 16-bit serial data output from the CPU. 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 and output them to each channel separately.

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