Casio CTK-511 User Manual

CTK-511

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INDEX

CTK-511

ELECTRONIC KEYBOARD

CONTENTS

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

Block Diagram.................................................................................................................................. 2

Circuit Description............................................................................................................................ 3

Adjustment ....................................................................................................................................... 7

Major Waveforms ............................................................................................................................. 8

Printed Circuit Boards ...................................................................................................................... 9

Schematic Diagrams ...................................................................................................................... 10

Exploded View ............................................................................................................................... 15

Parts List ........................................................................................................................................ 16

SPECIFICATIONS

GENERAL

Keyboard: 61 standard-size keys, 5 octaves Tones: 100 Polyphony: 12 notes maximum (6 for certain tones) Auto accompaniment

Rhythm patterns: 100 Tempo: Variable (236 steps, = 20 to 255) Chords: 2 fingering methods (CASIO CHORD, FINGERED) Rhythm controller: START/STOP, SYNCHRO/FILL-IN Accomp volume: 0 to 9 (10 steps)

Song bank

Tunes: 100 Controllers: PLAY/PAUSE, STOP, REW, FF, LEFT ON/OFF (ACCOMP), RIGHT ON/

OFF (MELODY)

Display

Name display: TONE, RHYTHM, SONG BANK name/number, keyboard settings name/value Tempo: Tempo value, metronome, synchro standby, beat indicator Chord: Chord name, Chord form Fingering: Fingering indicators, parts, pedal Song bank status: PLAY, PAUSE, REW, FF Staff: 5 octaves with sharp and flat indications

Keyboard: 5 octaves MIDI: 5 multi-timbre receive Other functions

Transpose: 12 steps (–6 semitones to +5 semitones)

Tuning: Variable (A4 = approximately 440 Hz ± 50 cents)

Volume: 0 to 9 (10 steps) Terminals

MIDI terminals: IN, OUT

Sustain terminal: Standard jack

Phones/Output terminal: Stereo standard jack

Output Impedance: 78 Ω Output Voltage: 4 V (RMS) MAX

Power supply terminal: 9 V DC Power supply Dual power supply system

Batteries: 6 D-size batteries

Battery life: Approximately 8 hours on manganese batteries

AC adaptor: AD-5

Auto power off: Turns power off approximately six minutes after last key operation. Enabled

under battery power only, can be disabled manually. Speaker output: 2.0 W + 2.0 W Power consumption: 9 V --- 7.7 W Dimensions (HWD): 961 × 381 × 139 mm (37-7/8 × 15-1/16 × 5-1/2 inches) Weight: Approximately 5.4 kg (11.91 lbs) (without batteries)

ELECTRICAL

Current drain with 9 V DC:

No sound output 250 mA ± 20% Maximum volume 830 mA ± 20%

with 12 keys C1 to B1 pressed in Synth-Lead 1 Volume: Maximum

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

with key G2 pressed in Synth-Lead 1 78 mV ± 20%

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

with key G1 pressed in Synth-Lead 1 1250 mV ± 20%

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

with key B1 pressed in Synth-Lead 1 1050 mV ± 20%

Minimum operating voltage: 6.0 V

— 1 —

— 2 —

CPU

MSM 6755B-17

LSI2

Keyboard

Buttons

LCD

LCD Driver

SED1278F2A

LSI3

Reset IC

RN5VD40A

IC1

Oscillator

X1, Q1

Power Supply Circuit

Q201 ~ Q203, Q207, Q208, D205

Power Amp.

TA8248K

IC201

Filter (L)

Q206

Filter (R)

Q205

Phone/Output

VC VCC DVDD

AVDD

APO

DC + 9V IN

DB4 ~ DB7

MIDI IN MIDI OUT

COM1 ~ COM16

SEG1 ~ SEG40

RS R/W E

KO8 ~ KO12

KI0 ~ KI6

KO0 ~ KO7

MD0 ~ MD7

MA0 ~ MA18

ROM(2M-bit)

LC372100PM-

G48

LSI1

Power Switch

BLOCK DIAGRAM

CIRCUIT DESCRIPTION

KEY MATRIX

KI0 KI1 KI2 KI3 KI4 KI5 KI6 KI7

KO0 C2 G#2 E3 C4 G#4 E5 C6 G#6

KO1 C#2 A2 F3 C#4 A4 F5 C#6 A6

KO2 D2 A#2 F#3 D4 A#4 F#5 D6 A#6

KO3 D#2 B2 G3 D#4 B4 G5 D#6 B6

KO4 E2 C3 G#3 E4 C5 G#5 E6 C7

KO5 F2 C#3 A3 F4 C#5 A5 F6

KO6 F#2 D3 A#3 F#4 D5 A#5 F#6

KO7 G2 D#3 B3 G4 D#5 B5 G6

KO8 —+0

KO9 321

KO10 6 5 4 Rhythm Tone

Tempo

Down

Start/

Stop

Transpose/

Tune/MIDI

KO11 9 8 7 Fingered Normal Off

KO12 FF Right Stop Left REW

Play/

Pause

Tempo

Up

Synchro/

Fill-In

Song Bank

CASIO

Chord

Volume

Down

Chord

Book

Volume

Accomp

Volume

NOMENCLATURE OF KEYS

C#2

C2 D2E2F2G2A2 B2 C3 D3

F#2D#2

C#3A#2G#2

F#3 G#3

D#3

E3

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

C6

Up

G#6F#6D#6

A#6

B6A6G6F6E6D6

C7

— 3 —

CPU (LSI2: MSM6755B-17)

The CPU reads sound data from the ROM in accordance with the pressed key and the selected tone; the CPU can read rhythm data simultaneously when a rhythm pattern is selected. Then it provides the left and the right channels’ waveforms separately, by converting the data into the waveforms with two built-in DACs. The CPU also controls key and button input. The following table shows the pin functions of LSI2.

Pin No. Terminal In/Out Function

1 MA14 Out Address bus

2, 3 NCO — Not used

4 ~ 19 MA0 ~ MA13 Out Address bus

13 MRDB Out Read enable signal 17 MCSB — Not used

20 ~ 27 MD0 ~ MD7 In/Out Data bus

28, 29 NC1, NC2 — Not used

30 DGND In Ground (0 V) source 31 DVCC In +5 V source

32, 33 XTLO, XTLI In/Out 20 MHz clock input/output

34 NC3 — Not used 35 RSTB In Reset signal input 36 P24/RXD In MIDI signal input 37 P25/TXD Out MIDI signal output 38 NMI In Power ON signal input. Connected to +5 V. 39 APO Out APO (Auto Power Off) signal output 40 NC4 — Not used 41 REFH Out Terminal for the internal DAC

42, 43 NC5, NC6 — Not used

44 DAOR Out Right channel sound waveform output 45 NC7 — Not used 46 AVdac In +5 V source for the internal DAC 47 DAOL Out Left channel sound waveform output 48 REFL Out Terminal for the internal DAC and ADC 49 AGdac In Ground source for internal DAC 50 AGadc In Ground source for internal ADC 51 ANI In APO cancellation signal 52 AVadc In +5 V source for the internal ADC 53 NC8 — Not used 54 MOD0 In Mode selection terminal. Connected to +5 V.

55, 56 MOD1, MOD2 In Mode selection terminal. Connected to ground.

57 P40 In Pedal signal input

58 ~ 64 KI0/P30 ~ KI7/P36 In Terminals for key/button input signal

65 KI7/P37 — Not used

66 ~ 73 KO0/P50 ~ KO7/P57 Out Terminals for key scan signal

— 4 —

Pin No. Terminal In/Out Function

74 ~ 77 DB4 ~ DB7 Out Data bus for the LCD driver

78 NC9 — Not used

79 LVCC In +5 V source 80 ~ 84 KO8 ~ KO12 Out Terminals for button scan signal 85 ~ 87 P65 ~ P67 — Not used

88 RS Out Control signal for the LCD driver

89 R/W Out Read/Write signal for the LCD driver

90 E Out Chip enable signal for the LCD driver 91 ~ 95 P73 ~ P77 — Not used

96 LGND In Ground source 97, 100 MA18, MA15 Out Address bus

LCD DRIVER (LSI3: SED1278F2A)

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 LSI3.

Pin No. Terminal In/Out Function

1 ~ 22,

63 ~ 80

23 VSS — GND (0 V) source

24, 25 OSC1, OSC2 In/Out

26 ~ 30 V1 ~ V5 In Those voltages are used for generating the stepped pulse of

31, 32 LP, XCLS — Not used

33 VDD In DVDD (+5 V) source

34, 35 FR, DO — Not used

36 RS In

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

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

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

SEG1 ~ SEG40 Out Segment signal output

Terminals for the built-in clock pulse generator. The external resistor connected determines the oscillation frequency.

LCD drive voltage input.

the LCD drive signals.

Data/command determination terminal.

High: data, Low: command

Chip enable signal.

Low: disenable

— 5 —