Casio CTK-520L User manual

ELECTRONIC KEYBOARD

CTK-520L

TONE RHYTHM SONG

POWER/MODE

FINGERED

CASIO CHORD

NORMAL

OFF

VOLUME SYNCHRO/

FILL-INSTART/

STOP TEMPO

¢

⁄

¢

⁄ TRANSPOSE/TUNE

TONE

RHYTHM

SONG

BANK

PART

SELECT

PIANO

PIANO 1

PIANO 2

HONKY-TONK

STUDIO PIANO

ELEC PIANO 1

ELEC PIANO 2

ELEC PIANO 3

ELEC PIANO 4

HARPSICHORD

CLAVELECTRO

ORGAN

ELEC ORGAN 1

ELEC ORGAN 2

ELEC ORGAN 3

ELEC ORGAN 4

CHURCH ORGAN

PIPE ORGAN

REED ORGAN

ACCORDION

BANDONEON

HARMONICA

GUITAR/BASS

GUT GUITAR

ACOUS GUITAR

JAZZ GUITAR

ELEC GUITAR

MUTE GUITAR

DIST GUITAR

WOOD BASS

ELEC BASS

SLAP BASS

BANJO

STRINGS/ENSEMBLE

VIOLIN

CELLO

HARP

STRINGS 1

STRINGS 2

STRINGS 3

SYNTH-STR 1

SYNTH-STR 2

CHOIR

VOICE

BRASS

TRUMPET

TUBA

BRASS SECTION

FRENCH HORN 1

FRENCH HORN 2

BRASS 1

BRASS 2

SYNTH-BRASS 1

SYNTH-BRASS 2

SYNTH-BRASS 3

REED/PIPE

SOPRANO SAX

ALTO SAX

TENOR SAX

OBOE

CLARINET

PICCOLO

FLUTE

RECORDER

FLUTE ENSEMBLE

WHISTLE

SYNTH-SOUND 1

SYNTH-LEAD 1

SYNTH-LEAD 2

SYNTH-LEAD 3

SYNTH-CALLIOPE

SYNTH-PAD 1

SYNTH-PAD 2

SYNTH-PAD 3

GLESS HARMONICA

COUNTRY FARM

SYNTH-BASS

SYNTH-SOUND 2

PEARL DROP

COSMIC SOUND

SOUNDTRACK

SPACE PAD

SYNTH-SFX

SE 1 (VEHICLE)

SE 2 (TELEPHONE)

SE 3 (SPACE)

SE 4 (INVADER)

SE 5 (FUNNY)

LAYER

STRINGS PIANO

STRINGS EP

CHOIR EP

CHOIR ORGAN

STRINGS GUITAR

STRINGS HARP

BRASS STRINGS

VIB PAD

12STR GUITAR

CHOIR STRINGS

SPLIT/PERCUSSION

BASS/PIANO

BASS/E.PIANO

BASS/VIB

BASS/G.GUITAR

BASS/D.GUITAR

STRINGS/PIANO

STRINGS/TRUMPET

VIBRAPHONE

MARIMBA

PERCUSSION

100 TONES

3-STEP LESSON

ONE KEY PLAY

STEP 1 STEP 2 STEP3 DEMO

POPS

POP FUSION

BALLAD

POP BALLAD

RAP POP

SOUL BALLAD

FUNKY POP

16BEAT

8BEAT 1

8BEAT 2

POPS

ROCK

ROCK WALTZ

SLOW ROCK

SOFT ROCK 1

SOFT ROCK 2

FOLKIE POP

60’s SOUL

ROCK

HEAVY METAL

50’s ROCK

CHICAGO BLUES

JAZZ/DANCE

BIG BAND

SLOW SWING

FOX TROT

JAZZ WALTZ

ACID JAZZ

LATIN FUSION

TRANCE

DISCO

RAP

FUNK

EUROPEAN/LATIN

POLKA

MARCH

SLOW WALTZ

WALTZ

TANGO

BOSSA NOVA

SAMBA

MAMBO

RHUMBA

CHA-CHA-CHA

VARIOUS

MERENGUE

REGGAE

SKA

TEX-MEX

FOLKLORE

COUNTRY

SLOW GOSPEL

ADANI

BAROQUE

ENKA

TWINKLE TWINKLE

LITTLE STAR

ACH DU LIEBER AUGUSTIN

AMAZING GRACE

ODE TO JOY

LONDON BRIDGE

LONDONDERRY AIR

GREENSLEEVES

AULD LANG SYNE

WHEN YOU WISH

UPON A STAR

OVER THE RAINBOW

O CHRISTMAS TREE

YANKEE DOODLE

SANTA LUCIA

WHEN THE SAINTS

GO MARCHING IN

ALOHA OE

JOY TO THE WORLD

JINGL BELLS

SPRING FROM

"THE FOUR SEASONS"

IMAGINE

LITTLE BROWN JUG

MARCH FROM

"THE NUTCRACKER"

THE ENTERTAINER

STAND BY ME

YOU CAN’T HURRY LOVE

SERENADE

"EINE KLEINE NACHTMUSIK"

I JUST CALLED TO

SAY I LOVE YOU

FROM THE NEW WORLD

CANON(PACHELBEL)

SILENT NIGHT

THE ENTERTAINER

THE GIRL FROM IPANEMA

LOVE STORY

ETUDE op.10, no.3

"CHANSON DE L’ ADIEU"

MISTY

MINUET(J.S.BACH)

CLAIR DE LUNE

MOON RIVER

FUR ELISE

INVENTION no.1

TURKISH MARCH

(RONDO ALLA TURCA)

40 SONG BANK50 RHYTHMS

CONTENTS

Page

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

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

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

Major Waveforms ............................................................................................................................. 6

Printed Circuit Boards ...................................................................................................................... 7

Schematic Diagrams ........................................................................................................................ 8

Exploded View................................................................................................................................ 14

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

— 1 —

SPECIFICATIONS

GENERAL

Number of keys: 61

Polyphonic: 12-note

Preset tones: 100

Transpose: F# ~ C ~ F: half-note

Auto-rhythms: 50, Tempo: Adjustable, 216 steps (40 ~ 255), initial value: 120

Accompaniment: CASIO Chord, Fingered

Song bank: 40-tune

Digital volume control: 10 steps (0 ~ 9), initial value: 7

Tuning control: 440 Hz ±50 cents

Built-in speakers: 10 cm dia. 2 W input rating: 2 pcs

Terminals: Headphone Jack (Output impedance: 50 ohm, Output voltage: 4.6 V (rms) MAX

AC Adapter Jack (9 V) , Stereo standard Jack [Output impedance: 50 Ω, Output

voltage: 2 V(rms) MAX]

Auto power off: Approximately 6 minutes after the last operation

Power source: 2-way AC or DC source

AC: AC adapter

DC: 6 AA size

Power consumption: 7.7 W

Dimensions (HWD): 89 ×924 ×325 mm (3-1/2 ×36-7/16 ×12-13/16 inches)

Weight: 4.35 kg (9.6 lbs) excluding batteries

ELECTRICAL

Current drain with 9 V DC:

No sound output 130 mA ±20%

Maximum volume 810 mA ±20%

with white keys C1 to G2 pressed in Synth-Lead 1

Volume: Maximum

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

with key D3 pressed in Synth-Lead 1 95 mV ±20%

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

with key D3 pressed in Synth-Lead 1 1050 mV ±20%

Minimum operating voltage: 6.3 V

— 2 —

Buttons

Illuminant

Keyboard

7 seg. LED

LED Latch IC2, IC3

Q5 ~Q8

Q1 ~Q4

X1, Q11 Reset IC

IC1

Q307

Power Supply Circuit

Q301 ~Q304

D334, D335

Amp.

IC301

LA4598

Filter (L)

Q306

Filter (R)

Q305

Phone/Output

DC+9V IN APO Cancellation

Signal

APO

MA0

MA16 MD0 ~MD7

Sound Source ROM

LSI2

MX23C1010MC-12CA45

KO8 ~KO11

LY0 ~

LY7

KO0 ~KO7

LX0 ~

LX7

KI0 ~KI7

CPU

LSI1

MSM 6755B-07

LED Driver

BLOCK DIAGRAM

— 5 —

Amp.

IC301 Filter Block

Q305/Q306 CPU

LSI1

FILTER BLOCK

Since the sound signal from the CPU is a stepped waveform, the filter block is added to smooth the waveform.

POWER AMPLIFIER (IC301: LA4598)

The power amplifier is a two-channel amplifier with standby switch.

The following table shows the pin function of IC301.

Pin No. Terminal In/Out Function

1 Power GND In Ground (0V) source

2 Ch1 B.S. — Terminal for a bootstrap capacitor

3 Ch1 OUT Out Channel 1 output

4 VCC In +9V source

5 Ch1 N.F. In Negative feedback input

6 Ch1 IN In Channel 1 input

7 D.C. — Terminal for a decoupling capacitor

8 Pre GND In Ground (0V) source

9 Stand by In Power control signal input. 0 V: Off, +9 V: On

10 Ch2 IN In Channel 2 input

11 Ch2 N.F. In Negative feedback input

12 Ch2 OUT Out Channel 2 output

13 Ch2 B.S. — Terminal for a bootstrap capacitor

14 NC — Not used

LED DRIVING

LVDD

CPU



LSI1



MSM6755B-07

LX0 ~ LX7

LY0 ~ LY7 Q1 ~ Q4

Q5 ~ Q8

Q2 ~ Q4

La ~ Lg

(Common)

(Segment) MWEB

LED

Latch

IC3

7-segment LED Keyboard LEDs

LED

Latch

IC2

MD0 ~ MD3

MD4 ~ MD7

MA0

— 3 —

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 01234

Start/

Stop Up Volume

Down

KO9 5 6 7 8 9 Down Volume

Down Synchro/

Fill-In

K10 Tone Rhythm Song

Bank Part

Select One Key One Key Demo

K11 Step-1 Step-2 Step-3 Fingered Casio

Chord Normal Off

LED MATRIX

LX0 LX1 LX2 LX3 LX4 LX5 LX6 LX7

LY0 D4 D3 C3 C2 G#2 F#2 D#2 C#2

LY1 C4 E3 B2 D2 A#2 C#3 D#3 F#3

LY2 B3 F3 A2 E2 D#4 C#4 A#3 G#3

LY3 A3 G3 G2 F2 F#4 G#4 A#4 C#5

LY4 E4 E5 F5 F6 G6

LY5 F4 D5 G5 E6 A6 G#5 F#5 D#5

LY6 G4 C5 A5 D6 B6 A#5 C#6 D#6

LY7 A4 B4 B5 C6 C7 A#6 G#6 F#6

NOMENCLATURE OF KEYS

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

F3 G3 A3 B3 C4 D4 E4 F4 G4 A4 B4 C5 D5 E5 F5 G5 A5 B5 C6

D#3

C2 D2 E2 F2 G2 A2 B2 C3 D3 E3 B6A6G6F6E6D6 C7

C#3A#2G#2

F#2D#2

C#2 A#6

G#6F#6D#6

C#6

— 4 —

Pin No. Terminal In/Out Function

1 MA14 Out Address bus

2 MWEB Out Clock for LED latches

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. Connected to ground.

35 RSTB In Reset signal input

36 P24/RXD — Not used. Connected to +5 V.

37 P25/TXD — Not used.

38 NMI In Power ON signal input

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 and ADC

47 DAOL Out Left channel sound waveform output

48 REFL Out Terminal for the internal DAC and ADC

49 AGdac In Ground source for the internal DAC

50 AGadc In Ground source for the internal ADC

51 ANI — Not used. Connected to ground.

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 APO cancellation signal

58 ~ 65 KI0/P30 ~ KI7/P37 In Terminals for key/button input signal

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

74 ~ 77 KO8/P20 ~ KO11/P23 Out Terminals for button input signal

78 NC9 — Not used.

79 LVCC In +5 V source

80 ~ 95 LX0 ~ LX7, LY0 ~ LY7 Out LED drive signal

96 LGND In Ground source

97, 98 MA18, MA17 — Not used.

99, 100 MA16, MA15 Out Address bus

CPU (LSI1: MSM6755B-07)

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 input, button input and LED driving. The following table shows the pin functions of LSI1.

— 5 —

Amp.

IC301 Filter Block

Q305/Q306 CPU

LSI1

FILTER BLOCK

Since the sound signal from the CPU is a stepped waveform, the filter block is added to smooth the waveform.

POWER AMPLIFIER (IC301: LA4598)

The power amplifier is a two-channel amplifier with standby switch.

The following table shows the pin function of IC301.

Pin No. Terminal In/Out Function

1 Power GND In Ground (0V) source

2 Ch1 B.S. — Terminal for a bootstrap capacitor

3 Ch1 OUT Out Channel 1 output

4 VCC In +9V source

5 Ch1 N.F. In Negative feedback input

6 Ch1 IN In Channel 1 input

7 D.C. — Terminal for a decoupling capacitor

8 Pre GND In Ground (0V) source

9 Stand by In Power control signal input. 0 V: Off, +9 V: On

10 Ch2 IN In Channel 2 input

11 Ch2 N.F. In Negative feedback input

12 Ch2 OUT Out Channel 2 output

13 Ch2 B.S. — Terminal for a bootstrap capacitor

14 NC — Not used

LED DRIVING

LVDD

CPU



LSI1



MSM6755B-07

LX0 ~ LX7

LY0 ~ LY7 Q1 ~ Q4

Q5 ~ Q8

Q2 ~ Q4

La ~ Lg

(Common)

(Segment) MWEB

LED

Latch

IC3

7-segment LED Keyboard LEDs

LED

Latch

IC2

MD0 ~ MD3

MD4 ~ MD7

MA0

— 6 —

1APO signal

MSM6755B-07 pin 39

2Reset signal

RH5VL40AA pin 1

4Sound signal (R-ch)

JH connector pin 3

5Sound signal (L-ch)

JH connector pin 1

6LED drive signal LX0

MSM6755B-07 pin 88

3Clock

MSM6755B-07 pin 32

7LED drive signal LY0

MSM6755B-07 pin 80

Tone: Whistle (59)

Key : A4 Key: D4

MAJOR WAVEFORMS

— 7 —

PRINTED CIRCUIT BOARDS

Sub PCB KDM446-MA2M

Top view

Main PCB JCM446-MA1M

Bottom view Top view

245

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