Casio CTK-620L User Manual

CTK-620L

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100 RHYTHMS

RHYTHMS

TONE

137 TONES

REVERB

HALL

TOUCH

RESPONSE

STAGE

METRONOME

START/STOP

ROOM TOUCH

RESPONSE KEY LIGHT

BEAT

ACCOMP

KEY LIGHT

VOLUME

SYNCHRO/ENDINGINTROVOLUMEMODE

FULL RANGE CHORD FINGERED CASIO CHORD NOMAL

MAX

MIN

NORMAL/FILL-IN VARIATION/FILL-IN

POWER

TEMPO

ELECTRONIC KEYBOARD

MUSICAL INFORMATION SYSTEM

SONG BANK CONTROLLER

STOP PLAY/PAUSE REW FF

100 SONG BANK

SONG BANK

TRANSPOSE/

TUNE/MIDI

LAYER

SPLIT MEMORY

SPLIT

RHYTHM

STEP

MEMORY

STEP

TONE

TRACK 2

TRACK 1

RIGHT

LEFT

3-STEP LESSON

STEP 2 STEP 3

STEP 1

123

(TIE)

789

456

123

REST

DEMO

CTK-620L

CONTENTS

Page

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

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

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

Adjustment .............................................................................................................................................. 12

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

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

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

Exploded View ........................................................................................................................................ 28

Parts List ................................................................................................................................................. 29

SPECIFICATIONS

GENERAL

Keyboard: 61 standard-size keys, 5 octaves (with touch response on/off) Key light system: Can be turned on and off (up to 10 keys can be lit at the same time) Tones: 137 (128 General MIDI tones + 9 drum tones); with layer and split Rhythm instrument tones: 61 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/NORMARL FILL-IN, VARIATION/

VARIATION FILL-IN, SYNCHRO/ENDING

Accomp volume: 0 to 127 (128 steps)

3-step lesson: 3 lessons (step 1, 2, 3)

Playback: Repeat play of a single tune

Song bank

Number of tunes: 100 Controllers: PLAY/PAUSE, STOP, FF, REW, LEFT, RIGHT

Musical information function: Tone, Auto Accompaniment, Song Bank numbers and names; staff nota-

tion, tempo, metronome, measure and beat number, step lesson display, chord name, dynamic mark, fingering, pedal operation

Metronome: On/Off

Beat specification: 1 to 6

Memory

Songs: 2 Recording tracks: 2 Recording methods: Real-time, step

Memory capacity: Approximately 5,200 notes (total for two songs) MIDI: 16 multi-timbre receive, GM Level 1 standard Other functions

Transpose: 25 steps (–12 semitones to +12 semitones)

Tuning: 101 steps (A4 = approximately 440 Hz ± 50 cents) Terminals

MIDI terminals: IN, OUT

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

Headphone/output terminal: Stereo standard jack

Output Impedance: 100 Ω

Output voltage: 4.5 V (RMS) MAX

— 1 —

Power jack 9 V DC Power supply: 2-way

Batteries: Six D-size batteries

Battery life: Approximately 5 hours continuous operation on manganese batteries

AC adaptor: AD-5

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

abled under battery power only, can be disabled manually. Speaker output: 2.5 W + 2.5 W Power consumption: 9 V --- 7.7 W Dimensions (HWD): 96.1 × 39.1 × 14.4 cm (37 7/8 × 15 3/8 × 5 11/16 inches) Weight: Approximately 6.0 kg (13.25 lbs) (without batteries)

ELECTRICAL

Current drain with 9 V DC: No sound output 200 mA ± 20 % Maximum volume 1090 mA ± 20 %

with 10 keys from F1 to A2 pressed in French Horn Volume: maximum, Touch response: maximum Reverb: stage

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

with key C1 for R-ch, F1 for L-ch in French Horn Volume: maximun, Touch response: maximum 2300 mV ± 20 % Reverb: stage

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

with key C1 for R-ch, F1 for L-ch in French Horn Volume: maximun, Touch response: maximum 180 mV ± 20 % Reverb: stage

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

with key C1 for R-ch, F1 for L-ch in French Horn Volume: maximun, Touch response: maximum 2600 mV ± 20 % Reverb: stage

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 IC1

RN5VD40AA

Sound Source ROM

(24M-bit)

LSI3

LH536PNV

RDCEB

Chip Selector

IC2,3

Effect RAM

(256K-bit)

LSI5

TC55257DFL-

70L(EL)

RESET

MA0 ~ MA19 MCSB0

MCSB0, 1 MA19

CE1B ECEB

EA0 ~ EA14

EIO0 ~ EIO7

Working Storage

RAM (256K-bit)

LSI4

TC55257DFL-70L(EL)

RACEB

MA0

MA14

MD0 ~ MD15

MA0, MA1

MD0

MD7

HG51B277FB-1

LRCK SO BCK

D/A Converter

UPD6379GR-E1

MIDI

CPU LSI1

GT913F(T)

LRCK, SO BCK, SINK

DSP LSI2

LSI6

LCD Driver

INOUT

PO10, PO17 PO22, PO23

PA4 ~ PA6

MD0 ~ 3

UPD65005

MA0 ~ 2

LCBE

KI0 ~ KI2

FI9 FI10

NMI

PA0, PA1

PB0 ~ PB3

PB4

LSI7

GF-419

LSI401

SED1278F0A

FI0 ~ FI7 SI0 ~ SI7

KC0 ~ KC7

LED

Driver

Q12 ~ Q14

LED

Driver

Q1 ~ Q11

VCC

SEG1 ~ SEG40

COM1 ~ COM16

VDD

Power Switch

Buttons

Assingnable Jack

DVDD VLCCLVDDLCDD

AVDD

LCD

Illuminant

Keyboard

L21 ~ L23

LED L0 ~ L20

VDD VC

Speakers

(L)

(R)

Phones/ Output

Filter

Q213 ~ Q216

Main Volume

Power Amplifier

IC201

TA8229K

L OUTR OUT

— 3 —

APO

Power Supply Circuit

Q201 ~ Q208,

D206 ~ 208, D210

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) C6# (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)

BUTTON MATRIX

KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7

KI0 MEMORY STEP 2 3 TONE 5 KI1 STEP STEP 3 — 7 6 ACC. VOL. TIME METRO KI2 STEP 1 0 + 4 DEMO TOUCH REVERB FI9 2 RHYTHM 9 KEYLIGHT

FI10 SPLIT 1 SONG 8

PB0 INTRO PB1 FINGERED

PB2

PB3 NORMAL

LAYER

NORMAL

FILL-IN

VARIATION

FILL-IN

START/

STOP

TRACK 1/

RIGHT

TRACK 1/

LEFT

PA0 PA1

FULL RANGE

CHORD

CASIO

CHORD

— 4 —

TEMPO TEMPO

PLAY/PAUSE

FF REWIND

STOP

SYNCHRO/

ENDING

TRANSPOSE/

TUNE/MIDI

LED MATRIX

0L1L2L3L4L5L6L7L8L9L01L

12L#2A4F4B5E5A6D6G7C#6A#6G#6F

22L#2G4E4A5D5G6C6F6B#5A#6C#6D

32L2C4D4G5C5F5B6E6A#5G#5F#5D

11L21L31L41L51L61L71L81L91L02L

12L#3C#3D#3F2G3C3F#4D#4C#3A#3G

22L#2F#2D#2C2F2B3E#4F#4G#4A#5C

32L 2D2E2A3D3G3A3B4C

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

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

Second contact (2)

F#4 G#4

A#4

C#5

D#5

Key

First contact (1)

F#5 G#5

A#5

G#6F#6D#6

C#6

A#6

B6A6G6F6E6D6

— 5 —

POWER SUPPLY CIRCUIT

The power supply circuit generates seven voltages as shown in the following table. VDD voltage is always generated. The others are controlled by APO signal from the CPU.

emaNegatloVfonoitareporoF

DDVV5+

revirdDEL

,MARtceffE,MARegarotsgnikroW,MORecruosdnuoS,PSD,CIteseR,UPC

DDVDV5+UPCkcajIDIM,kcajniatsuS, DDVAV5+retliF,CAD

DDVLV5+AG

CCVV9+reifilpmarewoP

CCLVV2+pmaltoliP DDCLV6.5+revirdDCL

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

IC1

RN5VD40AA

POWER

From power switch

RESET

RSTB

NMI

CPU LSI1

GT913F

VDD

SCK0

PLE

Reset signal

APO

RESB

To power supply circuit

DSP LSI2

HG51B277FB-1

VDD

— 6 —

CPU (LSI1: GT913F)

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

10DXTtuOdesutoN 20DXRnIdesutoN 30KCStuOtuptuolangis)ffOrewoPotuA(OPA 41DXTtuOtuptuolangisIDIM 51DXRnItupnilangisIDIM 61KCStuOtuptuoeslupgnizinorhcnysZHM1 7CCVAnIecruos)V5+(DDVD

.lanimretnoitcetedrotpadaCA

80NAnI

.detcennocsirotpada

91NA— .dnuorgotdetcennoC.desutoN

dnaseirettabybderewopsidraobyekehtnehwV5+

CAnehwnoitcnufOPAehtlecnacotV0semoceb

01DNGAnIecruos)V0(dnuorG 11KCBtuOtuptuokcolctiB 21OStuOtuptuoataddnuoslaireS 31KCRLtuOtuptuokcolcdroW 41DNGnIecruos)V0(dnuorG

61,511TLX,0TLXtuO/nItuptuo/tupnikcolczHM03

71CCVnIecruosV5+

91,811DM,0DMnIlanimretnoitcelesedoM 02BTSRnItupnilangisteseR 12IMNnItupnilangisNOrewoP 2201P/TNItuO/nIrevirdDCLehtrofsubataD

03~32 83~137CK~0CKtuOlangisnacsyekroflanimreT 64~93

84,748IS,8IF—desutoN 949IFnIlangistupninottubroflanimreT 059ISnIrevirdDCLrofsubataD

3IF~0IF 3IS~0IS

7IF~4IF 7IS~4IS

nIlangistupniyekroflanimreT

1501IFnIlangistupninottubroflanimreT 2532P/01IStuOrevirdDCLehtrofsubataD

55~352IK~0IKnIlangistupninottubroflanimreT

65BNWMtuOPSDehtroflangiselbaneetirW

— 7 —

.oNniPlanimreTtuO/nInoitcnuF

67~7591AM~0AMtuOsubsserddA

87,771BSCM,0BSCMtuO 972BSCMtuOdesutoN

08CCVnIecruosV5+ 18DNGnIecruos)V0(dnuorG 28BDRMtuOMORecruosdnuosehtroftuptuolangiselbanedaeR

89~3851DM~0DMtuO/nIsubataD

99ELPtuOPSDehtroftuptuolangisteseR

00171PtuO/nIrevirdDCLehtrofsubataD

PSDdnaMARgnikrow

,MORecruosdnuosehtroftuptuolangiselbanepihC

DIGITAL SIGNAL PROCESSOR (LSI2: HG51B227FB-1)

The DSP receives 16-bit serial sound data output from the CPU and adds the selected effect to the sound data using the effect RAM. Then the DSP provides the sound data to the DAC. The DSP also controls button input/ output and GA. The following table shows the pin functions of LSI2.

.oNniPlanimreTtuO/nI

08,3~13BP~0BPnIslanimrettupninottuB 44BPnItupnikcaJELBANGISSA 5OStuOCADehtroftuptuoataddnuoslaireS 6OKCWtuOCADehtroftuptuokcolcdroW 73DDVnIecruosV5+ 8TSET—desutoN 9BSERnItupnilangisteseR

012SSVnIecruos)V0(dnuorG

21,11TUOX,NIXtuO/nItuptuo/tupnikcolczHM02 31IKCWnIUPCehtmorftupnikcolcdroW 41ISnIUPCehtmorftupniataddnuoslaireS 51IKCBnIUPCehtmorftupnikcolctiB 61CNISnItupnieslupgnizinorhcnyszHM1 712DDVnIecruosV5+

52~817OI~0OItuO/nIsubataD 62BECRtuOAGehtroftuptuolangiselbanepihC 723SSVnIecruos)V0(dnuorG

noitcnuF

821DAnIsubsserddA 92BEOtuOMARegarotsgnikrowroflangiselbanetuptuO 03BEWnIMARegartsgnikrowroflangiselbaneetirW 133DDVnIecruosV5+ 232ECnI.evitcahgiH.tupnilangiselbanepihC 330DAnIsubsserddA

— 8 —

Pin No. Terminal In/Out Function

34 CE1B In Chip enable signal input. Low active.

35 ~ 41, 43 EIO0 ~ EIO7 In/Out Data bus for the effect RAM

42 , 44, 46 ~ 48,

51 ~ 59, 61

45 ECEB Out Chip enable signal output for the effect RAM 49 EOEB Out Output enable signal for the effect RAM 50 VSS3 In Ground (0 V) source

60 BWEB Out Write enable signal output for the effect RAM 62, 66, 70, 74, 78 VSS2 In Ground source 63, 67, 71, 75, 79 VDD2 In +5 V source

64, 65 PA0, PA1 Out Button scan signal output

68, 69, 77 PA2, PA3, PA7 — Not used

72 PA4 Out Data/command signal for LCD driver

73 PA5 Out Read/write signal for LCD driver

76 PA6 Out Chip enable signal for LCD driver

EA0 ~ EA14 Out Address bus for the effect RAM

LCD DRIVER (LSI401: SED1278F0A)

The LCD driver can drive a dot matrix LCD having 40 segment and 15 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 LSI 401.

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

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

39 ~ 42 DB0 ~ DB3 — Not used. Connected to GND (0 V) 43 ~ 46 DB4 ~ DB7 In/Out Data bus

47 ~ 53, COM1 ~ COM7

55 ~ 62 COM9 ~ COM16

54 COM8 — Not used

SEG1 ~ SEG40 Out Segment signal output

Terminals for the built-in clock pulse generator.The external resistor connected determines the oscillation requency. LCD drive voltage input. Those voltages are used for generating the stepped pulse of

the LCD drive signals.

Data/command determination terminal. High: data, Low: command

Chip enable signal. High: enable, the writing is done at fall edge. Low: disenable

Out Common signal/output

— 9 —

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