Casio CTK-611 Service manual

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CTK-611

INDEX

100 RHYTHMS

PITCH BEND MODE VOLUME INTRO SYNCHRO/ENDING

FULL RANGE CHORD FINGERED

POWER

CASIO CHORD NORMAL

MAX

MIN

NORMAL/FILL-IN VAR/FILL-IN

START

STOP

200 TONES

REVERB

HALL

STAGE

SYNTH

ROOM SYNTH MIXER

MEMORY

MIXER

TEMPO

STEP

MEMORY

MEMORY TRACK/DRUM PAD

CHORD/1 23456

STEP

ACCOMP VOLUME

GM FREE SESSION LAYER SPLIT TOUCH RESPONSE

DEMO

TRANSPOSE/

TUNE/MIDI

FREE

SESSION

LAYER

SPLIT

TOUCH

RESPONSE

RHYTHM TONE

CURSOR

ENTER

ENVELOPE

AMP

PITCH

ENVELOPE

000-048 DECAY 00 FLAT

049-137 SUSTAIN 01-19 VIBRATO

20-49 OTHERS

CTK-611

ELECTRONIC KEYBOARD

CONTENTS

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

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

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

Adjustment ..................................................................................................................................... 11

Major Waveforms ........................................................................................................................... 12

Printed Circuit Boards .................................................................................................................... 13

Schematic Diagrams ...................................................................................................................... 14

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

Parts List ........................................................................................................................................ 20

SPECIFICATIONS

GENERAL

Keyboard: 61 standard-size keys, 5 octaves (with touch response on/off) Drum pads: 6 Tones: 200 (128 General MIDI, 32 synthesized, 8 drum, 32 user); with layer and

split Rhythm instrument tones: 51 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/NORMAL FILL-IN, VARIATION/VARI-

ATION FILL-IN, SYNCHRO/ENDING

Accomp volume: 0 to 127 (128 steps)

Free session

Number of patterns: 100 (auto-accompaniment in accordance with selected chord progres-

sion) Memory function

Songs: 2 Recording tracks: 6 (2 through 6 are melody tracks) Recording methods: Real-time, step Memory capacity: Approximately 5,200 notes (total for two songs)

Edit function: Equipped Demo tunes: 2 Synthesizer function

Parameters: PCM set, amp envelope set, attack rate, release rate, pitch envelope set,

pitch, level, touch sense, pan

Mixer function

Channels: 16

Parameters: Program change number, volume, expression, pan, coarse tuning, fine

tuning, on/off/solo MIDI: 16 multi-timbre receive, GM Level 1 standard Other functions

Pitch bend range: 12 semitones upwards and downwards Transpose: 25 steps (–12 semitones to +12 semitones) Tuning: Variable (A4 = approximately 440 Hz ± 50 cents)

Terminals

MIDI terminals: IN, OUT Assignable terminal: Standard jack (sustain, sostenuto, soft, rhythm start/stop) Headphone/Output terminal: Stereo standard jack

Output Impedance: 120 Ω

Output Voltage: 4.5 V (RMS) MAX

Power supply terminal: 9 V DC

Power supply: Dual power supply system

Batteries: 6 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): 93.1 × 37.3 × 12.0 cm (36 11/16 × 14 11/16 × 4 3/4 inches) Weight: Approximately 5.0 kg (11.0 lbs) (without batteries)

— 1 —

ELECTRICAL

Current drain with 9 V DC: No sound output 340 mA ± 20 % Maximum volume 1012 mA ± 20 %

with 12 keys from C3 to B3 pressed in Square wave tone Volume: maximum, Touch response: maximum Reverb: Hall

Phone output level (Vrms with 8 Ω load each channel): L-ch 90 mV ± 20 %

with key C6 pressed in Bassoon tone R-ch 100 mV ± 20 % Volume: maximum, Touch response: maximum Reverb: Hall

Speaker output level (Vrms with 4 Ω load each channel): L-ch 1150 mV ± 20 %

with key F5 pressed in Bassoon tone R-ch 1000 mV ± 20 % Volume: maximum, Touch response: maximum Reverb: Hall

Output level (Vrms with 47k Ω load each channel): L-ch 1200 mV ± 20 %

with key F5 pressed in Bassoon tone R-ch 1000 mV ± 20 % Volume: maximum, Touch response: maximum Reverb: Hall

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

(16M-bit)

LSI3

UPD23C16000WGX-

C51

Effect RAM

(256K-bit)

LSI5

TC55257DFL-

70L(EL)

RESET

MA0 ~ MA19

MA0, MA1

EA0 ~ EA14

EIO0 ~ EIO7

Working Storage

RAM (256K-bit)

LSI4

TC55257DFL-70L(EL)

MA0

MA14

MD0 ~ MD15

MD0

MD7

DSP LSI2

HG51B277FB-1

MIDI

LRCK, SO BCK, SINK

INOUT

UPD913GF-3BA

P10, P13 P14, P17

CPU LSI1

NMI

PA0 ~ PA5

PB0 ~ PB3

P23

FI10

LCD Driver

LSI401

SED1278F2A

FI0 ~ FI9 SI0 ~ SI9

KC0 ~ KC7

KI0 ~ KI2 PB0 ~ PB3

VDD

SEG1 ~ SEG40

LCD

COM1 ~ COM16

Keyboard

Power Switch

Buttons

Speakers

Output

LRCK SO BCK

D/A Converter

LSI6

UPD6379GR

Filter

Q107 ~ Q110

Main Volume

Power Amplifier

IC101

TA8248K

PB4

APO

Assingnable Jack

VCC

AVDD

Power Supply Circuit

Q101 ~ Q105,

D106/107, D190

DVDDLVDD

VDD

— 3 —

CIRCUIT DESCRIPTION

KEY MATRIX

KC0 KC1 KC2 KC3 KC4 KC 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) #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

Drum Pad Drum Pad Pitch Bend H

FI10

KI0

KI1

KI2

PB0

PB1 Fingered

PB2 Casio Chord

PB3 Normal

31HEnter

Drum Pad Drum Pad Pitch Bend Start/

42GStop

Drum Pad

5 H

Drum Pad

6 G Tune/MIDI

PA0 PA1 PA2 PA3

Full Range

Chord Response

Step

Memory

Normal/

Synchro/

Ending

Variation/

Tempo

Intro

Fill-In Volume

Fill-In

E 7 2 0 Demo

F 45 1

Touch

Free Session

Layer Synth

Split Mixer

9 6 + Tone

8 3 — Rhythm

Transpose/

Reverb

Accomp

— 4 —

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

NOMENCLATURE OF KEYS

Second contact (2)

Key

First contact (1)

C#2

C2 D2E2F2

F#2D#2

A2 B2 C3 D3

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

POWER SUPPLY CIRCUIT

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

Name Voltage For operation of

VDD +5 V CPU, Reset IC, DSP, Sound source ROM, Working storage RAM, Effect RAM DVDD +5 V LCD driver, Power jack, Sustain jack, MIDI jack AVDD +5 V DAC, Filter LVDD +5.6 V LCD dirver

VCC +9 V Power amplifier, Pilot lamp

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

VDD

CPU LSI1

UPD913GF-3BA

SCKO

NMI

— 5 —

Reset signal

PLE

HG51B277FB-1

APO

To power supply circuit

VDD

DSP LSI2

CPU (LSI1: UPD913GF-3BA)

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.

Pin No. Terminal In/Out Function

1 TXD0 Out MIDI signal output 2 RXD0 In MIDI signal input 3 SCK0 Out APO (Auto Power Off) signal output

4, 5 TXD1, RXD2 In/Out Data bus for the LCD driver

6 SCK1 Out 1 MHZ synchronizing pulse output 7 AVCC In DVDD (+5 V) source

AC adaptor detection terminal.

8 AN0 In

9 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

20 RSTB In Reset signal input 21 NMI In Power ON signal input 22 INT/P10 In/Out Data bus for the LCD driver

23 ~ 30 31 ~ 38 KC0 ~ KC7 Out Terminal for key scan signal

39 ~ 46

47 ~ 50

51 FI10 In Terminal for button input signal 52 SI10/P23 Out Chip enable signal for the LCD driver

53 ~ 55 KI0 ~ KI2 In Terminal for button input signal

56 MWNB Out Write enable signal for the DSP

57 ~ 76 MA0 ~ MA17 Out Address bus

77 MCSB0 Out Chip enable signal output for the sound source ROM 78 MCSB1 Out Not used 79 MCSB2 Out Chip enable signal output for the DSP

FI0 ~ FI3

SI0 ~ SI3

FI4 ~ FI7

SI4 ~ SI7

FI8, FI9

SI8, SI9

In Terminal for key input signal

— Not used

+5 V when the keyboard is powered by batteries and becomes

V to cancel the APO function when AC adaptor is connected.

— 6 —

Pin No. Terminal In/Out Function

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 Reset signal output for the DSP

100 P17 In/Out Data bus for the LCD driver

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. The following table shows the pin functions of LSI2.

Pin No. Terminal In/Out Function

1 ~ 3, 80 PB0 ~ PB3 In Button input terminals

4 PB4 In ASSIGNABLE Jack input 5 SO Out Serial sound data output for the DAC 6 WCKO Out Word clock output for the DAC 7 VDD3 In +5 V source 8 TEST — Not used 9 RESB In Reset signal input

10 VSS2 In Ground (0 V) source

11, 12 XIN, XOUT In/Out 20 MHz clock input/output

13 WCKI In Word clock input from the CPU 14 SI In Serial sound data input from the CPU 15 BCKI In Bit clock input from the CPU 16 SINC In 1 MHz synchronizing pulse input 17 VDD2 In +5 V source

18 ~ 25 IO0 ~ IO7 In/Out Data bus

26 RCEB Out Chip enable signal output for the working storage RAM 27 VSS3 In Ground (0 V) source 28 AD1 In Address bus 29 OEB Out Output enable signal for working storage RAM 30 WEB In Write enable signal 31 VDD3 In +5 V source 32 CE2 In Chip enable signal input. High active. 33 AD0 In Address bus 34 CE1B In Chip enable signal input. Low active.

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

— 7 —

Pin No. Terminal In/Out Function

42 , 44, 46 ~ 48,

51 ~ 59, 61

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

60 EWEB 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, 68, 69,

72, 73 76, 77 PA6/7 Out Not used

EA0 ~ EA12 Out Address bus for the effect RAM

PA0 ~ PA5 Out Button scan signal output

LCD DRIVER (LSI401: 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 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 ~ 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. 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

— 8 —

DAC (LSI6: UPD6379GR)

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 and output them to each channel separately.

Synch signal

L OUT

R OUT

DAC

IC6

UPD6379GR

LRCK

CLK

Data

Word clock

WCKO

Bit clock

DSP LSI2

HG51B277FB

SINC

Word clock

WCKI

Bit clock

BCKI

Data

SCK1

LRCK

BCK

CPU LSI1

UPD913GF-3BA

FILTER BLOCK

Since the sound signals from the DAC are stepped waveforms, the filter block is added to smooth the waveforms.

AVDD

To main volume

22 Ω

Q110 2SC1740SQ.R

0.01 µF

2.2K

AG AG AG

150PF

270PF

Q107

10K10K10K

560PF

2SC1740SQ.R

22K

6.3V 1000 µ

10 V22 µ

10K

18K

From DAC

— 9 —

POWER AMPLIFIER (IC101: TA8248K)

The power amplifier is a two-channel amplifier with standby switch. The following table shows the pin function of IC101.

Pin No. Terminal In/Out Function

1 NC — Not used 2 B.S.2 — Terminal for a bootstrap capacitor 3 OUT2 Out Channel 2 output 4 VCC In +9 V source 5 OUT1 Out Channel 1 output 6 B.S.1 — Terminal for a bootstrap capacitor 7 Power GND In Ground (0 V) source 8 Stand by In Power control signal input. 0 V: Off, +9 V: On

9 DC — Terminal for a decoupling capacitor 10 NF1 In Negative feedback input 11 IN1 In Channel 1 input 12 IN2 In Channel 2 input 13 NF2 In Negative feedback input

14, 15 Pre GND In Ground (0 V) source

— 10 —

ADJUSTMENT

DISPLAY PCB

1) Items to be adjusted: Item Measuring Instrument

Vop voltage setting Voltmeter

2) Adjustment and Test Point Locations

VR401

3) Equipment connection/Procedure

(TOP VIEW)

TP2

Vop voltage setting

Input Connection

51.74°

LCD

Input Point

Eye

Input Signal

Set Voltmeter

Output TP2

Adjust

VR410

Watching the LCD at a 51.74° angle to the horizontal, adjust Vop voltage so that unenergized segments are seen dimly.

Output Connection

Voltmeter TP2

— 11 —

Output Point

Adjust for

Adjust for 4.3 to 4.4 V reading on voltmeter under the temparature 20 to 25 °C. Make fine adjustment according to the following instruction.

MAJOR WAVEFORMS

CH1: 5 V–CH2: 5 V

1 NMI signal

JE connector pin 16

2 APO signal

JD connector pin 9

0.5 s

Power button ON

–

50 µs

CH1

CH2

CH1

CH1: 5 V–CH2: 5 V

3 Button scan signal PA0

JD connector pin 14

4 Button scan signal PA1

JE connector pin 14

Power ON

20 ms

–

0.5 s

CH1

CH2

CH1

CH1: 50 mV

9 DAC output (L-ch)

JD connector pin 6

0 Dac output (R-ch)

JD connector pin 7

1 ms

CH2: 50 mV

1 ms

CH1

CH2

CH1: 50 mV˜CH2: 50 mV

A Sound signal (L-ch)

JF connector pin 2

B Sound signal (R-ch)

JF connector pin 1

Tone : Whistle (078) Key : A4 Touch response : Off Reverb : Off Volume : Maximum

CH1: 5 V–CH2: 5 V

5 Key scan signal KC0

JB connector pin 1

6 Key scan signal KC1

JB connector pin 2

CH2

–

CH1: 5 V–CH2: 5 V

–

CH2

7 RS signal PA4

JC connector pin 7

8 R/W signal PA5

JC connector pin 6

— 12 —

Sub PCB JCM462-MA2M

PRINTED CIRCUIT BOARDS

Main PCB JCM462-MA1M

Top View

Bottom View

— 13 —

Main PCB JCM462-MA1M

SCHEMATIC DIAGRAMS

— 14 —

Sub PCB JCM462-MA2M/Volume PCB JCM462-MA3M

— 15 —

Display PCB JCM462-LCD1M

— 16 —

Keyboard PCBs JCM617T-KY1M/KY2M

— 17 —

LCD Common

SEG 1

SEG 2

SEG 3

SEG 4

SEG 5

SEG 6

SEG 7

SEG 8

SEG 9

SEG10

SEG11

SEG12

SEG13

SEG14

SEG15

SEG16

SEG17

SEG18

SEG19

SEG20

SEG21

SEG22

SEG23

SEG24

SEG25

SEG26

SEG27

SEG28

SEG29

SEG30

SEG31

SEG32

SEG33

SEG34

SEG35

SEG36

SEG37

SEG38

SEG39

SEG40

COM 1

COM 2

COM 3

COM 4

COM 5

COM 6

COM 7

COM12

COM13

COM14

COM15

Segment

SEG 1

SEG 2

SEG 3

COM16

SEG17

SEG 8

SEG 4

SEG 5

SEG 6

SEG 9

SEG10

SEG 7

SEG 8

SEG 9

SEG32

COM 9

SEG33

SEG10

SEG11

SEG34

SEG35

SEG36

SEG12

SEG13

SEG14

SEG37

SEG38

SEG39

SEG15

SEG16

SEG17

SEG40

SEG 3

COM12

SEG18

SEG19

SEG20

SEG 2

SEG 1

SEG11

SEG21

SEG22

SEG23

COM 9

SEG12

COM16

SEG24

SEG25

SEG26

SEG29

COM15

COM14

SEG27

SEG28

SEG29

COM13

SEG30

SEG31

SEG30

SEG31

SEG32

COM12

COM11

SEG33

SEG34

SEG35

COM10

SEG20

COM 9

SEG36

SEG37

SEG38

SEG19

SEG18

SEG39

SEG40

COM 1

COM13

COM14

COM15

COM 2

COM 3

COM 4

COM16

COM10

COM12

COM 5

COM 6

COM 7

SEG21

COM11

COM12

COM13

COM14

COM15

COM16

SEG17

SEG 8

SEG 9

SEG10

SEG32

COM 9

SEG33

SEG34

SEG35

SEG36

SEG37

SEG38

SEG39

SEG40

SEG 3

COM12

SEG 2

SEG 1

SEG11

COM 9

— 18 —

SEG12

COM16

SEG29

COM15

COM14

COM13

SEG30

SEG31

SEG32

COM12

COM11

COM10

SEG20

COM 9

SEG19

SEG18

COM13

COM14

COM15

COM16

COM10

COM12

SEG21

COM11

EXPLODED VIEW

R-1

R-2

R-3

— 19 —

PARTS LIST

CTK-611

Notes: This parts list does not include the cosmetic parts, which

parts are marked with item No. "R-X" in the exploded view. Contact our spare parts department if you need these parts for refurbish.

1. Prices and specifications are subject to change without prior notice.

2. As for spare parts order and supply, refer to the "GUIDEBOOK for Spare parts Supply", published seperately.

3. The numbers in item column correspond to the same numbers in drawing.

Item Code No. Parts Name Specification Q R

Main PCB

1 6925 8440 PCB/ASS'Y (MA1M) M240613*1 1 B LSI1 2012 4879 LSI/CPU UPD913GF-3BA(T) 1 A LSI2 2012 2079 LSI/DSP HG51B277FB-1 1 A LSI3 2012 5590 LSI/ROM UPD23C16000WGX-C51 1 A

LSI4/LSI5 2012 5572 LSI/RAM TC55257DFL-70L(EL) 2 A

LSI6 2105 4746 LSI/DAC UPD6379GR-E1 1 A

IC1 2012 1883 IC/MOS RN5VD40AA-TR 1 A

MRC1,2,5,6 2845 6456

MRC3,4 2845 6457

X1 2590 2742 X2 2590 2699

Sub PCB ass'y

IC101 2114 5775 IC102

Q101 2250 0742

Q103 2251 0672 Q105 2250 1578

D101/D102

D106 2360 1085 D107 2360 1946 D190 2360 1673 DIODE/ZENER

LED101 2320 3146 LED

J101 3501 7049 JACK/POWER HEC2305-01-330 1 C J102 3612 0665 JACK/PHONE YKB21-5006 1 C J103 3612 0789 JACK YKB21-5010 1 C J104 3501 4816 JACK/DIN YKF51-5051 1 C

VR101 2765 2178 VOLUME EWASC2C95B23 1 C

3 6926 8350 PCB/ASS'Y (LCD1M) M240609*2 1 B

LSI401 2012 6018 LSI/LCD DRIVER SED1278F2A 1 VR401 2775 3286 POTENTIOMETER/CHIP EVM3SSX50B53 1

4 6924 2580 PCB/ASS'Y (KY1M) M140211*5 1

D501 - D564 2301 0101 DIODE 1S2473-T-77-T 64

5 6925 8490 PCB/ASS'Y (KY2M) M140212*9 1

D565 - D622 2301 0101 DIODE 1S2473-T-77-T 58

6 6922 2720 KEY SET/LT WHITE M312118*1 4 A

7 6922 2730 KEY SET/LT WHITE M312118*2 1 A

8 6922 2740 KEY SET/10P BLACK M111726-1 2

9 6922 2750 KEY SET/5P BLACK M111726-2 1 A

10 6922 2761 RUBBER/KEY CONTACT M211704A-1 4 C 11 6922 2771 RUBBER/KEY CONTACT M211705A-1 1 C

12 3122 3546 13 3335 6724 14 6926 6971 15 6926 6991 16 6925 8590

6926 9180 PCB/ASS'Y (MA2,3M) M140554*3 1 B

2252 1248 IC/PHOTOCOUPLER HCPL-261A 1 B

2252 0784

2390 3018 DIODE 1T2 2390 1344

Display PCB

Keyboard PCBs

Keyboard unit

Panel unit

Notes: Q Ð Quantity per unit

R-C NETWORK/CHIP R-C NETWORK/CHIP OSCILLATOR/CRYSTAL OSCILLATOR/CERAMIC

IC/LINEAR (POWER AMP)

TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR

DIODE DIODE/ZENER DIODE/ZENER

MODULE/EL LCD SPACER SPACER RUBBER/INTERCONNECTOR

R Ð Rank

Ñ 20 Ñ

EZAST62AAAJ 4 C EZASS508TAJ 2 C AT-49-30M 1 C EFOB2005E0 1 C

TA8248K 1 A

2SA1703S,T-AN-T 2SC1740SQ,R-TP-T 7 C 2SB1548-P,CS 1 1 2SC4483S,T-AN 1 C

1SS133T-77-T 40 C HZS6B1LTD-T 1 C MTZJ5.6CT-77-T 1 C MTZJ5.6AT-77-T TLR124

YLM-102 1 B LD-B10088E 1 B M440644A-1 1 C M440648A-1 1 C M440426-2 2 B

1 1

C C

A C

B X B X

Item Code No. Parts Name Specification Q R

17 3831 0833 18 6923 4980 19 6925 8610 20 6926 8280 21 22 6926 8290 23 6926 8300 24 25 6906 9071 26 6925 8680 27 6913 6410 28 6921 5030 29 6926 8320 30 6906 9097 COVER/BATTERY M311164G*16 1 31 6926 8520 FILM M440651-1 2

6925 8630

6926 8310 RUBBER/BUTTON M240546-2 1

Accessory

6906 8752 STAND/MUSIC/BAR TYPE M340629B*2 1 6926 8360 STAND/MUSIC/BOARD TYPE M140530-2 1

SPEAKER RUBBER/BUTTON RUBBER/BUTTON RUBBER/BUTTON RUBBER/BUTTON RUBBER/BUTTON RUBBER/BUTTON

RUBBER/BUTTON RUBBER/BUTTON SWITCH/SLIDE KNOB PLATE/DISPLAY

S12J49A 2 B M312122-2 1 B M240543-1 1 B M140516-2 1 B M240544-1 1 B M240544-3 1 B M240545-2 1 B

M240547-2 1 B M240548-1 1 B CSB-12D 1 B M311859-1 2 B M240568-3 1 C

B C

B B

Notes: Q Ð Quantity per unit

R Ð Rank

Ñ 21 Ñ

CASIO TECHNO CO.,LTD.

Overseas Service Division

8-11-10, Nishi-Shinjuku Shinjuku-ku, Tokyo 160-0023, Japan

Casio CTK-611 Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual