Casio CTK-2000 Troubleshooting guide

ELECTRONIC KEYBOARD
(without price)
CTK-2000
MAY. 2008
CTK-2000
Ver.2 : Nov. 2008

CONTENTS
SPECIFICATIONS ------------------------------------------------------------------------------------------ 1
BLOCK AND WIRING DIAGRAM --------------------------------------------------------------------- 2
PCB LAYOUT ----------------------------------------------------------------------------------------------- 3
CIRCUIT DESCRIPTION --------------------------------------------------------------------------------- 4
PRINTED CIRCUIT BOARDS -------------------------------------------------------------------------- 5
DISASSEMBLY --------------------------------------------------------------------------------------------- 8
DIAGNOSTIC PROGRAM ------------------------------------------------------------------------------13
EXPLODED VIEW ----------------------------------------------------------------------------------------16
PARTS LIST ------------------------------------------------------------------------------------------------17
SCHEMATIC DIAGRAMS -------------------------------------------------------------------------------20

– 1 –
SPECIFICATIONS
Keyboard
Maximum Polyphony
Tones
Built-in Tones
Sampling Tones
Reverb
Metronome
Beats per Measure
Tempo Range
Song Bank
Tunes
Step Up Lesson
Lessons
Lesson Part
Functions
Music Challenge
Auto Accompaniment
Rhythm Patterns
Other Functions
Transpose
Tuning
MIDI
Musical Information Function
Inputs/Outputs
USB port
Sustain jack
Phones/Output jack
Audio In jack
Power Jack
Power Supply
Batteries
Battery Life
AC Adaptor
Auto Power Off
Speakers
Output
Power Consumption
Dimensions
Weight
61 standard-size keys
48 notes (24 for certain tones)
400
1
Sampling time: 1 second (fixed)
Effects: 10 types
1 to 10, Off
0, 2 to 6
30 to 255
110
4 (Listen, Watch, Remember, Auto)
L, R, LR
Repeat, Voice Fingering Guide, Note Guide, Performance Evaluation
20 notes
150
±1 octaves (12 semitones)
A4 = approx. 440 Hz ±100 cents
16 multi-timbre received, GM Level 1 standard
Tone, Rhythm, Song Bank, numbers and names; staff notation, fingering,
pedal operation, tempo, measure and beat number, chord name, etc.
TYPE B
Standard jack (sustain, sostenuto, soft, rhythm start/stop)
Stereo standard jack
Output Impedance: 200Ω, Output Voltage: 4.8V (RMS) MAX
Stereo mini jack
Input Impedance: 40kΩ, Input Sensitivity: 200mV
9V DC
2-way
6 AA-size zinc-carbon batteries or alkaline batteries
Approximately 4 hours continuous operation on alkaline batteries
AD-5
Approximately 6 minutes after last key operation (Operates during battery use only)
10cm × 2
2W + 2W
9V 7.7W
94.9 × 35.4 × 11.2 cm (37 3/8× 13 15/16× 4 7/16inch)
Approximately 3.8kg (8.4 lbs) (without batteries)

– 2 –
BLOCK AND WIRING DIAGRAM
MAIN PCB
(M800-MDA1)
SUB PCB
(M800-PSA1)
CONSOLE PCB
(M800-CNA)
CONSOLE PCB (M800-CNB)
MA1 ~ MA21
DB4 ~ DB7,E,R/W,RS (LCD signal)
KC0 ~ KC7,KI1,KI2,F19,FI10 (Button signal)
NMI
VE5
VD5
VD3
NMI
VCP
VCP
D103
MD0 ~ MD15
KC0 ~ KC7,FI0 ~ FI3,SI0 ~ SI3
P2ROM
(16Mbit)
IC2
POWER
CIRCUIT
Q101,Q102,
D104,D106
Power
Amplifier
IC101
LCD CONTROLLER
IC401
D/D CONVERTER
IC4,IC5
M800-KYA2 M800-KYA1
LOUT,ROUT
APO
APO
VC
VC
ADIN
PEDAL
(L) (R)
Filter
IC3
Filter
IC2
Filter IC6
D107
MPU
IC1
CN801 (13pin)
CN1 (16pin)
CN6 (10pin)CN5 (12pin) CN3 (11pin)
CN109 (11pin)
CN404 (10pin)CN405 (12pin)
CN401 (8pin)
CN302 (8pin) CN301 (8pin)
CN106 (8pin)
CN803 (16pin)CN802 (13pin)
PHONES
POWER SW
MIAN VOL
SPEAKERS
LCD
USB
DC JACK
AUDIO IN
PEDAL

– 3 –
PCB LAYOUT
PCB Components
MAIN PCB M802-MDA1 MPU, ROM(16Mbit), D/D converter, USB terminal
SUB PCB M800-PSA1 Power supply circuit, Power amplifer
Phones terminal, Pedal terminal, Audio terminal, DC JACK
Console PCBs M802-CNA LCD controller, Button
M802-CNB Power switch, Main volume, Button
Keyboard PCBs M802-KYA1 Keyboard
M802-KYA2
M800-MDA1 PCB
M800-CNA PCB
M800-PSA1 PCB
M800-CNB PCB
M800-KYA1 PCB M800-KYA2 PCB

– 4 –
CIRCUIT DESCRIPTION
KEY MATRIX
NOMENCLATURE OF KEYS
KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7
KI0 C2 C2# D2 D2# E2 F2 F2# G2
KI1 G2# A2 A2# B2 C3 C3# D3 D3#
KI2 E3 F3 F3# G3 G3# A3 A3# B3
KI3 C4 C4# D4 D4# E4 F4 F4# G4
KI4 G4# A4 A4# B4 C5 C5# D5 D5#
KI5 E5 F5 F5# G5 G5# A5 A5# B5
KI6 C6 C6# D6 D6# E6 F6 F6# G6
KI7 G6# A6 A6# B6 C7
C2 C3 C4 C5 C6 C7
BUTTON MATRIX
KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7
KI1 TONE SONG TEMPO
UP
GAME WAIT PLAY/
STOP
METRONOME REPEAT
KI2 RHYTHM TEMPO
DOWN TYPE
PHRASE
START/
STOP REW FUNCTION FF
KI9 0 1 2 3 4 5 6 -
KI10 7 8 9 + GUIDE PAUSE PART
SELECT SAMPLING

– 5 –
PRINTED CIRCUIT BOARDS
Main PCB M800-MDA1 Sub PCB M800-PSA1
Top View
Bottom View
Top View
Bottom View

– 6 –
Console PCB M800-CNB
Top View
Bottom View
Console PCB M800-CNA

– 7 –
Key PCB M800-KYA1
Key PCB M800-KYA2

– 8 –
DISASSEMBLY
1. Remove the battery cover and then battery.
2. Remove 11 screws and then upper case.
3. Remove two lead wires by soldering.
4. Remove cable by soldering.
5. Make the keyboard unit and the main unit apart.
Read wire (Red)
Read wire (Black)
Cable (CN1)