Casio CTK-4000 Troubleshooting guide

ELECTRONIC KEYBOARD
(without price)
CTK-4000
JUL. 2008
CTK-4000
Ver.2 : Dec. 2008

CONTENTS
SPECIFICATIONS ------------------------------------------------------------------------------------------ 1
BLOCK AND WIRING DIAGRAM --------------------------------------------------------------------- 3
PCB LAYOUT ----------------------------------------------------------------------------------------------- 4
CIRCUIT DESCRIPTION --------------------------------------------------------------------------------- 5
PRINTED CIRCUIT BOARDS -------------------------------------------------------------------------- 7
DIAGNOSTIC PROGRAM ------------------------------------------------------------------------------10
EXPLODED VIEW ----------------------------------------------------------------------------------------13
PARTS LIST ------------------------------------------------------------------------------------------------14
SCHEMATIC DIAGRAMS -------------------------------------------------------------------------------17

– 1 –
SPECIFICATIONS
Keyboard
Touch Response
Maximum Polyphony
Tones
Built-in Tones
Sampling Tones
Functions
Reverb
Chorus
Metronome
Beats per Measure
Tempo Range
Song Bank
Built-in Songs
User Songs
Step Up Lesson
Lessons
Lesson Part
Functions
Music Challenge
Auto Accompaniment
Built-in Rhythms
User Rhythms
Registration
Recorder
Keyboard Play
Playing Along with a
Built-in Songs
Memory Capacity
Other Functions
Transpose
Octave Shift
Tuning
Scale Tuning
Music Preset
One Touch Preset
Auto Harmonize
Arpeggiator
MIDI
Musical Information Function
61 standard-size keys
2 types, Off
48 notes (24 for certain tones)
570
Up to 8 (Melody Sampling: 5, Drum Sampling: 3)*
Up to 10 seconds
Layer, Split
1 to 10, Off
1 to 5, Off
0, 2 to 6
30 to 255
152
Up to 10*
4 (Listen, Watch, Remember, Auto)
L, R, LR
Repeat, Voice Fingering Guide, Note Guide, Performance Evaluation
20 notes
180
Up to 10 (Accompaniment Edit)*
32 (4 setups × 8 banks)
Real-time recording, playback
5 songs, 6 tracks
1 song (L, R, LR)
Approximately 12,000 notes (total for 6 songs)
±1 octaves (12 semitones)
Upper/Lower ±2 octaves
A4 = approx. 440 Hz ±100 cents
Preset Scales
305
180
12 types
90 types
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.

– 2 –
Inputs/Outputs
USB port
Sustain/Assignable jack
Phones/Output jack
Audio In jack
Power Jack
Power Supply
Batteries
Battery Life
AC Adaptor
Auto Power Off
Speakers
Power Consumption
Dimensions
Weight
TYPE B
Standard jack (sustain, sostenuto, soft, rhythm start/stop)
Stereo standard jack
Output Impedance: 200Ω, Output Voltage: 4.5V (RMS) MAX
Stereo mini jack
Input Impedance: 9kΩ, Input Sensitivity: 200mV
9V DC
2-way
6 D-size zinc-carbon batteries or alkaline batteries
Approximately 5 hours continuous operation on zinc-carbon batteries
AD-5
Approximately 6 minutes after last key operation (Operates during battery use only)
12cm × 2 (Output: 2.5W + 2.5W)
9V 7.7W
95.0 × 37.6 × 13.0 cm (37 7/16× 14 13/16× 5 /8 inch)
Approximately 4.6kg (10.1 lbs) (without batteries)
• Design and specifications are subject to change without notice.
* This data is stored in a shared memory area with a total capacity of approximately 320Kbytes
(1Kbyte = 1,024bytes).

– 3 –
BLOCK AND WIRING DIAGRAM
KC5~KC7,
FI4~FI7,
SI4~SI7
KC0~KC4,FI0~FI3,SI0~SI3
MD0 ~ MD15
MD0 ~ MD15
MA1~ MA18
MA1~MA23
VA5
VCP
VD5
VA3
VDP3
VD3
VD3
IC3
IC6
IC2
Power Supply Circuit
Q1~Q3,Q7,D105,203
VC
VD5 VCP VA5
LVD5
CN22 CN18
CN14 CN15
VD3
CN2 (13pin)
CN801 (13pin) CN802 (10pin) CN803 (10pin) CN804 (11pin)
CN7 (4pin)
CN3 (11pin)CN3 (11pin)
CN1 (15pin)
CN1 (15pin)
CN3 (5pin)
CN5 (5pin)
CN4 9pin)
CN3 (15pin)
CN6 CN7
CN5 CN4
CN19 (5pin)CN18 (9pin)
MAIN PCB (M804-MDA1)
CONSOLE PCB (M804-PSA1)
CONSOLE PCB
(M805-CNB2)
CONSOLE PCB
(M805-CNA1)
KEYBOARD PCB
(M802-KYA1)
KEYBOARD PCB
(M802-KYA2)
SRAM(4Mbit)
IC9
P2ROM(128Mbit)
IC1
Keyboard Keyboard
MPU
IC7
Filter
IC5
POWER
SUPPLY
CIRCUIT
Filter
IC2
CONSOLE PCB
(M805-CNB1)
BUTTON
CONTROLLER
IC2
LCD
CONTROLLER
IC1
Power Amplifier
IC1
Filter
IC3
*Not used: 12pin-15pin

– 4 –
PCB LAYOUT
PCB Components
MAIN PCB M804-MDA1 MPU, Reset IC, SRAM(4Mbit), P2ROM(128Mbit), Key controller,
SD card, USB, Power supply circuit
SUB PCB M804-PSA1 Power supply circuit, Power amplifer, Phones terminal,
Phone terminal, Pedal, DC IN jack
Console PCBs M805-CNA1 LCD, LCD contorller, Button, Button contorller
M805-CNA2 Speaker
M805-CNA3 Speaker
M805-CNB1 Power SW, Button
M805-CNB2 Main volume
Keyboard PCBs M802-KYA1 Keyboard
M802-KYA2
M805-CNA1 PCBM804-PSA1 PCB
M805-CNB1 PCB
M805-CNB2 PCB
M804-MDA1 PCB
M802-KYA2 PCBM802-KYA1 PCB

– 5 –
Note: Each key has two contacts, the first conatct 1 and second contact 2.
Key
Second contact First contact
FI
KC
SI
21
NOMENCLATURE OF KEYS
CIRCUIT DESCRIPTION
KEY MATRIX
KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7
FI0 C2C2#D2D2#E2F2F2#G2
SI0 C2C2#D2D2#E2F2F2#G2
FI1 G2#A2A2#B2C3C3#D3D3#
SI1 G2#A2A2#B2C3C3#D3D3#
FI2 E3F3F3#G3G3#A3A3#B3
SI2 E3F3F3#G3G3#A3A3#B3
FI3 C4C4#D4D4#E4F4F4#G4
SI3 C4C4#D4D4#E4F4F4#G4
FI4 G4#A4A4#B4C5C5#D5D5#
SI4 G4#A4A4#B4C5C5#D5D5#
FI5 E5F5F5#G5G5#A5A5#B5
SI5 E5F5F5#G5G5#A5A5#B5
FI6 C6C6#D6D6#E6F6F6#G6
SI6 C6C6#D6D6#E6F6F6#G6
FI7 G6#A6A6#B6C7
SI7 G6#A6A6#B6C7
C2 C3 C4 C5 C6 C7

– 6 –
BUTTON MATRIX
SW00 SW01 SW02 SW03 SW04 SW05 SW06
SWI0 SAMPLING RECORDER RHYTHM CARD 4 8 9
SWI1 SCALE
EDITOR FUNCTION SONG BANK TONE 7 5 6
SWI2 RHYTHM
EDITOR
METRONOME LISTEN WATCH 1 2 +
SWI3 TEMPO
DOWN
START/
STOP
REMEMBER NEXT 0 - 3
SWI4
CHORDS/
ACCOMP
ON_OFF
TEMPO
UP AUTO
MUSIC
CHALLENGE
SPLIT LAYER
AUTO
HARMONIZE/
APPEGGIATOR
SWI5 VARIATION/
FILL-IN
SYNCHRO/
ENDING
SWI6 NORMAL/
FILL-IN INTRO

– 7 –
PRINTED CIRCUIT BOARDS
Main PCB M804-MDA1
Top View
Bottom View
Sub PCB M804-PSA1
Top View
Bottom View

– 8 –
Console PCB M805-CNA1
Top View
Bottom View
Console PCB M805-CNA2 Console PCB M805-CNA3
Console PCB M805-CNB1
Console PCB M805-CNB2