Casio Celviano AP-40 User manual

DIGITAL PIANO
AP-40
AP-40
AUG. 2000
Ver.1 Oct. / 2000

CONTENTS
Page
Specifications ..........................................................................................................................................................1
Block Diagram.........................................................................................................................................................2
PCB Layout.............................................................................................................................................................3
Disassembly Instructions ........................................................................................................................................4
Circuit Description ...................................................................................................................................................8
Major Waveforms ..................................................................................................................................................10
Printed Circuit Board .............................................................................................................................................11
Troubleshooting ....................................................................................................................................................12
Wiring Diagram .....................................................................................................................................................16
Exploded View ......................................................................................................................................................17
Parts List ...............................................................................................................................................................19
Schematic Diagrams .............................................................................................................................................22

— 1 —
SPECIFICATIONS
GENERAL
Keyboard: 88 piano keys (with touch response)
Polyphonic: 32 notes, maximum
Tones: • 10 (including two bass tones)
• Tuning Curves: 3 (preset for each tone)
• Layer: Adjustable volume
• Split: Split point, adjustable volume
Digital Effects: Reverb (4 types), Chorus, Tremolo, Brilliance
Demo Tunes: • Number of Tunes: 8
• Playback: Repeat (all tunes, one tune)
Memory: • Operations: Real-time recording, playback
• Number of Tracks: 2 (Track A,Track B)
• Capacity: Approximately 5,000 notes (total of 2 tracks)
• Memory Backup: Built-in lithium battery (Battery Life:5 years)
Song Lesson: • Number of Tunes: 80
• Playback: All song repeat, specific song
• Part Off: L, R
• Phrase Repeat
Pedals: Damper, Soft, Sostenuto
Other Functions: • Metronome: Beat (6 types), Tempo ( = 30 to 300)
• Touch Select: 3 types
• Transpose: 1 octave (F# to C to F)
• Tuning: A4 = 440Hz ±13Hz (adjustable)
• Temperament: 7 types
• Baroque pitch
MIDI: 16 multi-timbre receive
Input/Output: • Headphones: Stereo standard jacks ×2
• LINE OUT (R)(L): Monaural standard jacks ×2
Output impedance: 22KΩ
Output voltage:2.0V (RMS) MAX
• LINE IN (R)(L): Monaural standard jacks ×2
Input impedance: 30KΩ
Input voltage: 200mV
• MIDI (OUT) (IN)
Speakers: Ø 16cm ×2, Ø 5cm ×2 (Output: 30W + 30W)
Power Supply: 120V (for U.S.A.), 120V, 220V, 230V and 240V (for other countries) AC household
current via AC power cord supplied with piano.
Power consumption: 70W (with 120V AC), 90W (with 220V, 230V and 240V AC)
Dimensions: • CELVIANO Only: 139.0 ×54.0 ×24.9 cm (54 3/4×21 1/4×9 13/16 inch)
• CELVIANO and Stand: 139.0 ×54.0 ×88.4 cm (54 3/4×21 1/4×34 13/16 inch)
Weight: • CELVIANO Only: approximately 48.5kg (107.1 lbs)
• CELVIANO and Stand: approximately 63.6kg (140.4 lbs)

— 2 —
BLOCK DIAGRAM
SOLM, SOLP
BDK, WOK1, SORM, SORP
FI0 ~ 10
SI0 ~ 10
DSP
HG51B155FD
LSI 7
RAM 256K
TC55257DFL-70L
ROM 8M
LSI2
LSI3
MSM538002E-
W1-GS-K
CPU
HD6435328RF35F
LSI1
PEDAL
MIDI
IN OUT
ROM 24M
MX23C2410MC-
12CA58
RAM 256K × 2
LSI8,9
LSI6
TC55257DFL-70L
× 2
Keyboard
Controller
HG52E35P
LSI10
Switch & LED
Controller
uPD65005GF-419
LSI301
D/A Converter
uPD6376GS
D/A Converter
uPD6376GS LSI 5LSI 4
Filter
Mixer, Mute Circuit
Power Amp.
STK4132MK
IC405
RA0 ~ 22
RD0 ~ 15
EA0 ~ 14
ED0 ~ 15
D0 ~ 7
D0 ~ 7
L18 ~ 28
KI0 ~ 3
LA ~ LG, LP
LK8 ~ 14 LEDs
Buttons
Keyboard
KC0 ~ 7
Main
Volume
AVCC AVDD AVFF VDD
+15V +5V –15V +5V
Power Switch
Power Transformer
T101
Reset IC
MB3771PF
IC5
RST
MUTE
BRILLIANCE
M-IN M-OUT
PB4 ~ 6
Filter
LINE IN
Tweeter Tweeter
HEADPHONE
SPSP
LINE OUT
P70 ~
P77
P12 ~
P14
NJM78M15FA
NJM78L05A
NJM7805FA
IC401,403,404
A0 ~ 14
A0 ~ 19
Voltage selector

— 3 —
PCB LAYOUT
PCB JCM434- Components
Main PCB MA1M CPU, DSP, Sound Source ROM Working storage RAM,
Effect RAM Reset IC, DAC, Filter, Key con-troller, Power
amp, Power supply circuit
Jack PCBs PS2M LINE IN/OUT jack, MIDI jacks
PS3M Phone jacks
PS4M Power indicator
Console PCBs CN1M Gate array (Button controller/LED driver), LEDs, Buttons
CN2M Main Volume, Brilliance volume, LEDS, Buttons
Power PCB PS11 Fuse, Noise filter
LIGHT
MIDDLE
HEAVY
HARPSICHORD
POWER
ON
OFF
VOLUME
BRILLIANCE
CONTROL
CONTROL MIDI
MAX
E TRANSPOSE
E TUNE
E MIDI
E BRILLIANCE
E METRONOME VOL
MELLOW BRIGHT
PLAY/STOP PART
TRACK
LR
RECORD
DEMO
SONG LESSON/MEMORY
ROOM
STAGE
HALL 1
HALL2
CHORUS
TREMOLO
CHORUS/TREMOLO PIPE ORGAN STRINGS VIBRAHONE CHOIR
TONE
W. BASS
LOWER TONE
E. BASS TOUCH SELECT
MALTI FUNCTION DISPLAY
VALUE
TEMPO/BEAT/
FIXED PHRASE REPEATPHRASE REPEAT NEXTMETRONOMEREVERB
PIANO 1 PIANO 2 E.PIANO
MIN
SONG
AB
PS11 PS2M MA1M
CN1M
CN2M
PS3M
PS4M
KY3M
KY2MKY1M

— 4 —
DISASSEMBLY INSTRUCTIONS
1. Disassembling top board
1-1. Remove 8 screws on the rear.
1-2. Slide the top board towards the rear.
The top board will be free from catches on the case.
1-3. Lift the top board.
2. Disassembling keyboard cover
2-1. Slide the keyboard cover to open fully.
2-2. Passing the gear into the opening on each rack, lift the
keyboard cover.

— 5 —
3. Disassembling console panel
Note: To avoid scratch on the side board, put paper between the console panel and the side board at both
ends.
3-1. Remove three screws afixing the console panel.
3-2. Remove the screw fixing a grounding wire at the transformer.
3-3. Disconnect two connectors CF on PCB JCM434-PS2M and CD on PCB JCM434-MA1M
3-4. Slide the console panel towards the front to free from catches.
3-5. Turn round the console panel.
3-6. Remove the 2 screws fixing the power switch.
Insert paper here. Insert paper here.

— 6 —
5. Removal of keyboard unit
5-1. Disconnect connector CA on the PCB MA1M.
5-2.Remove 24 screws that affix the keyboard unit
(16 on the bottom of the case and 8 on the
keyboard unit).
5-3.Lift and remove the keyboard unit.
4. Disassembling front cover
4-1. Remove 9 screws at the front edge on the bottom.
4-2. Unscrew 2 screws and remove JCM434-PS4M
Front cover screws
Bottom
Keyboard screws
Keyboard screws
Connector (CA)

— 7 —
6. Removal of keys
6-1. While plying the side partition plastics with tweezers, push
the edge of the key toward front.
7. Disassembling keyboard PCBs
7-1. Turn round the keyboard unit to face the PCB up.
7-2. Disconnect the connector at the middle of keyboard.
7-3. Remove screws on the keyboard PCBs.
8. Replacing the main PCB
Note: The main PCB contains a lithium battery for memory back-up.Please remove the jumper before replacing
the PCB.And make sure that the jumper is reset on new main PCB after replacing the PCB.Because no
jumper is set on a spare part of the main PCB.
Lithium battery
Jumper

— 8 —
CIRCUIT DESCRIPTION
KEYMATRIX
KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7
FI0 A0 1 A0 # 1 B0 1 C1 1 C1 # 1 D1 1 D1 # 1 E1 1
SI0 A0 2 A0 # 2 B0 2 C1 2 C1 # 2 D1 2 D1 # 2 E1 2
EI1 F1 1 F1 # 1 G1 1 G1 # 1 A1 1 A1 # 1 B1 1 C2 1
SI1 F1 2 F1 # 2 G1 2 G1 # 2 A1 2 A1 # 2 B1 2 C2 2
FI2 C2 # 1D2 1 D2 # 1 E2 1 F2 1 F2 # 1 G2 1 G2 # 1
SI2 C2 # 2 D2 2 D2 # 2 E2 2 F2 2 F2 # 2 G2 2 G2 # 2
FI3 A2 1A2 # 1 B2 1 C3 1 C3 # 1 D3 1 D3 # 1 E3 1
SI3 A2 2A2 # 2 B2 2 C3 2 C3 # 2 D3 2 D3 # 2 E3 2
FI4 F3 1F3 # 1 G3 1 G3 # 1 A3 1 A3 # 1 B3 1 C4 1
SI4 F3 2F3 # 2 G3 2 G3 # 2 A3 2 A3 # 2 B3 2 C4 2
FI5 C4 # 1D4 1 D4 # 1 E4 1 F4 1 F4 # 1 G4 1 G4 # 1
SI5 C4 # 2D4 2 D4 # 2 E4 2 F4 2 F4 # 2 G4 2 G4 # 2
FI6 A4 1A4 # 1 B4 1 C5 1 C5 # 1 D5 1 D5 # 1 E5 1
SI6 A4 2A4 # 2 B4 2 C5 2 C5 # 2 D5 2 D5 # 2 E5 2
FI7 F5 1F5 # 1 G5 1 G5 # 1 A5 1 A5 # 1 B5 1 C6 1
SI7 F5 2F5 # 2 G5 2 G5 # 2 A5 2 A5 # 2 B5 2 C6 2
FI8 C6 # 1D6 1 D6 # 1 E6 1 F6 1 F6 # 1 G6 1 G6 # 1
SI8 C6 # 2D6 2 D6 # 2 E6 2 F6 2 F6 # 2 G6 2 G6 # 2
FI9 A6 1A6 # 1 B6 1 C7 1 C7 # 1 D7 1 D7 # 1 E7 1
SI9 A6 2A6 # 2 B6 2 C7 2 C7 # 2 D7 2 D7 # 2 E7 2
FI10 F7 1F7 # 1 G7 1 G7 # 1 A7 1 A7 # 1 B7 1 C8 1
SI10 F7 2F7 # 2 G7 2 G7 # 2 A7 2 A7 # 2 B7 2 C8 2
LSI
HG52E35P
Second contact First contact
KC
SI
FI

— 9 —
BUTTON MATRIX
POWER SUPPLY CIRCUIT
The power supply circuit generates four voltages as shown in the following table.
KI0 KI1 KI2 KI3
L18 STEP BY STEP PART L PART R NEXT
L19 TOUCH SELECT TRACK A TRACK B PLAY/STOP
L20 TEMPO/BEAT/FIXED METRONOME
L24 PIANO 2 E. PIANO HARPSICHORD W.BASS
L25 PIANO 1 STRINGS CHOIR E.BASS
L26 VIBRAPHONE PIPEORGAN CHORUS/TREMOLO REVERB
L27 SONG SELECT RECORD
L28 VALUE DOWN VALUE UP DEMO
Name Voltage For operation of
VDD +5 V CPU, Reset IC, Working storage RAM, DSP, Key touch LSI, Sound source
ROM, Effect RAM, Gate array
AVDD +5 V DAC
AVCC +15 V Filter, Mixer
AVFF –15 V Filter, Mixer

— 10 —
MAJOR WAVEFORMS
1Filter output L-ch CF connector pin 4
2Filter output R-ch CF connector pin 5
Tone : Piano 1
Key : A4
3Key scan signal KC0 CA connector pin 20
4Key scan signal KC1 CA connector pin 19
5Key scan signal KC2 CA connector pin 18
6Button scan signal L24 UPD65005GF-419 pin 53
7Button scan signal L25 UPD65005GF-419 pin 54
8Button scan signal L26 UPD65005GF-419 pin 55
CH1 .2V CH2 .2V
˜˜
A 1ms
CH1
CH2
1
2
CH1 5V CH2 5V
˜CH3 5V
A 20 µs
CH1
CH2
3
5
4
CH3
CH1 5V CH2 5V
A 2ms
CH1
CH2
6
7
CH2 5V
CH3
8

— 11 —
PRINTED CIRCUIT BOARD
JCM435-MAIN
TopView
BottomView

— 12 —
TROUBLESHOOTING
1. No power
Check fuse F101.
Is F101 blown up?
Check fuses F402, F403, and F404.
Are the fuses blown up?
Are the voltages 40 V AC
and 8 V AC?
Is it OK?
Is it OK?
Measure output voltages of
the transformer.
Replace the transformer.
No
No
Replace F402, F403, and F404.
Yes
Yes
No
No
Yes
Yes
Yes
Replace main PCB. No
Replace the power switch.
Set the voltage selector at
proper position.
Check position of voltage
selector.
Check the power switch.
Replace F401.

— 13 —
2. No sound
3. Distorted sound
Does the power indicator
light up?
Check the main volume.
Is it OK?
Does the demo tune sound?
Replace keyboard PCBs.
Disconnect CA and CB
connectors on the main PCB.
Follow "No power"
troubleshooting.
No
Yes
Yes
Yes
No
No
Replace main volume.
Press Demo button.
Replace the main PCB.
Check the voltage selector.
Is it at proper position? No
Yes
Replace the main PCB.
Set the voltage selector at
proper position.

— 14 —
4. Certain keys do not function
5. A certain key does not function
Replace the main PCB.
Do the keys function? Yes
No
Replace keyboard PCBs. End
Clean the contact.
Does the key function?
Does the key function?
Yes
No
No
Replace the key contact rubber.
Replace keyboard PCBs.
End
Yes
Does the key function?
Replace the main PCB.
Yes
No

— 15 —
6. A certain button does not function
7. A certain tone is strange when record/playback
Replace the console PCBs.
Does the button function? Yes
No
Replace MA1M PCB. End
Check the cord of pedal unit
Is it disconnected? Yes
No
Replace the main PCB. Connect the cord

— 16 —
WIRING DIAGRAM
JCM434-CN1M JCM434-CN2M
JCM434-PS3M
PHONE
JCM435-MA1M
CR-BK CR-R CN-W CN-BK
RSP+
RSP–
RT+
RT–
CL-R CL-BK CM-W CM-BK
LSP+
LSP–
LT+
LT–
JCM434-PS2M
LINE IN LINE OUT MIDI
S4
S3
S
2
C
S1
O
O
W
W
BK
O
O
W
W
BK
DG
VDD
RESET
P93
P94
P90
P14
P13
P12
P73
P72
P71
P70
VDDT
PB7
CD-1
CD-2
CD-3
CD-4
CD-5
CD-6
CD-7
CD-8
CD-9
CD-10
CD-11
CD-12
CD-13
CD-14
CD-15
CD-1
CD-2
CD-3
CD-4
CD-5
CD-6
CD-7
CD-8
CD-9
CD-10
CD-11
CD-12
CD-13
CD-14
CD-15
LK14
LK13
LK12
LK11
Lg
Lf
Le
Ld
Lc
Lb
La
JK-1
JK-2
JK-3
JK-4
JK-5
JK-6
JK-7
JK-8
JK-9
JK-10
JK-11
JK-1
JK-2
JK-3
JK-4
JK-5
JK-6
JK-7
JK-8
JK-9
JK-10
JK-11
DGT
PB7
VDDT
KI3
KI2
KI1
KI0
L26
L25
L24
L20
L19
JJ-1
JJ-2
JJ-3
JJ-4
JJ-5
JJ-6
JJ-7
JJ-8
JJ-9
JJ-10
JJ-11
JJ-12
JJ-1
JJ-2
JJ-3
JJ-4
JJ-5
JJ-6
JJ-7
JJ-8
JJ-9
JJ-10
JJ-11
JJ-12
R-mel1 R-mel2
L-mel1 L-mel2
AG
AVDD
VDD
DG
MUTE
M-IN
M-OUT
CC-1 CC-2 CC-3 CC-4 CC-5 CC-6 CC-7 CC-8 CC-9 CC-10 CC-11
CC-1 CC-2 CC-3 CC-4 CC-5 CC-6 CC-7 CC-8 CC-9 CC-10 CC-11
FG
CC-11 CC-11
CF-1
CF-2
CF-3
CF-4
CF-5
R-mel IN
L-mel IN
AG
L-mel OUT
R-mel OUT
CF-1 CF-2 CF-3 CF-4 CF-5
CG-1 CG-2 CG-3 CG-4 CG-5 CG-6 CG-7
CG-1 CG-2 CG-3 CG-4 CG-5 CG-6 CG-7
LVD
DG
AG
LSP
RSP
R-HP
L-HP
POWER Lamp
R OUTINLRL
JCM434-PS4M
CH-1
CH-2 CH-1 CH-2
LVD
DG
POWER
TRANSFORMER
W
R
JCM434-PS11
POWER
Switch
AC PLUG BL
GY
PP Y BR
PP Y BR
JCM887T-KY1M JCM887T-KY2M JCM887T-KY3M
JX-1 JX-2 JX-3 JX-4 JX-5 JX-6 JX-7 JX-8 JX-9 JX-10 JX-11 JX-12 JX-13 JX-14 JX-15 JX-16 JX-16 JX-15 JX-14 JX-13 JX-12 JX-11 JX-10 JX-9 JX-8 JX-7 JX-6 JX-5 JX-4 JX-3 JX-2 JX-1 JY-1 JY-2 JY-3 JY-4 JY-5 JY-6 JY-7 JY-8 JY-9 JY-10 JY-11 JY-12 JY-13 JY-14 JY-15 JY-16 JY-16 JY-15 JY-14 JY-13 JY-12 JY-11 JY-10 JY-9 JY-8 JY-7 JY-6 JY-5 JY-4 JY-3 JY-2 JY-1
KC7
KC6
KC5
KC4
KC3
KC2
KC1
KC0
SI3
FI3
SI2
FI2
SI1
FI1
SI0
FI0
KC0
KC1
KC2
KC3
KC4
KC5
KC6
KC7
SI7
FI7
SI8
FI8
SI9
FI9
SI10
FI10
CA1 CA2 CA3 CA4 CA5 CA6 CA7 CA8 CA9 CA10 CA11 CA12 CA13 CA14 CA15 CA16 CA17 CA18 CA19 CA20 CA21 CA22 CA23 CA24 CA25 CA26 CA27 CA28 CA29 CA30
CA1 CA2 CA3 CA4 CA5 CA6 CA7 CA8 CA9 CA10 CA11 CA12 CA13 CA14 CA15 CA16 CA17 CA18 CA19 CA20 CA21 CA22 CA23 CA24 CA25 CA26 CA27 CA28 CA29 CA30
FI10
SI10
FI9
SI9
FI8
SI8
FI7
SI7
FI6
SI6
FI5
SI5
KC7 KC6 KC5 KC4 KC3 KC2 KC1 KC0
SI4
FI4
SI3
FI3
SI2
FI2
SI1
FI1
SI0
FI0
PEDAL
UNIT
CE1
CE2
CE3
CE4
CE1 CE2 CE3 CE4
SOFT
SOST
DAMPER
VDDT

— 17 —
33
R-4
R-3 37 R-2
38
36
35
31
32
2
34
1
38
9
7
6
10
911
8
5
4
38
R-6
R-1
R-5
13 14 15 16
17 18
19 20
21
22
23
24
27
25
26
29
30
28
12
EXPLODEDVIEW
CABINET

— 18 —
STAND
40
39
R-9
R-8R-7