Casio Celviano AP-22S User manual

ELECTRONIC KEYBOARD
AP-22S

— 2 —
CONTENTS
Safety Notice...................................................................................... 2
Specifications .................................................................................... 4
Block Diagram ................................................................................... 5
PCB Layout ........................................................................................ 6
Disassembly Instructions ................................................................. 7
Circuit Description .......................................................................... 11
Major Waveforms............................................................................. 13
Printed Circuit Board ...................................................................... 14
Troubleshooting .............................................................................. 15
Wiring Diagram ................................................................................ 19
Exploded View ................................................................................. 20
Parts List .......................................................................................... 23
Schematic Diagrams ....................................................................... 25
SAFETY NOTICE
CAUTION!
Danger of explosion if battery is incorrectly replaced. Replace
only with the same or equivalent type.

— 3 —
DENMARK:
FINLAND:
SWEDEN:
VAROITUS
Paristo voiäjähtää, jos se on virheellisesti asennettu. Vaihda
paristo ainoastaan valmistajan suosittelemaan tyyppiin. Hävitä
käytetty paristo valmistajan ohjeiden mukaisesti.
VARNING
Felaktigt batteribyte kan medf fara för explosion. Använd där-
för endast samma typ eller likvärdig typ enligt apparat-
tillverkarens rekommendation.
Kassera förbrukade batterier enligt tillverkarens anvisning.
ADVARSE!
Lithiumbatteri. Eksplosionsfare ved fejlagtig handtering.
Udskiftning ma kun ske med batteri af samme fabrikat og type.
Lever det brugte batteri tilbage tili leverandoren.

— 4 —
SPECIFICATIONS
GENERAL
Keyboard: 88 piano keys (with touch response)
Polyphony: 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 (TrackA, 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 (q= 30 to 300)
• Touch Select: 3types
• Transpose: 1 octave (F#to C TO F)
• Tuning: A4 + 440 Hz ±13 Hz (adjustable)
• Temperament: 7 types
• Baroque pitch
MIDI: 16 multi-timbre receive
Input/Output: • Headphones: Standard stereo jacks ×2
• LINE OUT (R)(L): Standard stereo jacks ×2
Output impedance 22 KΩ
Output voltage: 2.0 V (RMS) MAX
• LINE IN (R)(L): Standard stereo jacks ×2
Input impedance: 30 KΩ
Input voltage 200 mV
• MIDI (OUT)(IN)
Speakers: ø 16 cm ×2, ø 5 cm x 2 (Output: 30 W + 30 W)
Power Supply: 120 V (for U.S.A.), 120 V, 220 V, 230 V and 240 V (for other countries) AC
household current viaAC power cord supplied with piano.
Power Consumption: 70 W (with 120 VAC), 90 W (with 220 V, 230 V and 240AC)
Dimensions: • CELVIANO Only: 139 ×54 ×25 cm (5.5 ×2.1 ×1.0 inch)
• CELVIANO and Stand: 139 ×54 ×88 cm (5.5 ×2.1 ×3.5 inch)
Weight: • CELVIANO Only: approximately 48.5 kg (106.9 lbs)
• CELVIANO and Stand: approximately 60.2 kg (132.7 lbs)
Accessories: Stand with three pedals, score book, power cord

— 5 —
BLOCK DIAGRAM
SOLM, SOLP
BDK, WOK1, SORM, SORP
FI0 ~ 10
SI0 ~ 10
DSP
HG51B155FD
RAM
256K
TC55257DFL-
70L
ROM
8M
MX23C8000MC-
12CA73
CPU
HD6435328RF35F
PEDAL
MIDI
IN OUT
ROM
24M
MX23C2410MC-
12CA58
RAM
256K ×2
TC55257DFL-
70L ×2
Keyboard
Controller
HG52E35P
Switch & LED
Controller
µPD65005GF-419
D/A Converter
µPD6376GS
D/A Converter
µPD6376GS
Filter
Mixer, Mute Circuit
Power Amp.
STK4132MK
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
RST
MUTE
BRILLIANCE
M-IN M-OUT
PB4 ~ 6
Filter
LINE IN
Tweeter Tweeter
HEADPHONE
SPSP
LINE OUT
P70 ~
P77
P12 ~
P14
NJM78M78M15FA
NJM78L05A
NJM7805FA
A0 ~ 14
A0 ~ 19
Voltage selector

— 6 —
LIGHT
MIDDLE
HEAVY
HARPSICHORD
POWER
ONON
OFFOFF
VOLUME
BRILLIANCE
CONTROLCONTROL
CONTROLCONTROL MIDIMIDI
MAXMAX
E TRANSPOSETRANSPOSE
E TUNETUNE
E MIDIMIDI
E BRILLIANCEBRILLIANCE
E METRONOME VOL
MELLOWMELLOW BRIGHTBRIGHT
PLAY/STOP
PLAY/STOP PART PART
TRACK
TRACK
L
LR R
RECORD
RECORD
DEMO
DEMO
SONG LESSON/MEMORY
SONG LESSON/MEMORY
ROOMROOM
STAGESTAGE
HALL 1HALL 1
HALL2HALL2
CHORUSCHORUS
TREMOLOTREMOLO
CHORUS/TREMOLOCHORUS/TREMOLO PIPE ORGAN
PIPE ORGAN STRINGS STRINGS VIBRAHONE VIBRAHONE CHOIR CHOIR
TONE
TONE
W. BASS
W. BASS
LOWER TONE
LOWER TONE
E. BASS
E. BASS TOUCH SELECT
TOUCH SELECT
MALTI FUNCTION DISPLAYMALTI FUNCTION DISPLAY
VALUE
TEMPO/BEAT/
FIXED PHRASE REPEATPHRASE REPEAT NEXTMETRONOMEREVERB
PIANO 1PIANO 1 PIANO 2PIANO 2 E.PIANO
MIN
MIN
SONG
A B
PS11 PS2M MA1M
CN1M
CN2M
PS3M
PS4M
TP20-KY1M TP20-KY2M
PCB LAYOUT
PCB
Main PCB
Jack PCBs
Console PCBs
Power PCB
JCM434-
MA1M
PS2M
PS3M
PS4M
CN1M
CN2M
PS11
Components
CPU, DSP, Sound Source ROM Working storage
RAM, Effect RAM Reset IC, DAC, Filter, Key con-
troller, Power amp, Power supply circuit
LINE IN/OUT jack, MIDI jacks
Phone jacks
Power indicator
Gate array (Button controller/LED driver), LEDs,
Buttons
Main Volume, Brilliance volume, LEDS, Buttons
Fuse, Noise filter

— 7 —
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.

— 8 —
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.

— 9 —
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
5. Disassembling keyboard unit
5-1. Remove 12 screws fixing front end of the keyboard unit and three screws supporting rear end of
the keyboard.
5-2. Remove 2 connectors CA and CB on PCB JCM434-MA1M.
5-3. Lift up the keyboard unit.

— 10 —
6. Disassembling keys
6-1. Pressing the hook with long-nose pliers, lift the key.
6-2. Using pliers, remove key spring.
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

— 11 —
CIRCUIT DESCRIPTION
KEYMATRIX
FI
KC
SI
LSI
HG52E35P
Second contact First contact
KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7
FI0 A0 1A0 # 1B0 1C1 1C1 # 1D1 1D1 # 1E1 1
SI0 A0 2A0 # 2B0 2C1 2C1 # 2D1 2D1 # 2E1 2
EI1 F1 1F1 # 1G1 1G1 # 1A1 1A1 # 1B1 1C2 1
SI1 F1 2F1 # 2G1 2G1 # 2A1 2A1 # 2B1 2C2 2
FI2 C2 # 1D2 1D2 # 1E2 1F2 1F2 # 1G2 1G2 # 1
SI2 C2 # 2D2 2D2 # 2E2 2F2 2F2 # 2G2 2G2 # 2
FI3 A2 1A2 # 1B2 1C3 1C3 # 1D3 1D3 # 1E3 1
SI3 A2 2A2 # 2B2 2C3 2C3 # 2D3 2D3 # 2E3 2
FI4 F3 1F3 # 1G3 1G3 # 1A3 1A3 # 1B3 1C4 1
SI4 F3 2F3 # 2G3 2G3 # 2A3 2A3 # 2B3 2C4 2
FI5 C4 # 1D4 1D4 # 1E4 1F4 1F4 # 1G4 1G4 # 1
SI5 C4 # 2D4 2D4 # 2E4 2F4 2F4 # 2G4 2G4 # 2
FI6 A4 1A4 # 1B4 1C5 1C5 # 1D5 1D5 # 1E5 1
SI6 A4 2A4 # 2B4 2C5 2C5 # 2D5 2D5 # 2E5 2
FI7 F5 1F5 # 1G5 1G5 # 1A5 1A5 # 1B5 1C6 1
SI7 F5 2F5 # 2G5 2G5 # 2A5 2A5 # 2B5 2C6 2
FI8 C6 # 1D6 1D6 # 1E6 1F6 1F6 # 1G6 1G6 # 1
SI8 C6 # 2D6 2D6 # 2E6 2F6 2F6 # 2G6 2G6 # 2
FI9 A6 1A6 # 1B6 1C7 1C7 # 1D7 1D7 # 1E7 1
SI9 A6 2A6 # 2B6 2C7 2C7 # 2D7 2D7 # 2E7 2
FI10 F7 1F7 # 1G7 1G7 # 1A7 1A7 # 1B7 1C8 1
SI10 F7 2F7 # 2G7 2G7 # 2A7 2A7 # 2B7 2C8 2

— 12 —
KI0 KI1 KI2 KI3
L18 STEP BY STEP PART L PART R NEXT
L19 TOUCH SELECT TRACK A TRACK B PLAY/STOP
L20 METRONOME
L24 PIANO 2 E. PIANO HARPSICHORD W.BASS
L25 PIANO 1 STRINGS CHOIR E.BASS
L26 VIBRAPHONE PIPEORGAN REVERB
L27 SONG SELECT RECORD
L28 VALUE DOWN VALUE UP DEMO
TEMPO/
BEAT/FIXED
CHORUS/
TREMOLO
BUTTON MATRIX
POWER SUPPLY CIRCUIT
The power supply circuit generates four voltages as shown in the following table.
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

— 13 —
MAJOR WAVEFORMS
CH1 .2V CH2 .2V
˜˜
A 1ms
CH1
CH2
1
2
1Filter output L-ch CF connector pin 4
2Filter output R-ch CF connector pin 5
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 5V CH2 5V
A 2ms
CH1
CH2
6
7
CH2 5V
CH3
8
Tone : Piano 1
Key : A4
3Key scan signal KC0 CB connector pin 2
4Key scan signal KC1 CB connector pin 4
5Key scan signal KC2 CB connector pin 6
CH1 5V CH2 5V
˜CH3 5V
A 20 µs
CH1
CH2
3
5
4
CH3

— 14 —
PRINTED CIRCUIT BOARD
Top View
Bottom View
C93
C95
C94
C96
C97
C98
C85
C86
C87
C88
C89
C83
C90

— 15 —
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 F401.
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.

— 16 —
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.

— 17 —
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

— 18 —
6. A certain button does not function
Replace the console PCBs.
Does the button function? Yes
No
Replace MA1M PCB. End
7. A certain tone is strange when record/playback
Check the cord of pedal unit
Is it disconnected? Yes
No
Replace the main PCB. Connect the cord

— 19 —
SI0
KC0
FI0
KC1
SI1
KC2
FI1
KC3
SI2
KC4
FI2
KC5
SI3
KC6
FI3
KC7
SI4
NC
FI4
NC
CA-1
CA-2
CA-3
CA-4
CA-5
CA-6
CA-7
CA-8
CA-9
CA-10
CA-11
CA-12
CA-13
CA-14
CA-15
CA-16
CA-17
CA-18
CA-19
CA-20
CA-1
CA-2
CA-3
CA-4
CA-5
CA-6
CA-7
CA-8
CA-9
CA-10
CA-11
CA-12
CA-13
CA-14
CA-15
CA-16
CA-17
CA-18
CA-19
CA-20
SI5
KC0
FI5
KC1
SI6
KC2
FI6
KC3
SI7
KC4
FI7
KC5
SI8
KC6
FI8
KC7
SI9
FI10
FI9
SI10
CB-1
CB-2
CB-3
CB-4
CB-5
CB-6
CB-7
CB-8
CB-9
CB-10
CB-11
CB-12
CB-13
CB-14
CB-15
CB-16
CB-17
CB-18
CB-19
CB-20
CB-1
CB-2
CB-3
CB-4
CB-5
CB-6
CB-7
CB-8
CB-9
CB-10
CB-11
CB-12
CB-13
CB-14
CB-15
CB-16
CB-17
CB-18
CB-19
CB-20
TP-20
KY1
TP-20
KY2
JCM434-CN1M
JCM434-CN2M
KC7
NC FI4
SI4
1 2 3 4
1 2 3 4
JCM434-PS3M
PHONE
JCM434-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
RLRL IN
OUT
LINE IN LINE OUT MIDI
S4 S3
S
2
C
S1
O O W W BK
O O W W BK
W
R
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
CF-1 CF-2 CF-3 CF-4 CF-5
R-mel IN
L-mel IN
AG
L-mel OUT
R-mel OUT
R-mel IN
L-mel IN
AG
L-mel OUT
R-mel OUT
CF-R
BR
E
O
Y
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
JCM434
-PS4M
CH-1 CH-2 CH-1
CH-2
LVD DG
POWER
TRANSFORMER
JCM434
-PS11 POWER
Switch
AC PLUG BL
GY
PP Y BR
PP Y BR
WIRING DIAGRAM

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