Casio Celviano AP-25 User manual

AP-25/28
ELECTRONIC KEYBOARD
AP-25/28
APR. 2001

— 1 —
CONTENTS
Safety Notice...................................................................................... 1
Specifications .................................................................................... 2
Block Diagram ................................................................................... 3
Replacement of the Keyboard.......................................................... 4
Circuit Description ............................................................................ 6
Exploded View ................................................................................... 7
Parts List ............................................................................................ 9
Schematic Diagrams ....................................................................... 13
SAFETY NOTICE
CAUTION!
Danger of explosion if battery is incorrectly replaced.
Replace only with the same of equivalent type recommended
by the appliance manufacturer.Discard used batteries
according to manufacturer's instructions.

— 2 —
SPECIFICATIONS
GENERAL
Models: AP-25/AP-25V/AP-28/AP-28V
Keyboard: 88 piano keys (with touch response)
Polyphony: 64 notes, maximum
Tones: 8
Digital Effects: Reverb (4 types), Chorus
Demo Tunes: • Number of Tunes: 8
• Playback: Repeat (all tunes, one tune)
Memory: • Operations: Real-time recording, playback
• Capacity: Approximately 2,500 notes (one song)
• Memory Backup: Built-in lithium battery (Battery Life: 5 years)
Pedals: AP-25/AP-25V: Damper, Soft/Sostenuto (Selectable)
AP-28/AP-28V: Damper, Soft, Sostenuto
Other Functions: • Metronome: Beat (6 types), Tempo ( = 30 to 255)
• Touch Select: 3 types, off
• Transpose: 1 octave (F# to C to F)
• Tuning: A4 = 440Hz ±50 cents (adjustable)
MIDI: 16 multi-timbre receive
Input/Output: • Headphones: Stereo standard jacks ×2
Output Impedance: 470Ω
Output Voltage: 18V (RMS) MAX
• MIDI (OUT) (IN)
Speakers: ø 12cm ×2 (Output: 20 W + 20 W)
Power Supply: AP-25/AP-28: 120V
AP-25V/AP-28V: 220-240V
Power Consumption: AP-25/AP-28: 60W
AP-25V/AP-28V: 60W
Dimensions: • CELVIANO (without stand): 137.0 ×42.5 ×19.0 cm (53 15/16 ×16 3/4×7 1/2inch)
• CELVIANO: 139.0 ×47.0 ×81.0 cm (54 3/4×18 1/2×31 7/8inch)
Weight: • CELVIANO (without stand): approximately 34 kg (74.8 lbs)
• CELVIANO: approximately 44 kg (96.8 lbs) (AP-25/AP-25V)
approximately 44 kg (96.8 lbs) (AP-28/AP-28V)
• Design and specifications are subject to change without notice.
• AP-25 and AP-28 have hardwired power cords.
• AP-25V and AP-28V have detachable power cords.

— 3 —
BLOCK DIAGRAM
FI0 ~ 10
SI0 ~ 10
CPU
uPD703107AGJ103UEN
LSI 6
PEDAL
MIDI
IN OUT
ROM (4MB)
MR27V3202E-81MA
LSI2
Keyboard
Controller
TC190C020AF
LSI 1
EA0 ~ 15
MA0 ~ 20
MD0 ~ 15
ED4 ~ 19
Keyboard
KC0 ~ 7
M-IN M-OUT ANI0 ~ 2
DSP
uPD914AGM-3ED
LSI 3
RAM (128KB)
CY62126BVLL-55ZI
LSI4
RAM (128KB)
CY62126BVLL-55ZI
LSI5
CA1 ~ 16
CA1 ~ 5
CA1 ~ 4
3VD0 ~ 15
3VD0 ~ 15
3VD0 ~ 15
Power Switch
Power
Transformer
T101
Voltage
Selector
AVCC
VDD
+15V
+5V
Power Supply
IC401: NJM78M05FA
IC402: NJM78M15FA
Reset IC
RN5VD2BAA
IC 13
D/A Converter
PCM69BU/2K
IC 2
SYCK
BCK
WCK
Mute
Power Amp.
LM4765T
IC403
Main
Volume
Filter
IC1, IC405, IC406
HEADPHONE
SPSP

— 4 —
REPLACEMENT OF THE KEYBOARD
1) Replacement of the white key / black key
2) Replacement of the hammer
3) Replacement of the contact rubber
4) Other precauions
When the the keyboard needs to be replaced, make sure to check the key touch before replacing it.
1) Replacement of the White key / Black key
1. Expand the rear end of the white key/black key by a pair of
tweesers and slide it forward horizontally.
2. Apply proper amount of grease to the inside of the Guide and
the front end of the key as well as the rear end of the key.
* Take extra care of the quantity of the grease, which can easily
change the key touch.
* It is recommended to refer to the quantity of the grease which
is applied to the neighboring keys.
3. After replacing the key, put the front end of the key back into the
Guide and slide it backward horizontally.
* Take extra care not to make any scratches in the inside of the
front end of the key and the Guide.
2) Replacement of the Hammer
1. If no jig is available when disassembling, use a driver and a big clip. Then,
lift the hammer up and remove it like a lever.
2. Apply the grease (G501) thinly to the top and bottom of the front end as
well as the fulcrum of the hammer.
* It is recommended to refer to the quantity of the grease which is applied
to the other hammers when disassembling.
Guide
White key
Grease
Clip
Driver
Grease

— 5 —
Jig (lumber)
10 mm ×10 mm
Guide
White key
Screw
Contact rubber
PCB
100 g
105 g
3) Replacement of the contact rubber. (A Jig is necessary)
Since the contact rubber is replaced with the keyboard (both
white keys and black keys) turned upside down, a jig is necessary
to prevent from various troubles caused by the fact that the keys
are pushed down.
Precautions when replacing the contact rubber
1. Make sure that the keys are NOT pushed down.
2. Make sure that the contact rubber is attached to the frame in the right
position.
3. When assembling, take extra care that the contact rubber can often
be slipped or twisted at the ends of the rubber itself and the PCB.
4. Make sure that the screw is fixed vertically to the PCB since the key
PCB is fixed at an angle (see the right figure).
5. The key touch may change if the above precauions are not followed.
4) Other precautions
Initial load inspection of the keyboard
1. Check if the keys go down with the load put on them (100g for the white key and 105g for the black key).
Maintenance of the keyboard unit
1. Never keep the keyboard unit upside down, since the contact rubber may
be stuck to the PCB.

— 6 —
CIRCUIT DESCRIPTION
KEY MATRIX
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 # 1 D2 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 1 A2 # 1 B2 1 C3 1 C3 # 1 D3 1 D3 # 1 E3 1
SI3 A2 2 A2 # 2 B2 2 C3 2 C3 # 2 D3 2 D3 # 2 E3 2
FI4 F3 1 F3 # 1 G3 1 G3 # 1 A3 1 A3 # 1 B3 1 C4 1
SI4 F3 2 F3 # 2 G3 2 G3 # 2 A3 2 A3 # 2 B3 2 C4 2
FI5 C4 # 1 D4 1 D4 # 1 E4 1 F4 1 F4 # 1 G4 1 G4 # 1
SI5 C4 # 2 D4 2 D4 # 2 E4 2 F4 2 F4 # 2 G4 2 G4 # 2
FI6 A4 1 A4 # 1 B4 1 C5 1 C5 # 1 D5 1 D5 # 1 E5 1
SI6 A4 2 A4 # 2 B4 2 C5 2 C5 # 2 D5 2 D5 # 2 E5 2
FI7 F5 1 F5 # 1 G5 1 G5 # 1 A5 1 A5 # 1 B5 1 C6 1
SI7 F5 2 F5 # 2 G5 2 G5 # 2 A5 2 A5 # 2 B5 2 C6 2
FI8 C6 # 1 D6 1 D6 # 1 E6 1 F6 1 F6 # 1 G6 1 G6 # 1
SI8 C6 # 2 D6 2 D6 # 2 E6 2 F6 2 F6 # 2 G6 2 G6 # 2
FI9 A6 1 A6 # 1 B6 1 C7 1 C7 # 1 D7 1 D7 # 1 E7 1
SI9 A6 2 A6 # 2 B6 2 C7 2 C7 # 2 D7 2 D7 # 2 E7 2
FI10 F7 1 F7 # 1 G7 1 G7 # 1 A7 1 A7 # 1 B7 1 C8 1
SI10 F7 2 F7 # 2 G7 2 G7 # 2 A7 2 A7 # 2 B7 2 C8 2
FI
KC
SI
LSI
HG52E35P
Second contact First contact
1
2

— 7 —
EXPLODED VIEW
CABINET
1
14
26
27
2
3
8
9
9
16
28
10
24 11 17
23
4
13 12
7
6
5
40
41
42
15
18 19 2021
22
25
37
39
39
43
46
44
36
47
45
38

— 8 —
STAND
x2
x2
x4
x2
x1
x14
x2
x2
34
32 33 35
29 30 31

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 with-
out 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.
PARTS LIST
AP-25/28

AP-25, AP-28 PARTS PRICE LIST
Item Code No. Part Name Specification QPrice Code RRemarks
Main PCB
11005 2246 PCB ASSY/M427-MA1M TK-M241553*1(M427) 1
EFA
BT1 3815 0679 BATTERY/LITHIUM CR2032/1HF1 1
AGB
IC1 2114 1218 IC/MONOLITHIC NJM2068MD(T1) 1
ADB
IC10 2105 5824 IC/L-MOS TC7SH32FU(TE85L) 1
AB B
IC11 2105 3773 IC/L-MOS TC7SH08FU(TE85L) 1
AB B
IC12 2105 3696 IC/L-MOS TC7SH04FU(TE85L) 1
AB B
IC13 1004 7449 IC/MOS RN5VD28AA-TR 1
ACB
IC14 2105 5712 IC/L-MOS TC7S04FU(TE85L) 1
AB B
IC2 1000 8350 LSI PCM69BU/2K 1
BA A
IC3 1002 1416 IC/MOS RN5RF35BA-TR 1
AE B
IC4,IC9 2105 6389 IC/L-MOS TC7SET04FU(TE85L) 2
ADB
IC5 2105 6083 IC/L-MOS TC7WU04FU(TE12L) 1
ADB
IC6 2105 6394 IC/L-MOS TC7SET08FU(TE85L) 1
AB B
IC7,IC8 2105 6576 IC/C-MOS TC74LCX245FT(EL) 2
AFB
LSI1 2012 5987 LSI TC190C020AF-001 1
BCA
LSI2 1004 9737 LSI MR27V3202E-81MA-N 1
BTA
LSI3 1005 4502 LSI UPD914AGM-3ED 1
CK A
LSI4 1004 3417 LSI CY62126BVLL-55ZIT 2
BRA
LSI6 1004 9738 LSI UPD703107GJ014-UEN 1
CE A
Q1 2259 2702 TRANSISTOR 2SB1188T100Q 1
AB B
Q2 2253 0715 TRANSISTOR 2SD1664T100R 1
AA B
Q3 2250 1162 TRANSISTOR 2SA1576AT106R 1
AA B
Q4 2250 1605 TRANSISTOR 2SC4081T106S 1
AA B
Q5 2250 1162 TRANSISTOR 2SA1576AT106R 1
AA B
X1 1004 7439 OSCILLATOR/CERAMIC CSTCV16.00MXJ0C4-T 1
ACB
X2 1002 1357 OSCILLATOR/CRYSTAL DSX151GA-22.5792M 1
AS B
X3 1004 7438 OSCILLATOR/CERAMIC CSTCR5M00G35-R0 1
ACB
Power supply PCB
21005 2244
PCB ASSY/M427-PS2M TK-M241554*1(M427) 1CE A 120V area
21005 4065
PCB ASSY/M427-PS2M TK-M241554*2(M427) 1CE A 230V area
D401-D404 1003 6785 DIODE 2A02B 4
AA B
D405-D408 2390 3022 DIODE 3BZ41(LC6-15) 4
ADB
D409-D412,
D414-D415
2315 3132 DIODE 1SS133T-77 6AA B
D413 1003 8115 DIODE/ZENER MTZJT-775.6B 1
AA B
D416 2390 2828 DIODE RB441Q-40T-77 1
AA B
F401 1005 2231 FUSE 51MS010L 1
ACA120V area
F401 1005 4029 FUSE 50T010H 1
ACA230V area
F402,F403 1005 2230 FUSE 51MS040L 2
ACA120V area
F402,F403 1005 4030 FUSE 50T040H 2
ACA230V area
IC401 2114 5796 IC/MONOTITHIC NJM78M05FA 1
AE B
IC402 2114 5794 IC/MONOTITHIC NJM78M15FA 1
AE B
IC403 1004 3418 IC/MONOTITHIC LM4765T 1
BCB
IC404 2114 1421 IC/PHOTO COUPLER PC900V 1
AK B
IC405-IC406 2121 0072 IC/MONOTITHIC NJM2068DD 2
ADB
J401 3501 4816 JACK/DIN YKF51-5051 1
AHB
Q401-Q403•Q405 2250 1627 TRANSISTOR 2SC1740STPS 4
AA B
Notes: Q - Quantity per unit
R - Rank
- 10 -

Item Code No. Part Name Specification QPrice Code RREMARKS
PS12,PS3,PS4M PCB's
31005 4068
PCB ASSY/M437-PS1 TK-M341450*2(M427) 1CLB120V area
31005 4069
PCB ASSY/M437-PS1 TK-M341450*3(M427) 1CLB230V area
41005 2252 SWITCH ASSY/POWER TK-M341447*1(M427) 1
AY C
51005 2253 PCB ASSY/M427-PS3M TK-M341444*1(M427) 1
CE B
61005 2251 PCB ASSY/M427-PS4M TK-M341445*1(M427) 1
CE B
71005 2248 PCB ASSY/M427-PS5M TK-M341446*1(M427) 1
CE B
F400 1004 7508 FUSE 50T025H 1
ACA230V area
F400 1004 7399 FUSE 51MS032L 1
ACA120V area
J402,J403 1004 7514 JACK/PHONE YKB22-5078 2
AGA
1005 2243 PCB ASSY/FRONT BOARD TK-M241577*1(M427) 1
CE B
Other electrical parts
81005 4031
TRANSFORMER TE-427-1M1 1CWB120V area
81005 4032
TRANSFORMER TE-427-2M1 1CWB230V area
91005 2227 SPEAKER S12J99A 2
CD C
1004 7593 2P-CONNECTOR-M437NW EH-2P-45-M437 2
AB C
1005 2225 CORE/FERRITE TFCK-16-8-13 2
AQC
1005 2224 CORE/FERRITE TFCK-23-11-14 1
AR C
Keyboard unit
10 1004 6083 KEY ASSY M141175*1 TK(MLMP2) 1
EMB
11 6927 4030 BLACK KEY M140784-1 36
AGA
12 1005 2300 HAMMER ASSY/BLACK KEY (R) M341438*1 TK(MLMP) 9
BHB
12 1005 2301 HAMMER ASSY/BLACK KEY (G) M341439*1 TK(MLMP) 9
BHB
12 1005 2309 HAMMER ASSY/BLACK KEY (BK) M341440*1 TK(MLMP) 9
BHB
12 1005 2310 HAMMER ASSY/BLACK KEY (BL) M341441*1 TK(MLMP) 9
BHB
13 1005 2296 HAMMER ASSY/WHITE KEY (R) M341434*1 TK(MLMP) 13
BHB
13 1005 2297 HAMMER ASSY/WHITE KEY (G) M341435*1 TK(MLMP) 13
BHB
13 1005 2298 HAMMER ASSY/WHITE KEY (BK) M341436*1 TK(MLMP) 13
BHB
13 1005 2299 HAMMER ASSY/WHITE KEY (BL) M341437*1 TK(MLMP) 13
BHB
14 6928 4470 RUBBER/CONTACT M240957-2 1
AE A
15 6928 4480 RUBBER/CONTACT M240958-2 6
AHA
16 6928 4490 RUBBER/CONTACT M240959-2 1
AHA
17 6927 4090 WHITE KEY/A M140789-1 7
AHA
18 6927 4100 WHITE KEY/B M140790-1 8
AIA
19 6927 4040 WHITE KEY/C M140783-1 7
AHA
20 6927 4050 WHITE KEY/D M140785-1 7
AIA
21 6927 4060 WHITE KEY/E M140786-1 7
AHA
22 6927 4070 WHITE KEY/F M140787-1 7
AIA
23 6927 4080 WHITE KEY/G M140788-1 7
AHA
24 6927 4110 WHITE KEY/SA M140792-1 1
AMA
25 6927 4120 WHITE KEY/SC M140791-1 1
ANA
26 6928 5460 PCB ASSY M887T-KY1M M240951A*1 1
BOC
27 6928 5470 PCB ASSY M887T-KY2M M240952A*1 1
BTC
28 6928 5480 PCB ASSY M887T-KY3M M241019A*1 1
BMC
6927 4011 CAP/GUIDE/WHITE KEY M340958A-1 13
AE C
6927 4020 CAP/GUIDE/BLACK KEY M340959-1 36
AA C
1005 4481 CHASSIS SUB ASSY M140831E*1 1
CVC
Notes: Q - Quantity per unit
R - Rank
- 11 -

Item Code No. Part Name Specification QPrice Code RREMARKS
Stand
29 1005 2239 FOOT SUB ASSY M341409A*1(M427) 1
CTCLeft
30 1005 2238 FOOT SUB ASSY M341409A*2(M427) 1
CTCRight
31 1005 2237
PEDAL-SUB ASSY M241584A*1(M427) 1CPCAP-28/3 Pedal
31 1005 4064 PEDAL-SUB ASSY M241584A*2(M427) 1
CPCAP-25/2 Pedal
32 1005 2236 ST-SIDE SUB ASSY M341472*1(M427) 1
CVCLeft
33 1005 2235 ST-SIDE SUB ASSY M341472*2(M427) 1
CVCRight
34 1005 2221 SCREW SET M241589-1 1
BNX
35 1005 2220 BT-BACK-427 M2411392-1 1
CE X
AC cord
36
1005 4071 AC-CORD-ASSY TK-M341449*2 1AWC120V area
36 1005 4067 INLET ASSY/2P-AC TK-M341448*1(M437) 1
ATC230V area
1004 5709 CORD SET UC2NC-M001A 1
AK CUSA, Canada
1004 5706 CORD-SET EC2NC-M001A 1
AMCEurope
1004 5707 CORD-SET BC2NC-M001A 1
BD C UK
Other parts
37 1005 2240 COVER ASSY/KEY TK-M241573*1(M427) 1
COX
38 1004 5692 SHAFT M441204-1 1
BIC
39 6924 5140 GEAR 4247002100 2
AC C
40 1005 2232 KNOB/VOLUME M341402-1 1
AE C
41 1004 7851 BUTTON/RUBBER M241515-1 1
AC C
42 6924 5260 BUTTON/POWER M340318-1 1
AA C
43 1005 2241 BOARD ASSY/TOP TK-M241574*1(M427) 1
DE X
44 1001 4480 STOPPER M440862A-1 1
AA C
45 1005 2234 STAND ASSY/MUSIC TK-M241576*1(M427) 1
CH X
45 1005 4066 STAND ASSY/MUSIC TK-M241576*2(M427) 1CV X AP-25 USA,
Canada
46 1005 2242 PANEL ASSY/CN TK-M341456*1(M427) 1
ARXAP-25
46 1005 4070 PANEL ASSY/CN TK-M341456*2(M427) 1
AIXAP-28
47 1005 2243 PCB ASSY/FRONT BOARD TK-M241577*1(M427) 1
CE B
Notes: Q - Quantity per unit
R - Rank
- 12 -

— 13 —
SCHEMATIC DIAGRAMS
MAIN PCB JCM427-MA1M

— 14 —
I/O and POWER SUPPLY(120 V) PCB JCM427-PS1/PS2M/PS3M/PS4M/PS5M

— 15 —
I/O and POWER SUPPLY(230 V) PCB JCM427-PS1/PS2M/PS3M/PS4M/PS5M

— 16 —
KEYBOARD PCB JCM887T-KT1M

— 17 —
KEYBOARD PCB JCM887T-KT2M

— 18 —
KEYBOARD PCB JCM887T-KT3M

CASIO TECHNO CO.,LTD.
Overseas Service Division
Nishi-Shinjuku Kimuraya Bldg. 1F
5-25, Nishi-Shinjuku 7-Chome
Shinjuku-ku, Tokyo 160-0023, Japan