Casio AP245 Service Manual

AP-245

JUL. 2013

Ver. 4 : Nov. 2014

AP-245

CONTENTS

SPECIFICATIONS ........................................................................................... 1

BLOCK AND WIRING DIAGRAM
PCB INFORMATION
CIRCUIT DESCRIPTION
PRINTED CIRCUIT BOARDS
DISASSEMBLY
DIAGNOSTIC PROGRAM
EXPLODED VIEW
PARTS LIST
SCHEMATIC DIAGRAMS

............................................................................................... 9

.................................................................................................. 61

....................................................................................... 3

................................................................................ 4

......................................................................... 6

............................................................................ 47

......................................................................................... 57

............................................................................. 67

.................................................................. 2

AP-245

SPECIFICATIONS

Keyboard 88-key piano keyboard, with Touch Response
Maximum Polyphony 128 notes
Tones 18

• Layer (excluding bass tones)

• Split (Low-range bass tones only)

Effects Brilliance (–3 to 0 to 3), Reverb (4 types), Chorus (4 types), DSP,

Damper Resonance

Metronome • Beats: 0, 2, 3, 4, 5, 6

• Tempo Range: 20 to 255
Duet Adjustable tone range (–1 to 2 octaves)
Music Library • Number of Songs: 60, User Songs: 10 songs (Up to approximately

90 KB per song, approximately 900 KB for 10 songs)*
* Based on 1 KB = 1024 bytes, 1 MB = 10242 bytes

• Song volume: Adjustable

• Part On/Off: L, R
Recorder • Functions: Real-time recording, playback

• Number of Song: 1

• Number of Tracks: 2

• Capacity: Approximately 5,000 notes total

•

RecordedDataProtection:Built-inashmemory

Pedals Damper (with half-pedal operation), soft, sostenuto
Other Functions • Touch Select: 3 types, Off

• Transpose: 2 octaves (–12 to 0 to 12)

• Tuning: A4 = 415.5 Hz to 440.0 Hz to 465.9 Hz (variable)

• Temperament

• Octave shift

• Operation lock

MIDI 16-channel multi-timbre receive
Inputs/Outputs •

Speakers
Power Requirements AC Adaptor: AD-A12150LW

Power Consumption 12 V = 18 W
Dimensions Digital Piano and Stand:

Weight Digital Piano and Stand: approximately 39.5 kg (87.1 lbs)

PHONES jacks: Stereo standard jacks × 2
 Outputimpedance:3Ω
Output Voltage: 1.5 V (RMS) MAX

• Power: 12 V DC

• USB port: TYPE B

• Pedal connector

12 cm × 2 (Output 8 W + 8 W)

φ

• Auto Power Off: Approximately 4 hours after last operation. Auto

Power Off can be disabled.

137.7 (W) × 43.2 (D) × 84.0 (H) cm (54

1

/4 × 17 × 33 1/8 inch)

– 1 –

BLOCK AND WIRING DIAGRAM

KEYBOARD PCB (M920-KYA1) KEYBOARD PCB (M920-KYB1) KEYBOARD PCB (M920-KYC1)

AP-245

MAIN PCB (M920-MDA1)

Power Supply Circuit

IC3, IC4, IC10,

C144~C149,

C152~154, C158

Power Supply Circuit

IC11, C150,

C151, C165

Schmitt

VD5 VA12 VA5 VDP3

VA12 VA5 VDP3 VH5

VD5

Power Supply Circuit

IC2~IC6, C10~C17,

C22~C25, C30~C34, C41~C43,

C45, C46, D10

VCP

DC 12 V
(J2)

Trigger

IC7

APO

CN16 (13 pin)

CN1 (13 pin)

APO

POWER & AMP PCB (M920-PSA1)

VD18
VD1
VD3

VA9

CN801 (17 pin)

Filter
IC14

Electric
Volume

IC13

Preamp

IC12

L R

Headphones

Amplifier

IC7

VD5

CN3 (7 pin)

CN701 (7 pin)

CONSOLE PCB
(M920-HPA1)

CN802 (17 pin)

KI0~KI21, KS0~KS2, KB0~KB3

HPDT, HPMUTE, SPMUTE

L

DAC

IC6

R

Volume Signal

Power

Amplifier

IC1

POWER LAMP
(J702)

PHONES
(J701)

CN803 (30 pin)

CN3 (30 pin)

MPU

IC9

CN6 (2 pin)

CN9 (2 pin)

CN804 (17 pin)

Control Signal

SPEAKER (R)

SPEAKER (L)

USB (CN13)

DA0~DA13

DQ0~DQ15

RD0~RD7

CN805 (17 pin)

SDRAM

(512 Mbit)

IC8

EEPROM

(1 Gbit)

IC2

PWSW

PEDAL CONNECTOR

CN8 (5 pin)

KI0~KI2, KC0~KC2, LDH0~LDH2,
LDL0~LDL2, VOL

CN1 (16 pin)

CN601 (16 pin)

POWER

POWER
SWITCH

SWITCH

CN602 (3 pin)

CN603 (3 pin)

MAIN VOL.
(VR601)

CONSOLE PCB (M920-CNA1)

BUTTON & LED

BUTTON & LED

CONSOLE PCB

(M920-CNA2)

– 2 –

PCB INFORMATION

M920-MDA1M920-PSA1M920-CNA1M920-CNA2

AP-245

M920-KYB1M920-KYA1M920-HPA1

Parts Name PCB Name Functions

MAIN PCB

MPU, SDRAM, EEPROM, Power supply circuits, Preamp,

PCB UNIT/MAIN M920-MDA1

POWER & AMP PCB

PCB UNIT/POWER & AMP M920-PSA1

CONSOLE PCB

PCB UNIT/CNA
PCB UNIT/HPA1 M920-HPA1 Power lamp, PHONES jacks

KEYBOARD PCB

PCB UNIT/
KY and RUBBER CONTACT

M920-CNA1 Power switch, Buttons, LED
M920-CNA2 Main volume

M920-KYA1

M920-KYC1

Filter, DAC, APO Circuit, Electronic volume, USB port,
Pedal connector

Powersupplycircuits,Poweramplier,
Headphonesamplier,Speakers,DC12VTerminal

KeyboardM920-KYB1

M920-KYC1

– 3 –

AP-245

CIRCUIT DESCRIPTION



Nomenclature of Keys

A0# C1# D1# F1#G1#A1# C2#D2# F2# G2#A2# C3# D3# F3# G3#A3# C4# D4# F4# G4# A4# C5# D5# F5# G5# A5# C6# D6# F6# G6# A6# C7# D7# F7# G7# A7#

A0 B0 C1 D1 E1 F1 G1 A1 B1 C2 D2 E2 F2 G2 A2 B2 C3 D3 E3 F3 G3 A3 B3 C4 D4 E4 F4 G4 A4 B4 C5 D5 E5 F5 G5 A5 B5 C6 D6 E6 F6 G6 A6 B6 C7 D7 E7 F7 G7 A7 B7 C8



Key Matrix

Each key has three contacts, the fi rst contact , second contact  and third contact .

NOTE: The diagram below illustrates how the contacts work.

KI0

KI1

KB (0-3)

KS0

KS1

KS2

First contact 

Second contact 

Third contact 

KI (0-21)

KS0 KS1 KS2 KS0 KS1 KS2

(KB0) A0 (KB0) A0 (KB0)

A0



(KB1) A0# (KB1) A0# (KB1) F4# (KB1) F4# (KB1) F4# (KB1)

A0#



(KB2) B0 (KB2) B0 (KB2) G4 (KB2) G4 (KB2) G4 (KB2)

B0



(KB3) C1 (KB3) C1 (KB3) G4# (KB3) G4# (KB3) G4# (KB3)

C1



C1#

(KB0) C1# (KB0) C1# (KB0)



(KB1) D1 (KB1) D1 (KB1) A4# (KB1) A4# (KB1) A4# (KB1)

D1



D1#

(KB2) D1# (KB2) D1# (KB2) B4 (KB2) B4 (KB2) B4 (KB2)



E1

(KB3) E1 (KB3) E1 (KB3) C5 (KB3) C5 (KB3) C5 (KB3)



KI11

KI12

F4 (KB0) F4 (KB0) F4 (KB0)

A4 (KB0) A4 (KB0) A4 (KB0)

– 4 –

KI2

KI3

KI4

KI5

KI6

KI7

KI8

KI9

KI10

KS0 KS1 KS2 KS0 KS1 KS2

(KB0) F12 (KB0) F13 (KB0)

F1

1

(KB1) F1#2 (KB1) F1#3 (KB1) D51 (KB1) D52 (KB1) D53 (KB1)

F1#

1

(KB2) G12 (KB2) G13 (KB2) D5#1 (KB2) D5#2 (KB2) D5#3 (KB2)

G1

1

(KB3) G1#2 (KB3) G1#3 (KB3) E51 (KB3) E52 (KB3) E53 (KB3)

G1#

1

(KB0) A12 (KB0) A13 (KB0)

A1

1

A1#

(KB1) A1#2 (KB1) A1#3 (KB1) F5#1 (KB1) F5#2 (KB1) F5#3 (KB1)

1

(KB2) B12 (KB2) B13 (KB2) G51 (KB2) G52 (KB2) G53 (KB2)

B1

1

C2

(KB3) C22 (KB3) C23 (KB3) G5#1 (KB3) G5#2 (KB3) G5#3 (KB3)

1

(KB0) C2#2 (KB0) C2#3 (KB0)

C2#

1

(KB1) D22 (KB1) D23 (KB1) A5#1 (KB1) A5#2 (KB1) A5#3 (KB1)

D2

1

(KB2) D2#2 (KB2) D2#3 (KB2) B51 (KB2) B52 (KB2) B53 (KB2)

D2#

1

(KB3) E22 (KB3) E23 (KB3) C61 (KB3) C62 (KB3) C63 (KB3)

E2

1

(KB0) F22 (KB0) F23 (KB0)

F2

1

(KB1) F2#2 (KB1) F2#3 (KB1) D61 (KB1) D62 (KB1) D63 (KB1)

F2#

1

(KB2) G22 (KB2) G23 (KB2) D6#1 (KB2) D6#2 (KB2) D6#3 (KB2)

G2

1

(KB3) G2#2 (KB3) G2#3 (KB3) E61 (KB3) E62 (KB3) E63 (KB3)

G2#

1

(KB0) A22 (KB0) A23 (KB0)

A2

1

(KB1) A2#2 (KB1) A2#3 (KB1) F6#1 (KB1) F5#2 (KB1) F6#3 (KB1)

A2#

1

(KB2) B22 (KB2) B23 (KB2) G61 (KB2) G62 (KB2) G63 (KB2)

B2

1

(KB3) C32 (KB3) C33 (KB3) G6#1 (KB3) G6#2 (KB3) G6#3 (KB3)

C3

1

(KB0) C3#2 (KB0) C3#3 (KB0)

C3#

1

(KB1) D32 (KB1) D33 (KB1) A6#1 (KB1) A6#2 (KB1) A6#3 (KB1)

D3

1

(KB2) D3#2 (KB2) D3#3 (KB2) B61 (KB2) B62 (KB2) B63 (KB2)

D3#

1

(KB3) E32 (KB3) E33 (KB3) C71 (KB3) C72 (KB3) C73 (KB3)

E3

1

(KB0) F32 (KB0) F33 (KB0)

F3

1

(KB1) F3#2 (KB1) F3#3 (KB1) D71 (KB1) D72 (KB1) D73 (KB1)

F3#

1

(KB2) G32 (KB2) G33 (KB2) D7#1 (KB2) D7#2 (KB2) D7#3 (KB2)

G3

1

(KB3) G3#2 (KB3) G3#3 (KB3) E71 (KB3) E72 (KB3) E73 (KB3)

G3#

1

(KB0) A32 (KB0) A33 (KB0)

A3

1

(KB1) A3#2 (KB1) A3#3 (KB1) F7#1 (KB1) F7#2 (KB1) F7#3 (KB1)

A3#

1

(KB2) B32 (KB2) B33 (KB2) G71 (KB2) G72 (KB2) G73 (KB2)

B3

1

(KB3) C42 (KB3) C43 (KB3) G7#1 (KB3) G7#2 (KB3) G7#3 (KB3)

C4

1

(KB0) C4#2 (KB0) C4#3 (KB0)

C4#

1

(KB1) D42 (KB1) D43 (KB1) A7#1 (KB1) A7#2 (KB1) A7#3 (KB1)

D4

1

(KB2) D4#2 (KB2) D4#3 (KB2) B71 (KB2) B72 (KB2) B73 (KB2)

D4#

1

(KB3) E42 (KB3) E43 (KB3) C81 (KB3) C82 (KB3) C83 (KB3)

E4

1

KI13

KI14

KI15

KI16

KI17

KI18

KI19

KI20

KI21

C5#1 (KB0) C5#2 (KB0) C5#3 (KB0)

F51 (KB0) F52 (KB0) F53 (KB0)

A51 (KB0) A52 (KB0) A53 (KB0)

C6#1 (KB0) C6#2 (KB0) C6#3 (KB0)

F61 (KB0) F62 (KB0) F63 (KB0)

A61 (KB0) A62 (KB0) A63 (KB0)

C7#1 (KB0) C7#2 (KB0) C7#3 (KB0)

F71 (KB0) F72 (KB0) F73 (KB0)

A71 (KB0) A72 (KB0) A73 (KB0)

AP-245



Button Matrix

SI0 FUNCTION
SI1

METRONOME,

SI2 ELEC PIANO

SO0 SO1 SO2

DUET

SONG

DEMO

GRAND PIANO

(CONCERT)

– 5 –

a

,

GRAND PIANO

(MODERN)

RECORDER

(L/R)

PRINTED CIRCUIT BOARDS

MAIN PCB: M920-MDA1 POWER & AMP PCB: M920-PSA1

AP-245

– 6 –

AP-245

CONSOLE PCB: M920-CNA1

CONSOLE PCB: M920-CNA2

CONSOLE PCB: M920-HPA1

PEDAL PCB: M332-PDA1 PEDAL PCB: M332-PDA2

KEYBOARD PCB: M920-KYA1

– 7 –

KEYBOARD PCB: M920-KYB1

AP-245

KEYBOARD PCB: M920-KYC1

– 8 –

AP-245

DISASSEMBLY



About Repair

• The photos show a prototype of AP-250_BROWN. The appearance of the instrument, such
as color, may differ from the actual model.

•

Toavoiddamagestotheinstrumentandoor,laytheinstrumentonamattressorblanket
beforestartingdisassembling.

• Thereareseveralkindsofscrews.Besuretousethecorrecttypeofscrewswhen
assembling.Itisadvisabletosortthescrewsasshownbelowafterremovingthem.

• Ifascrewcapisattachedtothescrew,removeit.Besuretoreattachthescrewcapwhen
assembling.

•

Checkhowcablesarewiredbeforeremovingcables.Besuretowirethecablesinthesame
mannerastheywerebeforedisassembly.

• Incasecablesaresecuredwithcableties,securingbands,clips,ortapes,removethemrst.
Besuretosecurethecablesinplaceinthesamemannerastheywerebeforedisassembly.



Before Starting Repair or Servicing

• RemovetheACadaptor,ACcordorbatteries.

• Remove accessories such as the music stand.

– 9 –



Flowchart

AP-245

NOTE:

Some of the major components may be removed/replaced without removing the piano
unit from the stand. Remove the piano unit from the stand as necessary according to
the work environment and with due consideration for safety.

NOTE:

Parts indicated with a Gray Box must be removed when disassembling the parts
indicated with a

Assembled Product

A. Pedal Unit

B. Stand

E. BOX/PCB

C. TOP BOARD UNIT

White Box in the following step.

F. PCB UNIT/MAIN

G. PCB UNIT/POWER & AMP

N. SPEAKER

D. KEY COVER UNIT

The piano unit must be removed from

the stand when performing a repair.

J. SIDE BOARD

K. SIDE RACK UNIT

L. FRONT BOARD UNIT

M. PCB UNIT/HPA1

H. Console Unit I. PCB UNIT/CNA

E. BOX/PCB

O. KEYBOARD UNIT

DISASSEMBLY OF THE KEYBOARD UNIT

A. KEY

B. HAMMER

C. PCB UNIT/KY AND RUBBER CONTACT

– 10 –



Disassembly Procedure

A. Remove the Pedal Unit

A-1. Disconnect the plug for pedal unit from the pedal connector.

Plug for pedal unit

Clip

AP-245

A-2. Undo six screws on the back surface.

A-3. Undo four screws.

– 11 –

A-4. Remove the PEDAL BOARD UNIT.

AP-245

NOTE:

A-5. Turn the ADJUSTER to remove it.

The piano unit and stand become slightly unstable when the PEDAL BOARD UNIT is
removed. Use caution so that the piano unit doesn't fall or the stand doesn't fall over.

PEDAL BOARD UNIT

ADJUSTER

<Caution When Completing Repair>

• Be sure to adjust the ADJUSTER height.

NOTE: The pedal unit may be damaged if the pedal is operated without height adjustment.

– 12 –

A-6. Undo eight screws and then remove the PEDAL UNIT.

PEDAL UNIT

<Notes on Assembly>

• Tighten the screws for the PEDAL UNIT in the order of the numbers shown below.

AP-245

7 8

3

21

65

4

– 13 –

B. Remove the Stand

AP-245

NOTE:
NOTE:

B-1. Disconnect the plug for pedal unit from the pedal connector.

B-2. Undo two screws on the bottom surface.

Disassembling or assembling the stand must be done by two or more people.
When disassembling or assembling, take precautions, such as closing the key cover and tape it

closed, so as not to get a hand caught.

Plug for pedal unit

Clip

B-3. Placethepianounitontheoor.

NOTE:

Please do so with the key cover closed.

Back surface

– 14 –

B-4. Undo eight screws on the back surface and then remove the BACK BOARD.

AP-245

NOTE:

There are two types of screws. Be sure to use the correct screw when assembling.

BACK BOARD

B-5. Undo four screws and then remove the SIDE BOARD UNIT/LEFT, SIDE BOARD UNIT/RIGHT, and

PEDAL BOARD UNIT.

SIDE BOARD UNIT/RIGHT

SIDE BOARD UNIT/LEFT

PEDAL BOARD UNIT

– 15 –

C. Remove the TOP BOARD UNIT

C-1. Undo three screws on the back surface.

C-2. Slide the TOP BOARD UNIT to remove it.

TOP BOARD UNIT

AP-245

<Notes on Assembly>

• Assemble the TOP BOARD UNIT so that the brackets on the TOP BOARD UNIT and those on

themaincaset.

– 16 –

AP-245

D. Remove the KEY COVER UNIT

D-1. Close the key cover.
D-2. Undo one screw and then while lightly holding the damper in place, remove the SHAFT/for KEY

COVER (with the E-RING).

NOTE:

Remove the other side in the same manner.

SHAFT/for KEY COVER

Damper

D-3. Undo two screws on the bottom surface and then remove the SUPPORT BOARD.

[NOTE]

The SUPPORT BOARD was added to the product
after the production started.

SUPPORT BOARD

D-4. While slightly lifting the rear cover of the KEY COVER UNIT, slide the KEY COVER UNIT all the

way to the rear.

KEY COVER UNIT

– 17 –

AP-245

D-5. Check that the sliding pin on both sides of the rear cover of the KEY COVER UNIT is visible when

seen from above the rail.

Pin

D-6. Lift the rear cover of the KEY COVER UNIT and then disengage the pins from the rail.

Pin

D-7. While lifting the KEY COVER UNIT, slide the KEY COVER UNIT further toward the rear.
D-8. In the same manner as when disengaging the pins on the rear cover, disengage the pins on the

front cover from the rail and then remove the KEY COVER UNIT.

– 18 –

AP-245

<Notes on Assembly>

• To assemble the SHAFT/for KEY COVER, slightly lift the KEY COVER UNIT while holding the
damper in place, and position the hole to insert the SHAFT/for KEY COVER.

• Align the groove on the SHAFT/for KEY COVER to that on the damper.

DamperKEY COVER UNIT

SHAFT/for KEY COVER

E. Remove the BOX/PCB

NOTE:

E-1. Undo four screws on the bottom surface.

If you perform the following steps while the piano unit is attached to the stand, use caution as
not to drop the BOX/PCB nor apply too much tension to the cables and connectors.

BOX/PCB

– 19 –

E-2. Slide the BOX/PCB to remove it.

AP-245

NOTE:

NOTE:

E-3. Disconnect six connectors and then remove the BOX/PCB.

NOTE:

The BOX/PCB and piano unit are connected with cables. Use caution when removing the
BOX/PCB.

Be sure to hold the BOX/PCB with a hand so as not to add tension to the cables and
connectors.

BOX/PCB

Releasetheconnectorlockbeforedisconnectingtheatcable.

     

1
2
3
4
5
6

Type Connected From Connected To (CN No.)

Harness HPA1 PCB PSA1 PCB (CN3)
Harness Left speaker PSA1 PCB (CN9)
Harness Right speaker PSA1 PCB (CN6)
Harness CNA1 PCB MDA1 PCB (CN1)

Flat cable KYB1 PCB MDA1 PCB (CN3)

Harness Pedal connector MDA1 PCB (CN8)

– 20 –

F. Remove the PCB UNIT/MAIN

F-1. Disconnect one connector.
F-2. UndovescrewsandthenremovethePCBUNIT/MAIN.

AP-245

PCB UNIT/POWER & AMP

(PSA1 PCB)

Connector

PCB UNIT/MAIN

(MDA1 PCB)

<Notes on Assembly>

• Connect the connector for the PSA1 PCB before assembling the MDA1 PCB to the BOX/PCB.

Connector

– 21 –

G. Remove the PCB UNIT/POWER & AMP

G-1. Disconnect one connector.
G-2. Undo six screws and then remove the PCB UNIT/POWER & AMP.

AP-245

PCB UNIT/POWER & AMP

(PSA1 PCB)

Connector

PCB UNIT/MAIN

(MDA1 PCB)

<Notes on Assembly>

• Connect the connector for the PSA1 PCB with the MDA1 PCB removed.

Connector

– 22 –

H. Remove the Console Unit

H-1. Disconnect the connector for CNA1 PCB from the BOX/PCB.

AP-245

NOTE:

H-2. Undo nine screws.

NOTE:

Please refer to the “E. Remove the BOX/PCB”.

The center bracket is screwed at a different hole position from the other brackets.

CENTER OTHEROTHER

H-3. Lift the console unit until it warps slightly. While maintaining this state, disengage the joint of the

SIDE RACK UNIT and console unit on one side.

NOTE:

NOTE:

Do not apply too much force. Doing so may damage the digital piano.

Be careful not to damage the KEY FELT.

SIDE RACK UNIT

Console unitKEY FELT

– 23 –

H-4. Disengage the joint on the other side and remove the console unit.

Cut off any excess material

Console unit

<Caution When Replacing With New Parts>

• Attach the KEY FELT as shown below.

KEY FELT

2 ~ 4 mm 2 ~ 4 mm

AP-245

1 ± 0.5 mm

FABRIC TAPE/10X42 FABRIC TAPE/10X42CONSOLE PANEL/LEFT & RIGHT

– 24 –

I. Remove the PCB UNIT/CNA

AP-245

NOTE:

I-1. Undo four screws and then remove two PLASTIC BRACKET.

I-2. Undo 13 screws and then remove the PCB UNIT/CNA.

The PCB UNIT/CNA consists of the CNA1 PCB and CNA2 PCB.

PLASTIC BRACKET

PCB UNIT/CNA

CNA2 PCBCNA1 PCB

– 25 –

AP-245

<Caution When Replacing With New Parts>

• A new CONSOLE PANEL/MIDDLE does not come with the NAME PLATE. When replacing the
CONSOLE PANEL/MIDDLE, attach the NAME PLATE with the DOUBLE FACED TAPE.

NAME PLATE

DOUBLE FACED TAPE

76.5 ± 2 mm

24.0 ± 2 mm

CONSOLE PANEL/MIDDLE

<Notes on Assembly>

• Before assembling the PCB UNIT/CNA, check that the KNOB/for ROTARY, TACT BUTTON,
LED COVER, LED SPACER, and FABRIC SHEET have been assembled to the CONSOLE
PANEL/MIDDLE.

J. Remove the SIDE BOARD

NOTE:

J-1. Undo two screws on the bottom surface.
J-2. Undo two screws on the back surface.

The basic procedure to remove the part is the same on both sides.

– 26 –

J-3. Undo two screws and then remove the BRACKET.
J-4. Undo three screws.

SIDE RACK UNIT SIDE BOARD

BRACKET

J-5. Remove the SCREW CAP and then undo one screw.

AP-245

NOTE:

The SCREW CAP is secured with the DOUBLE FACED TAPE.

SCREW CAP

J-6. Remove the SIDE BOARD.

– 27 –

K. Remove the SIDE RACK UNIT

AP-245

NOTE:

K-1. Undo two screws on the bottom surface.

K-2. Undo one screw.

The basic procedure to remove the part is the same on both sides.

SIDE RACK UNIT

Console unit

K-3. Undo one screw on the side surface and then remove the SIDE RACK UNIT and SIDE BLOCK.

SIDE RACK UNIT SIDE BLOCK SIDE RACK UNIT

– 28 –

K-4. Undo two screws and then remove the SIDE BLOCK from the SIDE RACK UNIT.

SIDE RACK UNIT

SIDE BLOCK

K-5. Remove the RUBBER FOOT.

RUBBER FOOT

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– 29 –

L. Remove the FRONT BOARD UNIT

L-1. Disconnect the connector for HPA1 PCB from the BOX/PCB.

AP-245

NOTE:

L-2. Undo six screws on the bottom surface and then remove the FRONT BOARD UNIT.

Please refer to the “E. Remove the BOX/PCB”.

FRONT BOARD UNIT

– 30 –

M. Remove the PCB UNIT/HPA1

M-1. Disconnect the connector for HPA1 PCB from the BOX/PCB.

AP-245

NOTE:

M-2. Undo two screws and then remove the PCB UNIT/HPA1.

Please refer to the “E. Remove the BOX/PCB”.

PCB UNIT/HPA1

<Caution When Replacing With New Parts>

• Mount the LED as shown below while paying attention to the polarity.

25.1 ± 0.3 mm

D1

N. Remove the SPEAKER

NOTE:

N-1. To replace the harness for the speaker, disconnect the speaker connector from the BOX/PCB.

N-2. Undo two screws and then remove the COVER NET.

The basic procedure to remove the part is the same on both sides.

NOTE:

Please refer to the “E. Remove the BOX/PCB”.

COVER NET

– 31 –

N-3. Unsolder the harness.
N-4. Undo four screws and then remove the SPEAKER and SPEAKER NET.

<Left speaker> <Right speaker>

AP-245

Positive terminal (Red)

Negative terminal (Black)

Negative terminal (White)

Positive terminal (Red)

SPEAKER NETSPEAEKER

<Notes on Assembly>

• The SPEAKER NET has front and back faces. Face the smooth surface to the bottom when
assembling.

– 32 –

O. Remove the KEYBOARD UNIT

O-1. Undo 15 screws and then remove seven PLASTIC BASE.

AP-245

NOTE:

The PLASTIC BASE at the center and the both ends are screwed at different hole
positions from the others.

CENTER OTHEROTHERLEFT RIGHT

O-2. Undo three screws.

– 33 –

O-3. Undo 19 screws on the bottom surface and then remove the KEYBOARD UNIT.

KEYBOARD UNIT

AP-245

– 34 –



7 mm

Disassembly of the KEYBOARD UNIT

A. Remove the KEY

<Removing the Keys>

• To remove the keys, you will need two of the tools described below.

• Beforeremovingablackkey,youmustrstremovebothwhitekeysoneithersideoftheblack

key.

• White keys may be removed with the same procedures as removing black keys.

<Tool>

• The tool used in the photos in this section was converted from a gardening ID tag. The size and
shape of an ID tag accord to the dimensions below.

<Note on Shaping an ID Tag>

• The thickness of the tool must be within 1.2 ~ 1.3 mm. If the tool is too thin, removing keys

becomedifcult.Ifthetoolistoothick,itmaydamagetheribofthechassis.

AP-245

<Tool Dimensions>

Width:
15~20 mm

Thickness:
within 1.2~1.3 mm

R=2.75 mm

Use this part to
remove the key.

– 35 –

A-1. Undo 12 screws and then remove four KEY SPACER.

AP-245

NOTE:

There are four types of the KEY SPACER. Be sure to use the correct type when
assembling.

KEY SPACER/A KEY SPACER/B KEY SPACER/C KEY SPACER/D

KEY SPACER/A

KEY SPACER/B

KEY SPACER/C

KEY SPACER/D

<How to Identify KEY SPACER>

• ThereisanidenticationmarkingontheupperrightorupperleftoftheKEYSPACER.

Parts Name Marking

KEY SPACER/A SPC-A
KEY SPACER/B SPC-B
KEY SPACER/C SPC-C
KEY SPACER/D SPC-D

– 36 –

A-2. Insert the two tools between the rib of the chassis and a key and then remove the key.

AP-245

NOTE:

Whenyouinsertthetoolstoacertainextent,thelatchwhichxingthekeyisdisengaged

and the keys are lifted for removal.

Tools

Chassis

<Cross-section Image>

Tool

KEYRib of the chassis

– 37 –

<Reference: Musical Scale>

Left end Right end

• The scale shown below is used for the piano.

Scale

Note

C

(Do)

D

(Re)

E

(Mi)

(Fa)

F

G

(So)

A

(La)

AP-245

B

(Ti)

SA

B C D E F G A B C D E F G A B C D E F G A B

(A)

<Keyboard Layout>

• Refer to the illustration on the right and install the white keys in
the correct order of the note.

NOTE: A note is marked at the upper end of each key. You

may ignore the number marked after the note.

NOTE: The parts for the keys at both ends and the second

one from the left end differ from the other keys with the
same notes.

NOTE: InstallthekeysintheorderofC→D→E→F→G

→A→Bintherangemarkedwitharedbrokenlinein

the illustration (the range between the third key from
the left end and the second key from the right end).

• All black keys are identical; therefore, they may be installed in
any order.

C D E F G A B C D E F G A B C D E F G A B C D E F G A B SC

Note

D F ASA B

SA

B C D E F G A B SC

BE GC

(C)

SC

– 38 –

<Caution When Replacing With New Parts>

• A set of new white keys consists of the parts below.

NOTE: Remove the part indicated with a red line before use.
NOTE: The parts for the keys at both ends and the second one from the left end differ from

the other keys with the same notes.

Parts Name Note Remarks

WHITE KEY/SA SA (A) Designated for the left end

1

WHITE KEY/B B Designated for the second key from the left end

2

WHITE KEY/CEGB C/E/G/B A set of C/E/G/B

3

WHITE KEY/DFA D/F/A A set of D/F/A

4

WHITE KEY/SC SC (C) Designated for the right end

5

AP-245

BE GC

D F ASA B

    

SC

– 39 –

<Applying Grease>

• Apply grease on the guide for keys as necessary after the keys are replaced.

NOTE: Apply grease on the side of the guide for keys.

Code No. Parts Name Specifi cation

94816509 SILICONE GREASE G-501.80G-PC

Guide for black key

AP-245

Guide for white key

Guide for white key

Apply grease here

(In the area indicated in green)

Guide for black key

Apply grease here

(In the area indicated in green)

– 40 –

<Installing the Keys>

Fit securely into the chassis.

• Follow the steps below to install the white and black keys.
NOTE: Thewhitekeysmustbearrangedinaspecicorder.Installthemaccordingtothe

correct order of the note. Be sure to install the white key at a hammer for a white key.

NOTE: Install a black key before installing the white keys on its sides. Be sure to install the

black key at a hammer for a black key.
(1) Assemble a key to a hammer.
(2) Pressthekeytottheholeofthekeywiththeprotrusionofthechassis.
(3) Press the key and check to see if it moves properly.

AP-245

Assemble a key to a hammer.

<Locations to Install the White and Black Keys>

• Install a white key in the position of a guide for white key.

• Install a black key in the position of a guide for black key.

Guide for black key

Guide for white key

– 41 –

B. Remove the HAMMER

Tweezers

B-1. Place the chassis upside down so that the hammers are visible.

<Identifying the Hammers When Placed Upside Down>

• The size chassis hole differs between white and black keys. The hammer for a black key goes
into a bigger hole, while the hammer for a white key goes into a smaller hole.

Hammer for white key Hammer for black key

B-2. Press the chassis with the tip of tweezers.

AP-245

B-3. While catching a hammer with tweezers, set the tweezers against the resin part of the chassis.
B-4. Using the chassis-tweezer contact as a fulcrum point, press down against the resin part in the

direction of the red arrow shown below, and then disengage the hammer.

NOTE:

NOTE:

You must press the resin part of the hammer. Pressing on the metal part of the hammer
may damage the area connected to the resin.

If a hammer does not disengage easily, perform the steps while lifting the hammer.

Press down the resin part.

Fulcrum point

– 42 –

<Kinds of Hammers>

Type of Hammer (for a white key)

<Hammers for black keys>

• Thereareseveralkindsofhammers.Thetypeofahammermaybeidentiedbythecode

engraved on it.

Type of Hammer: “W” for a white key, “B” for a black key.
Hammer Code: The hammers for white keys are coded W1, W2, W3, and W4.

The hammers for black keys are coded B1, B2, B3, and W4.

Hammer Code (for a white key)

AP-245

Type of Hammer (for a black key)

Hammer Code (for a black key)

<Location to Install the Hammers>

• A hammer must be installed at the correct location according to its type. The combination of
hammers and keys are shown below.

B1 (9 keys) B2 (9 keys) B3 (9 keys) B4 (9 keys)

W1 (13 keys)

W2 (13 keys)

<Hammers for white keys>

– 43 –

W3 (13 keys) W4 (13 keys)

<Installing the Hammers>

Tweezers

• Follow the steps below to install the hammers for white and black keys.
NOTE: Thehammersmustbearrangedinaspecicorder.Installthemaccordingtothe

correct order.

NOTE: If a hammer does not move smoothly, check to see if it is installed at the correct

location.
(1) Use the tweezers to set a hammer at its correct location.
(2) Press the chassis with the tip of tweezers.
(3) Using the chassis-tweezers contact as a fulcrum point, press down the metal part of the

hammer in the direction of the red arrow shown below, and then install the hammer.
NOTE: Be careful not to damage the felt.

Press down against the metal part.

AP-245

Locked at this point

Fulcrum point

Be careful not to damage the felt.

– 44 –

C. Remove the PCB UNIT/KY AND RUBBER CONTACT

AP-245

NOTE:

The PCB UNIT/KY AND RUBBER CONTACT consists of the KYA1 PCB, KYB1 PCB, and KYC1

PCB.
C-1. Release the connector lock and remove the FLAT CABLE.
C-2. Undo 23 screws and then remove the PCB UNIT/KY AND RUBBER CONTACT.

FLAT CABLE

KYA1 PCB KYB1 PCB KYC1 PCB

C-3. Remove eight RUBBER CONTACT.

NOTE:

One RUBBER CONTACT differs in length.

PCB UNIT/KY AND RUBBER CONTACT

RUBBER CONTACT Short RUBBER CONTACT

RUBBER CONTACT/AG

– 45 –

RUBBER CONTACT/AC

<Installing the PCB UNIT/KY AND RUBBER CONTACT>

• Secure the PCB UNIT/KY AND RUBBER CONTACT with 23 screws.

NOTE: Tighten the screws while pressing the PCB in the direction of the red arrow shown

below.

• Connect the FLAT CABLE to the KYB1 PCB and lock the connector.

NOTE: Insertitrmlyandlockup.

AP-245

FLAT CABLE

<How to Install RUBBER CONTACT>

• LightlyinsertthetipofaRUBBERCONTACTintothePCBrst,andthenpressitinusingthe

end of a paper clip.
NOTE: Do not press with too much force. Doing so may damage the RUBBER CONTACT.

– 46 –



Test Items / Flowchart

Start

“FUNCTION” + “SONG” + “RECORDER” + POWER ON

Start the Diagnostic Program

(Flash Sum Check / LED Check)

“FUNCTION” × 2

Model Check

“FUNCTION”

ROM Version Check

“FUNCTION” × 2

AP-245

DIAGNOSTIC PROGRAM

Button Check / Pedal Check

“FUNCTION” × 2

Keyboard Check /

Speaker Polarity Check

“FUNCTION”

USB Check

“FUNCTION”

RAM Check

“FUNCTION” *Restarts in the user mode.

End the Diagnostic Program



Preparation

(1) Connect the AC adaptor.

PREPARATION: PC & USB cable

POWER OFF

(2) Connect the pedal.
(3) Adjust the main volume so that it is at about 1/3 of the full volume.
(4) Have a PC and USB cable ready.

NOTE:
NOTE:

Please refer to the user's guide for PC system requirements.
The “USB Check” cannot be performed without a PC and a USB cable.

– 47 –

AP-245

A0# C1# D1# F1# G1# A1# C2# D2# F2# G2# A2# C3# D3# F3# G3#A3# C4# D4# F4# G4# A4# C5# D5# F5# G5# A5# C6# D6# F6# G6# A6# C7# D7# F7# G7# A7#



Test Procedure

ADDITIONAL NOTE:

Refer to the below for the pitch of the conrmation or error tones which you hear during the test.

A0 B0 C1 D1 E1 F1 G1 A1 B1 C2 D2 E2 F2 G2 A2 B2 C3 D3 E3 F3 G3 A3 B3 C4 D4 E4 F4 G4 A4 B4 C5 D5 E5 F5 G5 A5 B5 C6 D6 E6 F6 G6 A6 B6 C7 D7 E7 F7 G7 A7 B7 C8

A. Start the Diagnostic Program (Flash Sum Check / LED Check)

A-1. Hold down the “FUNCTION”, “SONG” and “RECORDER” buttons at the same time to turn the

power ON.

NOTE:

NOTE:

<LED status during the diagnostic program startup>

Hold down three buttons until the diagnostic program starts.

• When the diagnostic program starts, all LEDs illuminate briey. Release the three
buttons after the LEDs illuminate.

• The “P” (Power) LED remains ON.

It takes approximately ve seconds for the diagnostic program to start.

– 48 –

AP-245

A-2. Once the diagnostic program is started, the “Flash Sum Check” is performed automatically.

If the result passes (OK):

• The program automatically proceeds to the next step.

If the result fails (NG):

The“SONG(Left)”,“SONG(Right)”and“RECORDER”LEDsareashing.Pressthe

•

“FUNCTION” button to restart the digital piano in the user mode.

A-3. The “LED Check” starts automatically and the LEDs keep illuminating in the order shown below.

• Lit in Yellow: SONG (Left)

• Lit in Red: SONG (Right), RECORDER, L, R, CONCERT, MODERN, ELEC PIANO

A-4. Check that all LEDs illuminate.

B. Model Check

NOTE:

B-1. Press the “FUNCTION” button.

B-2. Press the “FUNCTION” button again.

B-3. CheckthatthemodelidenticationtonesoundsandalsothatthefollowingLEDisashing.

To skip this check, press the “FUNCTION” button twice and proceed to the next check.

NOTE:

NOTE:

<For AP-245>

•

• Flashing in Red: CONCERT

Theconrmationchord(C4/E4/G4)sounds.

Themodelidenticationtone(C4)soundsimmediatelyaftertheconrmationchord(C4/

E4/G4).

Modelidenticationtone:C4

– 49 –

C. ROM Version Check

(This section describes how to identify the ROM version, not to test it.)

AP-245

NOTE:

C-1. When you press the “FUNCTION” button, the following LEDs illuminate and the ROM Version

C-2. You can identify the ROM version (4 digits) by repeatedly pressing the “SONG” button while in the

To skip this check, press the “FUNCTION” button and proceed to the next check.

Check Mode enters into its stand-by status.

NOTE:

• Lit in Red: RECORDER, CONCERT, MODERN, ELEC PIANO

stand-by status.

NOTE:

NOTE:

Theconrmationchord(C4/E4/G4)sounds.

The number indicating each digit of the ROM version will be expressed by LEDs that
illuminate.

Eachtimeyoupressthe“SONG”button,theconrmationtone(C6)soundsandtheLED

indication moves to the next digit.

Stand-by status
(As in step C-1)

“SONG” “SONG” “SONG” “SONG”

4th digit 3rd digit 2nd digit 1st digit

<Version number vs. LED indication>

Number LED Number LED

0 All LEDs OFF 6 “CONCERT” + “MODERN”
1 “ELEC PIANO”
2 “MODERN”
3 “MODERN” + “ELEC PIANO” 8 “RECORDER”
4 “CONCERT” 9 “RECORDER” + “ELEC PIANO”
5 “CONCERT” + “ELEC PIANO”

<Example>
The example below shows the ROM version “0105” (Ver. 1.05).

Stand-by status

↓

4th digit All LEDs OFF (Version number: 0)

↓

3rd digit “ELEC PIANO” (Version number: 1)

↓

2nd digit All LEDs OFF (Version number: 0)

↓

1st digit “CONCERT” + “ELEC PIANO” (Version number: 5)

“CONCERT” + “MODERN” +

7

“ELEC PIANO”

– 50 –

D. Button Check

AP-245

NOTE:

D-1. Press the “FUNCTION” button twice.

D-2. Press the buttons in the order shown below.

This check cannot be skipped.

NOTE:

If the result passes (OK):

• Theconrmationtone(C6)sounds.

• Whenpressthe“ELECPIANO”buttonattheend,theconrmationchord(C4/E4/G4)sounds.

If the result fails (NG):

• If there is a button failure or the buttons are pressed in a wrong sequence, the error tone (F2)

Theconrmationchord(C4/E4/G4)soundseachtimeyoupressthebutton.

sounds.

E. Pedal Check

NOTE:

When you choose to skip this check, simply proceed to the next check.

E-1. Press the “SOFT” pedal and then check that the “CONCERT”

LED is lit.

NOTE:

• Lit in Red: CONCERT

E-2. Press the “SOSTENUTO” pedal and then check that the

“MODERN” LED is lit.

NOTE:

• Lit in Red: MODERN

E-3. Press the “DAMPER” pedal fully and then check that the “ELEC PIANO” LED is lit.

NOTE:

• Lit in Red: ELEC PIANO

Theconrmationtone(E4)sounds.

SOFT DAMPER

SOSTENUTO

Theconrmationtone(G4)sounds.

Theconrmationtone(C4)sounds.

E-4. Press the “DAMPER” pedal halfway (half-pedal) and then check that the “ELEC PIANO” LED is

ashing.

NOTE:

• Flashing in Red: ELEC PIANO

Theconrmationtone(C5)sounds.

– 51 –

F. Keyboard Check

NOTE: To skip this check, press the “FUNCTION” button twice and proceed to the next check.

F-1. Press the “FUNCTION” button twice and then check that the “SONG (Left)” LED is lit.

NOTE: Theconrmationchord(C4/E4/G4)soundseachtimeyoupressthebutton.

NOTE: The LED does not illuminate if the touch response adjustment data has been reset.

Please refer to the “Resetting the Touch Response Adjustment Data” for details.

• Lit in Yellow: SONG (Left)

F-2. Press the “ELEC PIANO” button and then check that the “ELEC PIANO” LED is lit.

• Lit in Red: ELEC PIANO

AP-245

F-3. Press a key and then check that the sound comes out (sine wave) as follows.

NOTE: Check all keys.

Key Left Speaker Right Speaker Remarks

Press a key

halfway

Press a key

all the way

C6 sine wave When the contact

C6 sine wave C4 sine wave

When the contact
turned ON

G. Speaker Polarity Check

NOTE: When you choose to skip this check, simply proceed to the next check.

is turned ON

1

and 3 are

2

G-1. Press the “MODERN” button and then check that the “MODERN” LED is lit.

• Lit in Red: MODERN

G-2. Press any key and then check that the sound correctly comes out (sine wave).

NOTE: Check the sound while you are at the center of the digital piano.

– 52 –

H. USB Check

AP-245

NOTE:

H-1. Press the “FUNCTION” button.

H-2. Press the “CONCERT” button and then check that the “L” LED is lit.

H-3. Connect the digital piano to the PC with a USB cable.
H-4. Press the “CONCERT” button and then check that the “R” LED is lit.

To skip this check, press the “FUNCTION” button and proceed to the next check.

NOTE:

NOTE:

• Lit in Red: L

NOTE:

• Lit in Red: R

Theconrmationchord(C4/E4/G4)sounds.

Theconrmationtone(F2)sounds.

Theconrmationtone(C6)sounds.

H-5. Disconnect the USB cable.

– 53 –

I. RAM Check

AP-245

NOTE:

I-1. Pressthe“FUNCTION”buttonandthencheckthatthefollowingLEDsareashing.

I-2. Press the “SONG” button to start the check. Check that the LED status changes as shown below.

To skip this check and end the diagnostic program, press the “FUNCTION” button twice to
restart the digital piano in the user mode.

NOTE:

• Flashing in Yellow: SONG (Left)

• Flashing in Red: SONG (Right)

NOTE:

Theconrmationchord(C4/E4/G4)sounds.

It takes approximately 15 seconds until the check ends.

During the Writing Check

“SONG (Left)” LED Lit in Yellow

“SONG (Right)” LED OFF

During the Reading Check

“SONG (Left)” LED OFF

“SONG (Right)” LED Lit in Red

The Check Complete

“SONG (Left)” LED Lit in Yellow

“SONG (Right)” LED Lit in Red

I-3. Press the “FUNCTION” button to restart the digital piano in the user mode.

<LED status during the user mode>

• Lit in Red: L, R, CONCERT

I-4. Turn the power OFF.

– 54 –

AP-245



Resetting the Touch Response Adjustment Data

<Caution>

Be sure to reset the touch response adjustment data by following the steps below after
the main PCB or a keyboard component is replaced.

<Applicable Parts>

•Main PCB (MDA1 PCB)

•KEYBOARD UNIT

•Components for the KEYBOARD UNIT

(Refer to the EXPLODED VIEW and PART LIST: KEYBOARD UNIT)

<Reset Procedure>

(1) Hold down the “FUNCTION”, “CONCERT” and “MODERN” buttons at the same time to turn the

power ON.

NOTE:

<LED status during the reset mode startup>

Hold down three buttons until the reset mode starts.

• When the reset mode starts, all LEDs illuminate. Release the three buttons after the LEDs
illuminate.

• The “P” (Power) LED remains ON.

(2) Press the “SONG” button and then check that the following LEDs are lit.

• Lit in Red: L, R

– 55 –

(3) Press the “METRONOME” button and then check that the following LEDs are lit.

• Lit in Red: R, ELEC PIANO

(4) Press the “ELEC PIANO” button and then check that the following LEDs are lit.

• Lit in Yellow: SONG (Left)

• Lit in Red: RECORDER, R, ELEC PIANO

(5) Press the “RECORDER” and “METRONOME” buttons at the same time to start resetting.

AP-245

(6) When resetting is complete, the digital piano restarts in the user mode.

<LED status during the user mode>

(7) Turn the power OFF.

NOTE:

After resetting is complete, perform the “KEYBOARD CHECK” in the diagnostic program
and then check that the touch response adjustment data has been reset. Please refer to
the “DIAGNOSTIC PROGRAM” for details.

– 56 –

TOP BOARD & CONSOLE UNIT

6

AP-245

EXPLODED VIEW

9

8

12

16

9

8

Detail A (Both side)

10

7

Detail B (Both side)

11

15
17

18

BUTTON AREA

19

25

24

20
23

14

28

13

27

21

22

28

17

26

30

– 57 –

29

3

31

32

KEYBOARD UNIT

AP-245

33

38

39

36

40

43

35

41

42

44

47

48

45
46

53

34

49

50

37

51

5

54

52

56

55

– 58 –

Detail A

59

60

58

57 56

58 55

57

MAIN CASE UNIT

AP-245

62

64

61

67

63

65

* Added to the product
after the production
started.

66

67-1

67-3

KEYBOARD UNIT

63

64

67

67-2

74

79

Detail B

78

70

CNA1 & Harness

61

80

69-1

69

71

73

81

69-1

70

71

80

68

74

77

72

Detail A (Both side)

75
76
74

4

– 59 –

81

82

1

2

83

84

AP-245

STAND

85

86

87

88

89

88

91

93

90

92

94

– 60 –

PARTS LIST

AP-245

AP-245

Notes:

1. Prices and specifi cations are subject to change
without prior notice.

2. Refer to the latest “Parts Price Code” at
“PARTS FINDER” on the Casio Service WEB site
(https://www.servicecasio.com).

3. As for spare parts order and supply, refer to
the “GUIDEBOOK for Spare Parts Supply”,
published separately.

4. The numbers in item column correspond to
the same numbers in drawing.

– 61 –

1: AP-245_BLACK_DI

y

2: AP-245_BLACK_EU
3: AP-245_BLACK_UK
4: AP-245_BLACK_US

AP-245

Q't

1234

MAIN PCB

N 1 10433618 PCB UNIT/MAIN TK-RJM512378*002 1111AMDA1

CN13 10236624 CONNECTOR/USB UBR24-4K5G00 1111C
N IC3,IC4 10427243 IC BD00IA5WEFJ-E2 2222X
N IC6 10431989 IC WM8740SEDS/RV 1111X
N IC7 10422005 IC SN74LVC1G123DCTR 1111X

IC10 10375074 IC XC6404FY52PR-G 1111X
IC11 10430187 IC XC6701D902PR-G 1111X

IC12,IC14 10211950 IC NJM2068M-D(TE1) 2222X

N IC13 10430918 IC BD3464FV-E2 1111X

Q1,Q7-Q9,Q14-Q16 10402605 TRANSISTOR DSA500100L 7777X

Q2-Q6,Q10,Q11 10399706 TRANSISTOR DSC500100L 7777X

D1-D3 10009218 DIODE 1SS400TE61 3333X

L25 10193074 COIL DLW21HN181SQ2L 1111X

X1 10431923 RESONATOR 7V22580001 1111X
X2 10375016 RESONATOR 7V48080006 1111X

POWER & AMP PCB

N 2 10433594 PCB UNIT/POW ER & AMP TK-RJM512379*001 1111BPSA1

J2 10334294 JACK/DC KM02022ABMP 1111A
IC1 10306512 IC TDA7297 1111X
IC2 10375029 IC LA5756-MDB-E 1111X
IC3 10430186 IC XC8102AA01MR-G 1111X
IC4 10430185 IC XC6701BC02PR-G 1111X
IC5 10430184 IC XC6701B502PR-G 1111X
IC6 10430183 IC XC6216D332PR-G 1111X
IC7 10306415 IC BH3547F-E2 1111X

Q1,Q2,Q10,Q11,

Q20,Q21,Q25

D1 10294394 DIODE SK34A 1111X
D10 10430929 DIODE DB2X41400L 1111X
D20 10073815 DIODE UDZSTE-178.2B 1111X

L1,L10,L11 10231920 COIL RB53-856397NP 3333X

L20 10232457 COIL RII7-860400NP 1111X

10399706 TRANSISTOR DSC500100L 7777X

R RemarksN Item Code No. Parts Name Specification

– 62 –

1: AP-245_BLACK_DI

y

2: AP-245_BLACK_EU
3: AP-245_BLACK_UK
4: AP-245_BLACK_US

AP-245

Q't

1234

CNA PCB & HPA1 PCB

N 3 10433563 PCB UNIT/CNA TK-RJM512320*002 1111CCNA1/CNA2

D601,D603-D609 10336974 LED 26-21/R1 8888X

D602 10336975 LED 26-21/Y1 1111X

D610-D612 23901820 DIODE 1SS355TE-17 3333X

SW601-SW608 10337110 SWITCH TP-1138A-10-100GF 8888X

VR601 10399354 VARIABLE RESISTOR F-09KH1-CASIO-2 1111BMain volume

N 4 10433603 PCB UNIT/HPA1 TK-RJM512381*001 1111CHPA1

D1 10203050 LED 231XHD 1111XPower lamp

J701,J702 10132088 JACK/PHONE JY-6360*01-070 2222B
L701,L702 10231919 COIL RB53-856396NP 2222X

KEYBOARD PCB

N510433482 PCB UNIT/KY and RUBBER CONTACT TK-RJM512336*001 1 1 1 1 C KYA1/KYB1/KYC1

D1-D46 10301580 DIODE LM1MA142WAT1G 46 46 46 46 X

Q101-Q364 69300298 TRANSISTOR 2SC4081T106R 264 264 264 264 X

TOP BOARD & CONSOLE UNIT

N 6 10433619 TOP BOARD UNIT TK-RJM512086*001 1 1 1 X

N 6 10499507 TOP BOARD UNIT TK-RJM512086*003 1 X

N 7 10433564 KEY COVER UNIT TK-RJM511862*001 1 1 1 C

N 7 10499464 KEY COVER UNIT TK-RJM511862*007 1 C

N 8 10431988 SHAFT/for KEY COVER RJM512131-001V01 2 2 2 2 X
N 9 10232237 E RING R-ER-4Z3BL 2 2 2 2 X
N 10 10428382 SLIDE CAP/B RJM512241-001V01 2 2 2 2 X

11 10211851 SLIDE CAP RJM505899-001V01 2 2 2 2 X
N 12 10428359 PLASTIC BRACKET RJM511973-001V01 7 7 7 7 X
N 13 10428364 NAME PLATE RJM511986-001V01 1 1 1 1 X

14 10305053 DOUBLE FACED TAPE RJM507535-001V02 1 1 1 1 X for NAME PLATE
N 15 10427192 CONSOLE PANEL/LEFT RJM511903-001V01 1 1 1 1 X
N 16 10427193 CONSOLE PANEL/RIGHT RJM511904-001V01 1 1 1 1 X
N 17 69239090 FABRIC TAPE/10X42 M440240-1 2 2 2 2 X

18 10337938 KEY FELT RJM509922-001V01 1 1 1 1 X
N 19 10459139 CONSOLE PANEL/MIDDLE RJM512018-007V01 1 1 1 1 X

20 10337054 LED COVER RJM509410-001V01 3 3 3 3 X

R RemarksN Item Code No. Parts Name Specification

– 63 –

1: AP-245_BLACK_DI

y

2: AP-245_BLACK_EU
3: AP-245_BLACK_UK
4: AP-245_BLACK_US

AP-245

Q't

1234

21 10428304 LED COVER RJM512166-001V01 2222X

22 10428263 LED SPACER/A RJM512126-001V01 2222X

23 10428264 LED SPACER/B RJM512127-001V01 1111X

24 10428362 KNOB/for ROTARY RJM512136-001V01 1111C

25 10342127 TACT BUTTON/A RJM509408-002V01 1111X

26 10431933 TACT BUTTON/A RJM509408-004V01 1111X

27 10337029 TACT BUTTON/B RJM509396-001V01 1111X

28 10337030 TACT BUTTON/B RJM509396-002V01 2222X

29 10433684 FABRIC SHEET/A RJM512456-001V01 1111X

30 10450096 FABRIC SHEET/B RJM512457-003V02 1111X
N 31 10436783 FABRIC TAPE/10X42 M440240-003V01 1111X
N 32 10439051 FABRIC TAPE/5X30 M440583-004V01 1111X

KEYBOARD UNIT

N3310433481 KEYBOARD UNIT TK-RJM512338*001 1111C
N3410439085 BLACK KEY RJM512042-001V02 36 36 36 36 B
N 35 10437155 WHITE KEY/SA RJM512040-002V02 1 1 1 1 X
N 36 10437154 WHITE KEY/B RJM512039-002V02 1 1 1 1 X
N 37 10437152 WHITE KEY/CEGB RJM512037-002V02 7 7 7 7 B
N 38 10437153 WHITE KEY/DFA RJM512038-002V02 7 7 7 7 B
N 39 10437156 WHITE KEY/SC RJM512041-002V02 1 1 1 1 X

40 10341062 HAMMER UNIT/W1 TK-RJM509600*001 13 13 13 13 C

41 10341063 HAMMER UNIT/W2 TK-RJM509601*001 13 13 13 13 C

42 10341064 HAMMER UNIT/W3 TK-RJM509602*001 13 13 13 13 C

43 10341065 HAMMER UNIT/W4 TK-RJM509603*001 13 13 13 13 C

44 10341066 HAMMER UNIT/B1 TK-RJM509604*001 9 9 9 9 C

45 10341067 HAMMER UNIT/B2 TK-RJM509605*001 9 9 9 9 C

46 10341068 HAMMER UNIT/B3 TK-RJM509606*001 9 9 9 9 C

47 10341069 HAMMER UNIT/B4 TK-RJM509607*001 9 9 9 9 C

48 10427355 KEY SPACER/A RJM512181-001V01 1 1 1 1 X

49 10427356 KEY SPACER/B RJM512182-001V01 1 1 1 1 X

50 10427357 KEY SPACER/C RJM512183-001V01 1 1 1 1 X

51 10427358 KEY SPACER/D RJM512184-001V01 1 1 1 1 X

52 37195442 FLAT CABLE N30315B1B05-UL2896 1 1 1 1 X
N5310437600 RUBBER CONTACT/AG RJM512163-001V02 7777B

R RemarksN Item Code No. Parts Name Specification

– 64 –

1: AP-245_BLACK_DI

y

2: AP-245_BLACK_EU
3: AP-245_BLACK_UK
4: AP-245_BLACK_US

AP-245

Q't

1234

54 10431698 RUBBER CONTACT/AC RJM512164-001V01 1111C

55 10398226 FELT/LOWER LIMIT/BLACK KEY RJM510067-002V02 1111X

56 10398227 FELT/LOWER LIMIT/WHITE KEY RJM503562-002V02 1111X

57 10398219 FELT/UPPER LIMIT/HAMMER RJM511203-001V01 1111X

58 10294093 FELT/LOWER LIMIT/HAMMER TK-RJM507910*001 1111X

59 10388000 PLATE RJM510952-001V01 1111X

60 10343387 FABRIC TAPE/ACP RJM510100-001V01 1111X

MAIN CASE UNIT

61 10047599 FABRIC TAPE/10X100 M440710-1 1111X
N 62 10428360 PLASTIC BASE RJM512102-001V01 7777X
N 63 10431987 COVER NET RJM511985-001V01 2222X

N 64 10474441 SPEAKER CJ12FH01 2222X

N 65 10433023 CABLE HARNESS EF-EH2P060M922 1 1 1 1 X for Left speaker

66 10432675 CABLE HARNESS EF-EH2P065M922 1 1 1 1 X for Right speaker

67 10294355 SPEAKER NET RJM508336-001V01 2 2 2 2 X

N 67-1 10436098 FABRIC TAPE/15X40 RJM512618-001V01 4 4 4 4 X
N 67-2 10469354 SUPPORT BOARD RJM513244-001V01 1 1 1 1 X
N 67-3 10428640 BRACKET RJM512101-001V01 1 1 1 1 X

N 68 10433608 SIDE BOARD/LEFT TK-RJM511946*001 1 1 1 X

N 68 10499509 SIDE BOARD/LEFT TK-RJM511946*006 1 X

N 69 10433609 SIDE BOARD/RIGHT TK-RJM511947*001 1 1 1 X

N 69 10499511 SIDE BOARD/RIGHT TK-RJM511947*006 1 X

69-1 10305236 FABRIC TAPE/30X20 M411136-003V03 2 2 2 2 X

N 70 10429841 BRACKET RJM512118-001V01 2 2 2 2 X
N 71 10299259 PACKING RJM508522-001V01 2 2 2 2 X
N 72 10433589 SIDE RACK UNIT/LEFT TK-RJM511881*001 1 1 1 1 X
N 73 10433591 SIDE RACK UNIT/RIGHT TK-RJM511882*001 1 1 1 1 X
N 74 10427677 SCREW CAP RJM512119-001V01 2 2 2 2 X
N 75 69235860 FABRIC TAPE/3X10 M440216-1 2 2 2 2 X
N 76 10442262 DOUBLE FACED TAPE RJM512682-001V01 2 2 2 2 X
N 77 10427360 SIDE BLOCK/LEFT RJM511965-001V01 1 1 1 1 X
N 78 10427361 SIDE BLOCK/RIGHT RJM511966-001V01 1 1 1 1 X
N 79 10432627 CABLE HARNESS EF-SMP5P053M923 1 1 1 1 X for Pedal connector
N 80 10285212 DOWEL RJM508233-001V01 2222X

R RemarksN Item Code No. Parts Name Specification

– 65 –

1: AP-245_BLACK_DI

y

2: AP-245_BLACK_EU
3: AP-245_BLACK_UK
4: AP-245_BLACK_US

AP-245

Q't

1234

N 81 10430891 RUBBER FOOT RJM512247-001V01 2222X
N 82 10433558 FRONT BOARD UNIT TK-RJM511884*001 1 1 1 X

N 82 10499478 FRONT BOARD UNIT TK-RJM511884*005 1 X

N 83 10427678 BOX/PCB RJM511899-001V01 1111X
N 84 10459138 LABEL/RATING RJM504373-109V03 1111X

STAND

N 85 10431965 BACK BOARD RJM512032-001V01 1 1 1 X

N 85 10494279 BACK BOARD RJM512032-004V01 1 X

N 86 10433621 SIDE BOARD UNIT/LEFT TK-RJM512281*001 1 1 1 X

N 86 10499513 SIDE BOARD UNIT/LEFT TK-RJM512281*003 1 X

N 87 10433611 SIDE BOARD UNIT/RIGHT TK-RJM512282*001 1 1 1 X

N 87 10499515 SIDE BOARD UNIT/RIGHT TK-RJM512282*003 1 X

88 10348901 FOOT TK-RJM508370*003 2222X
N 89 10433612 PEDAL BOARD UNIT TK-RJM511855*001 1 1 1 X

N 89 10499517 PEDAL BOARD UNIT TK-RJM511855*004 1 X

N 90 10433626 PEDAL BOARD TK-RJM511873*001 1 1 1 X

N 90 10499519 PEDAL BOARD TK-RJM511873*004 1 X

91 10263906 PEDAL UNIT TK-RJM507377*001 1111X

92 10339497 CABLE HARNESS EF-SMR5P155MP5 1111Xfor Pedal unit

93 10260690 ADJUSTER FL-20-CR3-KE 1111X
N 94 10433624 SCREW SET TK-RJM511859*001 1111X

R RemarksN Item Code No. Parts Name Specification

ACCESSORIES

N - 10433613 STAND/MUSIC TK-RJM511858*001 1111C

- 10430927 AC ADAPTOR AD-A12150LW-F3B 1111Bwithout AC CORD

- 10361066 AC CORD UC2LT-M006A 1 1 X US type plug

- 10361067 AC CORD EC2LT-M002A 1 1 X EU type plug

- 10361068 AC CORD KC2LT-M002A 1 X Korea type plug

- 10361069 AC CORD AUC2LT-M002A 1 X Australia type plug

- 10361070 AC CORD BC2LT-M002A 1 X UK type plug

N - 10399509 SEAT/CHAIR MX-CH4D(SEAT)-B 1 1 X

- 10375602 FOOT/CHAIR MX-CH4D(FOOT) 4 4 X

– 66 –

MAIN PCB: M920-MDA1 (1/2)

(to CNA1/

CN601)

AP-245

SCHEMATIC DIAGRAMS

(to KYB1/CN803)

USB

(CN13)

(to Pedal Connector)

Not used

– 67 –

MAIN PCB: M920-MDA1 (2/2)

(to PSA1/

CN1)

AP-245

– 68 –

Not used

POWER & AMP PCB: M920-PSA1

DC 12 V (J2)

AP-245

(to LEFT SPEAKER)

(to RIGHT SPEAKER)

(to HPA1/

CN701)

(to MDA1/

CN16)

Not used

LEFT SPEAKER

RIGHT SPEAKER

– 69 –

CONSOLE PCB: M920-CNA1

(to CNA2/CN603)

AP-245

(to MDA1/CN1)

POWER SWITCH

– 70 –

CONSOLE PCB: M920-CNA2 CONSOLE PCB: M920-HPA1

(to CNA1/CN602)

POWER LAMP

AP-245

PHONES

(J701)

PHONES

(J702)

MAIN VOL.

(VR601)

– 71 –

(to PSA1/CN3)

Not used

PEDAL PCB: M332-PDA1 / M332-PDA2

AP-245

(to MDA1/CN8)

(to PDA2/CN3)

(to PDA1/CN2)

– 72 –

KEYBOARD PCB: M920-KYA1

AP-245

(to KYB1/CN802)

– 73 –

KEYBOARD PCB: M920-KYB1

AP-245

(to MDA1/CN3)

(to KYA1/CN801)

(to KYC1/CN805)

– 74 –

KEYBOARD PCB: M920-KYC1

(to KYB1/CN804)

AP-245

– 75 –

Ver. 1 : Dec. 2013

• Correction of the DISASSEMBLY (P17)

• Correction of the EXPLODED VIEW (P59)

• Correction of the PARTS LIST (P65)

Ver. 2 : Mar. 2014

• Correction of the EXPLODED VIEW (P59)

• Correction of the PARTS LIST (P65)

Ver. 3 : Jun. 2014

• Correction of the PARTS LIST (P63, P64)

Ver. 4 : Nov. 2014

• Correction of the PARTS LIST (P63, P65, P66)

CASIO COMPUTER CO., LTD.

CS Technical Department

TOKYO, JAPAN