Casio CDP-120 Service Manual & Parts List

88-key piano keyboard
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CDP-120
JUL. 2011
CDP-120
ELECTRONIC KEYBOARD
Ver. 1 : Dec. 2012
INDEX

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  Summary of Contents for Casio CDP-120

  • Page 1 CDP-120 JUL. 2011 CDP-120 ELECTRONIC KEYBOARD Ver. 1 : Dec. 2012 INDEX...
  • Page 2 CDP-120 CONTENTS SPECIFICATIONS ................... 1 BLOCK AND WIRING DIAGRAM ..............2 PCB INFORMATION ..................3 CIRCUIT DESCRIPTION ................4 PRINTED CIRCUIT BOARDS ................. 6 DISASSEMBLY ....................9 DIAGNOSTIC PROGRAM ................25 EXPLODED VIEW ..................28 PARTS LIST ....................30 SCHEMATIC DIAGRAMS ................33...
  • Page 3: Specifications

    CDP-120 SPECIFICATIONS Keyboard 88-key piano keyboard Touch Response 3 types, Off Maximum Polyphony 48 notes (24 for certain tones) Tones Built-in Tones 5; with layer Reverb 1 to 10, Off Chorus 1 to 5, Off Demo Songs 5 songs (tone demo songs)
  • Page 4: Block And Wiring Diagram

    CDP-120 BLOCK AND WIRING DIAGRAM KEYBOARD PCB KEYBOARD PCB KEYBOARD PCB (M914-KYA1) (M914-KYB1) (M914-KYC1) CN801 (16 pin) CN802 (16 pin) CN804 (16 pin) CN805 (16 pin) CN803 (30 pin) MAIN PCB CN14 (30 pin) (M914-MDA1) FI0~FI10, SI0~SI10, KC0~KC7 CN19 (4 pin)
  • Page 5: Pcb Information

    CDP-120 PCB INFORMATION M914-PSA1 M914-MDA1 M914-KYA1 M914-KYB1 M914-KYC1 Classifi cation Parts Name PCB Name Components MPU, Flash Memory (64 Mbit), Main PCB PCB UNIT/MAIN M914-MDA1 Power Supply Circuit, Filter, USB Port Power Supply Circuit, Power Amplifi er Headphones Amplifi er, Power Switch,...
  • Page 6: First Contact

    CDP-120 CIRCUIT DESCRIPTION „ KEY MATRIX „ FI10 SI10 Each key has two contacts, the first contact and second contact NOTE: The diagram below illustrates how the contacts work. Second contact First contact   – 4 –...
  • Page 7 CDP-120 „ NOMENCLATURE OF KEYS „ F#3G#3 A#3 C#4D#4 F#4G#4A#4 C#5D#5 F#5G#5A#5 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 „...
  • Page 8: Printed Circuit Boards

    CDP-120 PRINTED CIRCUIT BOARDS Main PCB: M914-MDA1 Power Amp PCB: M914-PSA1 – 6 –...
  • Page 9 CDP-120 Keyboard PCB: M914-KYA1 Keyboard PCB: M914-KYB1 – 7 –...
  • Page 10 CDP-120 Keyboard PCB: M914-KYC1 – 8 –...
  • Page 11: Disassembly

    CDP-120 DISASSEMBLY „ CAUTION „ z The photos show a prototype. The appearance of the instrument, such as color, may „ differ from the actual model. z To avoid damages to the instrument and the floor, lay the instrument on a mattress „...
  • Page 12 CDP-120 „ DISASSEMBLY „ A. REMOVE THE PANEL UNITS Left panel unit Main panel unit Right panel unit A-1. Undo 10 or six screws on the bottom surface of the main unit. NOTE: To remove only the main panel unit, undo six screws indicated with red circles in the illustration below.
  • Page 13 CDP-120 A-4. Place the main unit with the keys facing up. A-5. Lift the main panel unit and turn it over. NOTE: The main panel unit is connected to the lower case unit with the connectors and FFC. Use caution when turn over the main panel unit.
  • Page 14 CDP-120 A-8. Undo three screws on the RIGHT-SIDE-CASE and then remove the RIGHT-SIDE-CASE. RIGHT-SIDE-CASE A-9. Undo three screws on the LEFT-SIDE-CASE and then remove the LEFT-SIDE-CASE. LEFT-SIDE-CASE – 12 –...
  • Page 15 CDP-120 A-10. Undo two screws on the RIGHT-SIDE-INNER-CASE and then remove the right panel unit. RIGHT-SIDE-INNER-CASE Right panel unit A-11. Undo two screws on the LEFT-SIDE-INNER-CASE and then remove the left panel unit. LEFT-SIDE-INNER-CASE Left panel unit – 13 –...
  • Page 16 CDP-120 B. REMOVE THE M914-MDA1 PCB (MAIN PCB) B-1. Remove two connectors. B-2. Undo four screws and then remove the M914-MDA1 PCB. M914-MDA1 PCB Connectors (M914-PSA1) C. REMOVE THE M914-PSA1 PCB (POWER AMP PCB) C-1. Remove the ROTARY-KNOB ROTARY-KNOB C-2. Remove two connectors from the M914-MDA1 PCB.
  • Page 17 CDP-120 D. REMOVE THE SPEAKER D-1. Unsolder two lead wires. D-2. Undo four screws and then remove the SPEAKER. <Left speaker> <Right speaker> Lead wire (Red) Lead wire (Black) Lead wire (Black) Lead wire (Red) E. REMOVE THE KY-ASSY E-1. Undo three screws and then remove the LEFT-SIDE-INNER-CASE.
  • Page 18 CDP-120 E-4. Undo three screws and then remove the KY-ASSY. KY-ASSY LOWER-CASE-UNIT – 16 –...
  • Page 19 CDP-120 „ DISASSEMBLY OF THE KY-ASSY „ A. REMOVE THE KEYS <Removing the keys> • To remove the keys, you will need two of the tools described below. • Before removing a black key, you must first remove both white keys on either side of the black key.
  • Page 20 CDP-120 A-1. Insert the two tools between the rib of the chassis and a key. A-2. When the tools are inserted to a certain depth, the key begins to be lifted and can then be removed. <Cross-section image> Tool Rib of the chassis...
  • Page 21 CDP-120 <Installing the keys> • Refer to the illustration below for the location of each white key. • Be sure to install each key at its designated location. • All black keys are the same. A black key may be installed at any correct black-key location.
  • Page 22 CDP-120 B. REMOVE THE HAMMERS B-1. Place the chassis upside down so that the hammers are visible. B-2. Press the chassis with the tip of tweezers. B-3. While catching a hammer with tweezers, set the tweezers against the resin part of the chassis.
  • Page 23 CDP-120 <Kinds of hammers> There are several kinds of hammers. The type of a hammer may be identified by the code engraved on it. Type of Hammer (for a white key) Hammer Code (for a white key) Type of Hammer (for a black key)
  • Page 24 CDP-120 <Installing the hammers> Be sure to install each hammer at its designated location. If a hammer does not move smoothly, check if it is installed at the correct location. Follow the same procedures shown below to install a hammer for both black and white keys.
  • Page 25 CDP-120 C. REMOVE THE M914-KYA1/KYB1/KYC1 PCBs (KEYBOARD PCB) C-1. Release the connector lock and remove the FFC. C-2. Remove 23 screws and then remove the M914-KYA1/KYB1/KYC1 PCBs. M914-KYA1 PCB M914-KYB1 PCB M914-KYC1 PCB C-3. Remove eight rubber contact strips. NOTE: One rubber contact strip is shorter than the others.
  • Page 26 CDP-120 <Installing the keyboard PCB (M914-KYA1/KYB1/KYC1)> (1) Connect the FFC to the M914-KYB1 PCB and lock the connector. NOTE: Insert it firmly and lock up. (2) Secure the M914-KYA1/KYB1/KYC1 PCBs with 23 screws. Press the PCBs lightly in the direction of the red arrow in the illustration below while tightening a screw.
  • Page 27: Diagnostic Program

    NOTE: Be sure to turn OFF the power when the test is finished. (2) Release the “FUNCTION”, “GRAND PIANO 2” and “HARPSICHORD” buttons (3) The diagnostic program starts and then CDP-120 enters in the root mode where it waits for test item selection.
  • Page 28 CDP-120 „ TEST PROCEDURES „ A. BUTTON CHECK A-1. Press the “FUNCTION” button to perform the “BUTTON CHECK”. A-2. Press the button in the order indicated in the illustration. NOTE: You cannot cancel this check procedure mid-way. <If the result passes>...
  • Page 29 CDP-120 D. PEDAL CHECK D-1. Press the “ELEC PIANO” button to select the “PEDAL CHECK”. D-2. Press the pedal. <If the result passes> The confirmation chord sounds. <If the result fails> The error tone sounds. D-3. Press the “STRINGS” button to return to the root mode.
  • Page 30: Exploded View

    CDP-120 EXPLODED VIEW KEYBOARD UNIT – 28 –...
  • Page 31 CDP-120 KEYBOARD UNIT – 29 –...
  • Page 32: Parts List

    1. Prices and specifications 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.
  • Page 33 CDP-120 1: CDP-120_BLACK_DI 2: CDP-120_BLACK_EU 3: CDP-120_BLACK_UK 4: CDP-120_BLACK_US Q'ty Price Item Code No. Parts Name Specification Remarks Code MAIN PCB 10399371 PCB UNIT/MAIN TK-RJM511112*001 A MDA1 CN19 10236624 CONNECTOR/USB UBR24-4K5G00 D6,D7 10009218 DIODE 1SS400TE61 10211950 IC NJM2068M-D(TE1) IC11 10137770 IC TC7S08FU(TE85L.F)
  • Page 34 CDP-120 1: CDP-120_BLACK_DI 2: CDP-120_BLACK_EU 3: CDP-120_BLACK_UK 4: CDP-120_BLACK_US Q'ty Price Item Code No. Parts Name Specification Remarks Code 10336108 CABLE UL2896-30-265-MACP 10398226 FELT/LOWER LIMIT/BLACK KEY RJM510067-002V02 10398227 FELT/LOWER LIMIT/WHITE KEY RJM503562-002V02 10398219 FELT/UPPER LIMIT/HAMMER RJM511203-001V01 10399793 FELT/LOWER LIMIT/HAMMER TK-RJM507910*001...
  • Page 35: Schematic Diagrams

    CDP-120 SCHEMATIC DIAGRAMS Main PCB: M914-MDA1 Not used (to PSA1/CN3) (to PSA1/CN4) (to KYB1/CN803) – 33 –...
  • Page 36 CDP-120 Power Amp PCB: M914-PSA1 DC 12 V IN (J3) PEDAL (J5) PHONES (J2) (to LEFT SPEAKER) (to RIGHT SPEAKER) (to MDA1/CN11) MAIN VOL. (VR1) POWER SWITCH (to MDA1/CN20) (SW1) LEFT SPEAKER RIGHT SPEAKER – 34 –...
  • Page 37 CDP-120 Keyboard PCB: M914-KYA1 (to KYB1/CN802) – 35 –...
  • Page 38 CDP-120 Keyboard PCB: M914-KYB1 (to KYA1/CN801) (to MDA1/CN14) (to KYC1/CN805) – 36 –...
  • Page 39 CDP-120 Keyboard PCB: M914-KYC1 (to KYB1/CN804) – 37 –...
  • Page 40 Ver. 1 : Dec. 2012 • Correction of the EXPLODED VIEW (P28) • Correction of the PARTS LIST (P32) CASIO COMPUTER CO.,LTD. Overseas Service Division 6-2, Hon-machi 1-Chome Shibuya-ku, Tokyo 151-8543, Japan...