Casio WK-3800 Service Manual
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Casio WK-3800 Service Manual

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WK-3800
JUL. 2006
WK-3800
ELECTRONIC KEYBOARD
INDEX

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  • Page 1 WK-3800 JUL. 2006 WK-3800 ELECTRONIC KEYBOARD INDEX...

  • Page 2: Table Of Contents

    CONTENTS SPECIFICATIONS ----------------------------------------------------------------------------------------- 1 BLOCK DIAGRAM ---------------------------------------------------------------------------------------- 3 CIRCUIT DESCRIPTION --------------------------------------------------------------------------------- 4 PRINTED CIRCUIT BOARD ---------------------------------------------------------------------------- 6 DISASSEMBLY --------------------------------------------------------------------------------------------11 DIAGNOSTIC PROGRAM ----------------------------------------------------------------------------- 17 EXPLODED VIEW --------------------------------------------------------------------------------------- 20 PARTS LIST ----------------------------------------------------------------------------------------------- 21 SCHEMATIC DIAGRAMS ----------------------------------------------------------------------------- 25...

  • Page 3: Specifications

    Rhythm Patterns: 182 (internal, 16 user areas* Tempo: Variable (226 steps, = 30 to 255) Chords: 3 fingering methods (CASIO CHORD, FINGERED, FULL RANGE CHORD) Rhythm Controller: START/STOP, INTRO/ENDING 1 and 2, VARIATION/FILL-IN 1 and 2, SYNCHRO/ FILL-IN NEXT Accomp Volume:...
  • Page 4 SMF Player: Flash memory storage for up to 200 files* Supported Format: SMF0 Flash Memory Capacity: 4MB* Shared Area: Approximately 3.5MB* (waveform data, accompaniment data, SMF data) Further storage of waveform, accompaniment, and SMF data becomes impossible after the total of such data reaches approximately 3.5MB. SD Memory Cards Supported SD Memory Cards: 1GB or less (Cards with capacity greater than 1 GB are not supported.) Functions:...

  • Page 5: Block Diagram

    BLOCK DIAGRAM SUB PCB (M740-PSA2) Phones/Output LCD Controller AC ADAPTOR ML9040-B02GA (IC401) Assingnable Jack DC 12V LINE OUT CONSOLE PCB (M740-CNA3) CONT DB0 ~ DB7 LCD PCB Speakers (M734-LCD1M) Power Amplifier Battery IC205, LA4636 D214 D201 Filter IC204, NJM2008D Power Supply Circuit Main Q201 ~ Q204, Volume...

  • Page 6: Circuit Description

    CIRCUIT DESCRIPTION KEY MATRIX F#11 G#11 A#11 F#12 G#12 A#12 C#21 D#21 F#21 C#22 D#22 F#22 G#21 A#21 C#31 G#22 A#22 C#32 D#31 F#31 G#31 A#31 D#32 F#32 G#32 A#32 C#41 D#41 F#41 C#42 D#42 F#42 G#41 A#41 C#51 G#42 A#42 C#52 D#51...
  • Page 7 BUTTON MATRIX FI10 LAYER SPLIT AUTO HARMONIZE – DEMO SWI0 SWI1 SWI2 SWI3 SWI4 SWI5 SWI6 SWI7 SYNCRO/ ACCOMP INTRO/ INTRO/ VARIATION/ VARIATION/ SWC0 TOUCH MODE FILL-IN VOLUME ENDING 1 ENDING 2 FILL-IN 1 FILL-IN 2 PRESET NEXT REGISTRATION/SONG MEMORY TRACK SONG TEMPO START/...

  • Page 8: Printed Circuit Board

    PRINTED CIRCUIT BOARD MAIN PCB M740-MDA1 Top View Bottom View — 6 —...
  • Page 9 SUB PCB M740-PSA1 Top View SUB PCB M740-PSA2 Top View — 7 —...
  • Page 10 DISPLAY PCB M734-LCD1M Top View — 8 —...
  • Page 11 CONSOLE PCB M740-CNA1 CONSOLE PCB M740-CNA2 CONSOLE PCB M740-CNA3 CONSOLE PCB M740-CNA4 CONSOLE PCB M740-CNA5 CONSOLE PCB M740-CNA6 — 9 —...
  • Page 12 KEYBORD PCB M764T-KY1M KEYBORD PCB M764T-KY2M — 10 —...

  • Page 13: Disassembly

    DISASSEMBLY I The Disassembly Procedure inscribed on this manual is the same as that of WK-3200 since WK-3800 has almost the same frame as WK-3200. Remove the battery cover and then the battery. 2. Remove 36 screws and then the upper case.
  • Page 14 4. Remove 5 screws, 5 connectors (JA, JB, JD, JE, JF) and then the PCB ASS'Y (MA1M). Connectors Connectors Screws 5. Remove 8 screws, 1 connector and then the LCD ASS'Y (LCD1M). Screws Connector Screws Note: Tighten the screws in the order from 1 to 8 when reassembling.
  • Page 15 6. Remove the volume knob, screws, connectors and then the CN1, CN2, CN3, CN4, CN5, CN6, CN7. Volume knob Screws Connector CN3M CN7M CN2M CN6M CN1M CN5M CN6M CN1M CN2M CN3M CN4M CN5M CN6M CN7M — 13 —...
  • Page 16 7. Remove 2 screws and then the Bender assy. Screws 8. Remove 29 screws and then the lower case. Note: Tighten the screw with the arrow mark in the figure first when reassembling. — 14 —...
  • Page 17 9. Remove 24 screws and then the PCB ASSY (KY1M, KY2M). 10.Remove the rubber keys. Projection Note: Pay attention to the positions of the rubber keys as one of them has a different length. Match the projections of the rubber keys with the holes of the lower case when reassembling. —...
  • Page 18 11.Remove 27 screws and then the white keys. Note: Pay attention to the positions of the screw holes when reassembling. 12.Remove the black keys. — 16 —...

  • Page 19: Diagnostic Program

    DIAGNOSTIC PROGRAM Initial Setup 1. Connect an AC adaptor. 2. Connect a Sustain pedal. 3. "Main" volume: MAX. NOTE: If there is no pedal or MIDI cable, pedal or MIDI check can be skipped. How to start diagnostic program 1. Press the “POWER” button while pressing the “Cursor key Up” and “Cursor key Down” buttons. 2.
  • Page 20 2. AC adaptor detection check. Message on LCD 1 Press “TONE” button. 1 ACJ ON 2 When the instrument detects that an AC adaptor is plugged in, an OK sound sounds. “ACJ OFF” appears and an NG sound sounds when the AC adaptor is not plugged (when batteries are used).
  • Page 21 11. LED check 1 Press “TEMPO ” button. 1 LED CHK 2 LEDs illuminate in the following order. FULL RANGE CHORD FINGERED CASIO CHORD DATA ACCESS DRAWBAR ORGAN 1 LED END 12.LCD check 1 Press “TEMPO ” button. 2 Turn on all segments of the LCD.

  • Page 22: Exploded View

    EXPLODED VIEW 29 30 31 42-4 42-2 42-3 42-1 — 20 —...

  • Page 23: Parts List

    PARTS LIST WK-3800 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 without prior notice.
  • Page 24 Price Item Code No. Part Name Specification Remarks Code Main PCB 10248139 PCB ASSY/MAIN TK-RJM507166*001 10197796 IC TA75S393F(TE85L.F) 10197802 IC TC74VHCT08AFT(EL. 10198126 MEMORY CY62128DV30LL70ZA 1 10241413 IC R1151N001C-TR-F 10197390 MEMORY LP62S2048AX70LLTF 10197555 IC TC7SZ14FU(TE85L.F) 4 IC8,9,21,22 10179619 IC TC7SZ04FU(TE85L.F) 2 IC12,24 10200257 LSI UPD914AGM-JED-A...
  • Page 25 P r i c e Code No. Part Name Specification Remarks I t e m Code Console PCB 10248142 PCB ASSY/CNA TK-RJM507170*001 CNA1~CNA6 IC301 10159709 LSI UPD65881GK-1019ETA Q301, 304, 305 10209017 TRANSISTOR KTA1267-GR-AT/P D305-322 10108141 DIODE 1SS133TP D302-304 10122219 LED 1154GD-B5/9-90 D301 10123009 LED...
  • Page 26 P r i c e Code No. Part Name Specification Remarks I t e m Code Case Unit 10200667 COVER/BATTERY TK-M341288*003 10247813 PLATE/DISPLAY RJM502476-008V01 10197775 KNOB/ROTARY M341109-005 10232704 SPEAKER C12JA28 10232702 SPEAKER C05JH60 10197776 LCD TR4194N 10122917 PLATE/BACK LIGHT RJM502475-001V01 10122970 FILM RJM502473-001V01 10081190 PIECE/TOP...

  • Page 27: Schematic Diagrams

    SCHEMATIC DIAGRAMS MAIN PCB M740-MDA1 (1/2) — 25 —...
  • Page 28 MAIN PCB M740-MDA1 (2/2) — 26 —...
  • Page 29 SUB PCBs M740-PSA1/PSA2 — 27 —...
  • Page 30 CONSOLE PCB M740-CNA1 — 28 —...
  • Page 31 CONSOLE PCBs M740-CNA2/CNA3/CNA4/CNA5/CNA6 — 29 —...
  • Page 32 DISPLAY PCB M734-LCD1M — 30 —...
  • Page 33 KEYBORD PCBs M764T-KY1M/KY2M — 31 —...
  • Page 34 CASIO COMPUTER CO.,LTD. Overseas Service Division 6-2, Hon-machi 1-Chome Shibuya-ku, Tokyo 151-8543, Japan...

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