Casio AP-38 Service Manual
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AP-38
SEP. 2002
AP-38
ELECTRONIC KEYBOARD
INDEX
Ver.2
Nov/ 2004

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Summary of Contents for Casio AP-38

  • Page 1 AP-38 SEP. 2002 AP-38 ELECTRONIC KEYBOARD INDEX Ver.2 Nov/ 2004...
  • Page 2: Table Of Contents

    CONTENTS Safety Notice ..................... 1 Specifications ....................2 Block Diagram....................3 Diagnostic Program..................4 Disassembly Instructions ................6 Circuit Description.................... 9 Printed Circuit Boards..................11 Exploded View ....................12 Parts List ......................15 Schematic Diagrams ..................18 SAFETY NOTICE CAUTION! Danger of explosion if battery is incorrectly replaced.
  • Page 3: Specifications

    • CELVIANO (without stand): approximately 39.0 kg (86.0 lbs) • CELVIANO: approximately 51.0 kg (112.4 lbs) • Design and specifications are subject to change without notice. • AP-38 has hardwired power cords. • AP-38V has detachable power cords. — 2 —...
  • Page 4: Block Diagram

    BLOCK DIAGRAM Keyboard FI0 ~ 10 SI0 ~ 10 KC0 ~ 7 IC 7 5VD0~7 Keyboard Controller MIDI IC 8 TC190C020AF 5VD8~15 LEDs Buttons LSI 1 PEDAL CA1 ~ 4 ANI0 ~ 2 M-IN M-OUT LR00 SW/LED CK00 Controller LR01 uPD65881GB (LSI301) 3VD0 ~ 15...
  • Page 5: Diagnostic Program

    DIAGNOSTIC PROGRAM Initial Setup 1. Connect an AC adaptor. 2. Connect a Sustain pedal. 3. Connect a MIDI cable (In-Out). 4. "Main" volume: MAX. 5. Turn the BRILLIANCE knob to the center. 6. Have the headphones ready. NOTE: If there is no pedal or MIDI cable, pedal or MIDI check can be skipped. How to start diagnostic program 1.
  • Page 6 5. PEDAL check 1 Press “CONTROL” button. A confirmation tone of C4, E4 and G4 sounds. 2 Press “DAMPER” PEDAL. A confirmation tone of C4 sounds. “RECORD” LED turns on. 3 Press “SOSTENUTE” PEDAL. A confirmation tone of E4 sounds. “SONG MEMORY”...
  • Page 7: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 1. Removal of top board 1-1. Remove 8 screws affixing the top board on the back. 1-2. Slide the top board forward and remove it from the main unit. Screws 2. Removal of keyboard cover 2-1. Lift up the keyboard cover full open position. 2-2.
  • Page 8 3. Removal of console panel 3-1. Remove 2 connectors. 3-2. Lift the console panel and turn it over and remove the power switch, which is affixed by 2 screws. Then remove the side panel. Caution: Be careful not to scratch the side panels. Screw Connectors Screw...
  • Page 9 6. Removal of keys 6-1. While plying the side partition plastics with tweezers, lift the edge of the key toward front. 7. Removal of keyboard PCB 7-1. Lay the keyboard so that keyboard PCBs face upward. 7-2. Remove screws on keyboard PCBs (10 screws on PCBs KY1M and KY3M, 12 screws on KY2M).
  • Page 10: Circuit Description

    CIRCUIT DESCRIPTION KEY MATRIX Second contact First contact HG52E35P A0 1 A0 # 1 B0 1 C1 1 C1 # 1 D1 1 D1 # 1 E1 1 A0 2 A0 # 2 B0 2 C1 2 C1 # 2 D1 2 D1 # 2 E1 2...
  • Page 11 BUTTON MATRIX Control Reverb Chorus Piano1 Piano2 Ele Piano1 Harpsichord Pipe Organ1 Sirings1 Synth Pad1 Acoustic Bass Variation Split Memory Record TrackA TrackB Start/stop Song Metronome LED MATRIX LDH0 LDH1 LDH2 LDH3 LDH4 LDH5 LDL0 Reverb Piano2 Pipe Organ1 Acoustic Bass Memory TrackB LDL1...
  • Page 12: Printed Circuit Boards

    PRINTED CIRCUIT BOARDS MAIN PCB JCM428-MA1M Top view Bottom view — 11 —...
  • Page 13: Exploded View

    EXPLODED VIEW CABINET 17 18 29 ~ 32 25 ~ 28 25 29 26 30 27 31 28 32 — 12 —...
  • Page 14 STAND — 13 —...
  • Page 15: Parts List

    PARTS LIST AP-38 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. Prices and specifications are subject to change with- out prior notice.
  • Page 16 Item Code No. Parts Name Specification Price Code R Remark MAIN PCB 1009 8415 PCB ASSY/M428-MA1M TK-RJM502154*001 LSI4,LSI5 1008 7835 D442012AGYBB55XMJH LSI2 1008 7836 MR27V6402G-0A3TP-N 1000 8350 PCM69BU/2K LSI1 2012 5987 TC190C020AF-001 LSI6 1008 7837 UPD703107AGJ133UEM LSI3 1005 4502 UPD914AGM-3ED 1004 7445 IC/MONOLITHIC NJM2068MD(T1)
  • Page 17 Item Code No. Parts Name Specification Price Code R Remark PS3M PCB 1009 8420 PCB ASSY/M428-PS3M TK-RJM502160*001 J404, J405 1004 7514 JACK/PHONE YKB22-5078 PS4M PCB 1009 8417 PCB ASSY/M428-PS4M TK-RJM502161*001 D400 2370 1417 SLP-135B-51 CONSOL PCB 1009 8418 PCB ASSY/M428-CN1M,CN2M RJM502165*001 LSI301 6932 4293...
  • Page 18 Item Code No. Parts Name Specification Price Code R Remark CONSOLE PANEL ASSY 1009 8421 CONSOLE PANEL ASSY TK-RJM502032*001 6924 5260 BUTTON/POWER M340318-1 1009 8419 POWER SWITCH ASSY TK-M341447*003V01 6919 3240 KNOB/SLIDE M311405-1 SW301-SW320 1004 7536 SWITCH/TACT SKQNAED010 6927 7140 TACT BUTTON 425 M340978-1 6927 7150...
  • Page 19: Schematic Diagrams

    SCHEMATIC DIAGRAMS MAIN PCB JCM428-MA1M — 18 —...
  • Page 20 I/O and POWER SUPPLY(120V) PCBs JCM428-PS2M/PS3M/PS4M — 19 —...
  • Page 21 I/O and POWER SUPPLY(230V) PCBs JCM428-PS2M/PS3M/PS4M — 20 —...
  • Page 22 CONSOLE PCBs JCM428-CN1M/CN2M — 21 —...
  • Page 23 KEYBOARD PCB JCM887T-KT1M — 22 —...
  • Page 24 KEYBOARD PCB JCM887T-KT2M — 23 —...
  • Page 25 KEYBOARD PCB JCM887T-KT3M — 24 —...
  • Page 26 Ver.1 : Sep. 2003 Addition of a diagnostic program item Ver.2 : Nov. 2004 Correction of the EXPLODEDE VIEW (page 12) and PART LIST (page 16) CASIO TECHNO CO.,LTD. Overseas Service Division 6-2, Hon-machi 1-Chome Shibuya-ku, Tokyo 151-8543, Japan...

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