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Casio AP-25 Service Manual

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

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  Summary of Contents for Casio AP-25

  • Page 1 AP-25/28 APR. 2001 AP-25/28 ELECTRONIC KEYBOARD INDEX...
  • Page 2: Table Of Contents

    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.
  • Page 3: Specifications

    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. — 2 —...
  • Page 4: Block Diagram

    BLOCK DIAGRAM MIDI Keyboard KC0 ~ 7 Keyboard PEDAL 3VD0 ~ 15 Controller TC190C020AF CA1 ~ 4 LSI 1 ANI0 ~ 2 M-IN M-OUT FI0 ~ 10 Reset IC SI0 ~ 10 RN5VD2BAA IC 13 3VD0 ~ 15 RAM (128KB) uPD703107AGJ103UEN CY62126BVLL-55ZI LSI 6...
  • Page 5: Replacement Of The Keyboard

    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.
  • Page 6 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.
  • Page 7: 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 8: Exploded View

    EXPLODED VIEW CABINET 18 19 — 7 —...
  • Page 9 STAND — 8 —...
  • Page 10: Parts List

    PARTS LIST AP-25/28 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 11 AP-25, AP-28 PARTS PRICE LIST Item Code No. Part Name Specification Q Price Code R Remarks Main PCB 1005 2246 PCB ASSY/M427-MA1M TK-M241553*1(M427) 3815 0679 BATTERY/LITHIUM CR2032/1HF1 2114 1218 IC/MONOLITHIC NJM2068MD(T1) IC10 2105 5824 IC/L-MOS TC7SH32FU(TE85L) IC11 2105 3773 IC/L-MOS...
  • Page 12 Item Code No. Part Name Specification Price Code R REMARKS PS12,PS3,PS4M PCB's 1005 4068 PCB ASSY/M437-PS1 TK-M341450*2(M427) B 120V area 1005 4069 PCB ASSY/M437-PS1 TK-M341450*3(M427) B 230V area 1005 2252 SWITCH ASSY/POWER TK-M341447*1(M427) 1005 2253 PCB ASSY/M427-PS3M TK-M341444*1(M427) 1005 2251 PCB ASSY/M427-PS4M TK-M341445*1(M427) 1005 2248 PCB ASSY/M427-PS5M TK-M341446*1(M427)
  • Page 13 1005 2238 FOOT SUB ASSY M341409A*2(M427) C Right 1005 2237 PEDAL-SUB ASSY M241584A*1(M427) C AP-28/3 Pedal 1005 4064 PEDAL-SUB ASSY M241584A*2(M427) C AP-25/2 Pedal 1005 2236 ST-SIDE SUB ASSY M341472*1(M427) C Left 1005 2235 ST-SIDE SUB ASSY M341472*2(M427) C Right 1005 2221 SCREW SET...
  • Page 14: Schematic Diagrams

    SCHEMATIC DIAGRAMS MAIN PCB JCM427-MA1M — 13 —...
  • Page 15 I/O and POWER SUPPLY(120 V) PCB JCM427-PS1/PS2M/PS3M/PS4M/PS5M — 14 —...
  • Page 16 I/O and POWER SUPPLY(230 V) PCB JCM427-PS1/PS2M/PS3M/PS4M/PS5M — 15 —...
  • Page 17 KEYBOARD PCB JCM887T-KT1M — 16 —...
  • Page 18 KEYBOARD PCB JCM887T-KT2M — 17 —...
  • Page 19 KEYBOARD PCB JCM887T-KT3M — 18 —...
  • Page 20 CASIO TECHNO CO.,LTD. Overseas Service Division Nishi-Shinjuku Kimuraya Bldg. 1F 5-25, Nishi-Shinjuku 7-Chome Shinjuku-ku, Tokyo 160-0023, Japan...

This manual is also suitable for:

Ap-28