Casio_AP-21_Service_Manual电路图.pdf

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1、ELECTRONIC KEYBOARD AP-21 MAY 1999 AP-21 RadioFans.CN 收音机爱 好者资料库 INDEX Ver. 1 SEP. / 2002 1 CONTENTS Safety Notice. 1 Specifications . 2 Block Diagram . 3 PCB Layout . 4 Disassembly Instructions . 5 Circuit Description . 8 Major Waveforms. 10 Troubleshooting . 11 Wiring Diagram . 14 Exploded View .

2、15 Parts List . 16 Schematic Diagrams . 19 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 manufacturers instructions. RadioFans.CN 收音机爱 好者资料库 2

3、SPECIFICATIONS GENERAL Number of keys:88 Polyphonic:32-note Preset tones:Piano-1, Piano-2, Electric Piano, Harpsichord, Vibraphone, Pipe Organ, Strings, Choir. Keyboard Controls:Touch sensitivity (Initial touch: Light/Middle/Heavy), Tuning curve (Standard/Electric piano/Flat), Baroque pitch (On/Off)

4、 Pedals:Soft/Sostenuto, Damper Effects:Reverb (Room, Stage, Hall-1, Hall-2), Chorus, Tremolo, Brilliance Transpose:F# - C - F Tuning control:A4 = 440Hz 50 cents Demonstration tunes:1: Polonais Hroque (F.F. Chopin)5: CASIO original 2: Frhlingslied Op. 62-6 (F. Mendelssohn)6: jesus, Bleibet Meine Freu

5、de (J.S. Bach) 3: CASIO original7: CASIO original 4: Harmonious blacksmith (G.F. Hndel)8: CASIO original Memory:Real-time recording Number of Songs: (A and B), Capacity: Approx. 3,000 notes total Backup Battery Built-in lithium battery: BR2330, Battery life: Approx. 5years Terminals:LINE IN Jack Inp

6、ut impedance: 30K, Sensitivity: 200mV LINE OUT Jack Out put impedance: 22K, Output voltage: 2.0V (rms) MAX, Phone Jack 6.3, stereo, MIDI jack (IN, OUT, THOUGH) Speakers:16cm dia. Approx. 20W input Rating: 2 pcs. Power source:AC source (120V, 230/240V) Power consumption:48W (120V AC), 62W (230/240V A

7、C) Dimensions:7-3/4 (H) 54 (W) 18 - 1/2 (D) 198mm (H) 1370mm (W) 470mm (D) Weight:36.4kg (80.3 lbs) /45.5kg (100.3 lbs) with stand C2# D2#C6# D6#G6#F6#A6#C7# D7# D2G7 G1# A0B0A2F1F2G1G2A1B1B2C1D1C6E1E2G6E6F6A6B6C7D6E7F7D7C2C8B7A7 A1#A2#G2#F1#F2#D1#C1#AD#A7#G7#F7# Nomenclature of keys RadioFans.CN 收音

8、机爱 好者资料库 3 BLOCK DIAGRAM Keyboard Pedal unit FI0FI10 SI0SI10 L1L18 KI0 KI3 KC0 KC7 Mute signal D0D7 SOLP SORP Reset signal VDD (+5V) AVDD (+5V) AVCC (+15V) AVFF (-15V) Mute signal IC 408 IC 411 Main volume BOK, WOK1 SOLM SOLM RD0RD15 RA0RA22 ED0 ED15 EA0 EA14 A0A14 A0A16 MIDI OUT INTHROUGH Damper SS

9、 SF P10, P12P16, P93, P94, P97 P70P77 P12P14 BRILLIANCE Key touch LSI LSI 10 HG52E35P CPU LSI 1 HD6435328RC13F LSI-S LSI 7 HG51B155FD-1 LSI4,5 UPD6376GS-E1 DAC DAC LPF LPF MIXER IC 406 Reset IC IC 5 Power supply circuit Power amp. IC 405 Sound Source Rom (3M-bit) LSI 6 MX23C2410MC-12CA58 System ROM

10、LSI 2 2M-bit LH532KU3 Effector RAM 256K-bit LSI 8, 9 TC55257DFL-70L Working strage LSI 3 SRAM 256K-bit TC55257DFL-70L LEDS Console Gate array LSI 301 UPD65005GF -419 KC0 KC4 4 PCB LAYOUT PCB Main PCB Sub PCB Console PCB Other PCBs JCM358- MA1M PS2M CN1M CN2M PS12 PS3M PS4M Components CPU, LSI-S, Sou

11、nd Source ROM Working storage RAM, Effect RAM Reset IC, DAC, Key Controller Filter, Lineout Amp., Power Amp. Power supply cir- cuit. MIDI input/output. LEDs, Buttons, Gate array Main Volume Fuse Head phone Jack Power lamp POWER VOLUME MINMAX TRANSPOSE/ TUNE/MIDI DIGITAL EFFECTCHORUS REVERB REVERB2 R

12、EVERB1 TONE PIANOE.PIANO HARPSI- CHORD PIPE ORGANSTRINGS SONG A SONG BRECORD START/ STOP DEMOMEMORY OFF ON ? MA1M PS2M PS12 PS3M PS4M CN1MCN2M KY1MKY2MKY3M 5 DISASSEMBLY INSTRUCTIONS 1. Removal of top board 1-1. Remove 6 screws affixing the top board on the back. 1-2. Slide the top board forward and

13、 remove it from the main unit. 2. Removal of keyboard cover 2-1. Lift up the keyboard cover full open position. 2-2. Unscrew the L-shaped stopper metal located on the inner left corner. 2-3. Lift up the keyboard cover gear from the opening where stopper metal is fixed then remove the keyboard cover.

14、 6 5. Removal of keyboard unit 5-1. Disconnect connector CA on the PCB MA1M. 5-2. Remove 23 screws that affix the keyboard unit (16 on the bottom of the case and 7 on the keyboard unit). 5-3. Lift and remove the keyboard unit. 4. Removal of front cover 4-1. Remove 6 screws from the front end of the

15、lower case. 4-2. Lift the front cover and remove the pilot lamp that is affixed by 2 screws. Then remove the front cover. 3. Removal of console panel 3-1. Remove screws affixing both ends of the console panel. 3-2. Disconnect connector CD on PCB MA1M, connector CF on PCB PS2M, and transformer ground

16、ing wire. 3-3. 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. Earth cableScrewConnector (CD)Connector (CD) screws Keyboard screws Front cover screws Bottom Keyboard scr

17、ews 7 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). 7

18、-3. Unsolder the cable. 8. Totes on replacing the main PCB. A lithium battery is set on the main PCB for memory protection. When you replace the main PCB, disconnect the jumper to open battery circuit. Since there is no jumper on a new main PCB, be sure to set a jumper. jumper 8 CIRCUIT DESCRIPTION

19、KEYMATRIX KC0KC1KC2KC3KC4KC5KC6KC7 FI0A0 1A0 # 1B0 1C1 1C1 # 1D1 1D1 # 1E1 1 SI0A0 2A0 # 2B0 2C1 2C1 # 2D1 2D1 # 2E1 2 EI1F1 1F1 # 1G1 1G1 # 1A1 1A1 # 1B1 1C2 1 SI1F1 2F1 # 2G1 2G1 # 2A1 2A1 # 2B1 2C2 2 FI2C2 # 1D2 1D2 # 1E2 1F2 1F2 # 1G2 1G2 # 1 SI2C2 # 2D2 2D2 # 2E2 2F2 2F2 # 2G2 2G2 # 2 FI3A2 1A2

20、 # 1B2 1C3 1C3 # 1D3 1D3 # 1E3 1 SI3A2 2A2 # 2B2 2C3 2C3 # 2D3 2D3 # 2E3 2 FI4F3 1F3 # 1G3 1G3 # 1A3 1A3 # 1B3 1C4 1 SI4F3 2F3 # 2G3 2G3 # 2A3 2A3 # 2B3 2C4 2 FI5C4 # 1D4 1D4 # 1E4 1F4 1F4 # 1G4 1G4 # 1 SI5C4 # 2D4 2D4 # 2E4 2F4 2F4 # 2G4 2G4 # 2 FI6A4 1A4 # 1B4 1C5 1C5 # 1D5 1D5 # 1E5 1 SI6A4 2A4 #

21、 2B4 2C5 2C5 # 2D5 2D5 # 2E5 2 FI7F5 1F5 # 1G5 1G5 # 1A5 1A5 # 1B5 1C6 1 SI7F5 2F5 # 2G5 2G5 # 2A5 2A5 # 2B5 2C6 2 FI8C6 # 1D6 1D6 # 1E6 1F6 1F6 # 1G6 1G6 # 1 SI8C6 # 2D6 2D6 # 2E6 2F6 2F6 # 2G6 2G6 # 2 FI9A6 1A6 # 1B6 1C7 1C7 # 1D7 1D7 # 1E7 1 SI9A6 2A6 # 2B6 2C7 2C7 # 2D7 2D7 # 2E7 2 FI10F7 1F7 #

22、1G7 1G7 # 1A7 1A7 # 1B7 1C8 1 SI10F7 2F7 # 2G7 2G7 # 2A7 2A7 # 2B7 2C8 2 FI KC SI LSI HG52E35P Second contactFirst contact 12 9 POWER SUPPLY CIRCUIT The power supply circuit generates five voltages as shown in the following table. NameVoltageFor operation of VDD+5 VCPU, Reset IC, DSP, Sound source R

23、OM, Working storage RAM, Effect RAM, Key touch LSI, Gute array, LEDs AVDD+5 VDAC AVCC+15 VFilter, Mixer AVFF -15 VFilter, Mixer 10 MAJOR WAVEFORMS 1 Filter output L-chCF connector pin 2 2 Filter output R-chCF connector pin 1 Tone : Piano 1 Key: A4 3 Key scan signal KC0CA connector pin 20 4 Key scan

24、signal KC1CA connector pin 19 5 Key scan signal KC2CA connector pin 18 6 Button scan signal L24UPD65005GF-419 pin 53 7 Button scan signal L25UPD65005GF-419 pin 54 8 Button scan signal L26UPD65005GF-419 pin 55 CH1 .2VCH2 .2V A 1ms CH1 CH2 1 2 CH1 5VCH2 5V CH3 5V A 20 s CH1 CH2 3 5 4 CH3 CH1 5VCH2 5V

25、A 2ms CH1 CH2 6 7 CH2 5V CH38 11 TROUBLESHOOTING 1.No power Check fuse F401. Is F401 blown up? Check fuses F402, F403, and F404. Are the fuses blown up? Are the voltages 21.6 V AC and 8.4 V AC? Is it OK? Is it OK? Measure output voltages of the transformer. Replace the transformer. No No Replace F40

26、1. Replace F402, F403, and F404. Yes Yes No No Yes Yes Yes Replace main PCB.No Replace the power switch. Set the voltage selector at proper position. Check position of voltage selector. Check the power switch. 12 2.No sound Does the power indicator light up? Check the main volume. Is it OK? Does the

27、 demo tune sound? Replace keyboard PCBs. Disconnect CA connectors on the main PCB. Follow No power troubleshooting. No Yes Yes Yes No No Replace main volume. Press Demo button. Replace the main PCB. Replace PS2M PCB. Is a sound ok? Yes No Replace MA1M PCB.End 3.Distorted sound 13 4.Certain keys do n

28、ot function 5.A certain key does not function Replace MA1M PCB. Do the keys function? Yes No Replace keyboard PCBs.End Clean the contact. Does the key function? Does the key function? Yes No No Replace the key contact rubber. Replace keyboard PCBs. End Yes 6.A certain button does not function Replac

29、e CN1M PCB. Does the button function? Yes No Replace MA1M PCB.End 14 WIRING DIAGRAM JCM425-MA1M JCM425-CN1M JCM425-CN1M JCM431-PS12 TRANSFORMER JCM887T-KY1MJCM887T-KY2MJCM887T-KY3M JCM425-PS2M JCM425-PS4M POWER LAMPSPEAKERS PHONES LEFT RIGHT POWER SWITCH JCM425-PS3M PEDAL UNIT CE-1 CE-2 CE-3 CE-4 CD

30、-1 CD-2 CD-3 CD-4 CD-5 CD-6 CD-7 CD-8 CD-9 CD-10 CD-11 CD-12 CD-13 CD-14 CD-15 DG VDD NRES NRD NWR CE A2 A1 A0 DB3 DB2 DB1 DB0 VDDB BRILLIANCE CD-1 CD-2 CD-3 CD-4 CD-5 CD-6 CD-7 CD-8 CD-9 CD-10 CD-11 CD-12 CD-13 CD-14 CD-15 CE-1 CE-2 CE-3 CE-4 SOFT SOSTENUTO DAMPER VDDB JX-1 JX-2 JX-3 JX-4 JX-5 JX-6

31、 JX-7 JX-8 JX-9 JX-10 JX-11 JX-12 JX-13 JX-14 JX-15 JX-16 JX-16 JX-15 JX-14 JX-13 JX-12 JX-11 JX-10 JX-9 JX-8 JX-7 JX-6 JX-5 JX-4 JX-3 JX-2 JX-1 JY-1 JY-2 JY-3 JY-4 JY-5 JY-6 JY-7 JY-8 JY-9 JY-10 JY-11 JY-12 JY-13 JY-14 JY-15 JY-16 JY-16 JY-15 JY-14 JY-13 JY-12 JY-11 JY-10 JY-9 JY-8 JY-7 JY-6 JY-5 J

32、Y-4 JY-3 JY-2 JY-1 FI0 SI0 FI1 SI1 FI2 SI2 FI3 SI3 KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7 FI10 SI10 FI9 SI9 FI8 SI8 FI7 SI7 KC7 KC6 KC5 KC4 KC3 KC2 KC1 KC0 CA1 CA2 CA3 CA4 CA5 CA6 CA7 CA8 CA9 CA10 CA11 CA12 CA13 CA14 CA15 CA16 CA17 CA18 CA19 CA20 CA21 CA22 CA23 CA24 CA25 CA26 CA27 CA28 CA29 CA30 CA1 CA2 CA

33、3 CA4 CA5 CA6 CA7 CA8 CA9 CA10 CA11 CA12 CA13 CA14 CA15 CA16 CA17 CA18 CA19 CA20 CA21 CA22 CA23 CA24 CA25 CA26 CA27 CA28 CA29 CA30 FI10 SI10 FI9 SI9 FI8 SI8 FI7 SI7 FI6 SI6 FI5 SI5 KC7 KC6 KC5 KC4 KC3 KC2 KC1 KC0 SI4 FI4 SI3 FI3 SI2 FI2 SI1 FI1 SI0 FI1 JJ1 JJ2 JJ3 JJ4 JJ5 VDDB BRILLIANCE AGB KC4 KI0

34、 JJ1 JJ2 JJ3 JJ4 JJ5 CC1 CC2 CC3 CC4 CC5 CC6 CC7 CC8 CC9 CC10 CC11 CC12 Rmei1 Rmel2 Lmel1 Lmel2 AG AVDD VDD DG MUTE Min Mout FG CC1 CC2 CC3 CC4 CC5 CC6 CC7 CC8 CC9 CC10 CC11 CC12 CF1 CF2 CF3 CF4 CF5 S1 S2 S3 S4 C RmelI (BROWN) LmelI (RED) AG (BLACK) Lmel0 (ORANGE) Rmel0 (YELLOW) CF1 CF2 CF3 CF4 CF5

35、L N CH1 CH2 LVD DG CH1 CH2 CG1 CG2 CG3 CG4 CG5 CG6 CG7 LVD DG AG LSP RSP RHP LHP CG1 CG2 CG3 CG4 CG5 CG6 CG7 CL1 CL2 CR1 CR2 LSP LSP+ RSP+ RSP 15 1 11 11 10 12 14 15 16 17 18 19 30 31 32 33 34 20 21 22 23 24 25 26 27 28 29 2 3 4 5 6 R-1 R-2 R-5 R-7 R-8 R-9 R-10 R-11 R-6 R-3 R-4 13 9 8 7 2 1 4 4 8 2

36、2 4 EXPLODED VIEW 16 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 with- out prior notice. 2.As for

37、spare parts order and supply, refer to the GUIDEBOOK for Spare parts Supply, published seperately. 3.The numbers in item column correspond to the same numbers in drawing. PARTS LIST AP-21 PARTS PRICE LIST AP-21 NItemCode No.Part NameSpecificationQPrice CodeRRemarks Main PCB BT13815 0794BATTERY / LIT

38、HIUMCR2032/1VC11AIB D1 - D42390 2576DIODE / SCHOTTKYRB501V-40TE-174ABB D52390 2576DIODE / SCHOTTKYRB501V-40TE-171ABB D62360 3057DIODE / ZENERUDZTE-173.3B1AAB IC12105 1120IC / L-MOSTC7S08F(TE85R)1ABB NIC22105 6657IC / C-MOSTC74HC10AF(TP1)1ABB IC32011 8806IC / C-MOSTC74HC04AF(TP1)1ACB IC52114 4060IC /

39、 MONOLITHICMB3771PF-EF1AKB LSI12011 5222LSIHD6435328RC13F1CBA LSI102011 5194LSIHG52E35P1BJA NLSI22012 6404LSILH532KU31ATA LSI3, LSI8 - LSI92012 5572LSITC55257DFL-70L(EL)3ASA LSI4 - LSI52114 4221LSIUPD6376GS-E12ASA LSI62012 5707LSIMX23C2410MC-12CA581BOA LSI72012 1316LSIHG51B155FD-11BUA Q1 - Q22250 11

40、62TRANSISTOR2SA1576AT106R2AAB Q32250 1162TRANSISTOR2SA1576AT106R1AAB Q42252 0637TRANSISTOR2SC4081T106R1AAB SNF13025 1505FILTER / EMINFM51R00P1061ACB X12590 2100OSCILLATORCSACS20.00MX040-TC1AGB X22590 1043OSCILATORAT-49-16.384M1AKB 16927 5470PCB ASSY / M425-MA1MM241032*11EMA Console PCB D301 - D31823

41、90 1344DIODE1SS133T-7718AAB NLED301 - LED3172370 1416LEDSLZ-190B-03-T217AAB LSI3012011 0812LSIUPD65005GF-4191ATA SW301 - SW3183412 0903SWITCH / TACTEVQ-21405R18AAA VR3012765 0280VOLUMEEWA-NAXCH1B141AIA VR3022765 2187VOLUMEEWA-NFECH1B541AGA 26927 5560PCB ASSY / M425-CN1,2MM241033*11DDA Power supply P

42、CB D401 - D404, D4152390 2996DIODE1SR139-400T-325AAB D405 - D4082390 3022DIODE3BZ41(LC6-15)4ADB D409 - D414 D417 - D421 2390 1344DIODE1SS133T-7711AAB D4162390 1323DIODERB100A-T32-T1ACB D422 - D4232360 1729DIODE / ZENERMTZJ5.1AT-77-T2AAB F4023632 0719FUSE / UL TIME-LAGUL-TSC-1A-N11AFAFor 110 - 127V a

43、rea F4023631 1037FUSE / TIME-LAG(S)T-1A1AEAFor 220 - 240V area F403 - F4043632 0301FUSE / UL TIME-LAGUL-TSC-4A-N12AFAFor 110 - 127V area F403 - F4043632 0049FUSE / TIME-LAG(S)T-4A2AFAFor 220 - 240V area IC4012114 5794IC / MONOLITHICNJM78M15FA1AEB IC4022114 5795IC / MONOLITHICNJM79M15FA1AGB IC4032114

44、 5797IC / MONOLITHICNJM78L05A(T3)1AEB IC4042114 5796IC / MONOLITHICNJM78M05FA1AEB IC4052114 1106IC / HYBRIDSTK4132MK21BLB IC406, IC408 IC410, IC411 2114 1799IC / MONOLITHICM5218APR4ACB IC4092114 1421IC / PHOTO COUPLERPC900V1AKB J401 - J4023612 0584JACKYKB21-50122ADA J403 - J4043612 0789JACKYKB21-501

45、02ACA J4053501 4816JACK / DINYKF51-50511AHB Q401 - Q4042254 0551FET2SK365-BL(TPE4)4ACA 36927 5520PCB ASSY / M425-PS2MM241035*2DNAFor 110 - 127V area 36927 5530PCB ASSY / M425-PS2MM241035*3DNAFor 220 - 240V area - 17 - NItemCode No.Part NameSpecificationQPrice CodeRRemarks PS12,PS3,PS4M PCBs F4013632

46、 0294FUSE / UL TIME-LAGMT4-2A-N11AFAFor 110 - 127V area F4013631 1037FUSE / TIME-LAG(S)T-1A1AEAFor 220 - 240V area NJ406 - J4073502 2657JACK / PHONEYKB22-50062AFA L4013013 2577COIL / CHOKEPLAC1522R0R01B11AMC NLED4012370 1417LEDSLP-135B-511AAB 46927 5490PCB ASSY / M425-PS12M341012*21BSBFor 110 - 127V area 46927 5500PCB ASSY / M425-PS12M341012*31BRBFor 220 - 240V area 56927 5540PCB ASSY / M425-PS3MM341013*11COB 66927 5580PCB ASSY / M425-PS4MM341014*11BJB Keyboard PCBs ND701 -