Casio_AP-20_Service_Manual电路图.pdf

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1、ELECTRONIC KEYBOARD AP-20 (with price) RadioFans.CN 收音机爱 好者资料库 2 CONTENTS Safety Notice. 2 Specifications . 3 Block Diagram . 4 PCB Layout . 5 Disassembly Instructions . 6 Circuit Description . 10 Major Waveforms. 12 Troubleshooting . 13 Wiring Diagram . 17 Exploded View . 18 Parts List . 21 Schemat

2、ic Diagrams . 23 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 3 SPECIFICATIONS GENERAL Num

3、ber of keys88 Polyphonic:32-note Preset tones:10, PIANO 1, PIANO 2, ELEC. PIANO, HARPSICHORD, VIBRAPHONE, PIPE ORGAN, STRINGS, CHOIR, W.BASS (Lower tone only), E.BASS (Lower tone only) Layer/Split function Key transpose:F#-C-F Keyboard controls:Tuning curve, Baroque pitch Temperaments:Equal Temperam

4、ent, Kirnberger III, Werckmeister, Mean-Tone, Just Intonation (Minor/Major), Pythagorean System Effects:Reverb (Room, Stage, Hall 1, Hall 2)/Chorus/Tremolo/Brilliance Demo tunes:8,1. Polonaise Hroque (F.F. Chopin) 2. Frhlingslied Op. 62-6 (F. Mendelssohn) 3. CASIO original 4. Harmonious blacksmith (

5、G.F. Hndel) 5. CASIO original 6. Jesus, Bleibet Meine Freude (J.S. Bach) 7. CASIO original 8. CASIO original Memory:Number of Songs:2 (A and B) System:Real-time recording Memory Capacity:Approximately 3,000 notes total Memory Backup Battery:Built-in lithium battery Battery Life: Approximately 5 year

6、s Pedals:Soft, Sostenuto, Damper Tuning control:440Hz 50 cents Built-In Speakers:16 cm dia. x 2 (Output: approx. 20 W + 20 W) MIDI:16-channel, multi-timbral reception Terminals:PHONES 1 and 2, MIDI (IN/OUT/THRU), LINE OUT L and R (Output Imped- ance: 10 K; Output Voltage: 2 V, RMS, max.), LINE IN R

7、and L (Input Imped- ance: 20 K, Input sensitivity: 200 mV) Power source:120V (for U.S.A.), 120V, 220V, 230V and 240V (for other countries) Power consumption:65W (with 120V AC), 55W (with 220V, 230V and 240V AC) Dimensions (HWD):Without stand: 185 1340 520 mm (7-5/16 52-13/16 20-1/2 inches) With stan

8、d:820 1360 550 mm (32-5/16 53-9/16 21-11/16 inches) Weight:Without stand: 35.5 kg (78.3 lbs)/38.5 kg (84.0 lbs) With stand:45.5 kg (100.4 lbs)/48.5 kg (106.1 lbs) Note: There are two models of AP-20, one has a keyboard cover, the other has no keyboard cover. RadioFans.CN 收音机爱 好者资料库 4 DSP HG51B155FD

9、RAM 256K HM62256BLP-10 ROM 1M MX23C1010PC- 12CA25 CPU HD6435328RC13F PEDAL MIDI INOUT ROM 8M + 16M HN62418PD25 HN624116D44 RAM 256K 2 HM65256BLSP- 10 2 Keyboard Controller HG52E35P Switch & LED Controller PD65005GF-419 D/A Converter PD6376CX D/A Converter PD6376CX Filter Mixer, Mute Circuit T6, T7,

10、T10, T11 Power Amp. STK4132MK RA0 19 RD0 15 EA0 14 ED0 15 A0 3 A0 14 D0 7 KC0 4 KI0 3 L1 9 LA JLEDs Switches Keyboard KC0 7 FI0 10 SI0 10 Main Volume Voltage Regulator M5F78M12L 2 M527BL05 T8, T9 AVCC AVDD AVFF VDD +12V +5V 12V +5V SOLM, SOLPBDK, WOK1, SORM, SORP Power Switch Power Transformer T101

11、Reset IC MB3771P RST MUTE BRILLIANCE MIDIMIDO SF SS DP Filter LINE IN P70 P77 P12 P14 BLOCK DIAGRAM 5 POWER VOLUME MINMAX HALL 2 BRILLIANCE MELLOWBRIGHT CONTROL PIANO 1 TONE PIANO 2E.PIANOHARPSICHORDPIPE ORGANSTRINGSCHOIRVIBRAPHONEW.BASSE.BASS LOWER TONE REVERB HALL 1 STAGE ROOM TREMOLO CHORUS SONG

12、A MEMORY SONG BRECORD START/ STOP TUNEDEMO OFF ON MA2M MA1M PS1 CN2MCN1MCN3M IF1M MA4M MA5M TP10-KY1MTP10-KY2M PCB LAYOUT Note: IF1M PCB is a terminal board for the keyboard PCBs, and included in the main PCB. PCB Main PCB Jack PCBs Console PCBs Power PCB JCM433- MA1M MA2M MA4M MA5M CN1M CN2M CN3M P

13、S1 Components CPU, DSP, Sound Source ROM Working storage RAM, Effect RAM Reset IC, DAC, Filter, Key con- troller, Power amp, Power supply circuit LINE IN/OUT jack, MIDI jacks Phone jacks Power indicator Gate array (Button controller/LED driver), LEDs, Buttons Main Volume, Brilliance volume Tune Butt

14、ons, Demo button Fuse, Noise filter 6 DISASSEMBLY INSTRUCTIONS 1. Disassembling top board 1-1. Remove 8 screws on the rear. 1-2. Slide the top board towards the rear. The top board will be free from catches on the case. 1-3. Lift the top board. For keyboard-cover model 2. Disassembling keyboard cove

15、r 2-1. Slide the keyboard cover to open fully. 2-2. Passing the gear into the opening on each rack, lift the keyboard cover. For no-keyboard-cover model 2. Disassembling the front cover 2-1. Remove 4 screws at both ends of the front cover. 2-2. Remove the front cover. 7 3. Disassembling console pane

16、l Note: To avoid scratch on the side board, put paper between the console panel and the side board at both ends. 3-1. The console panel is fixed with screws and nuts. Holding the nut, remove the screw. 3-2. Remove the screw fixing a grounding wire at the transformer. 3-3. Slide the console panel tow

17、ards the front to free from catches. 3-4. Turn round the console panel. 3-5. Remove the 2 screws fixing the power switch. Insert paper here. Insert paper here. 4. Disassembling front cover 4-1. Remove 5 screws at the front edge on the bottom. 4-2. Disconnect the connector for phone jacks from the ma

18、in PCB. 4-3. Watching the phone-jack cable, pull out the front cover towards the front. 8 5. Disassembling keyboard unit 5-1. Remove 6 screws at both ends on the bottom, and a screw at the middle. 5-2. Remove 2 screws at both ends of keyboard unit. 5-3. Disconnect 2 connectors for the keyboard unit

19、from the main PCB. 5-4. Moving the keyboard unit towards the front, remove the unit from the case. 6. Disassembling keys 6-1. Peel the red felt and sponges off the keyboard unit. 6-2. Using a long-nose plier, remove key springs. 6-3. Pressing the hook with a long-nose plier. Lift the key. 9 7. Disas

20、sembling keyboard PCBs 7-1. Turn round the keyboard unit to face the PCB up. 7-2. Disconnect the connector at the middle of keyboard. 7-3. Remove screws on the keyboard PCBs. Jumper 8. Replacing the main PCB Note: The main PCB contains a lithium battery for memory back-up. Please remove the jumper b

21、efore replacing the PCB. And make sure that the jumper is reset on new main PCB after replacing the PCB. Because no jumper is set on a spare part of the main PCB. 10 CIRCUIT DESCRIPTION KEYMATRIX KC0KC1KC2KC3KC4KC5KC6KC7 FI0A0 1A0 # 1B0 1C1 1C1 # 1D1 1D1 # 1E1 1 SI0A0 2A0 # 2B0 2C1 2C1 # 2D1 2D1 # 2

22、E1 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 # 1B2 1C3 1C3 # 1D3 1D3 # 1E3 1 SI3A2 2A2 # 2B2 2C3 2C3 # 2D3 2D3 # 2E3 2 FI4F3 1F3 # 1G3 1G3 # 1A3 1A3 # 1B3 1C4

23、 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 # 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

24、 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 # 1G7 1G7 # 1A7 1A7 # 1B7 1C8 1 SI10F7 2F7 # 2G7 2G7 # 2A7 2A7 # 2B7 2C8 2 FI KC SI LSI UPD912GF-3BA Second contactF

25、irst contact 11 KI0KI1KI2KI3 KO0Piano2E. PianoHarpsichordW. Bass KO1Piano1StringsChoirE. Bass KO2VibraphonePipe organReverb KO3Song ASong BRecordStart/Stop KO4ControlTune upTune downDemo BUTTON MATRIX POWER SUPPLY CIRCUIT The power supply circuit generates four voltages as shown in the following tab

26、le. NameVoltageFor operation of VDD+5 VCPU, Reset IC, Working storage RAM, DSP, Key touch LSI, Sound source ROM, Effect RAM, Gate array AVDD+5 VDAC AVCC+12 VFilter, Mixer AVFF-12 VFilter, Mixer 12 MAJOR WAVEFORMS CH1 .2VCH2 .2V A 1ms CH1 CH2 1 2 1 Filter output L-chCC connector pin 1 2 Filter output

27、 R-chCC connector pin 2 6 Button scan signal KC0UPD65005GF-419 pin 53 7 Button scan signal KC1UPD65005GF-419 pin 54 8 Button scan signal KC2UPD65005GF-419 pin 55 CH1 5VCH2 5V A 2ms CH1 CH2 6 7 CH2 5V CH38 Tone : Piano 1 Key: A4 3 Key scan signal KC0JA connector pin 5 4 Key scan signal KC1JA connecto

28、r pin 4 5 Key scan signal KC2JA connector pin 3 CH1 5VCH2 5V CH3 5V A 20 s CH1 CH2 3 5 4 CH3 13 Check fuse F101. Is F101 blown up? Check fuses F2, F3, and F4. Are the fuses blown up? Are the voltages 40 V AC and 8 V AC? Is it OK? Is it OK? Measure output voltages of the transformer. Replace the tran

29、sformer. No No Replace F101. Replace F2, F3, and F4. 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. TROUBLESHOOTING 1.No power 14 Does the power indicator light up? Check

30、 the main volume. Is it OK? Does the demo tune sound? Replace keyboard PCBs. Disconnect JA and JB 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. 2.No sound 3.Distorted sound Check the voltage selector. I

31、s it at proper position? No Yes Replace the main PCB. Set the voltage selector at proper position. 15 4.Certain keys do not function 5.A certain key does not function Clean the contact. Does the key function? Does the key function? Yes No No Replace the key contact rubber. Replace keyboard PCBs. End

32、 Yes Does the key function? Replace the main PCB. Yes No Replace the main PCB. Do the keys function? Yes No Replace keyboard PCBs.End 16 Replace the console PCBs. Does the button function? Yes No Replace MA1M PCB.End 6.A certain button does not function 17 JCM433-MA1M KC4 KC3 KC2 KC1 KC0 SI4 FI4 SI3

33、 FI3 SI2 FI2 SI1 FI1 SI0 FI0 SI10 FI10 SI9 FI9 SI8 FI8 SI7 FI7 SI6 FI6 SI5 FI5 KC7 KC6 KC5 JA-1 JA-2 JA-3 JA-4 JA-5 JA-6 JA-7 JA-8 JA-9 JA-10 JA-11 JA-12 JA-13 JA-14 JA-15 SI0 KC0 FI0 KC1 SI1 KC2 FI1 KC3 SI2 KC4 FI2 KC5 SI3 KC6 FI3 KC7 SI4 NC FI4 NC JA-1 JA-2 JA-3 JA-4 JA-5 JA-6 JA-7 JA-8 JA-9 JA-10

34、 JA-11 JA-12 JA-13 JA-14 JA-15 JB-1 JB-2 JB-3 JB-4 JB-5 JB-6 JB-7 JB-8 JB-9 JB-10 JB-11 JB-12 JB-13 JB-14 JB-15 JB-1 JB-2 JB-3 JB-4 JB-5 JB-6 JB-7 JB-8 JB-9 JB-10 JB-11 JB-12 JB-13 JB-14 JB-15 CA-1 CA-2 CA-3 CA-4 CA-5 CA-6 CA-7 CA-8 CA-9 CA-10 CA-11 CA-12 CA-13 CA-14 CA-15 CA-16 CA-17 CA-18 CA-19 CA

35、-20 CA-1 CA-2 CA-3 CA-4 CA-5 CA-6 CA-7 CA-8 CA-9 CA-10 CA-11 CA-12 CA-13 CA-14 CA-15 CA-16 CA-17 CA-18 CA-19 CA-20 SI5 KC0 FI5 KC1 SI6 KC2 FI6 KC3 SI7 KC4 FI7 KC5 SI8 KC6 FI8 KC7 SI9 FI10 FI9 SI10 CB-1 CB-2 CB-3 CB-4 CB-5 CB-6 CB-7 CB-8 CB-9 CB-10 CB-11 CB-12 CB-13 CB-14 CB-15 CB-16 CB-17 CB-18 CB-1

36、9 CB-20 CB-1 CB-2 CB-3 CB-4 CB-5 CB-6 CB-7 CB-8 CB-9 CB-10 CB-11 CB-12 CB-13 CB-14 CB-15 CB-16 CB-17 CB-18 CB-19 CB-20 AGB BRILLIANCE AVDDB DB0 DB1 DB2 DB3 A0 A1 A2 CE NRD NWR NRES CF-1 CF-2 CF-3 CF-4 CF-5 CF-6 CF-7 CF-8 CF-9 CF-10 CF-11 CF-12 CF-13 CF-14 CF-15 CF-16 CF-1 CF-2 CF-3 CF-4 CF-5 CF-6 CF

37、-7 CF-8 CF-9 CF-10 CF-11 CF-12 CF-13 CF-14 CF-15 CF-16 TVOL TVOR AG TVRL TVRR CE-BR CE-R CE-E CE-O CE-Y CE-1 CE-2 CE-3 CE-4 CE-5 GY BK PP BR O GR CU-1 CU-2 CU-3 CU-4 CU-5 GR CR-1 CR-2 CR-3 CS-1 CS-2 CS-3 + NC + NC JCM433-MA2M JCM433-MA4M Power Transformer JCM433-PS1 JCM433-IF1MTP8/10 KY1 JCM433-CN3M

38、 TP8/10 KY2 Pedal Unit JCM433-CN1M JCM433-CN2M Y BL W R CV-1 CV-2 CV-3 CV-4 CV-1 CV-2 CV-3 CV-4 Voltage Selector KI0 KC4 AVDDB BRILLIANCE AGB JX-1 JX-2 JX-3 JX-4 JX-5 JX-1 JX-2 JX-3 JX-4 JX-5 SF SS DP AVDDP SOFT SOSTE DAMP COMMON CD-1 CD-2 CD-3 CD-4 CT-1 CT-2 CT-3 CT-4 CT-5 CT-6 CT-7 CT-8 CT-9 KC7 N

39、C FI4 SI4 1 2 3 4 1 2 3 4 CT-1 CT-2 CT-3 CT-4 CT-5 CT-6 CT-7 CT-8 CT-9 PHONES KC4 KI3 KI2 KI1 JY-1 JY-2 JY-3 JY-4 JY-1 JY-2 JY-3 JY-4 MID0 MID1 VDD DG AG FG AG AVFF AVCC LIR AG LIL LOR AG LOL CC-1 CC-2 CC-3 CC-4 CC-5 CC-6 CC-7 CC-8 CC-9 CC-10 CC-11 CC-12 CC-13 CC-14 CC-15 CC-1 CC-2 CC-3 CC-4 CC-5 CC

40、-6 CC-7 CC-8 CC-9 CC-10 CC-11 CC-12 CC-13 CC-14 CC-15 RLRLINOUT THRU LINE INLINE OUTMIDI NC BK C-1 C-2 WIRING DIAGRAM 18 EXPLODED VIEW STAND x12 x4 x4 x4 x1 x2 x4 x4 R-8R-9 R-10 R-11 R-12 W X 19 30 1 2 3 4 5 6 7 8 9 R-2 R-5 R-3 R-6 R-4 R-7 R-1 10 1113 14 15 16 1217 18 17 18 19 20 21 25 24 26 26 27 2

41、9 31 22 23 28 32 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 spar

42、e 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-20 FOB Japan NItemCode No.Parts NameSpecificationQ N.R.YenR Unit Price Main PCB 2200 4409Transistor2SA933-SQ-TP-T 38B 2

43、220 1387Transistor2SC1740SQ-TP-T 28B 2240 1050FET2SK163N-T 431B 2360 0273Zener diodeRD3.3ESB1-T1-T 18B 2360 1694Zener diodeRD6.2ESB1-T1-T 18A 2011 0455LSI, RAMHM65256BLSP-10 2450A 2011 3325LSI, DACUPD6376CX 2190A 2011 5194LSI, Key controllerHG52E35P 1540A 2011 5208LSI, ROM, Sound sourceHN624116PD44

44、11,260A 2011 5222LSI, CPUHD6435328RC13F 11,260A 2011 5236LSI, ROM, Sound sourceHN62418PD25 1870A 2011 7434LSI, DSPHG51B155FD11,160A N2012 0560LSI, RAMHM62256BLP-10.8 1600A 2012 2093LSI, ROMMX23C1010PC-12CA251290A 2101 0731IC, NADD gateTC74HC10AP 132B 2105 1092IC, NOT gateTC74HC04AP130B 2114 0021IC,

45、OP-amp.LA6462D 539B 2114 0140IC, ResetMB3771P 190B 2114 0854IC, RegulatorM5278L05 178A 2114 1106IC, Hybrid, Power amp.STK4132MK2 1650A 2114 1113IC, RegulatorM5F78M12L 191A 2114 2163IC, RegulatorM5F79M12L 178A 2230 5229Transistor2SD1666R,S 160A 2390 2366Diode stackS4VB20-4033(L10) 1190B 2529 2034Cera

46、mic oscillatorCSA20.00MX040 152B 2590 1519Crystal oscillatorHC-49U16384 1100B 3815 0707Lithium batteryCR2032-1HM 196B 3631 1070Fuse, Time-lag(S)T-3.15A139A 3631 1045Fuse, Time-lag(S)T-1.6A162A 3632 0231Fuse, Time-lagUL-TSC-3.15A-N1161A 3632 0273Fuse, Time-lagUL-TSC-1.6A-N1161A N16924 7790Main PCB assy M433-MA1MM140334*2 114,470A Sub PCB 2105 1092IC, NOT gateTC74HC04