Casio_CT-870_Service_Manual电路图.pdf

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1、ELECTRONIC KEYBOARD CT-870 CT-870 V O L U M E SLOWFAST MELODY CONTROLLER PORTAMENTO SPLITLAYERRHYTHMTONE MULTI FUNCTION DISPLAY MAIN? VOLUME FULL RANGE? CHORD FINGERED CASIO? CHORD MAX MIN MODEPOWERREVERB STAGE HALL ROOM 456 123 REGISTRATION SAVE ACCOMP? VOLUME TEMPONORMAL/? VARIATION? ? INTRO/? FIL

2、L-IN SYNCHRO/? ENDING START/? STOP 123 456 789 0?|? ? DEMO TRANSPOSE/? TUNE/MIDI SONG? MEMORY TOUCH? RESPONSE 100? TONES 100? RHYTHMS PIANO 00PIANO 01HARD PIANO 02STUDIO PIANO 03HONKY-TONK 04ELEC PIANO 1 05ELEC PIANO 2 06ELEC PIANO 3 07CHORUSED EP 08HARPSICHORD 09CLAVELECTRO 10MUSIC BOX 11VIBRAPHONE

3、 12MARIMBA 13THUMB PIANO ORGAN 14ELEC ORGAN 1 15ELEC ORGAN 2 16ELEC ORGAN 3 17JAZZ ORGAN 18ROCK ORGAN 1 20CHURCH ORGAN 21ACCORDION 22BANDONEON 23REED ORGAN 24HARMONICA 25GUT GUITAR 26ACOUS GUITAR 27JAZZ GUITAR 28ELEC GUITAR 29MUTE GUITAR 30DIST GUITAR 31HARP 32BANJO 33WOOD BASS 19ROCK ORGAN 2 34ELEC

4、 BASS 1 35ELEC BASS 2 36FRETLESS BASS 37SLAP BASS 38SYNTH-BASS 1 39SYNTH-BASS 2 ORCHESTRA/ENS 40VIOLIN 41CELLO 42PIZZICATO STR 43TIMPANI 44ORCHESTRA HIT 45STRINGS 1 46STRINGS 2 47SYNTH-STR 1 48SYNTH-STR 2 49CHOIR 50SYNTH-VOICE BRASS 51TRUMPET 52TROMBONE 53TUBA 54MUTE TRUMPET 55FRENCH HORN 56BRASS RE

5、ED/PIPE 57SYNTH-BRASS 58SOPRANO SAX 60TENOR SAX 61BARITONE SAX 62OBOE 63CLARINET 64PICCOLO 65FLUTE 66RECORDER 67PAN FLUTE 68WHISTLE SYNTH-LEAD 69SYNTH-LEAD 1 70SYNTH-LEAD 2 71SYNTH-LEAD 3 72CALLIOPE 73POWER LEAD 74FIFTH LEAD 75BASS+LEAD 76BOTTLE LEAD 77FANTASY 78WARM PAD 80SPACE CHORUS 81GLASS HARMO

6、NICA 82COUNTRY FARM 83POWER STRINGS 84DREAM PAD 85PEARL DROP 86SOUNDTRACK 87CRYSTAL 88ATMOSPHERE ORIENTAL 89COSMIC SOUND 90SPACE 91SYNTH-SFX 92ERHU 93ZHENG 94YANG QIN 95DIZI 96SHENG PERCUSSION 97PERCUSSION 1 98PERCUSSION 2 99PERCUSSION 3 CHROMATIC PERC GUITAR/BASS 59ALTO SAX79SYNTH-ENS SYNTH-PAD POP

7、S I 00NICE GROOVE 01POPS 1 02BALLAD 03POP BALLAD 04GROOVE POP 05RAP POP 06POP REGGAE 07SOUL BALLAD 08POPS 2 09POP WALTZ 1016 BEAT 1 1116 BEAT 2 1216 BEAT 3 138 BEAT 1 148 BEAT 2 158 BEAT 3 16POPS 3 17POPS 4 18POP FUSION 20ROCK WALTZ 21SLOW ROCK 1 22SLOW ROCK 2 23SOFT ROCK 1 24SOFT ROCK 2 25FOLKIE PO

8、P 26POP ROCK 2760s SOUL 28FOLK ROCK 29 30ROCK 1 31ROCK 2 32ROCK 3 33RIFF ROCK 34HEAVY METAL 3550s ROCK 36TWIST 37NAWLINS R the CPU can read rhythm data simultaneously when a rhythm pattern is selected. Then the CPU provides 16-bit serial sound data to the DSP. The CPU also controls MIDI input/output

9、 and stores sequencer data into the working storage RAM. The following table shows the pin functions of LSI101. 7 Sound data and ? timing signals MIDI input/output KC0 KC7 FI0 FI10, SI0 SI7? KI0 KI2 Sustain signal Modulation Pitch bend RCEB DSP? ? LSI102 RESB WEB CE1B CE RAM? ? LSI103 OEOE WE MWEB M

10、RDB MRDB MCSB2 MWNB PLE CPU? ? LSI101 NMI RSTB XLT0/XLT1 SCK0 P17 Reset ICPG 20MHz Power ON signal APO cancel signal APO MA0 MA19 MD0 MD15 MA0 MA10MA0/MA1 MD0 MD7 ROM? ? LSI104 CE MCSB0 SCK1? BCK? SO? LRCK? TXDO? RXDO? ? ? ? ? ? ? SI9? AN1? AN0 Pin No.TerminalIn/OutFunction 80VCCIn +5 V source 81GND

11、In Ground (0 V) source 82MRDBOut Read enable signal output 83 98MD0 MD15In/Out Data bus 99PLEOut Reset signal output for the DSP 100P17In APO cancellation signal input CPU Block Diagram 8 DIGITAL SIGNAL PROCESSOR (LSI102: HG51B277FB) The DSP receives 16-bit serial sound data output from the CPU and

12、adds the selected effect to the sound data using the effect RAM. Then the DSP provides the sound data to the DAC. The DSP contains two I/O ports, which controls LEDs. The following table shows the pin functions of LSI102. Pin No.TerminalIn/OutFunction 1 4, 80PB0 PB4Out LED drive signal output 5SOOut

13、 Serial sound data output for the DAC 6WCKOOut Word clock output for the DAC 7VDD3In +5 V source 8TEST Not used. 9RESBIn Reset signal input 10VSS2In Ground (0 V) source 11, 12XIN, XOUTIn/Out 16 MHz clock input/output 13WCKIIn Word clock input from the CPU 14SIIn Serial sound data input from the CPU

14、15BCKIIn Bit clock input from the CPU 16SINCIn 1 MHz synchronizing pulse input 17VDD2In +5 V source 18 25IO0 IO7In/Out Data bus 26RCEBOut Chip enable signal output for the working storage RAM 27VSS3In Ground (0 V) source 28AD1In Address bus 29OEBIn Not used. Connected to +5 V source. 30WEBIn Write e

15、nable signal input 31VDD3In +5 V source 32CE2In Chip enable signal input. High active. 33AD0In Address bus 34CE1BIn Chip enable signal input. Low active. 35 41, 43EIO0 EIO7In/Out Data bus for the effect RAM 42, 44, 46 48, 51 57, 59 EA0 EA12Out Address bus for the effect RAM 45ECEBOut Chip enable sig

16、nal output for the effect RAM 49EOEBOut Read enable signal output for the effect RAM 50VSS3In Ground (0 V) source 58EA13Out Not used 60EWEBOut Write enable signal output for the effect RAM 61EA14Out Not used 62, 66, 70, 74, 78 VSS2In Ground source 63, 67, 71, 75, 79 VDD2In +5 V source 64, 65, 68, 69

17、, 72, 73, 76, 77 PA0 PA7Out LED segment signal output 9 Synch signal Data Word clock Bit clock Data Word clock Bit clock DSP LSI102 HG51B277FB DAC LSI106 UPD6379GR CPU LSI101 UPD913GF-3BA L OUT R OUT SI LRCK CLK SO WCKO SCK1 SO LRCK BCK SINC SI WCKI BCKI ECEB APO EWEB EOEB EI00 EI07 EA0 EA12PB0 PB4

18、PA0 PA7 RAM LSI105 DSP LSI102 LVDD La Lh LC0 LC4 Q401 Q407 Q120 LG LED DrivingEffect RAM Access IC105 CE2 CE1 WE OE DSP Block Diagram DAC (LSI106: UPD6379GR) The DAC receives 16-bit serial data output from the DSP. The data contains digital sound data of the melody, chord, bass, and percussion for t

19、he right and left channels. The DAC converts the data into analog waveforms and output them to each channel separately. 10 Pin No.TerminalIn/OutFunction 1Power GNDIn Ground (0 V) source 2Ch1 B.S. Terminal for a bootstrap capacitor 3Ch1 OUTOut Channel 1 output 4VCCIn +9 V source 5Ch1 N.F.In Negative

20、feedback input 6Ch1 INIn Channel 1 input 7D.C. Terminal for a decoupling capacitor 8Pre GNDIn Ground (0 V) source 9Stand byIn Power control signal input. 0 V: Off, +9 V: On 10Ch2 INIn Channel 2 input 11Ch2 N.F.In Negative feedback input 12Ch2 OUTOut Channel 2 output 13Ch2 B.S. Terminal for a bootstr

21、ap capacitor 14NC Not used AVDD 2.2 K AGAGAG 1 K 1 K1 K C332 C331 C331 2SC1740SQ 1 K AGAG 2SC1740SQ AVDD 47 K18 K 50 V 0.22 ? 10V22? From the DAC To main volume FILTER BLOCK Since the sound signals from the DAC are stepped waveforms, the filter block is added to smooth the waveforms. POWER AMPLIFIER

22、 (IC102: LA4598) The power amplifier is a two-channel amplifier with standby switch. The following table shows the pin function of IC101. 11 1 2 3 0.1 s CH1 CH2 CH1:CH2: 5 V5 V 4 20 s CH1 5 VCH1: 5 6 7 CH1 CH2 CH3 50 s 5 VCH1:5 VCH2:5 VCH3: 8 9 0 CH1 CH2 CH3 5 VCH1:5 VCH2:5 VCH3: 5 ms A B C CH1 CH2

23、CH3 2 s 5 VCH1:5 VCH2:5 VCH3: D E F CH1 CH2 CH3 2 s 5 VCH1:5 VCH2:5 VCH3: G H CH1: . 1 V CH1 CH2 CH2: . 1 V 1 ms CH1: 0.5 V CH1 CH2 CH2: 0.5 V 1 ms I J MAJOR WAVEFORMS 1POWER ON signal UPD913GF-3BA pin 21 2APO signal UPD913GF-3BA pin 3 3Reset signal for the DSP UPD913G-3BA pin 99 5Key scan signal KC

24、0 UPD913GF-3BA pin 31 6Key scan signal KC1 UPD913GF-3BA pin 32 7Key scan signal KC2 UPD913GF-3BA pin 33 4Synchronizing pulse UPD913GF-3BA pin 6 AWord clock LRCK UPD913GF-3BA pin 13 BData signal SO UPD913GF-3BA pin 12 CBit clock BCK UPD913GF-3BA pin 11 DWord clock LRCK UPD6379GR pin 1 EData signal SI

25、 UPD6379GR pin 2 FBit clock CLK UPD6379GR pin 3 8LED drive signal PB0 HG51B227FB pin 80 9LED drive signal PB1 HG51B227B pin 1 0LED drive signal PB2 HG51B227FB pin 2 GDAC output (R-ch) UPD6379GR pin 5 HDAC output (L-ch) UPD6379GR pin 8 IPre-amp. output (R-ch) M5218APR pin 7 JPre-amp. output (L-ch) M5

26、218APR pin 1 Note: On Tone : Whistle (68) Key :A4 Touch response : Off Reverb :Off Volume : Maximum 12 PRINTED CIRCUIT BOARD Main PCB JCM469-MA1M 1567 14 15 10 9 8 1112134231718 1920 16 13 SCHEMATIC DIAGRAMS Main PCB JCM469-MA1M/MA2M Note: 1. All capacitance values are indicated in F (p=10-6 F). 2.

27、All resistance values are indicated in (k=103 , M=106 ). 20 19 18 17 3 4 11 12 13 89 10 14 15 16 2 1 567 14 Console PCB JCM469-CN1M 15 Controller PCBs JCM469-CN2/CN3 16 Keyboard PCBs JCM617T-KY1M/KY2M 17 EXPLODED VIEW 16 7 8 9 9 6 10 13 14 12 11 14 15 R-1 2 1 24 10 23 3 4 5 22 19 17 18 R-2 20 21 R-3

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. 1.Prices and specifications are subject to change with- out prior notice. 2.As for spare parts order an

29、d 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 CT-870 ItemCode No.Parts NameSpecificationQR Main PCB 16925 4800Main PCB assy M469-MA1.2MM140392*11 B LSI1012012 3668LSI, CPUUPD913GF-3BA1

30、 A LSI1022012 0441LSI, DSPHG51B277FB1 A LSI103/1052012 0700LSI, RAMLC3564S-102 A LSI1042012 3661LSI, ROMMX23C1610PC-12C381 A LSI1062105 4249LSI, DACUPD6379GR1 A IC1012114 1799ICM5218APR1 A IC1022114 2891ICLA45981 A IC1042114 1421ICPC900V1 A IC1052114 3318ICBA6121 A IC1062105 3941ICRE5VL35AA-TZ1 A Q1

31、01, Q106,2200 4409Transistor2SA933SQ-TP-T3 A Q120 Q102/1042251 0469Transistor2SB1237Q,R-TV6-T2 A 2220 1387Transistor2SC1740SQ-TP-T10 A Q1082253 0357Transistor2SD2008Q,R-T105-T1 A Q111/1122253 0420Transistor2SD1468SR,S-TP-T2 A D101/1112390 1323DiodeRB100A-T32-T2 B D1022390 0371DiodeDSK10B-BT-T1 B 239

32、0 1344Diode1SS133T-77-T6 B D106, D1082360 1085Zener diodeHZS6B1LTD-T2 B D109, D112/1132360 1646Zener diodeMTZJ5.6CT-77-T3 B D1162360 2079Zener diodeMTZJ4.7AT-77-T1 B X1012590 0203Ceramic oscillatorCSA16.00MX0401 B X1022590 2009Crystal oscillatorHC-49/US20A1 B J1013501 7049JackHEC2305-01-3301 B J1023

33、612 0665JackYKB21-50061 B J1033613 0938JackHLJ4416-01-30401 B J1043612 0789JackYKB21-50101 B J1053501 4816JackYKF51-50511 B VR1012765 1575VolumeEWA-MJ0S10B231 A Console PCB 26925 4810Console PCB assy M469-CN1MM140393*11 B Q401 - Q4072200 4409Transistor2SA933SQ-TP-T7 B 2390 1344Diode1SS133T-77-T37 B

34、LED4012370 1141LEDSL-9352-601 B 2370 0616LEDLN28RPX-(TT2)11 C LED409/4102370 1190LEDMVR3378S2 C Controller PCBs 36925 4820Controller PCB assy M469-CN2.3M240412*11 B 2370 0616LEDLN28RPX-(TT2)1 C 3502 2180Stick controllerRKJXK1220-9-50K1 A Keyboard PCBs 46923 6940PCB assy M617T-KY1MM140211*11 B D501 -

35、 D5642301 0101Diode1S2473-T-77-T64 C 56923 6950PCB assy M617T-KY2MM140212*11 B D565 - D6222301 0101Diode1S2473-T-77-T58 C Mechanical Parts 66906 8291Rubber buttonM312088-51 B 76922 2680Rubber buttonM312082-21 B 86925 4960Rubber buttonM312082-41 B 96923 4980Rubber buttonM312122-22 B 106923 4990Rubber

36、 buttonM312123-23 B Notes: Q Used quantity R Rank 19 ItemCode No.Parts NameSpecificationQR 116925 4970Rubber buttonM312125-41 B 126925 4980Rubber buttonM240099-21 B 136925 4990Rubber buttonM240403-11 B 143831 0413SpeakerKC120FEL2 B 156921 5040Slide knobM311860-11 B 166925 4920Display plateM340457-11

37、 C 176922 2860White key set, CSM340503*21 A 186922 2850White key set, CBM340503*14 A 196922 2750Black key set, 5-keyM111726-21 A 206922 2740Black key set, 10-keyM111726-12 A 216922 2760Key contact rubberM211704-14 A 226922 2770Key contact rubberM211705-11 A 236925 2570Control stickM340475-11 A 246918 1630Battery coverM311164*11 B Accessories 1014 9396AC adapter (for China only)AD-5CL-SC1(D)1 B 6925 4890Console sheet (for China only)M140380-11 B Notes: Q Used quantity R Rank 20 MA0900361ASep, 1996