Casio_CTK-631_Service_Manual电路图.pdf

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1、ELECTRONIC KEYBOARD CTK-631 CTK-631 E N T E R C U R S O R ENVELOPE ENVELOPE ENVELOPE AMP 00 FLAT 01-19 VIBRATO 20-49 OTHERS 000-048 DECAY 049-137 SUSTAIN PITCH REST (TIE)3 0123 456 7 TONE RHYTHM 89 PIANO BASS BRASS REED STR/ORCHESTRA ENSEMBLE ORGAN GUITAR CHROMATIC PERC 000GRAND PIANO 001BRIGHT PIAN

2、O 003HONKY-TONK 004ELEC PIANO 1 005ELEC PIANO 2 006HARPSICHORD 007CLAVI 008CELESTA 009GLOCKENSPIEL 010MUSIC BOX 011VIBRAPHONE 012MARIMBA 013XYLOPHONE 015DULCIMER 014TUBULAR BELLS 016DRAWBAR ORGAN 017PERC ORGAN 018ROCK ORGAN 020REED ORGAN 021ACCORDION 022HARMONICA 023BANDONEON 024NYLON STR GT 025STEE

3、L STR GT 019CHURCH ORGAN 002E GRAND PIANO 027CLEAN GUITAR 026JAZZ GUITAR 028MUTE GUITAR 030DIST GUITAR 031GT HARMONICS 032ACOUSTIC BASS 033FINGERED BASS 034PICKED BASS 035FRETLESS BASS 036SLAP BASS 1 037SLAP BASS 2 038SYNTH-BASS 1 039SYNTH-BASS 2 041VIOLA 042CELLO 040VIOLIN 043CONTRABASS 044TREMOLO

4、STR 045PIZZICATO STR 047TIMPANI 048STRINGS 1 049STRINGS 2 050SYNTH-STR 1 051SYNTH-STR 2 052CHOIR AAHS 046HARP 029OVERDRIVE GT PIPE 054SYNTH-VOICE 053VOICE DOO 055ORCHESTRA HIT 056TRUMPET 057TROMBONE 058TUBA 059MUTE TRUMPET 060FRENCH HORN 061BRASS 062SYNTH-BRASS 1 063SYNTH-BRASS2 064SOPRANO SAX 065AL

5、TO SAX 066TENOR SAX 068OBOE 069ENGLISH HORN 067BARITONE SAX 070BASSOON 071CLARINET 073FLUTE 074RECORDER 075PAN FLUTE 076BLOWN BOTTLE 077SHAKUHACHI 078WHISTLE 079OCARINA 072PICCOLO SYNTH-LEAD SYNTH-PAD SYNTH-SFX ETHNIC 080SQUARE WAVE 081SAWTOOTH WAVE 082CALLIOPE 083CHIFF LEAD 084CHARANG 085VOICE LEAD

6、 086FIFTH LEAD 087BASS + LEAD 088NEW AGE 089WARM PAD 090POLYSYNTH 091SPACE CHOIR 092BOWED GLASS 093METALLIC PAD 095SWEEP PAD 094HALO PAD 096RAIN DROP 097SOUNDTRACK 098CRYSTAL 100BRIGHTNESS 101GOBLINS 102ECHOES 103SF 104SITAR 105BANJO 099ATMOSPHERE SYNTH TONE DRUM SET USER TONE PERCUSSIVE SOUND EFFEC

7、TS 107KOTO 106SHAMISEN 108KALIMBA 109BAG PIPE 110FIDDLE 111SHANAI 112TINKLE BELL 113AGOGO 114STEEL DRUM 115WOOD BLOCK 116TAIKO 117MELODIC TOM 118SYNTH-DRUM 119REVERSE CYMBAL 121BREATH NOISE 122SEASHORE 120GT FRET NOISE 123BIRD 124TELEPHONE 125HELICOPTER 127GUNSHOT 128159 167 199 160 168 126APPLAUSE

8、I N T R O S Y N C H R O / E N D I N G N O R M A L / F I L L - I N V A R I A T I O N / F I L L - I N START/STOP POWERTEMPO VOLUMEMODE FULL RANGE BACKLIGHT LCD DIGITAL REVARB 2-WAY MULTI-TRACK MEMORY CHORD FINGERED CASIO CHORD NORMAL MAX MIN POPS IDANCE / FUNK POPS II 00CLUB POP 01EURO POP 0290S POP 0

9、38 BEAT 048 BEAT BALLAD 1 058 BEAT BALLAD 2 0660S 8 BEAT 0716 BEAT 0816 BEAT BALLAD 0916 BEAT SHUFFLE 10POP 1 11POP 2 1270S ROCK 1 13POP BALLAD 1416 BEAT SOUL 15SOUL POP 16WORLD POP 17FUSION SHUFFLE 186/8 BALLAD 1950S R with layer and split Rhythm instrument tones:61 Polyphony:24 notes maximum (12 f

10、or certain tones) Digital effects:3 reverb types (HALL, STAGE, ROOM) Auto accompaniment Rhythm patterns:100 Tempo:Variable (216 steps, = 40 to 255) Chords:4 fingering methods (NORMAL, CASIO CHORD, FINGERED, FULL RANGE CHORD) Rhythm controller:START/STOP, INTRO, NORMAL/NORMAL FILL-IN, VARIATION/VARI-

11、 ATION FILL-IN, SYNCHRO/ENDING Accomp volume:0 to 127 (128 steps) Free session Number of patterns:100 (auto-accompaniment in accordance with selected chord progres- sion) Memory function Songs:2 Recording tracks:6 (2 through 6 are melody tracks) Recording methods:Real-time, step Memory capacity:Appr

12、oximately 5,200 notes (total for two songs) Edit function:Equipped Demo tunes:2 Synthesizer function Parameters:PCM set, amp envelope set, attack rate, release rate, pitch envelope set, pitch, level, touch sense, pan Mixer function Channels:16 Parameters:Program change number, volume, expression, pa

13、n, coarse tuning, fine tuning, on/off/solo MIDI:16 multi-timbre receive, GM Level 1 standard Other functions Pitch bend range:12 semitones upwards and downwards Transpose:25 steps (12 semitones to +12 semitones) Tuning:Variable (A4 = approximately 440 Hz 50 cents) Terminals MIDI terminals:IN, OUT As

14、signable terminal:Standard jack (sustain, sostenuto, soft, rhythm start/stop) Headphone/Output terminal:Stereo standard jack Output Impedance: 120 Output Voltage: 4.5 V (RMS) MAX Power supply terminal:9 V DC Power supply:Dual power supply system Batteries:6 D-size batteries Battery life:Approximatel

15、y 5 hours continuous operation on manganese batteries AC adaptor:AD-5 Auto power off:Turns power off approximately six minutes after last key operation. En- abled under battery power only, can be disabled manually. Speaker output:2.5 W + 2.5 W Power consumption:9 V - 7.7 W Dimensions (HWD):96.0 37.6

16、 15.2 cm (37 13/16 14 13/16 5 15/16 inches) Weight:Approximately 5.5 kg (12.1 lbs) (without batteries) RadioFans.CN 收音机爱 好者资料库 2 ELECTRICAL Current drain with 9 V DC: No sound output412 mA 20 % Maximum volume1165 mA 20 % with 12 keys from C3 to B3 pressed in Square wave tone Volume: maximum, Touch r

17、esponse: maximum Reverb: Hall Phone output level (Vrms with 32 load each channel):L-ch615 mV 20 % with key A5 pressed in Bassoon toneR-ch555 mV 20 % Volume: maximum, Touch response: maximum Reverb: Hall Speaker output level (Vrms with 4 load each channel):L-ch2780 mV 20 % with key A5 pressed in Bass

18、oon toneR-ch2570 mV 20 % Volume: maximum, Touch response: maximum Reverb: Hall Output level (Vrms with 47k load each channel):L-ch3070 mV 20 % with key A5 pressed in Bassoon toneR-ch2750 mV 20 % Volume: maximum, Touch response: maximum Reverb: Hall Minimum operating voltage:6.3 V About General MIDI

19、General MIDI standardizes MIDI data for all sound source types, regardless of manufacturer. General MIDI specifies such factors as tone numbering, drum sounds, and available MIDI channels for all sound sources. This standard makes it possible for all MIDI equipment to reproduce the same nuances when

20、 playing General MIDI data, regardless of the manufacturer of the sound source. This keyboard supports General MIDI, so it can be used to play commercially available pre-recorded General MIDI data and General MIDI data send to it from a personal computer. 3 BLOCK DIAGRAM KC0 KC7 FI0 FI9 SI0 SI9 KI0

21、KI2 PB0 PB3 P10, P13 P14, P17 Working Storage RAM (256K-bit) LSI4 TC55257DFL-70L(EL) MIDI EA0 EA14 EIO0 EIO7 Sound Source ROM (24M-bit) LSI3 LH536PY8 WCKO SO BCK D/A Converter IC1 UPD6379GR Filter Q308 Q311 Main Volume Power Amplifier IC301 TA8248K Keyboard MA0 MA19 Effect RAM (256K-bit) LSI5 TC5525

22、7DFL- 70L(EL) MD0 MD7 Speakers Output MA0 MA14 MA0, MA1 LRCK, SO BCK, SINK LCD LCD Driver LSI501 SED1278F2A SEG1 SEG40 INOUT Reset IC IC2 RN5VD40AA RESET COM1 COM16 DSP LSI2 HG51B277FB-1 MD0 MD15 CPU LSI1 GT913F(T) Buttons Assingnable Jack PB4 VDD Power Switch NMI FI10 P23 PA0 PA5 PB0 PB3 4 KC0KC1KC

23、2KC3KC4KC5KC6KC7 FI10Chord 3Chord 1M96+Tone KI0Chord 4Chord 2 Start/ 83Rhythm Stop KI1Chord 5Intro Tempo 720 Normal/ MFill-In KI2Chord 6 Synchro/Tempo 451 Variation/ EndingLFill-In KC0KC1KC2KC3KC4KCKC6KC7 FI0C2 (1)C#2 (1)D2 (1)D#2 (1)E2 (1)F2 (1)F#2 (1)G2 (1) SI0C2(2)C#2 (2)D2 (2)D#2 (2)E2 (2)F2 (2)

24、F#2 (2)G2 (2) FI1G#2 (1)A2 (1)A#2 (1)B2 (1)C3 (1)C#3 (1)D3 (1)D#3 (1) SI1G#2 (2)A2 (2)A#2 (2)B2 (2)C3 (2)C#3 (2)D3 (2)D#3 (2) FI2E3 (1)F3 (1)F#3 (1)G3 (1)G#3 (1)A3 (1)A#3 (1)B3 (1) SI2E3 (2)F3 (2)F#3 (2)G3 (2)G#3 (2)A3 (2)A#3 (2)B3 (2) FI3C4 (1)C#4 (1)D4 (1)D#4 (1)E4 (1)F4 (1)F#4 (1)G4 (1) SI3C4 (2)

25、C#4 (2)D4 (2)D#4 (2)E4 (2)F4 (2)F#4 (2)G4 (2) FI4G#4 (1)A4 (1)A#4 (1)B4 (1)C5 (1)C#5 (1)D5 (1)D#5 (1) SI4G#4 (2)A4 (2)#4 (2)B4 (2)C5 (2)C#5 (2)D5 (2)D#5 (2) FI5E5 (1)F5 (1)F#5 (1)G5 (1)G#5 (1)A5 (1)A#5 (1)B5 (1) SI5E5 (2)F5 (2)F#5 (2)G5 (2)G#5 (2)A5 (2)A#5 (2)B5 (2) FI6C6 (1)C#6 (1)D6 (1)D#6 (1)E6 (

26、1)F6 (1)F#6 (1)G6 (1) SI6C6 (2)C6# (2)D6 (2)D#6 (2)E6 (2)F6 (2)F#6 (2)G6 (2) FI7G#6 (1)A6 (1)A#6 (1)B6 (1)C7 (1) SI7G#6 (2)A6 (2)A#6 (2)B6 (2)C7 (2) CIRCUIT DESCRIPTION KEY MATRIX BUTTON MATRIX PA0PA1PA2PA3 PB0 Full Range ReverbMixerStep Chord PB1FingeredSynthMemory Accomp Volume PB2Casio ChordDemoF

27、ree SessionSplit PB3Normal Transpose/ Layer Touch Tune/MidiResponse M M 5 Reset IC IC2 RN5VD40AA DSP LSI2 HG51B277FB-1 VDD Reset signal To power supply circuit VDD Battery set RESET VDD POWER From power switch NMI APO PLE CPU LSI1 GT913F(T) SCKO F#3 G#3 A#3C#4 D#4F#4 G#4 A#4 C#5 D#5F#5G#5 A#5 F3G3A3

28、B3C4D4E4F4G4A4B4C5D5E5F5G5A5B5C6 D#3 C2D2E2F2G2A2B2C3D3E3B6A6G6F6E6D6C7 C#3A#2G#2F#2D#2C#2A#6G#6F#6D#6C#6 Key Second contact (2) First contact (1) FI KC SI Note: Each key has two contacts, the first conatct (1) and second contact (2). POWER SUPPLY CIRCUIT The power supply circuit generates five volt

29、ages as shown in the following table. VDD voltage is always generated. The others are controlled by APO signal from the CPU. NOMENCLATURE OF KEYS RESET CIRCUIT When batteries are set or an AC adapter is connected, the reset IC provides a low pulse to the CPU. The CPU then initializes its internal ci

30、rcuit, and clears the working storage RAM. When the power switch is pressed, the CPU receives a low pulse of POWER signal. The CPU sends APO signal to the power supply circuit, also sends a reset signal to the DSP. NameVoltageFor operation of VDD+5 VCPU, Reset IC, DSP, Sound source ROM, Working stor

31、age RAM, Effect RAM DVDD+5 VLCD driver, Power jack, Sustain jack, MIDI jack AVDD+5 VDAC, Filter LVDD+5.6 VLCD dirver VCC+9 VPower amplifier, Pilot lamp 6 CPU (LSI1: GT913F-(T) The 16-bit CPU contains a 1k-byte RAM, three 8-bit I/O ports, two timers, a key controller and serial interfaces. The CPU de

32、tects key velocity by counting the time between first-key input signal FI and second-key SI from the keyboard. The CPU reads sound data and velocity data from the sound source ROM in accordance with the selected tone; the CPU can read rhythm data simultaneously when a rhythm pattern is selected. The

33、n the CPU provides 16-bit serial sound data to the DSP. The CPU also controls MIDI input/output and stores sequencer data into the working storage RAM. The following table shows the pin functions of LSI1. Pin No.TerminalIn/OutFunction 1TXD0OutMIDI signal output 2RXD0InMIDI signal input 3SCK0OutAPO (

34、Auto Power Off) signal output 4, 5TXD1, RXD2In/OutData bus for the LCD driver 6SCK1Out1 MHZ synchronizing pulse output 7AVCCInDVDD (+5 V) source 8AN0In AC adaptor detection terminal. +5 V when the keyboard is powered by batteries and becomes 0 V to cancel the APO function when AC adaptor is connecte

35、d. 9AN1Not used. Connected to ground. 10AGNDInGround (0 V) source 11BCKOutBit clock output 12SOOutSerial sound data output 13LRCKOutWord clock output 14GNDInGround (0 V) source 15, 16XLT0, XLT1In/Out20 MHz clock input/output 17VCCIn+5 V source 18, 19MD0, MD1InMode selection terminal 20RSTBInReset si

36、gnal input 21NMIInPower ON signal input 22INT/P10In/OutData bus for the LCD driver 23 30 FI0 FI3 InTerminal for key input signal SI0 SI3 31 38KC0 KC7OutTerminal for key scan signal 39 46 FI4 FI7 InTerminal for key input signal SI4 SI7 47 50 FI8, FI9 Not used SI8, SI9 51FI10InTerminal for button inpu

37、t signal 52SI10/P23OutChip enable signal for the LCD driver 53 55KI0 KI2InTerminal for button input signal 56MWNBOutWrite enable signal for the DSP 57 76MA0 MA17OutAddress bus 77MCSB0OutChip enable signal output for the sound source ROM 78MCSB1OutNot used 79MCSB2OutChip enable signal output for the

38、DSP 7 DIGITAL SIGNAL PROCESSOR (LSI2: HG51B227FB-1) The DSP receives 16-bit serial sound data output from the CPU and adds the selected effect to the sound data using the effect RAM. Then the DSP provides the sound data to the DAC. The DSP also controls button input/ output. The following table show

39、s the pin functions of LSI2. Pin No.TerminalIn/OutFunction 80VCCIn+5 V source 81GNDInGround (0 V) source 82MRDBOutRead enable signal output for the sound source ROM 83 98MD0 MD15In/OutData bus 99PLEOutReset signal output for the DSP 100P17In/OutData bus for the LCD driver Pin No.TerminalIn/OutFuncti

40、on 1 3, 80PB0 PB3InButton input terminals 4PB4InASSIGNABLE Jack input 5SOOutSerial sound data output for the DAC 6WCKOOutWord clock output for the DAC 7VDD3In+5 V source 8TESTNot used 9RESBInReset signal input 10VSS2InGround (0 V) source 11, 12XIN, XOUTIn/Out20 MHz clock input/output 13WCKIInWord cl

41、ock input from the CPU 14SIInSerial sound data input from the CPU 15BCKIInBit clock input from the CPU 16SINCIn1 MHz synchronizing pulse input 17VDD2In+5 V source 18 25IO0 IO7In/OutData bus 26RCEBOutChip enable signal output for the working storage RAM 27VSS3InGround (0 V) source 28AD1InAddress bus

42、29OEBOutOutput enable signal for working storage RAM 30WEBInWrite enable signal 31VDD3In+5 V source 32CE2InChip enable signal input. High active. 33AD0InAddress bus 34CE1BInChip enable signal input. Low active. 35 41, 43EIO0 EIO7In/OutData bus for the effect RAM 8 LCD DRIVER (LSI501: SED1278F2A) The

43、 LCD driver can drive a dot matrix LCD having 40 segment and 16 common lines. The LSI contains 240 graphic symbols in the built-in character generator ROM, and stores 80 characters in the built-in display data RAM. In accordance with command from the CPU, the LSI is capable of displaying up to 16 ch

44、aracters simultaneously. The following table shows the pin functions of LSI 501. Pin No.TerminalIn/OutFunction 42 , 44, 46 48, EA0 EA12OutAddress bus for the effect RAM 51 59, 61 45ECEBOutChip enable signal output for the effect RAM 49EOEBOutRead enable signal output for the effect RAM 50VSS3InGroun

45、d (0 V) source 60EWEBOutWrite enable signal output for the effect RAM 62, 66, 70, 74, 78VSS2InGround source 63, 67, 71, 75, 79VDD2In+5 V source 64, 65, 68, 69, PA0 PA5OutButton scan signal output 72, 73 76, 77PA6/7OutNot used Pin No.TerminalIn/OutFunction 1 22, SEG1 SEG40OutSegment signal output 63

46、80 23VSSGND (0 V) source 24, 25OSC1, OSC2In/Out Terminals for the built-in clock pulse generator. The external resistor connected determines the oscillation frequency. 26 30V1 V5In LCD drive voltage input. Those voltages are used for generating the stepped pulse of the LCD drive signals. 31, 32LP, X

47、CLSNot used 33VDDInDVDD (+5 V) source 34, 35FR, DONot used 36RSIn Data/command determination terminal. High: data, Low: command 37R/WInRead/write terminal. High: read, Low: write 38EIn Chip enable signal. High: enable, the writing is done at fall edge. Low: disenable 39 42DB0 DB3Not used. Connected

48、to GND (0 V) 43 46DB4 DB7In/OutData bus 47 62COM1 COM16OutCommon signal/output 9 680 50V22 C341 Q309 R340 1.5K AVDD AG AGAG 50V22 Q308 C340 C123H C346 R342R343R344 3.3K4.7K1K 6.3V220 2SC1740STPR 2SC1740STPR R341 C345 C821BA C339 1.5K R335 C123H C343 Q310 Q311 3.3K4.7K1K R337R338 C349 50V22 C350 50V2

49、2 R336 AG AGAG AVDD 2SC1740STPR 2SC1740STPR 1K 22K22K 10K 3.9K 1K R339 R346 R348R349 C348 10V100 R347 R345 C342 C821BA R334 680 From DAC To main volume Synch signal Data Word clock Bit clock Data Word clock Bit clock DSP LSI2 HG51B277FB DAC IC1 UPD6379GR CPU LSI1 GT913F(T) L OUT R OUT SI LRCK CLK SO WCKO SCK1 SO LRCK BCK SINC SI WCKI BCKI FILTER BLOCK Since the sound signals from the DAC are stepped waveforms, the filter block is added to smooth the waveforms. DAC (IC1: UPD6379GR)