Casio_CTK-680_Service_Manual电路图.pdf

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1、GM SOUND KEYBOARD CTK-680 CTK-680 RadioFans.CN 收音机爱 好者资料库 2 CONTENTS Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Circuit Description . . . . .

2、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Major Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Printed Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Schematic Diagrams . . . . . . .

3、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 SPECIFICATIONS GENERAL Model:CAS

4、IO CTK-680 Keyboard:61-key, 5-octave standard size keyboard with touch response (three sensi- tivity levels and OFF setting) Tones:128 tones (Conform with General MIDI level 1) + 8 drum sounds with split/ layer features. Polyphony:32 notes maximum Digital effects:10 REVERB 1, REVERB 2, REVERB 3, CHO

5、RUS, TREMOLO, PHASE SHIFTER, ORGAN SPEAKER, ENHANCER, FLANGER, LOUDNESS Musical pads:120 (four pads 30 sets) Phrases (22 sets), drums/percussion (7 sets), controller (1 set) Phrases matche chord Demo tunes:3, sequential repeat playback Auto-accompaniment Rhythm patterns:100 Tempo:Adjustable (216 lev

6、els, q = 40 to 255) Chords:3 types (CASIO Chords, Fingered, Full-Range Chords) Parts:Rhythm, bass, Chord 1, Chord 2, Chord 3 (adjustable on/off, tone, volume, pan, effect send, fine tune, coarse tune, expression settings) Others:Intro, Normal Fill-in, Variation Fill-in, Synchro/Ending Magical preset

7、s:50 types (Break Beat, Melodycomp, Shadow Drum, Free Session) Registration memory:10 Tone changes, tempo setting, auto-accompaniment volume setting, mode, layer on/off, Mixer settings, effect type, split on/off, rhythm type, auto- accompaniment rhythm assignment, pad type, chord fingering method, t

8、ouch response setting, MIDI settings (including assignable jack settings), Magical Preset type Mixer Number of channels:16 Parameters:TONE, VOLUME, PAN, EFFECT SEND, FINE TUNE, COARSE TUNE, EXPRESSION Multi-track memory Number of songs:2 Tracks:6 (tone, volume, auto accompaniment, magical presets, p

9、an, effect send, fine tune, coarse tune, expression) Type:Real-time Capacity:Approximately 5,200 notes RadioFans.CN 收音机爱 好者资料库 3 Other functions Transpose:25 levels (1 octave lower C to 1 octave upper C) Tuning:Adjustable: A4 = 440 Hz 50 cents Pitch Bender:Adjustable range: 12 semitones (bend up, be

10、nd down, bend saw) using musical pads Modulation:Vibrato setting and performances are done by a Musical pad. MIDI:16-timbre multi-timbre receive (General MIDI Level 1) Speakers:12 cm diameter 2 (output: 2.5 W + 2.5 W) Input/Output Jacks Power supply:9 V DC Headphones:Stereo mini jack Output jacks:Ou

11、tput impedance: 120 Output voltage 4.2 V (RMS) MAX Assignable Jack:Standard jack (sustain, sostenuto, soft, rhythm start/stop) MIDI terminals:IN, OUT Power supply:2-way Batteries:Six D-size batteries Battery life:Approximately 5 hours on R20P (SUM-1) manganese batteries AC adaptor:AD-5 (optional) Au

12、to power off:Approximately six minutes after last key operation under battery power (disabled when AC adaptor is connected). Power consumption:9 V - 7.7 W Dimensions:94.2 36.7 13.5 cm (31-7/16 14-1/2 4-3/8 inches) Weight:5.2 kg (11.7 lbs) excluding batteries ELECTRICAL Current drain with 9 V DC: No

13、sound output320 mA 20% Maximum volume with 12 polyphonic notes in tone No. 022960 mA 20% Volume; maximum Phone output level (Vrms with 8 load each channel):Left channel 115 mV 20% with key C6 pressed in tone No. 042 Line output level (Vrms with 47 k load each channel):Left channel 1280 mV 20% with k

14、ey C5 pressed in tone No. 042 Minimum operating voltage:5.75 V RadioFans.CN 收音机爱 好者资料库 4 BLOCK DIAGRAM KC0 KC7 SI0 SI7 FI0 FI7 Key Controller LSI16 HG52E35P Working Storage RAM (256K-bit) LSI15 TC55257DFL-70L KO1 KO4, KO8 LED Driver IC301 BA612 LD0 LD7 Buttons KI1 KI4 Power Switch IN EA0 EA14 ED0 ED

15、7 DSP IC11 HG51B155FD RA0 RA20 RD0 RD15 Sound Source ROM (24M-bit) LSI12 MX23C2410MC-12CA54 WCK1 SLOP BCK D/A Converter IC11 UPD6376GS Filter Q208 Main Volume Power Amplifier IC202 LA4598 CPU LSI14 HD6433294A33F Keyboard A0 A14 NMI Power Supply Circuit IC203, Q201 Q206 VCCAVDDVDD LVDD DVDD VC Effect

16、 RAM (256K-bit) LSI13 LC33832M-70 D0D7 Speakers Output A0 A14 A0 A3 A0 A2 7-seg. LED LEDs LED Driver Q15 Q18 Gate Array LSI17 UPD65611GB-019 La Lg, Lp LC1 LC4, LC8 MIDI OUT KOC KOD CLK KO0 KO9 Filter Q207 RES Reset IC IC13 RH5VL36AA 5 CIRCUIT DESCRIPTION KEY MATRIX Note: Each key has two contacts, t

17、he first conatct (1) and second contact (2). Key Second contact (2)First contact (1) FI KC SI KC0KC1KC2KC3KC4KC5KC6KC7 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)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

18、)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)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

19、(1)D5 (1)D#5 (1) SI4G#4 (2)A4 (2)A#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 (1)F6 (1)F#6 (1)G6 (1) SI6C6 (2)C#6 (2)D6 (2)D#6 (2)E6 (2)F6 (2)F#6 (2)G6 (2) FI7G#6

20、(1)A6 (1)A#6 (1)B6 (1)C7 (1) SI7G#6 (2)A6 (2)A#6 (2)B6 (2)C7 (2) 6 KI1KI2KI3KI4 KO0MODEPAD APAD BPAD D KO1TEMPO UPTEMPO DOWNSTART/STOPPAD C KO2RHYTHMTONE KO3 MAGICAL PRESET LAYERSPLIT KO4DEMO TOUCH RESPONSE DIGITAL EFFECTREGISTRATION KO5 SYNCHRO/ ENDING VAR/FILL-INNORMAL/FILL-ININTRO KO6987+ KO7456

21、KO8 ACCOMP VOLUME MULTI-TRACK MEMORY TRANSPOSE/ TUNE/MIDI MIXER KO90123 NOMENCLATURE OF KEYS BUTTON MATRIX F#3 G#3 A#3C#4 D#4F#4 G#4 A#4 C#5 D#5F#5G#5 A#5 F3G3A3B3C4D4E4F4G4A4B4C5D5E5F5G5A5B5C6 D#3 C2D2E2F2G2A2B2C3D3E3B6A6G6F6E6D6C7 C#3A#2G#2F#2D#2C#2A#6G#6F#6D#6C#6 POWER SUPPLY CIRCUIT The power su

22、pply circuit generates six voltages as shown in the following table. VDD voltage is always generated. The others are controlled by APO signal output from the CPU. NameVoltageFor operation of VDD+5.0 VCPU, Reset IC, Working storage RAM, Gate array DVDD+5.2 VDSP, Key controller, Sound source ROM, Effe

23、ct RAM AVDD+5.0 VDAC, Filter LVDD+5.0 VLED Driver VCC+12 VPilot lamp VC+12 VPower amplifier 7 CPU (LSI14: HD6433294A33F) The 16-bit CPU contains a 32k-bit ROM, a 1k-bit RAM, seven 8-bit I/O ports, an A/D convertor and MIDI interfaces. The CPU gains access to the working storage RAM, the DSP and the

24、key controller. The CPU interprets MIDI message using the working storage RAM. The CPU also controls buttons and LEDs. The following table shows the pin functions of LSI14. DIGITAL SIGNAL PROCESSOR (LSI11: HG51B155FD-1) Upon receipt of note numbers and their velocities, the DSP reads sound and veloc

25、ity data from the sound source ROM in accordance with the selected tone; the DSP can read rhythm data simultaneously when a rhythm pattern is selected. Then it provides 16-bit serial signal containing data of the melody, chord, bass, and percussion to the DAC. When an effect is selected, the DSP add

26、s the effect to the sound data using a 256k-bit RAM. The following table shows the pin functions of LSI11. Pin No.TerminalIn/OutFunction 1P50/TXDOutMIDI signal output 2P51/RXDInMIDI signal input 3P52/SCKOutReset signal output 4-RESETInReset signal input 5-NMIInPower ON trigger signal input 6VCCIn+5

27、V source 7-STBYInStandby signal input. Connected to +5 V. 8VSSInGround (0 V) source 9, 10XTAL, EXTALIn16 MHz clock input 11, 12MD1, MD0InMode selection input 13AVSSInGround (0 V) source 14P70InAnalog input terminal for the pitch bend wheel 15 21P71 P77OutInput terminals from keys (KI1 KI7) 22AVCCIn+

28、5 V source 23 30P60 P67OutLED drive signal output 31VCCIn+5 V source 32 48A0 A15OutAddress bus 40VSSInGround (0 V) source 49 56D0 D7In/Out Data bus 57P40OutKO signal data 58P41OutClock for KO signal generator 59P42OutAPO signal output 60P43OutRead enable signal output 61P44InWrite enable signal outp

29、ut 62P45Not used 63P46Out16 MHz clock output 64P47Not used. Connected to +5 V source. 8 Pin No.TerminalIn/OutFunction 1 8CD0 CD7In/Out Data bus 9, 10CE1, TRSBNot used 11GND7InGround (0 V) source 12CK16OutTerminal for 24.576 MHz clock check point 13VCC6In+5 V source 14CK0InClock input. Connected to t

30、erminal CK16. 15TCKBNot used 16VCC1In+5 V source 17GND1InGround (0 V) source 18, 19XT0, XT1In/Out 24.576 MHz clock input/output 20SGLInSystem control terminal. Single chip system: Open 21CCSBInChip select signal input 22 25CA0 CA3InAddress bus 26CE0InNot used. Connected to ground. 27CWRBInWrite enab

31、le signal 28CRDBInRead enable signal 29 32Not used 33RESBInReset signal input 34TESBInNot used. Connected to +5 V. 35 39Not used 40 49 52 57 50VCC2In+5 V source 51GND2InGround (0 V) source 58RA23OutNot used 59RA22OutChip select signal for the sound source ROM 60RA21OutNot used 61 73 75 82 74GND5InGr

32、ound (0 V) source 83WOK2OutNot used 84VCC3In+5 V source 85GND3InGround (0 V) source 86WOK1OutWord clock for the DAC 87SOLMOutNot used 88SOLPOutSerial sound data output 89BOKOutBit clock output 90 92Not used 93VCC5In+5 V source 94, 95 97 105 107, 109 110, 112 96EWEBOutWrite enable signal for the effe

33、ct RAM RD0 RD15Data bus for the sound source ROMIn RA0 RA20Address bus for the sound source ROMOut EA0 EA14Address bus for the effect RAMOut 9 Block diagram of DSP and DAC circuit Pin No.TerminalIn/OutFunction 106EOEBOutRead enable signal output for the effect RAM 108VCC7In+5 V source 111ECEBOutChip

34、 select signal output for the effect RAM 113 117ED11 ED15Not used 118VCC4In+5 V source 119GND4InGround (0 V) source 120 122ED8 ED10Not used 123 130ED0 ED7In/Out Data bus for the effect RAM 131GND6InGround (0 V) source 132 134Not used. Connected to ground. 135, 136Not used DSP LSI11 HG51B155FD-1 Effe

35、ct RAM (256K-bit) LSI13 LC33832M-70-TLM Sound Source ROM LSI12 MX23C2410MC-12CA54 CEA0 A20Q0 Q15 RA0 RA20 RD0 RD15 RA22 D0 D7 A0 A3 SOLP BOK WOK1 EA0 EA14 ED0 ED7 CS WEOE I/01 I/08A0 A14 ECEB EOEB EWEB PG X11 24.576 MHz DAC IC11 UPD6376GS LOUT ROUT SOLP: Sound data BOK: Bit clock WOK1: Word clock SI

36、 CLK LRCK CCSB LSIB RDAB WRAB RESET CRDB CWRB RESB Gate Array LSI17 UPD65611GB From CPU 10 DAC (IC11: UPD6376GS) 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 the right and left channels. The DAC converts

37、the data into analog waveforms by each channel and output them separately. The following table shows the pin functions of IC11. CRDB CWRB CKI CCSB CD0 CD7 CA0 CA2 First contact Second contact KC0 KC7 FI0 FI7 SI0 SI7 Key input signal Key scan signal Data bus Address bus Key Controller LSI16 HG52E35P

38、Keyboard FI SI KC RDAB WRAB CLKA HGB RESET RESB LSI17 PD65611GB KEY CONTROLLER (LSI16: HG52E35P) The key controller generates key scan signals and provides them to the keyboard. By counting the time between first-key input signal FI and second-key SI from the keyboard, the key controller detects key

39、 velocity. The note number and its velocity data are read at regular intervals by the CPU. Pin No.TerminalIn/OutFunction 1SELInMode selection terminal. Connected to ground. 2D.GNDInGround (0 V) source for the internal digit circuit 3NCNot used 4DVDDIn+5 V source for the internal digital circuit 5A.G

40、NDInGround (0 V) source for the right channel 6R.OUTOutRight channel sound waveform output 7, 8A.VDDIn+5 V source for the internal analog circuit 9R.REFInRight channel reference voltage terminal 10L.REFInLeft channel reference voltage terminal 11L.OUTOutLeft channel sound waveform output 12A.GNDInGr

41、ound (0 V) source for the left channel 13LRCKInWord clock input 14LRSELInNot used. Connected to ground. 15SIInSound data input 16CLKInBit clock input 11 The following table shows the pin functions of LSI16. Pin No.TerminalIn/OutFunction 1REQBOutNot used FI8 FI10, SI8 SI10 4VCCIn+5 V source 5CRDBInRe

42、ad enable signal input 6CWRBInWrite enable signal input 7CCSBInChip select signal input 8, 9, 11T, STBY, WInNot used. Connected to +5 V. 10RESBInReset signal input 12CKIIn16 MHz clock input 13, 14TMD, TSTInNot used. Connected to ground. 15CKOOutNot used 16GNDInGround (0 V) source 17XINInNot used. Co

43、nnected to ground. 18XOUTOutNot used 19TRESInNot used. Connected to ground. 20 23, 25 28CD0 CD7In/OutData bus 24GND In Ground (0 V) source 29 31CA0 CA2InAddress bus 32VCCIn+5 V source 33 39, 41 43,FI0 FI9, 53 55, 57 63SI0 SI9 40VCCIn+5 V source 44 47, 49 52KC0 KC7OutKey scan signal 48, 56GNDInGround

44、 (0 V) source 64VCCIn+5 V source 2, 3, 60 63In In Not used. Connected to +5 V. Key input signal input 12 GATE ARRAY (LSI17: UPD65611GB) The gate array provides chip enable signals for DSP, Key Controller, and Working Storage RAM. The LSI also generates scan signals of the button switches with K0O an

45、d K0C signals from the CPU. KO0 KO15To CPU KI1 KI4 A4 A15 Gate Array UPD65611GB LSI17 Button Switch Matrix K0O K0C HGB CLKA SAMPB CWRB CRDB CCSB CKI CS LSIB WRAB RDAB CCSB CWRB CRDB CLK DSP HG51B155FD LSI11 Key Controller HG52E35P LSI16 Working Storage RAM TC55257DFL-70L LSI15 From CPU Each pin func

46、tion of the LSI is listed below. Pin No.TerminalIn/OutFunction 1K0CInPrimary signal for KO0 KO15 2APOBInAPO signal from CPU 3RDBInRead enable signal from CPU 4WRBInWrite enable signal from CPU 5WRABOutWrite enable signal for DSP and Key Controller 6CLKInClock pulse from CPU 7LSIBOutDSP chip select s

47、ignal 8RDABOutRead enable to DSP and Key Controller 9RESETOutDSP and Key Controller reset signal 10LED1Not used 11LED0Not used 17GNDInGround (0 V) source 23NCNot used 24GNDInGround (0 V) source 25CLKAOut16 MHz Clock pulse for Key Controller 26GNDInGround (0 V) source 27HGBOutKey Controller chip sele

48、ct signal 12 16, 18 22OutButton switch scan signalsKO0 KO9 13 POWER AMPLIFIER (IC202: LA4598) The power amplifier is a two-channel amplifier with standby switch. The following table shows the pin function of IC202. Pin No.TerminalIn/OutFunction 28SAMPBOutWorking Storage RAM chip select signal 29, 30

49、D0, D1InData bus 44K0OInClock pulse from CPU A4 A1531 38, 40 43InAddress bus FILTER BLOCK Since the sound signals from the DAC are stepped waveforms, the filter block is added to smooth the waveforms. AGAG R249 2.2K R247 C223(H) R245R243 1K1K1K 1K1K1K C244 C152B C246 C472B AG Q207 2SC1740SR Q208 2SC1740SR C242 22 R236 AVDD AGAG R250 2.2K R248R246R244 C245 C152B C247 C472B AG C243 C223H From DA ConverterTo Power Amp. Main Volume Pin No.Te