Casio_WK-1200_Service_Manual电路图.pdf

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1、ELECTRONIC KEYBOARD WK-1200 WK-1200 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? REVERB GM FREE SESSION LAYER SPLIT TOUCH RESPONSE MEMORY TRACK/DRUM PAD HALL STAGE ROOM SYNTH MIXER MEMORY STEP CHORD/123456 REVERB SYNTH MIXER MUSICAL INFO

2、RMATION SYSTEM MEMORY STEP TEMPOACCOMP VOLUME SYN CHR O/E NDI NG INT RO NO RM AL/F ILL-I N VAR/ FILL -IN AMP ENVELOPE 000-048 DECAY PITCH ENVELOPE 00 FLAT049-137 SUSTAIN01-19 VIBRATO20-49 OTHERS MODE POWER VOLUME 100 RHYTHMS FULL RANGE MAX ENVELOPE MIN CHORD FINGERED CASIO CHORD NORMAL TRANSPOSE/ FR

3、EE SESSION LAYER SPLIT TOUCH RESPONSE TUNE/MIDI CU RS OR RHYTHMTONE ENTER 200TONES DEMO TIE REST 3 RadioFans.CN 收音机爱 好者资料库 1 SPECIFICATIONS GENERAL Keyboard:73 standard-size keys, 6 octaves (with touch response on/off) Drum pads:6 Tones:200 (128 General MIDI, 32 synthesized, 8 drum, 32 user); with l

4、ayer and split Rhythm instrument tones:51 Polyphony:24 notes maximum (12 for certain tones) Digital effects:3 reverb types (HALL, STAGE, ROOM) Auto accompaniment Rhythm patterns:100 Tempo:Variable (216 steps, = 40 to 255) Chords:3 fingering methods (CASIO CHORD, FINGERED, FULL RANGE CHORD) Rhythm co

5、ntroller:START/STOP, INTRO, NORMAL /FILL-IN, VAR/FILL-IN, SYNCHRO/ ENDING Accomp volume:0 to 127 (128 steps) Free session Number of patterns100 (auto-accompaniment in accordance with selected chord progres- sion) Memory function Songs:2 Recording tracks:6 (2 through 6 are melody tracks) Recording me

6、thods:Real-time, step Memory capacity:Approximately 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:Pro

7、gram change number, volume, expression, pan, 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

8、cents) CONTENTS Page Specifications. 1 Block Diagram. 3 Circuit Description. 4 Adjustment . 12 Major Waveforms . 13 Printed Circuit Boards . 14 Schematic Diagrams . 15 Exploded View . 21 Parts List . 23 RadioFans.CN 收音机爱 好者资料库 2 ELECTRICAL Current drain with 12 V DC: No sound output430 mA 20 % Maxim

9、um volume1570 mA 20 % with 24 keys from C4 to C6 pressed in Bassoon tone Volume: maximum, Touch response: maximum Reverb: Hall Phone output level (Vrms with 8 load each channel): with key A5 pressed in Bassoon toneL-ch165 mV 20 % Volume: maximumR-ch150 mV 20 % Reverb: Hall Speaker output level (Vrms

10、 with 4 load each channel): with key A5 pressed in Bassoon toneL-ch5500 mV 20 % Volume: maximumR-ch5200 mV 20 % Reverb: Hall Output level (Vrms with 47 k load each channel): with key A5 pressed in Bassoon toneL-ch4260 mV 20% R-ch3950 mV 20% Minimum operating voltage:6.3 V About General MIDI General

11、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 playing

12、 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. Terminals MIDI terminals:IN, OUT Assignable terminal

13、:Standard jack (sustain, sostenuto, soft, rhythm start/stop) Headphone/Output terminal:Stereo standard jack Output Impedance: 200 Output Voltage: 4.9 V (RMS) MAX Power supply terminal:12 V DC Power supplyDual power supply system Batteries:Six D-size batteries Battery life:Approximately 2 hours (UM-1

14、/R20) 8 hours (AM-1/LR20) AC adaptor:AD-12 Auto power off:Turns power off approximately six minutes after last key operation. En- abled under battery power only, can be disabled manually. Power consumption:12 V - 18 W Speaker output:5 W + 5 W Dimensions (HWD):116.2 42.1 14.7 cm (45-13/16 16-9/16 5-1

15、3/16 inches) Weight:Approximately 9.1 kg (20.1 lbs) (without batteries) RadioFans.CN 收音机爱 好者资料库 3 BLOCK DIAGRAM KC0 KC7 FI0 FI9 SI0 SI9 KI0 KI2 PB0 PB3 P10, P13 P14, P17 Working Storage RAM (256K-bit) LSI4 TC55257DFL-70L(EL) MIDI EA0 EA14 EIO0 EIO7 Sound Source ROM (16M-bit) LSI3 MX23C1610MC- 12CA64

16、 LRCK SO BCK D/A Converter IC1 UPD6379GR Filter Q308 Q311 Main Volume Power Amplifier IC301 LA4620 Keyboard MA0 MA19 Power Supply Circuit Q301 Q304, 306, 307 D307, 310 VCCAVDDVDD CVDDLVDD VC APO Effect RAM (256K-bit) LSI5 TC55257DFL- 70L(EL) MD0 MD7 Speakers Output MA0 MA14 MA0, MA1 LRCK, SO BCK, SI

17、NK LCD LCD Driver LSI501 SED1278F0A SEG1 SEG40 INOUT Reset IC IC2 RN5VD40AA RESET COM1 COM16 DSP LSI2 HG51B277FB-1 MD0 MD15 CPU LSI1 GT-913F Buttons Assingnable Jack PB4 VDD Power Switch NMI FI10 P23 PA0 PA5 PB0 PB3 4 CIRCUIT DESCRIPTION KEY MATRIX Note: Each key has two contacts, the first conatct

18、(1) and second contact (2). Key Second contact (2)First contact (1) KC SI FI 0CK1CK2CK3CK4CK5CK6CK7CK 0IF)1(1C)1(1#C)1(1D)1(1#D)1(1E)1(1F)1(1#F)1(1G 0IS)2(1C)2(1#C)2(1D)2(1#D)2(1E)2(1F)2(1#F)2(1G 1IF)1(1#G)1(1A)1(1#A)1(1B)1(2C)1(2#C)1(2D)1(2#D 1IS)2(1#G)2(1A)2(1#A)2(1B)2(2C)2(2#C)2(2D)2(2#D 2IF)1(2E

19、)1(2F)1(2#F)1(2G)1(2#G)1(2A)1(2#A)1(2B 2IS)2(2E)2(2F)2(2#F)2(2G)2(2#G)2(2A)2(2#A)2(2B 3IF)1(3C)1(3#C)1(3D)1(3#D)1(3E)1(3F)1(3#F)1(3G 3IS)2(3C)2(3#C)2(3D)2(3#D)2(3E)2(3F)2(3#F)2(3G 4IF)1(3#G)1(3A)1(3#A)1(3B)1(4C)1(4#C)1(4D)1(4#D 4IS)2(3#G)2(3A)2(3#A)2(3B)2(4C)2(4#C)2(4D)2(4#D 5IF)1(4E)1(4F)1(4#F)1(4G

20、)1(4#G)1(4A)1(4#A)1(4B 5IS)2(4E)2(4F)2(4#F)2(4G)2(4#G)2(4A)2(4#A)2(4B 6IF)1(5C)1(5#C)1(5D)1(5#D)1(5E)1(5F)1(5#F)1(5G 6IS)2(5C)2(5#C)2(5D)2(5#D)2(5E)2(5F)2(5#F)2(5G 7IF)1(5#G)1(5A)1(5#A)1(5B)1(6C)1(6#C)1(6D)1(6#D 7IS)2(5#G)2(5A)2(5#A)2(5B)2(6C)2(6#C)2(6D)2(6#D 8IF)1(6E)1(6F)1(6#F)1(6G)1(6#G)1(6A)1(6#

21、A)1(6B 8IS)2(6E)2(6F)2(6#F)2(6G)2(6#G)2(6A)2(6#A)2(6B 9IF)1(7C 9IS)2(7C NOMENCLATURE OF KEYS C2 C#2 D#2F#2 G#2 A#2C#3 D#3F#3 G#3 A#3C#4 D#4F#4 G#4 A#4C#5 D#5F#5 G#5 A#5C#6 D#6F#6 G#6 A#6 D2E2F2G2A2B2C1D1E1F1G1A1B1C3D3E3F3G3A3B3 C#1 D#1F#1 G#1 A#1 C4D4E4F4G4A4B4C5D5E5F5G5A5B5D6E6F6G6A6B6C6C7 5 PA0PA1

22、PA2PA3 PB0 FULL RANGE INTRO TOUCH REVERB CHORDRESPONSE PB1FINGERED NORMAL/FREEACCOMP FILL-INSESSIONVOLUME PB2 CASIOSYNCHRO/ LAYERSYNTH CHORDENDING PB3NORMAL VARIATION/ SPILITMIXER FILL-IN KC0KC1KC2KC3KC4KC5KC6KC7 DRUMDRUMPITCH H FI10PAD 3 PAD 1BEND ENTER 96+TONE CHORD 3CHORD 1H DRUMDRUMPITCH G START

23、/ KI0PAD 4PAD 2BEND STOP 83RHYTHM CHORD 4CHORD 2G DRUM TEMPO KI1PAD 5STEP H E720DEMO CHORD 5 DRUM TEMPOGTRANSPOSE/ KI2PAD 6MEMORY G F451 CHORD 6 TUNE/MIDI POWER SUPPLY CIRCUIT The power supply circuit generates five voltages as shown in the following table. VDD and VC voltages are always generated.

24、The others are controlled by APO signal from the CPU. BUTTON MATRIX NameVoltageFor operation of VDD+5 VCPU, Reset IC, DSP, Sound source ROM, Working storage RAM, Effect RAM AVDD+5 VDAC, Filter LVDD+5.6 VLCD driver VCC,VC+9 VPower amplifier, Pilot lamp CVDD+5 VPower jack, Pedal jack, MIDI jacks, Sour

25、ce voltage for LCD backlight 6 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 circuit, and clears the working storage RAM. When the power switch is pressed, the CPU receives a low pulse of POWER

26、signal. The CPU sends APO signal to the power supply circuit, also sends a reset signal to the DSP. LCD BACKLIGHT When voltage CVDD is supplied, transistors Q501 and 502 start oscillation. From the oscillation voltage, transformer T501 generates about 600 V which is necessary for lighting the backli

27、ght. 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 GT-913F SCKO 101 11 C502 (Bottom View) NT-07 T501 CFL1 L501 LHL08TB101K 1 1 12 DG CVDD C104FA C104M 2SD965R2SD965R C501 R501 4.7K Q501 CP1

28、4 Q502 C516 1 12 2332 2 HMBV26BG1W63N/AZ DE0405-979SL180J2K 2 12 2 3 4 5 8 9 7 5 7 CPU (LSI1: GT-913F) 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 detects key velocity by counting the time between first-key input signal FI

29、 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. Then the CPU provides 16-bit serial sound data to the DSP. The CPU also cont

30、rols MIDI input/output and stores sequencer data into the working storage RAM. The following table shows the pin functions of LSI1. .oNniPlanimreTtuO/nIno i t cnuF 10DXTtuOtuptuo l a ng i sIDIM 20DXRnItupn i l ang i sIDIM 30KCStuOtuptuo l a ng i s) f fOrewoPotuA(OPA 5,4 ,31P/DXT 41P/DXR tuO/nIrev i

31、rdDCLehtrofsubataD 61KCStuOtuptuoes l upgn i z i norhcnysZHM1 7CCVAnIecruos)V5+(DDVC 80NAnI . l a n i mretno i t cetedrotpadaCA V0semocebdnase i re t t abybderewop s i draobyekehtnehwV5+ .de t c ennoc s i rotpadaCAnehwno i t cnufOPAeht l ecnacot 91NAnIrednebhc t i pmo r f tupnI 01DNGAnIecruos)V0(dnu

32、orG 11KCBtuOtuptuokco l c t i B 21OStuOtuptuoataddnuosl a i reS 31KCRLtuOtuptuokco l cdroW 41DNGnIecruos)V0(dnuorG 61,511TLX,0TLXtuO/nItuptuo / t up n i kco l czHM03 71CCVnIecruosV5+ 91,811DOM,0DOMnIl a n i mretno i t ce l esedoM 02BTSRnItupn i l ang i steseR 12IMNnItupn i l ang i sNOrewoP 2201P/TNI

33、tuO/nIrev i rdDCLehtrofsubataD 0332 3IF0IF 3IS0IS nIl ang i stup n i yekrof l a n i mreT 83137CK0CKtuO l a ng i snacsyekrof l a n i mreT 0593 9IF4IF 9IS4IS nIl ang i stup n i yekrof l a n i mreT 1501IFnI l a ng i stup n i no t t ubrof l a n i mreT 2532P/01IStuOrev i rdDCLehtrof l ang i se l banep i

34、hC 55352IK0IKnI l a ng i stup n i no t t ubrof l a n i mreT 65BNWMtuOPSDehtrof l ang i se l baneet i rW 677591AM0AMtuOsubsserddA 770BSCMtuOMORecruosdnuosehtroftuptuo l a ng i se l banep i hC 871BSCMtuOdesutoN 972BSCMtuOPSDehtroftuptuo l a ng i se l banep i hC 8 .oNniPlanimreTtuO/nIno i t cnuF 08,313

35、BP0BPnIs l a n i mrettup n i no t t uB 44BPnItup n i kcaJELBANGISSA 5OStuOCADehtroftuptuoataddnuosl a i reS 6OKCWtuOCADehtroftuptuokco l cdroW 73DDVnIecruosV5+ 8TSETdesutoN 9BSERnItupn i l ang i steseR 012SSVnIecruos)V0(dnuorG 21,11TUOX,NIXtuO/nItuptuo / t up n i kco l czHM02 31IKCWnIUPCehtmo r f tu

36、p n i kco l cdroW 41ISnIUPCehtmo r f tup n i ataddnuosl a i reS 51IKCBnIUPCehtmo r f tup n i kco l c t i B 61CNISnItup n i es l upgn i z i norhcnyszHM1 712DDVnIecruosV5+ 52817OI0OItuO/nIsubataD 62BECRtuOMARegaro t s gn i krowehtroftuptuo l a ng i se l banep i hC 723SSVnIecruos)V0(dnuorG 821DAnIsubss

37、erddA 92BEDnIMARegaro t s gn i krowrof l ang i se l baneataD 03BEWnI l a ng i se l baneet i rW 133DDVnIecruosV5+ 232ECnI.ev i t cah g i H . t upn i l ang i se l banep i hC 330DAnIsubsserddA 43B1ECnI.ev i t cawoL . t upn i l ang i se l banep i hC 34,14537OIE0OIEtuO/nIMAR t c e f f eehtrofsubataD ,846

38、4,44,24 16,9515 41AE0AEtuOMAR t c e f f eehtrofsubsserddA 54BECEtuOMAR t c e f f eehtroftuptuo l a ng i se l banep i hC 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. The

39、n the DSP provides the sound data to the DAC. The DSP also controls button input/ output. The following table shows the pin functions of LSI2. .oNniPlanimreTtuO/nIno i t cnuF 08CCVnIecruosV5+ 18DNGnIecruos)V0(dnuorG 28BDRMtuOMORecruosdnuosehtroftuptuo l a ng i se l banedaeR 893851DM0DMtuO/nIsubataD

40、99ELPtuOPSDehtroftuptuo l a ng i steseR 00171PtuO/nIrev i rdDCLehtrofsubataD 9 Pin No.TerminalIn/OutFunction 49EOEBOutRead enable signal output for the effect RAM 50VSS3InGround (0 V) source 60BWEBOutWrite 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 LCD DRIVER (LSI501 : SED1278F0A) The LCD driver can drive a dot matr