Casio_WK-1500_Service_Manual电路图.pdf

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1、GM SOUND KEYBOARD WK-1500 WK-1500 PITCH? BEND ? RadioFans.CN 收音机爱 好者资料库 2 CONTENTS Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Circuit Descript

2、ion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Major Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Printed Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Schematic Diagrams

3、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 SPECIFICATIONS GEN

4、ERAL Number of keys:76 Polyphonic:32-note Digital effects:10 REVERB 1, REVERB 2, REVERB 3, CHORUS, TREMOLO, PHASE SHIFTER, ORGAN SPEAKER, ENHANCER, FLANGER, LOUDNESS Pads:180 (six pads 30 sets) Phrases (22 sets), drums/percussion (8 sets) Melody tone matches chord Demo tunes:3, sequential repeat pla

5、yback Auto-accompaniment Rhythm patterns:100 Tempo:Adjustable (216 levels, q = 40 to 255) Chords:3 types (CASIO Chords, Fingered, Full-Range Chords) Pads:Rhythm, bass, Chord 1, Chord 2, Chord 3 (adjustable on/off, tone, volume, pan, effect send, fine tune, coarse tune, expression settings) Magical p

6、resets: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 meth

7、od, touch 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, MUTE MIDI monitor:16 LED monitor Song memory Number of songs:2 Tracks:6 (individual adjustmen

8、t of on/off, tone, volume, pan, effect send, fine tune, coarse tune, expression) Type:Real-time Capacity:Approximately 5,200 notes 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 Tone Expan

9、der:Individual adjustment of volume, tuning, pan, effect send for each layer and split tone RadioFans.CN 收音机爱 好者资料库 3 MIDI:16-timbre multi-timbre receive (General MIDI Level 1) Built-in speakers:12 cm diameter 2 (output: 5 W + 5 W) Input/Output Jacks Power supply:12 V DC Headphones:Stereo standard j

10、ack Output jacks:Output impedance: 100 Output voltage 2.5 V (RMS) MAX Assignable Jack:Standard jack (sustain, sostenuto, soft, rhythm start/stop) MIDI terminals:IN, OUT Auto power off:Approximately 6 minutes after the last operation Power source:2-way AC or DC source AC: AC adaptor DC: 6D size dry b

11、atteries Power consumption:18 W Dimensions (HWD):116.1 30.2 11.0 mm (45-3/4 11-7/8 4-5/16 inches) Weight:6.8 kg (15.0 lbs) excluding batteries ELECTRICAL Current drain with 9 V DC: No sound output480 mA 20% Maximum volume with 10 polyphonic notes in tone No. 0811720 mA 20% Volume; maximum Phone outp

12、ut level (Vrms with 8 load each channel):Left channel 175 mV 20% with key C2 pressed in tone No. 042 Line output level (Vrms with 47 k load each channel):Left channel 1420 mV 20% with key C2 pressed in tone No. 042 Minimum operating voltage:12.0 V RadioFans.CN 收音机爱 好者资料库 4 KC0 ? KC7 SI0 SI7 FI0 FI7

13、Key Controller? LSI107? HG52E35P Working Storage RAM? (64K-bit)? LSI105? SRM2264LM90-B? ? KO1 KO3 LED driver? IC371? BA612 LS0 ? LS7 Buttons KI1 KI5 Power Switch IN EA0 EA14 ED0 ED7 DSP? LSI102? HG51B115FD RA0 RA19 RD0 RD15 Sound Source ROM? (16M-bit)? LSI101? TC5316200CF-C112? ? WCK1 SLOP BCK D/A C

14、onverter? LSI104? UPD6376GS Filter? IC101 Main? Volume Power Amplifier? IC402? LA4598 CPU? LSI14? HD6433294A19F Keyboard A0 A14 POWER Power Supply Circuit? IC401, Q401 Q405 VCCAVDDVDD LVDD DVDD VC Effect RAM? (256K-bit)? LSI103? LC33832M-70? ? D0D7 Speakers Output A0 ? A14 A0 A3 A0 A2 7-seg. LED? LE

15、Ds LED driver? Q104 Q111 KO Signal ? Generator IC102? TC74HC174AF La Lg, Lp MIDI OUT Reset IC? IC5? RH5VL36AA P40 P41 KO0 ? KO5 Filter? IC101 RESET BLOCK DIAGRAM 5 CIRCUIT DESCRIPTION KEY MATRIX KC0KC1KC2KC3KC4KC5KC6KC7 FI0E1 (1)F1 (1)F#1 (1)G1 (1)G#1 (1)A1 (1)A#1 (1) SI0E1 (2)F1 (2)F#1 (2)G1 (2)G#1

16、 (2)A1 (2)A#1 (2) FI1B1 (1)C2 (1)C#2 (1)D2 (1)D#2 (1)E2 (1)F2 (1)F#2 (1) SI1B1 (2)C2 (2)C#2 (2)D2 (2)D#2 (2)E2 (2)F2 (2)F#2 (2) FI2G2 (1)G#2 (1)A2 (1)A#2 (1)B2 (1)C3 (1)C#3 (1)D3 (1) SI2G2 (2)G#2 (2)A2 (2)A#2 (2)B2 (2)C3 (2)C#3 (2)D3 (2) FI3D#3 (1)E3 (1)F3 (1)F#3 (1)G3 (1)G#3 (1)A3 (1)A#3 (1) SI3D#3

17、 (2)E3 (2)F3 (2)F#3 (2)G3 (2)G#3 (2)A3 (2)A#3 (2) FI4B3 (1)C4 (1)C#4 (1)D4 (1)D#4 (1)E4 (1)F4 (1)F#4 (1) SI4B3 (2)C4 (2)C#4 (2)D4 (2)D#4 (2)E4 (2)F4 (2)F#4 (2) FI5G4 (1)G#4 (1)A4 (1)A#4 (1)B4 (1)C5 (1)C#5 (1)D5 (1) SI5G4 (2)G#4 (2)A4 (2)A#4 (2)B4 (2)C5 (2)C#5 (2)D5 (2) FI6D#5 (1)E5 (1)F5 (1)F#5 (1)G

18、5 (1)G#5 (1)A5 (1)A#5 (1) SI6D#5 (2)E5 (2)F5 (2)F#5 (2)G5 (2)G#5 (2)A5 (2)A#5 (2) FI7B5 (1)C6 (1)C#6 (1)D6 (1)D#6 (1)E6 (1)F6 (1)F#6 (1) SI7B5 (2)C6 (2)C#6 (2)D6 (2)D#6 (2)E6 (2)F6 (2)F#6 (2) FI8G6 (1)G#6 (1)A6 (1)A#6 (1)B6 (1)C7 (1)C#7 (1)D7 (1) SI8G6 (2)G#6 (2)A6 (2)A#6 (2)B6 (2)C7 (2)C#7 (2)D7 (2

19、) FI9D#7 (1)E7 (1)F7 (1)F#7 (1)G7 (1) SI9D#7 (2)E7 (2)F7 (2)F#7 (2)G7 (2) Note: Each key has two contacts, the first conatct (1) and second contact (2). Key Second contact (2)First contact (1) FI KC SI 6 NameVoltageFor operation of VDD+5.2 VCPU, Reset IC, Working storage RAM, KO signal generator DVD

20、D+5.3 VDSP, Key touch LSI, Sound source ROM, Effect RAM AVDD+5.1 VDAC, Filter LVDD+5.2 VLED Driver VCC+12 VPilot lamp VC+12 VPower amplifier POWER SUPPLY CIRCUIT The power supply circuit generates six voltages as shown in the following table. VDD voltage is always generated. The others are controlle

21、d by APO signal output from the CPU. NOMENCLATURE OF KEYS F#1 F1 G#1A#1C#2 D#2F#2G#2A#2C#3 D#3F#3G#3A#3C#4 D#4F#4G#4A#4C#5 D#5F#5G#5A#5C#6 D#6F#6G#6A#6C#7 D#7F#7 E1G1 A1 B1 C2 D2 E2 F2 G2 A2 B2 C3 D3 E3 F3 G3 A3 B3 C4 D4 E4 F4 G4 A4 B4 C5 D5 E5 F5 G5 A5 B5 C6 D6 E6 F6 G6 A6 B6 C7 D7 E7 F7 G7 KI1KI2K

22、I3KI4KI5KI6KI7 KO0SPLITLAYERCH7/CHORD2 CH8/ CHORD3 CH9/BASS CH10/ RHYTHM KO1 TRANSPOSE /TUNE MAGICAL PRESET MIDIRHYTHMTONEPAD KO2CH4/LOWER2CH5/PAD CH6/ CHORD1 CH2/ UPPER2 CH3/ LOWER1 KO3369DEMO TOUCH RESPONSE DIGITAL EFFECT KO4258 CH1/ UPPER1 147 KO5 ACM VOLUME SONG MEMORY MODULATIONMIXER0+ KO6 SYNC

23、H/ ENDING VAR./FILL-IN NORMAL/ FILLIN INTROFED KO7MODEABC START/ STOP TEMPO DOWN TEMPO UP KO8CH11/TR1CH12/TR2CH13/TR3CH14/TR4CH15/TR5CH16/TR6 KO9 BANK SELECT ABCDESTORE BUTTON MATRIX 7 CPU (LSI14: HD6433294A19F) The 16-bit CPU contains a 32k-bit ROM, a 1k-bit RAM, seven 8-bit I/O ports, an A/D conve

24、rtor and MIDIl interfaces. The CPU accesses to the working storage RAM, the DSP and the key touch LSI. 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: HG51B15

25、5FD-1) Upon receipt of note numbers and their velocities, the DSP reads sound and velocity 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

26、melody, chord, bass, and percussion to the DAC. When an effect selected, the DSP adds 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 sign

27、al output 4-RESETInReset signal input 5-NMIInPower ON trigger signal input 6VCCIn+5 V source 7-STBYInStandby signal input. Connected to +5 V. 8VSSInGround (0 V) source 9, 10XTAL, EXTALIn20 MHz clock input 11, 12MD1, MD0InMode selection input 13AVSSInGround (0 V) source 14P70InAnalog input terminal f

28、or the pitch bend wheel 15 21P71 P77OutInput terminals from keys (KI1 KI7) 22AVCCIn+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 57P40OutClock for KO signal generator 58P41OutKO signal data 59P42Ou

29、tAPO signal output 60P43OutRead enable signal output 61P44InWrite enable signal output 62P45Not used 63P46Out10 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

30、 24.576 MHz clock check point 13VCC6In+5 V source 14CK0InClock input. Connected to terminal 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 inpu

31、t 22 25CA0 CA3InAddress bus 26CE0InNot used. Connected to ground. 27CWRBInWrite enable 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 59RA22Out

32、Chip select signal for the sound source ROM 60RA21OutNot used 61 73 75 82 74GND5InGround (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+

33、5 V source 94, 95 97 105 107, 109 110, 112 96EWEBOutWrite enable signal for the effect 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 DSP? ? LSI11? ? HG51B155FD-1 Effect RAM (256K-bit)? LSI13? LC33832M-70-TL

34、M Sound Source ROM? LSI12? MX23C2410MC-12CA51 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 CLK LRCK CCSB LSIB RDAB

35、 WRAB RESET CRDB CWRB RESB KO signal? generator? ? LSI17? ? UPD65611GB Block diagram of DSP and DAC circuit Pin No.TerminalIn/OutFunction 106EOEBOutRead enable signal output for the effect RAM 108VCC7In+5 V source 111ECEBOutChip select signal output for the effect RAM 113 117ED11 ED15Not used 118VCC

36、4In+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 10 CRDB? CWRB? CKI? CCSB? ? ? ? CD0? ? CD7? ? CA0 CA2 First contact Second contact KC0? ? KC7? ? ?

37、FI0? ? ? ? FI9 SI0? ? ? ? SI9 Key input signal Key scan signal Data bus Address bus Key Controller? LSI16? HG52E35P Keyboard FI SI KC RDAB WRAB CLKA HGB RESET RESB LSI17? ? HG52E35P Pin No.TerminalIn/OutFunction 1SELInMode selection terminal. Connected to ground. 2D.GNDInGround (0 V) source for the

38、internal digit circuit 3NCNot used. 4DVDDIn+5 V source for the internal digital circuit 5A.GNDInGround (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

39、 channel reference voltage terminal 11L.OUTOutLeft channel sound waveform output 12A.GNDInGround (0 V) source for the left channel 13LRCKInWord clock input 14LRSELInNot used. Connected to ground. 15SIInSound data input 16CLKInBit clock input DAC (IC11: UPD6376GS) The DAC receives 16-bit serial data

40、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 the data into analog waveforms by each channel and output them separately. The following table shows the pin functions of IC11. KEY CONTROLLER (LSI16

41、: 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 velocity. The note number and its velocity data are read at regular intervals by the

42、 CPU. 11 Pin No.TerminalIn/OutFunction 1REQBOutNot used. FI8 FI10, SI8 SI10 4VCCIn+5 V source 5CRDBInRead enable signal input 6CWRBInWrite enable signal input 7CCSBInChip select signal input 8, 9, 11T, STBY, WInNot used. Connected to +5 V. 10RESBInReset signal input 12CKIIn10 MHz clock input 13, 14T

43、MD, TSTInNot used. Connected to ground. 15CKOOutNot used. 16GNDInGround (0 V) source 17XINInNot used. Connected to ground. 18XOUTOutNot used. 19TRESIn Not used. Connected to ground. 20 23, 25 28CD0 CD7In/OutData bus 24GNDIn Ground (0 V) source 29 31CA0 CA2InAddress bus 32VCCIn +5 V source 33 39, 41

44、43,FI0 FI9, 53 55, 57 63SI0 SI9 40VCCIn +5 V source 44 47, 49 52KC0 KC7OutKey scan signal 48, 56GNDIn Ground (0 V) source 64VCCIn +5 V source 2, 3, 60 63In In Not used. Connected to +5 V. Key input signal input The following table shows the pin functions of LSI16. AVDD 1 K1 K1 K C471B C103(H) AGAG 1

45、 K AG To main volume - + IC203? M5218APR 16 V 10 ? C333(H) Q210/211? 2SC1740 10 K 50 V 0.47 ? From the DAC AVDD FILTER BLOCK Since the sound signals from the DAC are stepped waveforms, the filter block is added to smooth the waveforms. 12 VDD Battery set RESET CPU? LSI14? HD6433294A19F Reset IC? IC1

46、3? RH5VL36AA Working Storage RAM? LSI15? TC55257DFL-70L DSP? LSI11? HG51B155FD-1 Key Controller? LSI16? HG52E35P DVDD DVDD DVDD VDD VDD -RESET POWER From power switch KO Signal Generator? LSI17? UPD65611GB-019-3BA -NMI To power supply circuit APO P42 POWER AMPLIFIER (IC201: LA4620) The power amplifi

47、er is a two-channel amplifier with standby switch. 6 162101113 12 Pre-drive? Amp. Input? Amp. Power? Amp. + ? Pre-drive? Amp. Input? Amp. Power? Amp. + ? 9 7 3 5 + ? Input? Amp. Pre-drive? Amp. Power? Amp. + ? Input? Amp. Pre-drive? Amp. Power? Amp. 4 19 20 21 22 23 1 18 17 15 14 8 RL Short? Protect

48、or RL Short? Protector Terminal? Protection? Circuit Pop Noise? Prevention? Circuit Ripple? Filter IN11+ IN11? IN12? IN21+ IN21? IN22? NCDCMUTEADJ Boot11 OUT11 PoGND1 OUT12 Boot12 VCC1 Boot21 OUT21 PoGND2 OUT22 Boot22 VCC2 PriGND RESET CIRCUIT When batteries are set or an AC adapter is connected, th

49、e 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 signal. The CPU provides APO signal to the power supply circuit and raises RESET signal to +5 V to reset the DSP, the key controller and the KO signal generator. IC17? UPD65611GB-019-3BA LG CPU? ? LSI14? ? HD6433294A19F LVDD P40? ? P41 KO0 KO3, KO5 IC301? BA612? LED