Casio_CTK-431_Service_Manual电路图.pdf

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1、ELECTRONIC KEYBOARD CTK-431 CTK-431 MIDI 100 SONG BANK KEYBOARD MUSICAL INFORMATION SYSTEM SONG BANK CONTROLLER POWER/MODE ON OFF FINGERED MAIN VOLUME SYNCHRO/ FILL-IN START/ STOPTEMPOCHORD BOOK ACCOMP VOLUME CASIO CHORD NORMAL M 01234 56789 m7M7dim TONE RHYTHM SONG BANK STATUS MAIN VOLUME TEMPO aug

2、sus4-5add9CLEARRHYTHMTRANSPOSE/ TUNE/MIDI LEFT ON/OFF RIGHT ON/OFF REWSTOPFFTONESONG BANK P L A Y / P A U S E SONG BANK CONTROLLER MUSICAL INFORMATION SYSTEM OUTIN OUTPUT PHONES/DC 9V RadioFans.CN 收音机爱 好者资料库 INDEX CONTENTS Specifications . 1 Block Diagram. 2 Circuit Description . 3 Adjustment . 7 Ma

3、jor Waveforms . 8 Printed Circuit Boards . 9 Schematic Diagrams . 10 Exploded View . 14 Parts List . 15 RadioFans.CN 收音机爱 好者资料库 1 SPECIFICATIONS GENERAL Keyboard:49 standard-size keys, 4 octaves Tones:100 Polyphony:12 notes maximum (6 for certain tones) Auto accompaniment Rhythm patterns:100 Tempo:V

4、ariable (236 steps, = 20 to 255) Chords:2 fingering methods (CASIO CHORD, FINGERED) Rhythm controller:START/STOP, SYNCHRO/FILL-IN Accomp volume:0 to 9 (10 steps) Song bank Tunes:100 Controllers:PLAY/PAUSE, STOP, REW, FF, LEFT ON/OFF, RIGHT ON/OFF Musical dictionary Name display:TONE, RHYTHM, SONG BA

5、NK name/number, keyboard settings name/value Tempo:Tempo value, metronome, synchro standby, beat indicator Chord:Chord name, Chord form Fingering:Fingering indicators, parts, pedal (The pedal indicator is for received MIDI data only.) Song bank status:PLAY, PAUSE, REW, FF Staff:4 octaves with sharp

6、and flat indications Keyboard:4 octaves MIDI:5 multi-timbre receive Other functions Transpose:12 steps (6 semitones to +5 semitones) Tuning:Variable (A4 = approximately 440 Hz 50 cents) Volume:0 to 9 (10 steps) Terminals MIDI terminals:IN, OUT Phones/Output terminal:Stereo standard jack (Output is m

7、onaural.) Output Impedance: 60 Output Voltage: 5 V (RMS) MAX Power supply terminal:9 V DC Power supplyDual power supply system Batteries:6 AA-size batteries Battery life:Approximately 2 hours (SUM-3/R6P)/4 hours (AM3/LR6) AC adaptor:AD-5 Auto power off:Turns power off approximately six minutes after

8、 last key operation. Can be disabled manually. Speaker output:3.0 W (Output is monaural.) Power consumption:9 V - 7.5 W Dimensions (HWD):958 310 132 mm (37-3/4 12-3/16 5-3/16 inches) Weight:Approximately 3.5 kg (7.7 lbs) (without batteries) ELECTRICAL Current drain with 9 V DC: No sound output200 mA

9、 20 % Maximum volume750 mA 20 % with 12 keys C1 to B1 pressed in Synth-Lead 1 Volume: 9 (Max.) Phone output level (Vrms with 8 load each channel): with key A4 pressed in Synth-Lead 195 mV 20 % Speaker output level (Vrms with 4 load each channel): with key C4 pressed in Synth-Lead 11050 mV 20 % Outpu

10、t level (Vrms with 47 K load each channel): with key C1 pressed in Synth-Lead 11100 mV 20 % Minimum operating voltage:5.7 V RadioFans.CN 收音机爱 好者资料库 2 BLOCK DIAGRAM CPU MSM 6755C-17 LSI1 KeyboardButtons LCD LCD Driver KS0066U-10B LSI3 Reset IC IC1 Oscillator X1, Q1 Power Supply Circuit Q101 Q103, D10

11、4 Power Amp. LA4598 IC101 Filter Q105 Speaker (L) Speaker (R) Phones/Output VCAVDDVCCDVDD APO MD0 MD7 MA0 MA17 DC + 9 V IN DB4 DB7 COM1 COM16 SEG1 SEG40 RS R/W E KO8 KO12 KI0 KI6 KO0 KO7 ROM(2M-bit) UM23C2101M 7384/Q LSI2 Power Switch 3 KI0KI1KI2KI3KI4KI5KI6 KO0C2G#2E3C4G#4E5C6 KO1C#2A2F3C#4A4F5 KO2

12、D2A#2F#3D4A#4F#5 KO3D#2B2G3D#4B4G5 KO4E2C3G#3E4C5G#5 KO5F2C#3A3F4C#5A5 KO6F#2D3A#3F#4D5A#5 KO7G2D#3B3G4D#5B5 KO8+0 TempoTempoVolumeVolume DownUpDownUp KO9321 Start/Synchro/ChordAccomp StopFill-inBookVolume KO10654 Transpose/Song RhythmTone TuneBank KO1198 7 FingeredCASIONormalPower Off Chord KO12FFR

13、ight Play/ StopLeftRewind Pause CIRCUIT DESCRIPTION KEY MATRIX NOMENCLATURE OF KEYS C2 C#2D#2F#2 G#2A#2C#3D#3F#3 G#3A#3C#4D#4F#4 G#4A#4C#5D#5F#5 G#5A#5 D2E2F2G2A2B2C3D3E3F3G3A3B3C4D4E4F4G4A4B4C5D5E5F5G5A5B5C6 4 CPU (LSI1: MSM6755C-17) The CPU reads sound data from the ROM in accordance with the pres

14、sed key and the selected tone; the CPU can read rhythm data simultaneously when a rhythm pattern is selected. Then it provides the left and the right channels waveforms separately, by converting the data into the waveforms with two built-in DACs. The CPU also controls key and button input. The follo

15、wing table shows the pin functions of LSI1. Pin No.TerminalIn/OutFunction 1MA14OutAddress bus 2, 3NCONot used 4 19MA0 MA13OutAddress bus 13MRDBOutRead enable signal 17MCSBNot used 20 27MD0 MD7In/OutData bus 28, 29NC1, NC2Not used 30DGNDInGround (0 V) source 31DVCCIn+5 V source 32, 33XTLO, XTLIIn/Out

16、20 MHz clock input/output 34NC3Not used 35RSTBInReset signal input 36P24/RXDMIDI signal input 37P25/TXDMIDI signal output 38NMIInPower ON signal input. Connected to +5 V. 39APOOutAPO (Auto Power Off) signal output 40NC4Not used 41REFHOutTerminal for the internal DAC 42, 43NC5, NC6Not used 44DAOROutS

17、ound waveform signal output 45NC7Not used 46AVdacIn+5 V source for the internal DAC 47DAOLOutLeft channel sound waveform output 48REFLOutTerminal for the internal DAC and ADC 49AGdacInGround source for internal DAC 50AGadcInGround source for internal ADC 51ANIInNot used 52AVadcIn+5 V source for the

18、internal ADC 53NC8Not used 54MOD0InMode selection terminal. Connected to +5 V. 55, 56MOD1, MOD2InMode selection terminal. Connected to ground. 57P40Not used 58 64KI0/P30 KI7/P36InTerminals for key/button input signal 65KI7/P37Not used 66 73KO0/P50 KO7/P57OutTerminals for key scan signal 5 Pin No.Ter

19、minalIn/OutFunction 74 77DB4 DB7OutData bus for the LCD driver 78NC9Not used 79LVCCIn+5 V source 80 84KO8 KO12OutTerminals for button scan signal 85 87P65 P67Not used 88RSOutControl signal for the LCD driver 89R/WOutRead/Write signal for the LCD driver 90EOutChip enable signal for the LCD driver 91

20、95P73 P77Not used 96LGNDInGround source 97, 100MA18, MA15OutAddress bus LCD DRIVER (LSI3: KS0066U-10B) The 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-

21、in display data RAM. In accordance with command from the CPU, the LSI is capable of displaying up to 16 characters simultaneously. The following table shows the pin functions of LSI3. Pin No.TerminalIn/OutFunction 1 22, SEG1 SEG40OutSegment signal output 63 80 23VSSGND (0 V) source Terminals for the

22、 built-in clock pulse generator. The 24, 25OSC1, OSC2In/Outexternal resistor connected determines the oscillation frequency. LCD drive voltage input. 26 30V1 V5InThose voltages are used for generating the stepped pulse of the LCD drive signals. 31, 32LP, XCLSNot used 33VDDInDVDD (+5 V) source 34, 35

23、FR, DONot used 36RSIn Data/command determination terminal. High: data, Low: command 37R/WInRead/Write terminal. High: read, Low: write Chip enable signal. 38EInHigh: enable, the writing is done at fall edge. Low: disenable 39 42DB0 DB3Not used. Connected to GND (0 V) 43 46DB4 DB7In/OutData bus 47 62

24、COM1 COM16OutCommon signal/output 6 FILTER BLOCK Since the sound signals from the CPU is stepped waveforms, the filter block is added to smooth the waveforms. POWER AMPLIFIER (IC101: LA4598) The power amplifier is a two-channel amplifier with standby switch. The following table shows the pin functio

25、n of IC101. Pin No.TerminalIn/OutFunction 1Power GNDInGround (0 V) source 2Ch1 B.S.Terminal for a bootstrap capacitor 3Ch1 OUTOutChannel 1 output 4VCCIn+9 V source 5Ch1 N.F.InNegative feedback input 6Ch1 INInChannel 1 output 7D.CTerminal for a bootstrap capacitor 8Pre GNDInGround (0 V) source 9Stand

26、 byInPower control signal input. 0 V:Off, +9 V: On 10Ch2 INInNot used. Connected to ground (0 V) 11Ch2 N.F.InNegative feedback input 12Ch2 OUTOutChannel 2 output 13Ch2 B.S.Terminal for a bootstrap capacitor 14NCNot used Amp. LA4598 Filter Block CPU MSM6755C-17 7 ItemMeasuring Instrument Vop voltage

27、settingVoltmeter 3) Equipment connection/Procedure Vop voltage setting Input Connection Input Point Input Signal Adjust Output Connection Output Point Adjust for VR1VoltmeterTP1Adjust for 4.1 4.0 V reading on voltmeter under the temparature 20 25 C. Make fine adjustment ac- cording to the following

28、in- struction. Watching the LCD at a 36.6 angle to the horizontal, adjust Vop voltage so that unenergized segments are seen dimly. ADJUSTMENT MAIN PCB 1) Items to be adjusted: 2) Adjustment and Test Point Locations (TOP VIEW)(BOTTOM VIEW) TP1 VR1 36.6 LCD Eye Output SetVoltmeter TP1 8 MAJOR WAVEFORM

29、S 1 Clock pulse MSM6755C-17 pin 32 1 2 +5 V source DVDD JB connector pin 4 3 APO signal JB connector pin 8 2 3 4 Button scan signal KO6 JA connector pin 14 5 Button scan signal KO7 JA connector pin 15 4 5 6 LCD common signal COM9 KS0066U-10B pin 55 7 LCD common signal COM10 KS0066U-10B pin 56 6 7 9

30、3 2 76 4 5 1 Top View PRINTED CIRCUIT BOARDS Main PCB JCM444-MA1M Bottom View 10 SCHEMATIC DIAGRAMS Main PCB JCM444-MA1M 1 54 2 3 7 6 11 Sub PCBs JCM444-MA2M/MA3M 12 Keyboard PCBs JCM4911K-KY1M/KY2M 13 LCD SegmentCommon COM7 COM6 COM5 COM4 COM3 COM2 COM1 SEG2 COM11 COM12 SEG39 SEG40 COM10 COM9 COM14

31、 COM15 COM16 SEG11 NC NC NC COM16 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG21 SEG22 SEG23 SEG24 SEG25 SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 SEG32 SEG33 SEG34 SEG35 SEG36 SEG37 SEG38 SEG39 SEG40 SEG1 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 COM15 COM14 COM13 COM12 COM1

32、1 COM10 COM9 COM16 COM15 COM14 COM13 COM7 COM6 COM5 COM4 COM3 COM2 COM1 SEG2 COM11 COM12 SEG39 SEG40 COM10 COM9 COM14 COM15 COM16 SEG11 NC NC NC COM16 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG21 SEG22 SEG23 SEG24 SEG25 SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 SEG32 SEG33 SEG34 SEG35 SEG36 SEG37 SEG38

33、SEG39 SEG40 SEG1 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 COM15 COM14 COM13 COM12 COM11 COM10 COM9 COM16 COM15 COM14 COM13 14 EXPLODED VIEW 18 17 19 22 6 R-1 5 12 7 10 9 1113 14 15 16 8 1 2 23 4 21 20 4 R-3 R-5 3 R-4 R-2 15 Notes:This parts list does not include the co

34、smetic 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 and supply, refer to the GUIDEBOOK for Spare par

35、ts Supply, published seperately. 3.The numbers in item column correspond to the same numbers in drawing. PARTS LIST CTK-431 16 Item Code No. Part Name Specification QR Main PCB 1 6926 7070 PCB/ASSY (MA1M) M240832*1 1 B LSI1 2012 5603 LSI/MC (CPU) MSM6755B-17 1 A LSI2 2012 5611 LSI/MASK-ROM UM23C2101

36、M-7384/Q 1 A LSI3 2012 5935 LSI/LCD DRIVER KS0066U-10B 1 A IC1 2012 1883 IC/MOS (RESET IC) RN5VD40AA-TR 2 B Q1,Q2 2252 1239 TRANSISTOR 2SC4081T106Q 1 B Q3 2250 1162 TRANSISTOR 2SA1576AT106R 1 B VR1 2775 0994 POTENTIOMETER EVN-D8AA03B53 1 B X1 2590 2100 OSCILLATOR/CERAMIC CSACS20.00MX040-TC 1 B Sub P

37、CB 2 6927 5070 PCB/ASSY (MA2,3M) M241005*1 1 B IC101 2114 2891 IC/LINEAR (POWER AMP) LA4598 1 A IC102 2252 1248 IC/POTOCUPPLER HCPL-261A 1 A Q102 2250 1591 TRANSISTOR 2SB1237TV2R 1 A Q103Q105 2250 1592 TRANSISTOR 2SC1740STPR 3 A Q101 2250 1593 TRANSISTOR 2SD1858TV2R 1 A D101 2390 3021 DIODE/SHOTTKY

38、SRT14 1 C D102 2390 3018 DIODE 1T2 1 C D104D113 2390 1344 DIODE 1SS133T-77-T 10 C D103 2360 2044 DIODE/ZENER MTZJ6.2A-T77-T 1 A J101 3612 0665 JACK (PHONE) YKB21-5006 1 B J102 3501 7049 JACK (POWER) HEC2305-01-330 1 B J103 3501 4816 JACK (MIDI) YKF51-5051 1 B Keyboard PCBs 3 6926 7050 PCB/ASSY M1407

39、49*1 1 C D701 - D749 2301 0101 DIODE 1S2473T-77-T 49 B Mechanical Parts 4 3831 0665 SPEAKER 10G42AFA 1 B 5 3335 6823 LCD LD-B10272E 1 B 6 6926 7200 RUBBER/INTERCONNECTOR M440584-2 2 C 7 6927 6040 SPACER/455A M440810-1 1 C 8 6927 6050 SPACER/455B M440811-1 1 C 9 6927 6060 FILM/LEXAN M440812-1 1 C 10

40、6927 5060 EL M340996*1 1 B 11 6909 5890 SWITCH/SLIDE KONB CSB-12D 1 B 12 6921 5031 KNOB M311859-1 1 B 13 6927 6070 RUBBER/BUTTON M240796-2 1 B 14 6927 6080 RUBBER/BUTTON M240797-2 1 B 15 6927 6090 RUBBER/BUTTON M240798-2 1 B 16 6927 6100 RUBBER/BUTTON M240799-2 1 B 17 6922 2720 KEY SET/LT WHITE M312

41、118*1 3 A 18 6922 2730 KEY SET/LT WHITE M312118*2 1 A 19 6922 2740 KEY SET/LT BLACK 10P M111726-1 2 A 20 6926 0670 RUBBER/CONTACT M240549-1 3 A 21 6926 0680 RUBBER/CONTACT M240550-1 1 A 22 6906 9611 PANEL/DISPLAY M340789-2 1 C 23 6925 4500 COVER/BATTERY M340528*1 1 B Accessory 6906 8752 STAND/NOTE M340629B*2 1 B Notes: Q Quantity per unit R Rank CASIO TECHNO CO.,LTD. Overseas Service Division Nishi-Shinjuku Kimuraya Bldg. 1F 5-25, Nishi-Shinjuku 7-Chome Shinjuku-ku, Tokyo 160-0023, Japan