Casio_CTK-541_Service_Manual电路图.pdf

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1、ELECTRONIC KEYBOARD CTK-541 JULY.1999 CTK-541 E E E RadioFans.CN 收音机爱 好者资料库 INDEX CONTENTS Specifications . 1 Block Diagram. 3 Circuit Description . 4 Adjustment . 8 Major Waveforms . 10 Printed Circuit Boards . 11 Schematic Diagrams . 15 Exploded View . 19 Parts List . 20 RadioFans.CN 收音机爱 好者资料库 1

2、SPECIFICATIONS GENERAL Keyboard:61 standard-size keys, 5 octaves (with touch response on/off) Tones:100 Polyphony:16 notes maximum (8 for certain tones) Auto accompaniment Rhythm patterns:100 Tempo:Variable (236 steps, = 20 to 255) Chords:2 fingering methods (CASIO CHORD, FINGERED) Rhythm controller

3、: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 (ACCOMP), RIGHT ON/ OFF (MELODY) Display Name display:TONE, RHYTHM, SONG BANK name/number, keyboard settings name/value Tempo:Tempo value, metronome, synchro standby, b

4、eat indicator Chord:Chord name, Chord form Fingering:Fingering indicators, parts, pedal Song bank status:PLAY, PAUSE, REW, FF Staff:5 octaves with sharp and flat indications Keyboard:5 octaves MIDI:5 multi-timbre receive Other functions Transpose:12 steps (6 semitones to +5 semitones) Tuning:Variabl

5、e (A4 = approximately 440 Hz 50 cents) Volume:0 to 9 (10 steps) Terminals MIDI terminals:IN, OUT Sustain terminal:Standard jack Phones/Output terminal:Stereo standard jack Output Impedance: 50 Output Voltage: 3.5 V (RMS) MAX Power supply terminal:9 V DC Power supplyDC 9 V Batteries:6 D-size batterie

6、s Battery life:Approximately 5 hours on manganese batteries Auto power off:Turns power off approximately six minutes after last key operation. Enabled under battery power only, can be disabled manually. Speaker output:2.0 W + 2.0 W Power consumption:9 V - 7.7 W Dimensions (HWD):961 376 143 mm (37-7/

7、8 14-13/16 5-5/8 inches) Weight:Approximately 5.7 kg (12.6 lbs) (without batteries) RadioFans.CN 收音机爱 好者资料库 2 ELECTRICAL Current drain with 9 V DC:NominalLimit No sound output330 mA330 mA 20% Maximum volume990 mA990 mA 20% with 16 keys C1 to D3 pressed in Synth-Lead 1 Volume: Maximum, Touch response

8、: ON(Velocity MAX) Phone output level (Vrms with 8 load each channel):L 240mV240 mV 20% with key C3 pressed in Synth-Lead 1R 250mV250 mV 20% Speaker output level (Vrms with 4 load each channel): with key G1 pressed in Synth-Lead 1L/R 2500mV2500 mV 20% Output level (Vrms with 47 K load each channel):

9、L 2300mV2300 mV 20% with key C2 pressed in Synth-Lead 1R 2400mV2400 mV 20% Minimum operating voltage:6.3V7.0V 3 BLOCK DIAGRAM CPU GT913F(T) LSI1 KeyboardButtons LCD LCD Driver KS0066U-10B LSI3 Reset IC UPD6379GR-E1 IC1 Oscillator X1, Q1 Power Supply Circuit Q201 Q203, Q207, Q208, D205 Power Amp. TA8

10、248K IC201 Filter (L) Q206 Filter (R) Q205 Phone/Output VCVCCDVDD AVDD APO DC + 9V IN DB4 DB7 MIDI IN MIDI OUT COM1 COM16 SEG1 SEG40 RS R/W E KI0,KI1 FI8FI10 FI0 FI7 KC0 KC7 MD0 MD15 MA0 MA19 ROM(8M-bit) MSM538002E- N8GS - KDR1 LSI2 Power Switch 4 CIRCUIT DESCRIPTION KEY MATRIX NOMENCLATURE OF KEYS

11、KI0KI1KI2KI3KI4KI5KI6KI7 KO0C2G#2E3C4G#4E5C6G#6 KO1C#2A2F3C#4A4F5C#6A6 KO2D2A#2F#3D4A#4F#5D6A#6 KO3D#2B2G3D#4B4G5D#6B6 KO4E2C3G#3E4C5G#5E6C7 KO5F2C#3A3F4C#5A5F6 KO6F#2D3A#3F#4D5A#5F#6 KO7G2D#3B3G4D#5B5G6 KO8+0 KO9321 KO1065 4RhythmTone KO11987FingeredNormalOff KO12FFRightStopLeftREW Tempo Down Tempo

12、 Up Start/ Stop Synchro/ Fill-In Chord Book Accomp Volume Transpose/ Tune/MIDI Song Bank CASIO Chord Play/ Pause Volume Down Volume Up 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 5 CPU

13、 (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 and second-key SI from the keyboard. The CPU reads sound data and velocity data from

14、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 controls MIDI input/output and stores sequencer data into the working storage RAM. The fol

15、lowing table shows the pin functions of LSI1. Pin No.TerminalIn/OutFunction 1TXD0OutMIDI signal output 2RXD0InMIDI signal input 3SCK0OutAPO (Auto Power Off) signal output 4, 5 TXD/P13, In/OutData bus for the LCD driver RXD/P14 6SCK1Out1 MHZ synchronizing pulse output 7AVCCInCVDD (+5 V) source AC ada

16、ptor detection terminal. 8AN0In+5 V when the keyboard is powered by batteries and becomes 0 V to cancel the APO function when AC adaptor is connected. 9AN1InInput from pitch bender 10AGNDInGround (0 V) source 11BCKOutBit clock output 12SOOutSerial sound data output 13LRCKOutWord clock output 14GNDIn

17、Ground (0 V) source 15, 16XLT0, XLT1In/Out30 MHz clock input/output 17VCCIn+5 V source 18, 19MOD0, MOD1InMode selection terminal 20RSTBInReset signal 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 KC7OutTer

18、minal for key scan signal 39 50 FI4 FI9 InTerminal for key input signal SI4 SI9 51FI10InTerminal for button input signal 52SI10/P23OutChip enable signal for the LCD driver 53 55KI0 KI2InTerminal for button input signal 56MWNBOutWrite enable signal for the DSP 57 76MA0 MA19OutAddress bus 77MCSB0OutCh

19、ip enable signal output for the sound source ROM 78MCSB1OutNot used 79MCSB2OutChip enable signal output for the DSP 6 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 sign

20、al output for the DSP 100P17In/OutData bus for the LCD driver 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-in display

21、 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 KS0066U-10B. Pin No.TerminalIn/OutFunction 1 22, 63 80 23VSSGND (0 V) source Terminals for the built-in clock pulse generator. The e

22、xternal 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, 35FR, DONot used Data/command determination terminal. High: da

23、ta, 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 62COM1 COM16OutCommon signal/output SEG1 SEG40OutSegment signal outpu

24、t 24, 25OSC1, OSC2In/Out 36RSIn 7 FILTER BLOCK Since the sound signals from the CPU is stepped waveforms, the filter block is added to smooth the waveforms. POWER AMPLIFIER (IC201: TA8248K) The power amplifier is a two-channel amplifier with standby switch. The following table shows the pin function

25、 of IC201. Pin No.TerminalIn/OutFunction 1NCNot used 2B.S.2Terminal for a bootstrap capacitor 3OUT2OutChannel 2 output 4VCCIn+9 V source 5OUT1OutChannel 1 output 6B.S.1Terminal for a bootstrap capacitor 7Power GNDInGround (0 V) source 8Stand byInPower control signal input. 0 V: Off, +9 V: On 9DCTerm

26、inal for a decoupling capacitor 10NF1InNegative feedback input 11IN1InChannel 1 input 12IN2InChannel 2 input 13NF2InNegative feedback input 14, 15Pre GNDInGround (0 V) source Amp. TA8248K Filter Block CPU MSM6755B-17 8 ADJUSTMENT MAIN PCB 1) Items to be adjusted: 2) Adjustment and Test Point Locatio

27、ns ItemMeasuring Instrument Vop voltage settingVoltmeter VR1 (BOTTOM VIEW) Test point (TOP VIEW) 9 Output SetVoltmeter CP3-CP4 3) Equipment connection/Procedure Vop voltage setting Input Connection Input Point Input Signal Adjust Output Connection Output Point Adjust for VR1VoltmeterCP3-CP4 Adjust f

28、or 3.90 4.00V read- ing on voltmeter under the temparature 20 25 C. Make fine adjustment accord- ing to the following instruc- tion. Watching the LCD at a 50 angle to the horizontal, adjust Vop voltage so that unenergized segments are seen dimly. 50 LCD Eye 10 MAJOR WAVEFORMS 1 Clock pulse GT913F(T)

29、 pin 15 1 2 Power source CVDD JD connector pin 13 3 APO signal JD connector pin 12 2 3 4 Sound waveform (R-ch) Tone:Whistle (59) JD connector pin 6Key:A4 5 Sound waveform (L-ch) Volume: Max. JD connector pin 5 4 5 6 JB connector pin 1 7 JB connector pin 2 6 7 8 LCD common signal COM6 KS0066U-10B pin

30、 52 9 LCD common signal COM7 KS0066U-10B pin 53 8 9 11 PRINTED CIRCUIT BOARDS Main PCB JCM456-MA1M Main PCB JCM456-MA1M Top View Bottom View 178 6 6 5 2 4 3 12 Sub PCB JCM453-MA2M Top View Bottom View Sub PCB JCM453-MA2M 13 Console PCB JCM453-CN1 Top View Bottom View Console PCB JCM453-CN1 14 Keyboa

31、rd PCB JCM618T-KY1M Keyboard PCB JCM618T-KY2M Bottom View Top View Top View Bottom View Keyboard PCB JCM618T-KY2M Keyboard PCB JCM618T-KY1M 15 SCHEMATIC DIAGRAMS Main PCB JCM456-MA1M 1 6 7 2 3 4 5 9 8 16 Sub PCB KDM453-MA2M 17 Console PCBs JCM453-CN1 18 Keyboard PCBs JCM618T-KY1M / KY2M 19 EXPLODED

32、VIEW 22 33 14 15 29 28 26 27 24 25 30 23 14 15 37 16 3 7 6 9 8 13 34 5 4 12 38 4 20 20 19 2118 35 21 17 2 1 ?9 3?8 ?10 ?18 R-4 R-4 R-1 15 34 31 36 32 R-5 R-3 R-2 10 10 34 34 11 37 20 Notes:This parts list does not include the cosmetic parts, which parts are marked with item No. R-X in the exploded v

33、iew. 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 parts Supply, published seperately. 3.The numbers in item column correspond

34、 to the same numbers in drawing. PARTS LIST CTK-541 PARTS PRICE LIST CTK-541 NItemCode No.Part NameSpecificationQPRICE CODER Main PCB N16928 2120PCB/ASSY (MA1M)M241173*11DEB D1-D42775 2079DIODE/CHIPDA227TL4AAC LSI12012 5005LSIGT913F(T)1BOA NLSI22012 6501LSI/MCMSM538002E-S1GS-KDR11AVA LSI32012 5935LS

35、I/LCD DRIVERKS0066U-10B1AVA IC12105 4746LSIUPD6379GR-E11AOB IC22012 1883IC/MOSRN5VD40AA-TR1AEB Q1,Q22253 0308TRANSISTOR2SD1119-R(TX)2ACB Q32250 1169TRANSISTOR2SA1576AT106R1AAB Q4,Q7,Q8,Q112252 0637TRANSISTOR2SC4081T106R4AAB VR12775 0994POTENTIOMETEREVND8AA03B531AAB X12590 2774OSCILLATOR/CERAMICCSACV

36、30.00MXJ0401AEB SUB PCB ASSY 26927 3690PCB/ASSY (MA2M)M140841*11DBB IC2012114 5775IC/LINEAR (POWER AMP)TA8248K1BIA IC2022114 1421IC/PHOTO COUPLERPC900V1AKB Q201,Q2032250 1595TRANSISTOR2SB1240TV2R2ABB Q2052251 0672TRANSISTOR2SB1548-P.CS1ADB Q202, Q204, Q206-Q210 2250 1592TRANSISTOR2SC1740STPR7AAB D20

37、1, D2022390 3021DIODESRT142AFB D203, D205, D207-D210 2390 1344DIODE1SS133T-77-T6AAC D2062360 2044DIODE/ZENERMTZJ6.2A-T77-T1AAC D2042360 1939DIODE/ZENERMTZJ5.1C-T77-T1AAA J2013501 7049JACK (POWER)HEC2305-01-3301ACA J2023612 0665JACK (PHONE)YKB21-50061AGB J2033612 0789JACKYKB21-50101ACB J2043501 4816J

38、ACK/DINYKF51-50511AHB Console PCBs N36928 2130PCB/ASSY (CN1M)M241172*11BPC LED3012370 1414LEDMPR3338S-B1491AAB Keyboard PCBs N46928 4500PCB/ASSY (KY1M)M140687*51BGB D501 - D5642301 0101DIODE1S2473T-77-T64AAB N56928 4510PCB/ASSY (KY2M)M140688*51BEB D565 - D6222301 0101DIODE1S2473T-77-T58AAB Keyboard

39、unit 66922 2720KEY SET/LT WHITEM312118*14APA 76922 2730KEY SET/LT WHITEM312118*21ARA 86906 8481KEY SET/LT BLACK 10PM140369A-32ALA 96906 8591KEY SET/LT BLACK 5PM140369A-41ATA N105860 0679SCREW3X819AAC 111909 2637SCREW3X1821AAC 126922 2762RUBBER/CONTACTM211704B-14AFA 136922 2772RUBBER/CONTACTM211705B-

40、11AFA - 21 - NItemCode No.Part NameSpecificationQPRICE CODER Panel unit 143831 1096SPEAKERS12J89A2BHB 151908 6418SCREW4X813AAC 163335 6804LCDLD-B10427E1BOB 176927 3890RUBBER/INTERCONNECTORM440759-12AVB 186927 3920REFLECTORM240922-11AMC 193122 3698CFLHMBV4BG2W106NLUAZG1AXC 206927 3420HOLDER/CFLM44075

41、8-12AAC N216927 3900PACKINGM440760-12ACC 226921 5031KNOBM311859A-11AAB 236927 0510SWITCH/SLIDE KNOBCSB-08D1ADB 246927 3820RUBBER/BUTTONM140821-11AIB 256927 3830RUBBER/BUTTONM240928-11ADB 266927 3840RUBBER/BUTTONM240929-11ADB 276927 3850RUBBER/BUTTONM140824-11AGB 286927 3860RUBBER/BUTTONM240931-11ACB

42、 296927 3870RUBBER/BUTTONM240932-11AKB 306903 2150RUBBER/BUTTONM341091-11AAB 316903 2150SPRING/BATTERY(+)M41330-11AAB 326902 6141SPRING/BATTERY(-)M41226A-11ABB N336928 4910PLATE/DISPLAYM241161-11AWC 345111 5163SCREW4X1040AAC N355860 0679SCREW3X818AAC N365150 1640SCREW3X1010AAC N375161 3171SCREW4X128AAC 386906 9218COVER/BATTERYM311164H*171AWB Accessory 6906 9043STAND/NOTEM340701*21BKB Notes: Q : Quantity R : Rank - 22 - CASIO TECHNO CO.,LTD. Overseas Service Division Nishi-Shinjuku Kimuraya Bldg. 1F 5-25, Nishi-Shinjuku 7-Chome Shinjuku-ku, Tokyo 160-0023, Japan