Casio_CTK-50_Service_Manual电路图.pdf

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1、ELECTRIONIC KEYBOARD CTK-50 CTK-50 (without price) RadioFans.CN 收音机爱 好者资料库 INDEX 2 ELECTRICAL NominalLimit Current drain with 9V DC: No sound output50 mA50 mA 30% Maximum volume515 mA515 mA 30% with keys C1, D1, E1 and F1 pressed in Car-Horn tone, Volume; Maximum Sound Pressure Level at 10 cm away f

2、rom speaker: 108 dB108 10 dB with key C4 pressed in Car-Horn tone Volume; Maximum Minimum operating voltage: 5.8 V6.0 V GENERAL Number of keys:49 Polyphonic:8-note Preset tones:100 Auto-rhythms:100 Auto-accompaniment:CASIO Chord/Fingered Demonstration tune:Classical Medley Built-in speakers:10 cm di

3、a. 2.0W Input Rating: 1 pc. Terminal:AC Adapter Jack (DC 9 V) Power source:2-way AC or DC source AC: AC adapter DC: 6 AA size dry batteries Power consumption:6.0 W Dimensions:79 x 766 x 269 mm (HWD) (3-1/8 x 33 x 10-5/8 inches) (HWD) Weight:2.8 kg (6.2 lbs) excluding batteries SPECIFICATIONS CONTENT

4、S Specification. 2 Block Diagram. 3 Circuit Description . 4 Troubleshooting . 7 Major Waveforms . 8 Schematic Diagrams . 9 PCB View . 11 Exploded View . 12 Parts List . 13 RadioFans.CN 收音机爱 好者资料库 3 BLOCK DIAGRAM KO0KO9 KI0KI7 Keyboard Switches Oscillator Q301, X301 VDD +5 V Power supply circuit Q101

5、, Q102, D102 VC +9 V Amplifier A4598 IC101 Speaker Filter Q201 CPU MSM6387-13 LSI201 Main Volume AVDD +4.8 V RadioFans.CN 收音机爱 好者资料库 4 NOMENCLATURE OF KEYS CIRCUIT DESCRIPTION KEY AND SWITCH MATRIX F#3 G#3 A#3C#4 D#4F#4 G#4 A#4C#5 D#5F#5 G#5 A#5 F3G3A3B3C4D4E4F4G4A4B4C5D5E5F5G5A5B5C6 D#3C#3A#2G#2F#2

6、D#2C#2 C2D2E2F2G2A2B2C3D3E3 KI0KI1KI2KI3KI4KI5KI6KI7 KO0 01C2C#2D2D#2E2F2 (KC1) KO1 23F#2G2G#2A2A#2B2 (KC2) KO2 45C3C#3D3D#3E3F3 (KC3) KO3 67F#3G3G#3A3A#3B3 (KC4) KO4 89C4C#4D4D#4E4F4 (KC5) KO5 ToneRhythmF#4G4G#4A4A#4B4 (KC6) KO6TempoTempo C5C#5D5D#5E5F5 (KC7)UpDown KO7Start/ Fill-InF#5G5G#5A5A#5B5

7、(KC8)Stop KO8 DemoC6 (KC9) KO9NormalFingered CASIO Chord 5 Pin No.TerminalIn/ OutFunction 1, 2TEST1, TEST2Not used. Connected to ground. Power ON reset terminal. When the power switch is 3RESETInturned on, the terminal receives a low level signal and the internal circuits of the LSI are initialized.

8、 4AVDDIn+5 V sorce for the built-in DAC 5OUTOutSound waveform output 6AGNDInGround (0 V) source for the built-in DAC 7GNDInGround (0 V) source 8COSIIn21.725 MHz clock pulse input 9COSONot used. 10VDDIn+5 V source 11 18KI0 KI7InInput terminals from keys and switches 19, 20KO11, KO10Not used. 21 30KO9

9、 KO0OutKey and switch scan signal outputs CPU (LSI201: MSM6387-13) The CPU contains a sound data ROM and a DAC (Digital to Analog Convertor), and it provides a sound waveform in accordance with the pressed key and the selected tone. The following table shows the pin functions of LSI201. FILTER BLOCK

10、 Since the sound signal from the CPU is a stepped waveform, the filter block is added to smooth the waveform. AVDD C203 Q201 2SC1740SQ R202 C202 AGAG R204 R203 C201 To main volume From CPU 6 Pin No.TerminalIn/OutFunctiion 1Power GNDIn Ground (0 V) source 2Ch1 B.S.Out Terminal for a bootstrap capacit

11、or 3Ch1 OUTOut Channel1 output 4VCCIn +9 V source. Connected to the power source directly. 5Ch1 N.F.In Negative feedback input 6Ch1 INIn Channel1 input 7D.C.Out Terminal for a decoupling capacitor 8Pre GNDIn Ground (0 V) source 9StandbyIn Power control signal input. 0 V: OFF, +9 V: ON 10Ch2 INIn Cha

12、nnel2 input 11Ch2 N.F.In Negative feedback input 12Ch2 OUTOut Channel2 output 13Ch2 B.S.Out Terminal for a bootstrap capacitor 14NC Not used. POWER AMPLIFIER (IC101: LA4598) The following table shows the pin functions of IC101. 6 5 8 7 10 11 13 12 9 4 1 3 2 Input Amp. Pre-drive Amp. Power Amp. TSD p

13、rotector Stand by Bias circuit Input Amp. Pre-drive Amp. Power Amp. Ch1 IN Ch1 N.F. Pre GND D.C. Ch2 IN Ch2 N.F. Ch2 B.S. Ch1 OUT Power GND VCC Standby Ch2 OUT Ch2 B.S. Internal Block Diagram of IC101 7 Q101 2SD1858Q,R R116 D102 MTZ6.2A R101 D103 LED101 D101 ON Power Switch VDD (+5.5 V) VC (+9 V) DC

14、 +9 V Input DG AG DG DG AG C102 R115 R114 OFF Q102 2SC1740SQ D201 R208 AVDD (+4.8 V) POWER SUPPLY CIRCUIT The power supply circuit regulates two constant output voltages VDD (+5.0 V) for the CPU and the oscilla- tor, and AVDD (+4.8 V) for the analog circuit. TROUBLESHOOTING Nature of TroubleFaulty B

15、lockCause/Remedy No powerPower supply circuitFaulty Q101. Replace Q101. Faulty D102. Replace D102. Power switchPoor contact. Clean the contacts. Power jack (J101)Open J101 or poor soldering. Replace J101 or resolder. No sound at allPower Amp (IC101: LA4598)Open or shorted IC101. Replace IC101. CPU (

16、LSI201: MSM6387-13)Faulty LSI201. Replace LSI201. OscillatorFaulty Q301. Replace Q301. Open X301. Replace X301. Certain keys or switchesKey and switch matrixOpen circuit on KO or KI line. do not functionReplace keyboard PCB assembly. CPU (LSI201: MSM6387-13)Faulty LSI201. Replace LSI201. A certain k

17、ey or switchKey and switch matrixDust on the contact. does not function 8 MAJOR WAVEFORMS 1 Clock pulse COSI MSM6387-13 pin 8 2 3 Key scan signal KO0 MSM6387-13 pin 30 Key scan signal KO1 MSM6387-13 pin 29 4 5 6 7 Sound signal output MSM6387-13 pin 5 Filter output Emitter of Q201 Power amp input LA4

18、598 pin 6 Power amp output LA5498 pin 3 Tone : Flute (No.13) Key : A3 Volume : Maximum 1 2 3 4 5 6 7 50 ns CH1: 1V 2 ms CH1: 5 V CH2: 5 V 2 ms CH1: 50 mV CH2: 0.5 V CH1: 50 mV CH2: 50 mV 2 ms CH1 CH1 CH2 CH1 CH2 CH1 CH2 9 SCHEMATIC DIAGRAMS Keyboard PCB 10 Main PCBNotes: 1. All capacitance values ar

19、e indicated in F (p=10-6 F). 2. All resistance values are indicated in (k=103 , M=106). 1 2 3 4 5 6 7 8.9 5.9 5.0 5.3 0.3 0.9 2.2 2.4 4.7 1.8 11 PCB VIEW Main PCB R WPS BL BL JCM509-MA2M B 15JA1 JCM509-MA1M B R202 C106 R209 R210 R211 R212 R213 R214 R215 R216 200 200 175 C222 R W PS C218 C217 NO.1 75

20、 75 C101BL 100 100 125 125 100 100 LSI201 BL C214 D111 D106D107D109 C212 C213 C206 C209 5 C215 C216 D202 R226 R225 R224 R223 R222 R221 R220 R219 R218 R217 C223 MC201 JCM509-MA2M B No.2 D108 7575 5 75 R208 D201 150 C211 C219 C207 150 100 C202 R204 R203 Q201 C203 C201 D110 D112 D113 D105 B E D104 C111

21、 75 C112 R108 14 200 R105 C110 C109 C108 Q102 EB FB101 R116 J101 R103 5 B 5125 5 C107 1 IC101 R104 175 5 5 E Q101 R106 R102 75 D102 L101 D101 75 R101 5 R107 L102 C102 R113 R114 75 D103 LED101 R110 R109 R112 R111 NO JCM509-MA1M B No.2 D114 R115 R303 X301 No.2 R301 R302 C301 EB Q301 C302 JCM509 -MA3M

22、B 1324576 12 7 5 4 2 6 3 1 10 11 12 13 14 15 16 9 13-2 17-3 17-4 13-1 17-2 17-1 1-2 1-1 17-1 17-1 1-3 8 EXPLODED VIEW Notes: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 sepera

23、tely. 3.The numbers in item column correspond to the same numbers in drawing. PARTS LIST CTK-50 FOB Japan NItemCode No.Parts NameSpecificationQ N.R.YenR* Unit Price Electrical Parts N16923 2810PCB assy JCM509-MA123MM240016*1 1B W D1012390 1316DiodeSB10-04A3-BT-T 1BA D1022360 2044Zener diodeMTZJ6.2AT

24、-77-T 1BA ND1032360 2429Zener diodeMTZJ4.3B-T77-T 1AA D104D114,2390 1344Diode1SS133T-77-T 13CA D201,D202 FB1012845 3220Ferrite beadsEXC-ELDR35V-T 1CA IC1012114 2891ICLA4598 1AB J1013501 7049DC jackHEC2305-01-330 1AA NJA3665 0308TerminalIMSA-1068-03Z046PP1CA L101,L1023841 0959InductorELE-R100KR-T 2CA

25、 LED1012370 1106LEDMPR3338S-B99 1CA LSI2012011 2961LSIMSM6387-13 1AF MC2012845 0168Module capacitorCNB8X101K 1CB Q1012253 0448Transistor2SD1858Q,R-TV6-T 1AA Q102,Q201,2220 1387Transistor2SC1740SQ-TP-T 3BA Q301 X3012590 1897Ceramic oscillatorEFO-EN2175C4 1BB 1-16921 6210Battery spring (-)M412171-1 1B

26、A 1-26922 4940Battery spring (+)M412289-1 1BA N1-34317 5381Blank PCB JCM509-MA2M M140038A-21CA N1-44317 5451Blank PCB JCM509-MA3M M140038A-31CA N136923 2820PCB assy JCM498-KY12MM140023*1 1CK D1D492301 0101Diode1S2473-T-77-T 49CA N13-13719 4417Ribbon cable 15-pinDF5H15180-MM 1CB N13-23719 4424Ribbon

27、cable 9-pinDF5H09160-MM 1CA 4317 5390Blank PCB JCM498K-KY1MM340015-11CE N4317 5400Blank PCB JCM498K-KY2MM140023-11CB Mechanical Parts N26923 2870Rubber buttonM240014A-1 1BB 36909 5890Slide contactCSB-12D 2BA 46921 5030Slide knobM311859-1 2AA N56923 2860PanelM140014-1 1CI N63831 0756SpeakerS10JA12A 1

28、BD 76917 4474White key set CEGBM110589D-1 4AB 86917 4484White key set DFASM110590D-1 1AB 96917 4494White key set DFAM110591D-1 3AB 106917 4506Black key set 10PM110594F-1 2AB N116923 2890CaseM240067A*1 1CT 126922 4000Key contact rubber TAC31AM111765-1 1AC N146923 2850Bottom plateM240018-1 1CE N156906

29、 7511Battery coverM312197A*3 1BC N166923 2390Key contact rubber TAC18AM240025-11AC 17-11909 4589Screw2.6 x 89CA 17-21909 4588Screw2.6 x 1817CA 17-31909 2680Screw4 x 812CA 17-41908 6417Screw4 x 1016CA Accessory 6916 7880Music standM310827-1 1CB Notes: N New parts M Minimum order/supply quantity R Ran

30、k 13 14 Description of Capacitors A general description of capacitors is shown in the following table. The description consists of Type, Value, Rated Voltage and Tolerance. When you need a capacitor, please find a subsutitution in your country by yourselves referring to the description. Ref. No of C

31、apacitorDescription C101, C209, C211C215, C217C219, C222, C223, C301Ceramic, 1.01 F, 50 V, +/-20% C102Electrolytic, 10 F, 16 V, +/-20% C106, C112Mylar, 0.047 F, 50 V, +/-10% C107, C108, C110, C111Electrolytic, 47 F, 10 V, +/-20% C109Electrolytic, 220 F, 16 V, +/-20% C201Electrolytic, 2.2 F, 50 V, +/

32、-20% C202Semiconductive, 0.012 F, 16 V, +/-10% C203Semiconductive, 0.027 F, 16 V, +/-10% C206, C207Electrolytic, 330 F, 6.3 V, +/-20% C216Electrolytic, 1 F, 50 V, +/-20% C302Ceramic, 8.2 pF, 50 V, +/-10% C303Ceramic, 10 pF, 50 V, +/-5% Description of Resistors A general description of resistors is s

33、hown in the following table. The description consists of Type, Value, Rated Wattage and Tolerance. When you need a resistor, please find a subsutitution in your country by yourselves referring to the description. Note: All resistors are carbon film, 1/5 watt, +/-5% otherwise specified. Ref. No of ResistorDescription R101, R2021 K R102, R106, R3011.2 K R103, R1083.3 R104, R107390 R10518 K R109820 R110, R115560 R111330 R112220 R113, R208100 R114470 R11615 R203, R2043.9 K R209R2262.2 K R302100 K R303150 8-11-10, Nishi-Shinjuku Shinjuku-ku, Tokyo 160, Japan Telephone: 03-3347-4926 Apr, 1995