Casio_CTK-450_Service_Manual电路图.pdf

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1、(with price) CTK-450 ELECTRONIC KEYBOARD R CTK-450 RadioFans.CN 收音机爱好者资料库 CONTENTS SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 DISASSEMBLE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 BLOCK DIAGRAM . . . . . .

2、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 CIRCUIT DESCRIPTION Key and Switch Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 CPU (MSM6567-15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Filter Bl

3、ock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Mute Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Power Amplifier (LA4598) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4、Power Supply Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 PCB VIEW AND MAJOR WAVEFORMS . . . . . . . . . . . . . . . . . . . . . . . . 10 EXPLODED VIEW . . . . . . . .

5、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 IC AND TRANSISTOR LEAD IDENTIFICATIONS . . . . . . . . . . . . . . . . 13 PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 RadioFans.CN 收音机爱好者资料库 1 General Number of Keys:

6、61 Polyphonic:16-note Preset Tones:64 Auto-Rhythms:64 Auto-Accompaniment:CASIO Chord/Fingered Auto-Play Tunes:Songs: 32 (Melody ON/OFF) Free Sessions: 32 Terminals:PHONE/OUTPUT Jack Output Impedance: 40 , Output Voltage: 3.5V(rms)MAX, AC Adaptor Jack (DC9V) Built-In Speakers:10 cm dia. 1.5W Input Ra

7、ting: 1 pec. Power Source:3-way AC or DC source AC: AC adaptor AD-5 DC: 6 D size dry batteries Battery life: Approx. 2 hours (SUM-3/R6P) Approx. 4 hpurs (AM-3/LR6) Car battery: Required optional car adaptor CA-5 Auto Power Off:Approx. 6 minutes after the last operation Power Consumption:7.0 W Diment

8、ions:86 x 920 x 291 mm (HWD) (3-3/8 x 36-1/4 x 11-7/16 inches) (HWD) Weight:3.5 kg (7.7 lbs) excluding batteries Standard Accessory:Music stand, Song book Electrical Current Drain with 9V DC: No Sound Output130 mA 20% Maximum Volume400 mA 20% with keys C3 to C4 pressed in Clarinet tone, Volume; Maxi

9、mum Line Output Level (Vrms with 47 K load each cannel):650 mV 20% with key C6 pressed in Clarinet tone Phone Output Level (Vrms with 8 load each channel):120 mV 20% with key C6 pressed in Clarinet tone Speaker Input Level:1400 mV 20% with key C6 pressed in Clarinet tone Minimum Operating Voltage:5.

10、7 V SPECIFICATIONS RadioFans.CN 收音机爱好者资料库 2 DISASSEMBLE INSTRUCTIONS Note: The keyboard PCBs are fixed to the case by springy clicks instead of by screws. To disassemble keyboard PCBs 1. Using gentle force, press a click to release the PCB from the click. A click can be caught in the slit behind of

11、 it, or can be deformed if too much force is used. When a click is caught in the slit, return it to original position with a tweezers. 2. Release the clicks one by one from an end to another along the PCBs. 3. Take off the PCBs. To reassemble the keyboard PCBs 1. Before assembling the PCBs, check th

12、at all clicks are free, and properly aligned. 2. Set the PCBs in the bumps opposite to the clicks. 3. Press down the PCBs until clicking. When clicks are deformed, screw the PCBs on the case. The screw is available from our spare parts center. Code No. 0009 2682 Screw 2.6 x 8 3 KO0KO14 KI0KI7 Keyboa

13、rd Switches Oscillator Power Supply Circuit AVDD +5VVCC +9V Speaker Output Jack Filter T4/T5 CPU MSM6567-15 T1/T2/T3 Amplifier LA4598 Main Volume Mute Circuit Reset IC VDD +5V M5218APR T6 S-8053ANO LEDX6 (APO) BLOCK DIAGRAM 4 0IK1IK2IK3IK4IK5IK6IK7IK 0OK rewoP FFO 2C2#C2D2#D2E2F 1OKy a l P2#F2G2#G2A

14、2#A2B 2OKdereg n i F3C3#C3D3#D3E3F 3OK OISAC drohC 3#F3G3#G3A3#A3B 4OKgnoS4C4#C4D4#D4E4F 5OK4#F4G4#G4A4#A4B 6OK5C5#C5D5#D5E5F 7OK5#F5G5#G5A5#A5B 8OK6C6#C6D6#D6E6F 9OK6#F6G6#G6A6#A6B 01OK7C43210 11OK opmeT nwoD .pmoccA 1emu l oV ) . n i M( 765 21OK opmeT pU .pmoccA 2emu l oV 31OK .pmoccA 3emu l oV en

15、oTmh t y hR ydo l eM FFO/NO / t ratS potS / c nyS n i - l l iF 41OK .pmoccA 4emu l oV )xaM( CIRCUIT DESCRIPTION Key and Switch Matrix Nomenclature of Keys 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

16、#6G#6F#6D#6C#6 5 Pin No.TerminalIn/OutFunction 1LEDY0Out Not used. 2LVDD1In +5V source 3LGND2In Ground (0V) source 4 9LEDX0 LEDX5Out Not used. 10LEDX6Out APO(Auto Power Off) signal output ON: H OFF: L 11LEDX7Out Not used. 12LVDD2In +5V source 13 27 Not used. 28GND2In Ground (0V) source 29COSIIn 43.4

17、5MHz clock pulse input 30COSOOut 43.45MHz clock pulse output 31VDDIn +5V source 32GND2In Ground (0V) source 33 35TEST1 TEST3 Not used. Connected to ground. 36MIIn Not used. Connected to +5V. 37-RESETIn Reset signal input 38AVDDIn Ground (0V) source for internal DAC 39OUTOut Sound waveform output 40A

18、GNDIn Ground (0V) source for internal DAC 41 48KI0 KI7In Input terminals for keys and switches 49 63KO0 KO14Out Key and switch scan signal output 64 72 Not used. 73LGND1In Ground (0V) source 74 80 Not used. CPU (MSM6567-15) Containing sound data ROM and DAC (Digital to Analog Convertor), the CPU pro

19、vides sound waveform in accordance with the pressed key and the selected tone. The following table shows pin function of the LSI. 6 Filter Block Since the sound signal from the CPU is a stepped waveform, the filter block is added to smooth the waveform. Mute Circuit The mute circuit removes noise fr

20、om the sound signal just before the signal fades away. The circuit detects amplitude of the decaying sound signal by amplifing it by 1000 times, and transistor T6 flows the signal into the ground when the amplitude decays almost zero. MSM6567-15 CPU To mute circuit To main volume Sound signal from f

21、ilter block +0.5V at the minimum amplitude (no sound) -2.7V at the maximum amplitude 7 Power Amplifier (LA4598) LA4598 is a 2-channel power amplifier with stand-by switch. The following table shows the pin functiion of the power amplifier. Pin No.TerminalIn/OutFunction 1Power GNDIn Ground (0V) sourc

22、e 2Ch1 B.S.Terminal for bootstrap capacitor 3Ch1 OUTOutChannel 1 output 4VCCIn+9V source 5Ch1 N.F.InNegative feedback input 6Ch1 INInChannel 1 input 7D.C.Terminal for decoupling capacitor 8Pre GNDInGround (0V) source 9Stand byInPower control signal input. 0V: OFF, +9V: ON 10Ch2 INInChannel 2 input 1

23、1Ch2 N.F.InNegative feedback input 12Ch2 OUTOuthannel 2 output 13Ch2 B.S.Terminal for bootstrap capacitor 14NCNot used. 6 5 8 7 10 11 13 12 9 4 1 3 2 Input Amp. Pre-drive Amp. Power Amp. TSD protector Stand by Bias circuit Input Amp. Pre-drive Amp. Power Amp. Ch1 IN Ch1 NF Pre GND D.C. Ch2 IN CH2 NF

24、 CH2 BS CH1 OUT POWER GND VCC STAND BY CH2 OUT CH2 BS Block Diagram 8 Power Supply Circuit The power supply circuit generates three voltages - VDD (+6.0V) for the CPU and the reset IC, AVDD (+6.0V) for the analog circuit, and VCC1 (+8.6V) for the pilot lamp and the power amplifier. When turning powe

25、r on, the 100 capacitor makes transistor T2 on first then the CPU provides transistor T2 High of APO signal to keep it being on. HOW TO GET POWER IN OPENING TOP PANEL 1. Remove the mode switch contact from the top panel. 2. Make short-circuit A and B with a wire as shown below. 3. Connect an AC adap

26、tor to the DC jack. 4. Place the contact on carbon paint of the mode switch. 5. Align the contact onto OFF position. 6. Slide the contact to PLAY position so that the pilot lamp lights up. 7. Take the contact off the carbon paint. The unit will operate until disconnecting the AC adaptor or automatic

27、 power off, and it sounds at full volume. AB 9 SCHEMATIC DIAGRAMS M6110K-KY1M, KY2M 10 PCB VIEW AND MAJOR WAVEFORMS 8 7 96 5 10 11 2 134 11 M5508-MA1M 2.9 5.2 2.3 2.2 5.2 1.5 5.2 5.7 3.2 3.2 3.2 3.2 3.2 3.2 0.0 +0.5 - 2.7 0.0 0.9 0.0 5.7 5.7 0.0 5.8 3.2 3.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.6 0.6 0.

28、6 0.6 0.6 0.6 0.65.4 5.4 0.6 0.6 0.6 0.6 0.5 0.5 0.5 0.5 0.0 5.9 0.0 0.0 7.7 4.5 8.7 1.2 0.0 8.6 0.0 8.6 0.0 1.2 4.4 7.7 6.0 6.6 8.6 8.6 7.0 0.0 0.7 0.0 8.7 10 11 5 6 9 7 8 12 4 3 12 EXPLODED VIEW 9 IC AND TRANSISTOR LEAD IDENTIFICATIONS LA4598 M5218APR S-8053ANO 2SA854SR 2SC1740SQ 2SD1468SR 2SC3112

29、B2SD2008Q,R ECB EBC Power GND ch1 B.S. ch1 OUT VCC ch1 N.F. ch1 IN D.C. Pre GND Standby ch2 IN ch2 N.F. ch2 OUT ch2 B.S. 1 2 3 4 5 6 7 8 9 10 11 12 13 ECB + - + - 1234 5678 VCC GND 13 PARTS LIST CTK-450 Notes:1.Prices and specifications are subject to change with- out prior notice. 2.As for spare pa

30、rts order and supply, refer to the GUIDEBOOK for Spare parts Supply, published separately. 3.The numbers in item column correspond to the same numbers in drawing. FOB Japan NItemCode No.Parts NameSpecificationQM N.R.YenR* Unit Price PCB Assy M5508-MA1M 2011 6979 LSI MSM6567-15GS-K-109111,060AL 2105

31、2219 IC S-8053ANO 1560AB 2114 1799 IC M5218APR 1538AA 2114 2891 IC LA4598 11140AB 2220 1387 Transistor2SC1740SQ-TP-T 2 1013AA 2250 0168 Transistor2SA854-SR-TP-T 1 1020AA 2252 0168 Transistor2SC3112B-TPE2-T 1 1015AA 2253 0357 Transistor2SD2008Q,R-T105-T 1 1030AA 2253 0420 Transistor2SD1468SR,S-TP-T 1

32、 1016AA 2310 7767 Zener diodeRD6.8ESB2-T1-T 1 1016BA N2360 1631 Zener diodeRD5.6ESB1-T1-T 1 108BA 2370 0343 LED LN28RPX-(TT) 1 1016CA 2390 1316 DiodeSB10-04A3-BT-T 1 1028CA 2390 1344 Diode1SS133T-77-T 27 203CA 2590 1176 Ceramic oscillatorEFO-GC4345C4 11110BB 2606 0560 Carbon film resistorR-20-1.5M-J

33、-T24-T 1 203CA 2606 1141 Carbon film resistorR-20-1K-J-T23-T 26 202CA 2606 1155 Carbon film resistorR-20-330-J-T23-T 3 202CA 2606 1169 Carbon film resistorR-20-100-J-T23-T 8 202CA 2606 1176 Carbon film resistorR-20-100K-J-T23-T 2 202CA 2606 1204 Carbon film resistorR-20-3.3-J-T23-T 2 202CA 2606 1253

34、 Carbon film resistorR-20-4.7K-J-T23-T 1 202CA 2606 1288 Carbon film resistorR-20-2.2K-J-T23-T 2 202CA 2606 1295 Carbon film resistorR-20-2.7K-J-T23-T 2 202CA 2606 1309 Carbon film resistorR-20-470-J-T23-T 1 202CA 2606 1316 Carbon film resistorR-20-47K-J-T23-T 4 202CA 2606 1365 Carbon film resistorR

35、-20-3.9K-J-T23-T 2 202CA 2606 1428 Carbon film resistorR-20-5.6K-J-T23-T 1 202CA 2606 1435 Carbon film resistorR-20-560-J-T23-T 2 202CA 2606 1442 Carbon film resistorR-20-18K-J-T23-T 2 202CA 2606 1456 Carbon film resistorR-20-390K-J-T23-T 1 202CA 2606 1470 Carbon film resistorR-20-7.5K-J-T23-T 1 202

36、CA 2606 1477 Carbon film resistorR-20-33-J-T23-T 2 202CA 2606 1484 Carbon film resistorR-20-820-J-T23-T 2 202CA 2606 1533 Carbon film resistorR-20-270K-J-T23-T 3 202CA 2606 1652 Carbon film resistorR-20-390-J-T23-T 2 202CA N2606 1757 Carbon film resistorR-20-6.8-J-T23-T 1 202CA 2801 7413 Electrolyti

37、c capacitor10RE2-330-T2-T 1 1026CA 2801 7910 Electrolytic capacitor16RE3-470-T2-T 1 1027CA 2802 9833 Electrolytic capacitor50RBP2-3R3-T2-T 2 1018CA 2802 9840 Electrolytic capacitor50RBP2-R47-T2-T 1 1018CA 2802 9938 Electrolytic capacitor50RBP2-1-T2-T 1 1018CA 2805 3142 Electrolytic capacitor16RE2-10

38、-T2-T 2 1014CA 2807 1023 Electrolytic capacitor50RE2-1-T2-T 1 1015CA 2807 1082 Electrolytic capacitor16RE2-100-T2-T 1 1027CA 2807 1121 Electrolytic capacitor10RE2-220-T2-T 3 1026CA 2807 1139 Electrolytic capacitor50RE2-R47-T2-T 2 1012CA 2807 1180 Electrolytic capacitor10RE2-47-T2-T 6 1016CA 2813 193

39、9 Semiconductive capacitorRT-B70TKYR473K-T 1 209CA 2813 2093 Semiconductive capacitorRT-B50TKYR103K-T 1 204CA 2813 2422 Semiconductive capacitorRT-B50TKYR183K-T 1 205CA 2813 3283 Ceramic capacitorUP050F104Z-A-B 16 208CA 2818 0365 Ceramic capacitorRT-HE50TKYB102K-T 12 203CA 2818 0446 Ceramic capacito

40、rRT-HE40TKYB101K-T 10 204CA Notes: N New parts M Minimum order/supply quantity R Rank 15 FOB Japan NItemCode No.Parts NameSpecificationQM N.R.YenR* Unit Price 2819 0395 Ceramic capacitorRT-HE40TKSL100F-T 2 206CA 2830 6436 Mylar capacitorAMZV-473K50-T 2 209CA 2845 3220 Ferrite beadsEXC-ELDR35V-T 1 10

41、12CA 3025 0658 EMI filter ELK-AH103EB 3 1026CA 3501 7049 DC jack HEC2305-01-330 1529AA 3612 0711 Miniature jackYKB21-5101 1190BB N3841 0959 InductorELE-R100KR-T 1 1025CA N4317 4280 Blank PCB M5508-MA1M M111780-1 11230CC 6921 6211 Battery spring 700B M412171A-1 1 2012CA N6922 4850 PCB assy M5508-MA1M

42、M111781*1 113,300BV N6922 4940 Battery spring 508 M412289-1 1 2018CA N6922 5360 Felt 22x280 M412314-1 1 2025CA PCB Assy KEY 2301 0101 Diode1S2473-T-77-T 61 208CA JX3719 4256 Ribbon cable MASKL61 DF5H11180-MM 1 1041CA NJA3719 4263 Ribbon cable M508A DF5H17180-MM 1560CB N4317 4290 Blank PCB M6110K-KY1

43、M M211755-1 1588CB N4317 4301 Blank PCB M6110K-KY2M M111784A-1 1580CB N6922 4860 PCB assy KEY M111785*1 111,300CN Mechanical Parts N16922 4990 Panel 508 M111754-1 111,060CL 26921 5031 Slide knob 601 M311859A-1 3 1013BA 36909 5890 SL contact 12D CSB-12D 3 1035BA N46922 4500 Rubber button 508 M211736-

44、1 15140BB 53831 0637 Speaker10G28BFA 11190BC 6910 1130 Sponge A M4630-1 1 1014CA 66917 4474 White key CEGB M110589D-1 51120AB 76917 4484 White key DFAS M110590D-1 11110AB 86917 4494 White key DFA M110591D-1 41170AB 96917 4506 Black key 10P M110594F-1 21130AB 106918 5996 Black key 5P M110594F-3 1581A

45、B 116922 4980 Upper case sub assyM111755-1 111,400CO N11-16922 4960 Upper key stopper 61 M412310-1 1588CB N11-36922 4971 Lower key stopper 61 M412311A-1 1577CB N11-26922 5740 Key damper 61M412332-11535CA N126922 3990 Key contact rubber PET-TAC30A M111764-1 11190BC N136922 4000 Key contact rubber PET

46、-TAC31A M111765-1 11190BC N146906 7093 Battery cover sub assyM311200C*12 1138BA N156922 4951 Bottom plate 508M211737A-1 11340CD N6908 6160 Felt 156G M43073-1 4 207CA Screws 160009 4588 Screw2.6 x 1821 502CA 170009 4589 Screw2.6 x 84 502CA 180009 2682 Screw2.6 x 83 502CA 190008 6417 Screw4 x 1020 502CA 200009 2680 Screw4 x 88 502CA Accessory 6916 7880 Music stand U M310827-1 11120CB Notes: N New parts M Minimum order/supply quantity R Rank 16 MA0200941A