Casio_CTK-220L_Service_Manual电路图.pdf

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1、ELECTRONIC KEYBOARD CTK-220L CTK-220L 25 RHYTHMS POWER/MODE FINGERED CASIO CHORD NORMAL VOLUME SYNCHRO/? FILL-IN START/? STOP TEMPO TONE SONG? BANK STEP 1STEP 2 STEP 3 MULTI FUNCTION DISPLAY DEMO RHYTHMTONESONG BANK PART? SELECT RHYTHM 0 5 1 6 2 7 3 8 4 9 TRANSPOSE/TUNE ? ? ? ? ON OFF ? ? 20 SONG BA

2、NK KEYBOARD 100 TONES20 SONG BANK RadioFans.CN 收音机爱 好者资料库 CONTENTS Page Specifications . 1 Block Diagram . 2 Circuit Description . 3 Major Waveforms . 6 Printed Circuit Boards . 7 Schematic Diagrams . 8 Exploded View. 14 Parts List . 15 RadioFans.CN 收音机爱 好者资料库 1 SPECIFICATIONS GENERAL Number of keys

3、:49 Polyphonic:12-note Preset tones:100 Transpose:F# C F: half-note Auto-rhythms:25, Tempo: Adjustable, 216 steps (40 255), initial value: 120 Accompaniment:CASIO Chord, Fingered, Fill-in pattern, Synchro start Song bank:20-tune Digital volume control:10 steps (0 9), initial value: 7 Tuning control:

4、440 Hz 50 cents Built-in speakers:10 cm dia. 1 (Output: 2 W) Terminals:Headphone Jack, Stereo mini Jack Output impedance: 70 q, Output voltage: 3.6 V (rms) MAX Auto power off:Approximately 6 minutes after the last operation Power source:2-way AC or DC source AC: Required optional AD-5 AC adaptor DC:

5、 6 AA size batteries Power consumption:7.7 W Dimensions (HWD):85 771 324 mm (3-3/8 30-3/8 12-3/4 inches) Weight:3.4 kg (7.5 lbs) excluding batteries ELECTRICAL Current drain with 9 V DC: No sound output160 mA 20 % Maximum volume840 mA 20 % with white keys C1 to G2 pressed in Synth-Lead 1 Volume: Max

6、imum Phone output level (Vrms with 8 ohm load): with key C2 pressed in Synth-Lead 198 mV 20 % Speaker output level (Vrms with 4 ohm load): with key F4 pressed in Synth-Lead 12000 mV 20 % Minimum operating voltage:6.3 V RadioFans.CN 收音机爱 好者资料库 2 BLOCK DIAGRAM Buttons Illuminant? Keyboard 7 seg. LED L

7、ED LatchIC2, IC3 Q5 Q8 Q1 Q4 PG? X1, Q11 Reset IC? IC1 Power Supply Circuit? Q301 Q304? D334, D336 Amp.? IC301? LA4598Filter? Q305 Phone/Output DC+9 V IN APO MD0 MD7 KO8 KO11 LY1 ? LY7 KO0 KO7 LX0 ? LX7 KI0 KI7 CPU? LSI1? MSM 6755B-13 LED Driver LED Driver 3 LX0LX1LX2LX3LX4LX5LX6LX7 LY1D4D3C3C2G#2F#

8、2D#2C#2 LY2C4E3B2D2A#2C#3D#3F#3 LY3B3F3A2E2D#4C#4A#3G#3 LY4A3G3G2F2C#5A#4G#4F#4 LY5E4C5D5B5D#5F#5G#5A#5 LY6F4B4E5A5C6 LY7G4A4F5G5 CIRCUIT DESCRIPTION KEY MATRIX LED MATRIX KI0KI1KI2KI3KI4KI5KI6KI7 KO0C2G#2E3C4G#4E5C6 KO1C#2A2F3C#4A4F5 KO2D2A#2F#3D4A#4F#5 KO3D#2B2G3D#4B4G5 KO4E2C3G#3E4C5G#5 KO5F2C#3A

9、3F4C#5A5 KO6F#2D3A#3F#4D5A#5 KO7G2D#3B3G4D#5B5 KO801234 Start/ Stop Up Volume Down KO956789Down Volume Down Synchro/ Fill-In K10ToneRhythm Song Bank Part Select One KeyOne KeyDemo K11Step-1Step-2Step-3Fingered Casio Chord NormalOff NOMENCLATURE OF KEYS C2 C#2D#2F#2 G#2A#2C#3D#3F#3 G#3A#3C#4D#4F#4 G#

10、4A#4C#5D#5F#5 G#5A#5 D2E2F2G2A2B2C3D3E3F3G3A3B3C4D4E4F4G4A4B4C5D5E5F5G5A5B5C6 4 Pin No.TerminalIn/OutFunction 1MA14Not used. 2MWEBOutClock for LED latches 3 5Not used. 6MA0Out7-seg. LED drive signal 7 19MA1 MA11Not used. 20 27MD0 MD7Out7-seg. LED drive signal 28, 29NC1, NC2Not used. 30DGNDInGround (

11、0 V) source 31DVCCIn+5 V source 32, 33XTLO, XTLIIn/Out20 MHz clock input/output 34NC3Not used. 35RSTBInReset signal input 36P24/RXDNot used. Connected to +5 V. 37P25/TXDNot used. 38NMIInPower ON signal input. Connected to +5 V. 39APOOutAPO (Auto Power Off) signal output 40NC4Not used. 41REFHOutTermi

12、nal for the internal DAC 42, 43NC5, NC6Not used. 44DAOROutRight channel sound waveform output 45NC7Not used. 46AVdacIn+5 V source for the internal DAC and ADC 47DAOLOutLeft channel sound waveform output 48REFLOutTerminal for the internal DAC and ADC 49AGdacInGround source for the internal DAC 50AGad

13、cInGround source for the internal ADC 51ANINot used. Connected to ground. 52AVadcIn+5 V source for the internal ADC 53NC8Not used. 54MOD0InMode selection terminal. Connected to +5 V. 55, 56MOD1, MOD2InMode selection terminal. Connected to ground. 57P40InAPO cancellation signal 58 65KI0/P30 KI7/P37In

14、Terminals for key/button input signal 66 73KO0/P50 KO7/P57OutTerminals for key scan signal 74 77KO8/P20 KO11/P23OutTerminals for button input signal 78NC9Not used. 79LVCCIn+5 V source 80 95LX0 LX7, LY0 LY7OutLED drive signal 96LGNDInGround source 97 100MA18 MA15Not used. CPU (LSI1: MSM6755B-13) The

15、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 CPU also controls key input, button input and LED driving. The following table shows the pin functions of LSI1. 5 LG LVDD CPU? ? LSI1?

16、 ? MSM6755B-13 LX0 LX7 LY1 LY7 Q1 Q4 Q5 Q8 Q2 Q4 La Lg (Common) (Segment)MWEB LED? Latch? IC3 7-segment LEDKeyboard LEDs LED? Latch? IC2 MD0 MD3 MD4 MD7? MA0 Amp.? IC301 Filter Block? Q305 CPU? LSI1 FILTER BLOCK Since the sound signal from the CPU is a stepped waveform, the filter block is added to

17、smooth the waveform. POWER AMPLIFIER (IC301: LA4598) The power amplifier is a two-channel amplifier with standby switch. The following table shows the pin function of IC301. Pin No.TerminalIn/OutFunction 1Power GNDIn Ground (0V) source 2Ch1 B.S. Terminal for a bootstrap capacitor 3Ch1 OUTOut Channel

18、 1 output 4VCCIn +9V source 5Ch1 N.F.In Negative feedback input 6Ch1 INIn Channel 1 input 7D.C. Terminal for a decoupling capacitor 8Pre GNDIn Ground (0V) source 9Stand byIn Power control signal input. 0 V: Off, +9 V: On 10Ch2 INIn Channel 2 input 11Ch2 N.F.In Negative feedback input 12Ch2 OUTOut Ch

19、annel 2 output 13Ch2 B.S. Terminal for a bootstrap capacitor 14NC Not used LED DRIVING 6 1 2 4 3 5 6 1 APO signal? MSM6755B-13 pin 39 2 Reset signal? RH5VL40AA pin 1 4 Sound signal? JH connector pin 2 5 LED drive signal LX0? MSM6755B-13 pin 88 3 Clock? MSM6755B-13 pin 32 6 LED drive signal LY1? MSM6

20、755B-13 pin 81 Tone: Whistle (59)? Key : A4 Key: D4 MAJOR WAVEFORMS 7 241356 PRINTED CIRCUIT BOARDS Sub PCB KDM445-MA2M Top view Main PCB JCM446-MA1M Bottom viewTop view GR 0 R 5 5 E R309 R324 VC JA3 5 5 D329 R354 Q305 C363 R353 R352 R342 5 5 125 5 5 75 125 125 225 C348 C342 C374 R326R325 C341 C344

21、C350 IC301 C347 C345 C346 C349 R365 R339 C361 225 200 100 5 R310 R348 R343 C339 B 5 E 5 5 5 AVDD DVDD LVDD VCC R320 R318 R302 JA5? JA4 125 D331 J301 J302 C368 D333 5 GR PS D332 0 100? 100 75? 75? 75 D320? D319? D318? D317? D316? D315 D310? D308? D306? D307? D305? D309 D323? D322? D321 12JJ110JH1 D30

22、1? D330 D325 D326 D324 175 250 R373 R370R368 R369 C332 D302 C371 R338 C306 C307 R311 100 JA2 JA1 125 Q301 Q302 C336 Q303 D334 C330 R321 R323 R322 D336 D308 C334 C331 C335 R388 Q304 R317? R316 D304? R303? R301 C301 C328L301 L302 445B? UJW5 L305 R335 R333 R331 C352 L303 L304 LED301 D335? C333 R319 EB

23、150 150 75 B B E 100 5 5 5 5 5 BE 5 75 D328? D327 D314? D312? D311? D313 R327 C337 5 C373 Q310 C355 C372 BE R374 R371 R372 C359 R366 C356 R Q312 BE C364 8 Connected to KDM4910K-KY2M Connected to KDM445-LD2M Note: KI signals are renamed. (e.g. KI0 on the keyboard PCB KI1 on the main PCB) NO USE FOR C

24、TK-330 NO USE FOR CTK-330 NO USE FOR CTK-330 5 4 321 6 7 SCHEMATIC DIAGRAMS Main PCB JCM446-MA1M 9 Sub PCBs KDM445-MA2M/MA3M 10 Keyboard PCBs KDM4910K-KY1M/KY2M 11 LED PCB KDM446-LD1M 12 PCB NAME LED PCB KDM445-LD2M 13 PCB NAME PCB NAME LED PCB KDM446-LD3M LED PCB KDM445-LD4M 11 10 3 4 R-3 R-4 1 14

25、13 12 2 18 19 15 16 5 6 179 7 8 R-2 R-1 EXPLODED VIEW 14 Notes:This parts list does not include the cosmetic 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 chan

26、ge 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 to the same numbers in drawing. PARTS LIST CTK-220L ItemCode No.Parts NameSpecificationQR Main PCB 16925 6160Main PCB assy (M

27、A1M)M240438*31 B LSI12012 4690LSI, CPUMSM6755B-131 A IC12105 5922ICRH5VL40AA-T11 A IC22105 4452ICHD74HC174FPTR1 A IC32105 5796ICHD74HC4511FPTR1 A Q1 - Q42259 2555Transistor, Chip, DigitalUMW1NTL4 A Q5 - Q82259 2562Transistor, Chip, DigitalUMS1NTL4 A Q92259 2646Transistor, Chip, DigitalUMH3NTN1 A Q10

28、2259 2548Transistor, Chip, DigitalDTC143EUAT1061 A Q112252 1239Transistor, Chip2SC4081-T106Q1 A D12390 2576Diode, Chip, SchottkyRB501V-40TE-171 B D32390 1820Diode, Chip1SS355TE-171 B X12590 1526Oscillator, CeramicEFO-EN2005C41 B LED12370 1141LED, 7-seg.SL-9352-601 B Sub PCB assy 26925 6173Sub PCB as

29、sy M140476*21 B IC3012114 2891ICLA45981 A Q3012250 0742Transistor2SA1703S,T-AN-T1 A Q302, Q3052220 1409Transistor2SC1740SR-TP-T2 A Q3032253 0581Transistor2SD1858R,S-TV6-T1 A Q3042253 0455Transistor2SD1762E.F1 A 2390 1344Diode1SS133T-77-T31 B D3042360 1729Diode, ZenerMTZJ5.1A-T77-T1 B D3312390 0378Di

30、ode1SR139-100T-32-T1 B D3332390 1323DiodeRB100A-T32-T1 B D334, D3362360 2002Diode, ZenerMTZJ5.6B-T77-T2 B LED3012370 1106LEDMPR3338S-B991 B J3013501 7049Jack, PowerHEC2305-01-3301 B J3023501 4382Jack, PhoneHSJ2000-01-0101 B Keyboard PCBs 2301 0101Diode1S2473T-77-T49 B 36925 6180Keyboard PCB assyM140

31、449*21 B LED PCBs 2370 1323LED (for white key)KR3301X-J344K29 B 46925 6183LED PCB assy LD1,2MM140473*11 C 2370 1330LED (for black key)KR3302X-J345K20 B 56925 1340LED PCB assy LD3MM240428*11 C 66925 6184LED PCB assy LD4MM240500*11 C Mechanical Parts 76925 2160Battery coverM340490*11 B 86925 6261Slide

32、 knobM311859A-61 B 96925 5380Display plateM340534-21 C 106909 5890Slide contactCSB-12D1 B 113831 1072SpeakerS10JA49A1 B 126925 6370Rubber buttonM240374-31 B 136906 8371Rubber buttonM240414-21 B 146925 6300Rubber buttonM240413-21 B 156925 1700White key set, LSK-CBM340489*13 A 166925 1710White key set, LSK-CSM340489*21 A 176925 1720Black key set, LSK-10PM140369-12 A 186923 2390Key contact rubber, 18M240025-11 A 196922 4000Key contact rubber, 31M111765-11 A Other 6916 7880Music standM310827-11 C 15 MA1100761A Nov, 1996