Casio_CTK-480_Service_Manual电路图.pdf

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1、ELECTRIONIC KEYBOARD CTK-480 CTK-480 0 5 1 6 2 7 3 8 4 9 MULTI FUNCTION DISPLAY POWER/MODE FINGERED CASIO CHORD NORMAL ON OFF VOLUME SYNCHRO/? FILL-IN START/? STOP TEMPO ? ? ? TRANSPOSE/TUNE ?s?A?m? 00?s?A?m 1 01?s?A?m 2 02?z?L?g?N? 03?X?W?I?s?A?m? 04?G?N?g?b?N?s?A?m 1 05?G?N?g?b?N?s?A?m 2 06?G?N?g?

2、b?N?s?A?m 3 07?G?N?g?b?N?s?A?m 4 08?n?v?V?R?h? 09?N?u?G?N?g? ?I?K? 10?G?N?g?b?N?I?K? 1 11?G?N?g?b?N?I?K? 2 12?G?N?g?b?N?I?K? 3 13?G?N?g?b?N?I?K? 4 14?I?K? 15?p?C?v?I?K? 16?h?I?K? 17?A?R?f?B?I? 18?o?h?l?I? 19?n?j?J? ?M?/?x?X? 20?K?b?g?M? 21?A?R?X?e?B?b?N?M? 22?W?Y?M? 23?G?N?g?b?N?M? 24?g?M? 25?f?B?X?

3、g?V?M? 26?E?b?h?x?X? 27?G?N?g?b?N?x?X? 28?X?b?v?x?X? 29?o?W? ?X?g?O?X/?A?T?u? 30?o?C?I? 31?F? 32?n?v? 33?X?g?O?X 1 34?X?g?O?X 2 35?X?g?O?X 3 36?V?Z?X?g?O?X 1 37?V?Z?X?g?O?X 2 38?N?C?A? 39?C?X? ?u?X? 40?g?y?b?g? 41?o? 42?u?X?Z?N?V? 43?t?z? 1 44?t?z? 2 45?u?X 1 46?u?X 2 47?V?Z?u?X 1 48?V?Z?u?X 2 49?V?

4、Z?u?X 3 ?h/?p?C?v? 50?v?m?T?b?N?X? 51?A?g?T?b?N?X? 52?e?i?T?b?N?X? 53?I?G? 54?N?l?b?g? 55?s?b?R? 56?t?g? 57?R?_? 58?t?g?A?T?u? 59?z?C?b?X? ?V?Z?T?E?h 1 60?V?Z?h 1 61?V?Z?h 2 62?V?Z?h 3 63?V?Z?J?I?y? 64?V?Z?p?b?h 1 65?V?Z?p?b?h 2 66?V?Z?p?b?h 3 67?O?X?n?j?J? 68?J?g?t? 69?V?Z?x?X? ?V?Z?T?E?h 2 70?p?h?

5、b?v? 71?R?Y?b?N?T?E?h? 72?T?E?h?g?b?N? 73?X?y?X?p?b?h? 74?V?ZSFX 75? 1 (?) 76? 2 (?d?b) 77? 3 (?F?) 78? 4 (?C?x?_?) 79? 5 (?t?j?) ?C? 80?X?g?O?X?s?A?m? 81?X?g?O?X?G?s? 82?N?C?A?G?s? 83?N?C?A?I?K? 84?X?g?O?X?M? 85?X?g?O?X?n?v? 86?u?X?X?g?O?X? 87?o?C?u?p?b?h? 8812?M? 89?N?C?A?X?g?O?X? ?X?v?b?g? 90?x?X

6、/?s?A?m? 91?x?X/?G?s? 92?x?X/?o?C?u? 93?x?X/?K?b?g?M? 94?x?X/?f?B?X?g?V?M? 95?X?g?O?X/?s?A?m? 96?X?g?O?X/?g?y?b?g? 97?r?u?t?H? 98?o? 99?p?J?b?V? 100 TONES ? TONE RHYTHMSONG TONE RHYTHM ?|?b?v?X? 00?|?b?v?t?W? 01?o?h? 02?|?b?v?o?h? 03?b?v?|?b?v? 04?E?o?h? 05?t?L?|?b?v? 0616?r?g? 078?r?g 1 088?r?g 2 0

7、9?|?b?v?X? ?b?N? 10?b?N?c? 11?X?b?N? 12?t?g?b?N 1 13?t?g?b?N 2 14?t?H?L?|?b?v? 1560s ?E? 16?b?N? 17?w?r? 1850s ?b?N? 19?V?J?S?u?X? ?W?Y/?_?X? 20?r?b?N?o?h? 21?X?X?C?O? 22?t?H?b?N?X?g?b?g? 23?W?Y?c? 24?A?V?b?h?W?Y? 25?e?t?W? 26?g?X? 27?f?B?X?R? 28?b?v? 29?t?N? ?s?A?/?e? 30?|?J? 31? 32?c?1 33?c?2 34?S

8、? 35?T?m?o? 36?T?o? 37? 38?o? 39? ? 40?Q? 41?Q?G? 42?X?J? 43?e?b?N?X?b?N?X? 44?t?H?N? 45?J?g? 46?S?X?y? 47?A?_?j? 48?o?b?N? 49? 01 ?fl ? 02?I?K?X? 03?A?C?W?O?E?O?C?X? 04? 05?h? 06?h?f? 07?O?X?u?X? 08? 00?A?C?l?E?N?C?l?E?i?n?g?E?W?N? 11 12 ? 13 ?A?v?X? 14 ?T?E?A? 15 ?s?i? 16?t?w?l?G?x? 17 10?W?O?x? ?

9、s?i?w?l?x? 20 SONG BANK50 RHYTHMS 09? 18 19 ?A?n?E?I?G? ?G?e?B?i? ?F? MELODY? ON/OFF RadioFans.CN 收音机爱 好者资料库 2 CONTENTS Specifications . 2 Block Diagram. 3 Circuit Description . 4 Troubleshooting . 7 Major Waveforms . 8 Schematic Diagrams .9 Printed Circuit Boards .11 Exploded View . 13 Parts List .

10、 15 SPECIFICATIONS GENERAL Number of keys:61 Polyphonic:12-note Preset tones:100 Auto-rhythms:50, Tempo control: 40 to 255 Accompaniment:CONCERT Chord, Fingered Song bank:20-tune Tuning control:440 Hz 50 cents Built-in speakers:4 inch dia. 1 W input rating: 2 pcs Terminals:Headphone Jack (Output imp

11、edance: 50 ohm, Output voltage: 4.6 V (rms) MAX Power source:2-way AC or DC source AC: AC adapter DC: 6D size dry batteries, Vehicle battery with DC adapter Power consumption:7.7 W Dimensions(HWD):90 910 322 mm (3-1/2 36-3/16 12-11/16 inches) Weight:3.9 kg (8 lbs) excluding batteries ELECTRICAL Curr

12、ent drain with 9 V DC: No sound output120 mA 30% Maximum volume650 mA 30% with white keys C1 to G2 pressed in Synth-Lead 1 Volume: 9 Phone output Level (Vrms with 8 ohm load each channel): with key E3 pressed in Synth-Lead 180 mV 30% Sound Pressure (at 10 cm away from speaker): with key E3 pressed i

13、n Synth-Lead 1100 dB 10 dB Minimum operating voltage:6.0 V RadioFans.CN 收音机爱 好者资料库 3 CPU MSM 6755B-06 LSI101 Keyboard ButtonsLED Reset IC IC102 Oscillator X101, Q111 Q105 Power Supply Circuit Q101 Q104, D108, D109 Power Amp. LA4598 IC101 Filter (L) Q109 Filter (R) Q110 Output DC+9V IN VCVCCAVDD DVDD

14、 LVDD APO CC1 CC3 La Lg, Lp KO8 KO11 KI0 KI7 KO0 KO7 BLOCK DIAGRAM RadioFans.CN 收音机爱 好者资料库 4 CIRCUIT DESCRIPTION KEY MATRIX KI0KI1KI2KI3KI4KI5KI6KI7 KO0C1G#1E2C3G#3E4C5G#5 KO1C#1A1F2C#3A3F4C#5A5 KO2D1A#1F#2D3A#3F#4D5A#5 KO3D#1B1G2D#3B3G4D#5B5 KO4E1C2G#2E3C4G#4E5C6 KO5F1C#2A2F3C#4A4F5 KO6F#1D2A#2F#3D

15、4A#4F#5 KO7G1D#2B2G3D#4B4G5 KO801234Start/Stop Tempo Up Volume Up KO956789 Tempo Down Volume Down Synchro/ Fill-In K10ToneRhythm Song Bank Melody On/Off K11Fingered CONCERT Chord NormalPower Off 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 F3G3A3B3C4D4E4F4G4A4B4C5D5E5F5G5A5B5

16、C6 D#3 C2D2E2F2G2A2B2C3D3E3B6A6G6F6E6D6C7 C#3A#2G#2F#2D#2C#2A#6G#6F#6D#6C#6 5 + + AVDD AG AGAGAGAG 16 V 10 ? 2SC1740SQ 10 K 10 10 K10 K C332(H) 33 K? C152 (H)? C221B (A)? 10 V 22 ? 2.2 K? To main volume From the CPU CPU (LSI101: MSM6755B-06) The CPU contains a sound data ROM and a DAC (Digital to An

17、alog Convertor), and it provides left and right channel sound waveforms in accordance with the pressed key and the selected tone. The following table shows the pin functions of LSI101. Pin No.TerminalIn/OutFunction 1 29MA14 NC2Not used. 30DGNDInGround (0V) source 31DVCCIn+5V source 32, 33XTLO, XTLII

18、n/Out20MHz clock input/output 34NC3Not used. Connected to ground. 35RSTBInReset signal input 36P24/RXDNot used. Connected to +5V. 37P25/TXDNot used. 38NMIInPower on signal input 39APOOutAPO (Auto Power Off) signal output 40NC4Not used. 41REFHOutTerminal for the internal DAC 42, 43NC5, NC6Not used. 4

19、4DAOROutRight channel sound waveform output 45NC7Not used. 46AVdacIn+5V source for the internal DAC and ADC 47DAOLOutLeft channel sound waveform output 48REFLOutTerminal for the internal DAC and ADC 49AGdacIn Ground source for the internal DAC 50AGadcInGround source for the internal ADC 51ANINot use

20、d. Connected to ground. 52AVadcIn+5V source for the internal ADC 53NC8Not used. Connected to +5V. 54MOD0InMode selection terminal 55, 56MOD1, MOD2InMode selection terminal 57KO9/P40InPower source detection signal input 58 65KI0/P30 KI7/P37InTerminals for key/button input signal 66 73KO1/P50 KO8/P57O

21、utTerminals for key scan signal 74 77P20 P23OutTerminals for button input signal 78NC9Not used. 79LVCCIn+5V source 80 82CC1 CC3OutLED common signal output 83 87Not used. 88 95La Lg, LpOutNot used. 96LGNDInGround (0V) source 97 100Not used. FILTER BLOCK Since the sound signal from the CPU is a steppe

22、d waveform, the filter block is added to smooth the waveform. 6 POWER AMPLIFIER (IC101: LA4598) The power amplifier is a two-channel amplifier with standby switch. The following table shows the pin function of IC101. Pin No.TerminalIn/OutFunction 1Power GNDIn Ground (0V) source 2Ch1 B.S. Terminal fo

23、r a bootstrap capacitor 3Ch1 OUTOut Channel 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

24、.In Negative feedback input 12Ch2 OUTOut Channel 2 output 13Ch2 B.S. Terminal for a bootstrap capacitor 14NC Not used LED DRIVING CPU? LSI01? MSM6755B LaLg, Lp CC1CC3 LVDD Q106Q108? LED Driver LG ? 7 INITIAL RESET CIRCUIT When batteries are set or an AC adapter is connected, the reset IC provides a

25、low pulse to the CPU. The CPU then initializes its internal circuit. CPU? MSM 6755B-06? LSI101 RESET Reset IC? RE5VA35A? IC102 VDD Battery Set TROUBLESHOOTING Nature of TroubleFaulty BlockCause/Remedy No powerPower supply circuitFaulty IC101. Replace IC101. Faulty D106 D109. Replace D106 D109. Fault

26、y Q101 Q104. Replace Q101 Q104. Power switchPoor contact. Clean the contacts. Power jack (J101)Open J101 or poor soldering. Replace J101 or resolder. No sound at allPower Amp (IC101: LA4596)Open or shorted IC101. Replace IC101. CPU (LSI101: MSM6755B-06)Faulty LSI101. Replace LSI101. OscillatorFaulty

27、 Q111. Replace Q111. Open X101. Replace X101. Certain keys or switches do not function Key and switch matrixOpen circuit on KO or KI line. Replace keyboard PCB assembly. CPU (LSI101: MSM6755B-06)Faulty LSI101. Replace LSI101. A certain key or switch does not function Key and switch matrixDust on the

28、 contact. 8 0.1 s CH1 CH15VBWL 20 s CH1 BWLCH11V 10 s CH1 CH2 CH2BWLCH15V5V 1ms CH2 CH1 BWLCH11V1VCH2 1ms CH1 CH2 BWLCH11VCH2 1V 1ms CH1 CH2 BWLCH11V1VCH2 1 RESET signal IC102 pin 1 2 Main clock pulse MSM6755B-06 pin 32 3 Key scan signal KO10 MSM6755B-06 pin 76 4 Key scan signal KO11 MSM6755B-06 pin

29、 77 5 Sound signal output (L-ch) MSM6755B-06 pin 47 6 Sound signal output (L-ch) Q109 2SC1740SQ Emitter 7 Sound signal output (R-ch) MSM6755B-06 pin 45 8 Sound signal output (R-ch) Q110 2SC1740SQ Emitter 9 Sound signal output (R-ch) LA4598 pin 3 0 Sound signal output (L-ch) LA4598 pin 12 Tone: Flute

30、 Ensemble (58) Key: A3 Volume: 7 12 5 6 9 0 3 4 7 8 MAJOR WAVEFORMS 9 SCHEMATIC DIAGRAMS Main PCB KDM440-MA1M 10 9 6 8 7 5 3 4 2 1 Notes: 1. All capacitance values are indicated in F (p=10-6 F) 2. All resistance values are indicated in (k=103 , M=106 ). 10 Keyboard PCBs KDM6111K-KY1M/KY2M Notes: 1.

31、All capacitance values are indicated in F (p=10-6 F) 2. All resistance values are indicated in (k=103 , M=106 ). 11 96571081234 PRINTED CIRCUIT BOARDS Main PCB KDM440-MA1M Top View Console PCB KDM6111K-KY1M Top View Console PCB KDM6111K-KY2M Top View 12 Main PCB KDM440-MA1M Bottom View Console PCB K

32、DM6111K-KY1M Bottom View Bottom View Console PCB KDM6111K-KY2M 8 9 10 11 4 2 1 7 6 4 16 15 16 13 15 12 14 5 3 ? R-1 R-2 R-3 R-4 R-5 EXPLODED VIEW 13 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 depar

33、tment 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 to the same numbers in drawing. P

34、ARTS LIST CTK-480 FOB Japan NItemCode No.Parts NameSpecificationQ N.R.YenR Unit Price MAIN PCB ASSEMBLY IC1012114 2891Monolithic ICLA45981A IC1022105 5922ICRE5VL40AA-TZ1A LSI1012012 3486LSI, CPUMSM6755B-061A Q1012251 0469Transistor2SB1237Q1B Q1022220 1387Transistor2SC1740Q1B Q103/1042253 0448Transis

35、tor2SD1858Q2B Q1052200 2449Transistor2SA933SQ1B Q106 - 1112220 1387Transistor2SC1740Q6B D1012360 1729Zener diodeMTZJ5.1A1B D1032390 2828DiodeRB441Q-40T1B D1052390 2828DiodeRB441Q-40T1B D1062390 2408Zener diode1FW143N1B D1072390 2828DiodeRB441Q-40T1B D1082360 2002Zener diodeMTZJ5.6BT1B D1092360 2002Z

36、ener diodeMTZJ5.6BT1B D110 - 1292390 2828DiodeRB441Q-40T20B D1302390 2828DiodeRB441Q-40T1B LED1012370 1106LEDMPR3338S-B991B LED1022370 1309LEDLB603VF11B X1012590 1526Ceramic oscillatorEFO-EN2005C41B J1013501 7046Power jackHEC2305-01-3301A J1023612 0665Phones jackYKB21-50061C CONSOLE PCB ASSEMBLY D70

37、1 - 7252301 0101Diode1SS247325B D731 - 7662301 0101Diode1SS247336B MECHANICAL PARTS 16909 5890Slide contactCSB-12D1B 26925 1560Key contact rubber, 6-contactM340418-11B 36925 1630Key contact rubber, 14-contactM340417-11B 43831 0770SpeakerS10JA13A2B 56925 1260PCB assy, MA1M 6925 1260M140403*11B 66925

38、1890Battery coverM340485*11B 76921 5030Slide knobM311859-11B 86922 2720White key set, 7-KeyM312118*14A 96922 2730White key set, 8-KeyM312118*21A 106922 2750Black key set, 5-KeyM111726-21A 116922 2740Black key set, 10-KeyM111726-12A 126922 4000Key contact rubber, 31-contactM111765-11B 136922 3990Key contact rubber, 30-contactM111764-11B 146925 1310PCB assy, KYM140402*11B 156925 1600Plastic footM440346-12B 166925 1620Rubber footM440366-12B 15 MA0600761A