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ELECTRONIC KEYBOARD

CTK-541

JULY.1999

CTK-541

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Summary of Contents for CTK-541

Page 1: ...ELECTRONIC KEYBOARD CTK 541 JULY 1999 CTK 541 E E E...

Page 2: ...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...

Page 3: ...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 Varia...

Page 4: ...elocity MAX Phone output level Vrms with 8 load each channel L 240mV 240 mV 20 with key C3 pressed in Synth Lead 1 R 250mV 250 mV 20 Speaker output level Vrms with 4 load each channel with key G1 pres...

Page 5: ...cillator X1 Q1 Power Supply Circuit Q201 Q203 Q207 Q208 D205 Power Amp TA8248K IC201 Filter L Q206 Filter R Q205 Phone Output VC VCC DVDD AVDD APO DC 9V IN DB4 DB7 MIDI IN MIDI OUT COM1 COM16 SEG1 SEG...

Page 6: ...5 A 5 F 6 KO7 G2 D 3 B3 G4 D 5 B5 G6 KO8 0 KO9 3 2 1 KO10 6 5 4 Rhythm Tone KO11 9 8 7 Fingered Normal Off KO12 FF Right Stop Left REW Tempo Down Tempo Up Start Stop Synchro Fill In Chord Book Accomp...

Page 7: ...V source AC adaptor detection terminal 8 AN0 In 5 V when the keyboard is powered by batteries and becomes 0 V to cancel the APO function when AC adaptor is connected 9 AN1 In Input from pitch bender...

Page 8: ...y The following table shows the pin functions of KS0066U 10B Pin No Terminal In Out Function 1 22 63 80 23 VSS GND 0 V source Terminals for the built in clock pulse generator The external resistor con...

Page 9: ...n 1 NC Not used 2 B S 2 Terminal for a bootstrap capacitor 3 OUT2 Out Channel 2 output 4 VCC In 9 V source 5 OUT1 Out Channel 1 output 6 B S 1 Terminal for a bootstrap capacitor 7 Power GND In Ground...

Page 10: ...8 ADJUSTMENT MAIN PCB 1 Items to be adjusted 2 Adjustment and Test Point Locations Item Measuring Instrument Vop voltage setting Voltmeter VR1 BOTTOM VIEW Test point TOP VIEW...

Page 11: ...Adjust Output Connection Output Point Adjust for VR1 Voltmeter CP3 CP4 Adjust for 3 90 4 00V read ing on voltmeter under the temparature 20 25 C Makefineadjustment accord ing to the following instruc...

Page 12: ...APO signal JD connector pin 12 2 3 4 Sound waveform R ch Tone Whistle 59 JD connector pin 6 Key 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...

Page 13: ...11 PRINTED CIRCUIT BOARDS Main PCB JCM456 MA1M Main PCB JCM456 MA1M Top View Bottom View 1 7 8 6 6 5 2 4 3...

Page 14: ...12 Sub PCB JCM453 MA2M Top View Bottom View Sub PCB JCM453 MA2M...

Page 15: ...13 Console PCB JCM453 CN1 Top View Bottom View Console PCB JCM453 CN1...

Page 16: ...14 Keyboard PCB JCM618T KY1M Keyboard PCB JCM618T KY2M Bottom View Top View Top View Bottom View Keyboard PCB JCM618T KY2M Keyboard PCB JCM618T KY1M...

Page 17: ...15 SCHEMATIC DIAGRAMS Main PCB JCM456 MA1M 1 6 7 2 3 4 5 9 8...

Page 18: ...16 Sub PCB KDM453 MA2M...

Page 19: ...17 Console PCBs JCM453 CN1...

Page 20: ...18 Keyboard PCBs JCM618T KY1M KY2M...

Page 21: ...19 EXPLODED 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 21 18 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...

Page 22: ...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 fo...

Page 23: ...Q202 Q204 Q206 Q210 2250 1592 TRANSISTOR 2SC1740STPR 7 AA B D201 D202 2390 3021 DIODE SRT14 2 AF B D203 D205 D207 D210 2390 1344 DIODE 1SS133T 77 T 6 AA C D206 2360 2044 DIODE ZENER MTZJ6 2A T77 T 1...

Page 24: ...BBER BUTTON M140821 1 1 AI B 25 6927 3830 RUBBER BUTTON M240928 1 1 AD B 26 6927 3840 RUBBER BUTTON M240929 1 1 AD B 27 6927 3850 RUBBER BUTTON M140824 1 1 AG B 28 6927 3860 RUBBER BUTTON M240931 1 1...

Page 25: ...CASIO TECHNO CO LTD Overseas Service Division Nishi Shinjuku Kimuraya Bldg 1F 5 25 Nishi Shinjuku 7 Chome Shinjuku ku Tokyo 160 0023 Japan...

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