Casio CTK-750 Service Manual Download | Manualshive

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MAJOR WAVEFORMS

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Summary of Contents for CTK-750

Page 1: ...with price CTK 750 ELECTRONIC KEYBOARD R CTK 750...

Page 2: ...acing the DSP HG51A115A01FD 2 Block Diagram 3 Circuit Description 4 Wiring Diagram 13 Major Waveforms 14 PCB View and Major Check Points 16 Schematic Diagrams 17 Exploded View 20 IC and Transistor Lea...

Page 3: ...l time recording Memory Capacity Approx 5 800 notes Registration Memories 10 Registration Items Tone Number Rhythm Number Tempo Accompaniment Mode Accompaniment Volume Effects Layer On Off Split On Of...

Page 4: ...rating Voltage 5 5 V REPLACING THE DSP HG51A115A01FD Note To increase productivity the DSP HG51A115A01FD is sticked on the main PCB with a double side adhesive tape then its leads are soldered Remove...

Page 5: ...I7 VDD Power Switch MIDI IN OUT EA0 EA14 ED0 ED7 DSP HG51A115A01FD RA0 RA19 RD0 RD15 Sound Source ROM 16M bit TC5316200CP C081 WCK1 SLOP BCK D A Converter UPD6376CX Filter Filter Main Volume Power Amp...

Page 6: ...2 C 3 2 D3 2 D 3 2 FI2 E3 1 F3 1 F 3 1 G3 1 G 3 1 A3 1 A 3 1 B3 1 SI2 E3 2 F3 2 F 3 2 G3 2 G 3 2 A3 2 A 3 2 B3 2 FI3 C4 1 C 4 1 D4 1 D 4 1 E4 1 F4 1 F 4 1 G4 1 SI3 C4 2 C 4 2 D4 2 D 4 2 E4 2 F4 2 F 4...

Page 7: ...ne Play Style KO2 Track 4 Chord 1 Track 5 Chord 2 Track 6 Chord 3 Track 2 Rhythm Track 3 Bass KO3 3 6 9 Demo Touch Responce Digital Effect Resistration KO4 2 5 8 Track 1 1 4 7 KO5 Accomp Volume Song M...

Page 8: ...ume 23 29 P71 P77 In Button input signal input 30 AVCC In 5V source for internal DAC 31 38 P60 P67 Out LED segment signal output 39 VCC In 5V source 40 56 P27 P10 Out Address bus 48 VSS In Ground 0V s...

Page 9: ...controlled by APO Write enable signal controlled by APO 10MHz clock for the key touchLSI Controlled by APO Button scan LED drive signal Pin No Terminal In Out Function 1 RESET In Reset signal input 2...

Page 10: ...ource 17 GND1 In Ground 0V source 18 19 XT0 XT1 In Out 16 384MHz clock input output Connected to a crystal oscillator 20 SGL In System control terminal Single chip system Open 21 CCSB In Chip select s...

Page 11: ...AC circuit Pin No Terminal In Out Function 93 VCC5 In 5V source 94 95 97 105 107 109 110 112 EA0 EA14 Out Address bus for the effect RAM 96 EWEB Out Write enable signal output for the effect RAM 106 E...

Page 12: ...from the gate array Clock from the gate array Key touch LSI HG52E35P Keyboard FI SI KC Pin No Terminal In Out Function 1 SEL In Mode selection terminal Connected to ground 2 D GND In Ground 0V source...

Page 13: ...Out Not used 16 GND In Ground 0V source 17 XIN In Not used Connected to ground 18 XOUT Out Not used 19 TRES In Not used Connected to ground 20 23 25 28 CD0 CD7 In Out Data bus 24 GND In Ground 0V sour...

Page 14: ...drive Amp Power Amp 16 10 11 13 2 12 14 15 17 18 1 23 22 21 20 19 3 5 4 9 7 8 6 IN11 IN11 IN12 PriGND IN21 IN21 IN22 NC DC MUTE VCC2 ADJ Boot22 OUT22 PoGND2 OUT21 Boot21 VCC1 Boot21 OUT12 PoGND1 OUT11...

Page 15: ...SI0 FI0 FI2 FI1 CB8 CB7 CB6 CB5 CB4 CB3 CB2 CB1 KC7 KC6 KC5 KC4 KC3 KC2 KC1 KC0 CC8 CC7 CC6 CC5 CC4 CC3 CC2 CC1 SI4 FI4 KC5 KC4 KC3 KC2 KC1 KC0 CD8 CD7 CD6 CD5 CD4 CD3 CD2 CD1 FI7 FI6 FI5 SI7 SI6 SI5...

Page 16: ...14 MAJOR WAVEFORMS...

Page 17: ...15...

Page 18: ...16 1 21 9 10 11 27 26 29 14 15 16 17 13 12 2 6 3 5 4 7 8 28 24 25 19 22 23 20 18 PCB VIEW and MAJOR CHECK POINTS...

Page 19: ...0 0 0 0 0 0 7 5 3 5 3 2 6 2 6 2 6 2 6 2 6 2 6 2 6 2 6 5 9 11 6 11 8 5 1 5 8 5 2 5 3 0 7 0 0 5 2 5 2 3 2 3 2 3 4 11 0 1 2 3 4 5 6 12 13 18 25 26 27 28 29 24 22 23 19 7 8 9 10 11 14 15 16 17 21 20 SCHE...

Page 20: ...18 Console PCB M5712 CN1M...

Page 21: ...19 Keyboard PCBs M615T KY1M KY2M...

Page 22: ...20 EXPLODED VIEW...

Page 23: ...RCK LRSEL RSI SI LSI CLK 4 8 fs SEL D GND N C D VDD A GND A VDD R OUT R REF L REF L OUT 11 10 9 6 8 7 12 5 4 3 13 14 15 16 1 2 3 2 1 OUT VDD VSS 1 2 3 4 5 6 VCC GND NC 1 2 3 4 5 6 7 8 VCC GND 1A 1 1Y...

Page 24: ...22 B C E B C E E C B E C B Q2 2SD1762E F Q4 2SB1274 Q3 Q5 Q7 Q11 12 2SC1740SQ Q13 2SA933SQ Q14 21 DTA114TS Q1 6 2SB1240Q R...

Page 25: ...d 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 separately 3 The numbers in item column corre...

Page 26: ...64 B B 2606 1141 Carbon film resistor R 20 1K J T23 T 16 20 2 C A 2606 1148 Carbon film resistor R 20 220 J T23 T 4 20 2 C A 2606 1155 Carbon film resistor R 20 330 J T23 T 1 20 2 C A 2606 1162 Carbo...

Page 27: ...C A 3025 0826 EMI filter EXC EMT222DT T 3 10 21 C A 3501 4816 DIN jack YKF51 5051 1 1 110 C A 3501 5012 DC jack HEC2305 01 920 1 10 25 A A 3501 7651 Connector S8B PH K E 1 10 25 C A 3501 7658 Connect...

Page 28: ...le M712D DF0H03390 35353535 1 10 29 C A 12 6909 2170 Bender knob M31488 2 1 10 47 C A 6911 5241 Bender chassis A M31487A 1 1 10 45 C A 6911 5250 Bender chassis B M41946 1 1 10 16 C A 6911 5260 Bender...

Page 29: ...44 C A N 28 6922 4290 Packing 845X22 M412281 2 2 5 65 C B N 29 6918 1634 Battery cover sub ass y M311164D 1 1 1 200 B C Screws 30 0009 2680 Screw 4 x 8 10 50 2 C A 31 0009 2682 Screw 2 6 x 8 20 50 2...

Page 30: ...MA0300941A...

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