Casio CTK-750- Manuals

— 3 — BLOCK DIAGRAM KC0 ~ KC7 SI0 ~ SI7 FI0 ~ FI7 Key Touch LSI HG52E35P Working StrageRAM (256K-bit) HM62256ALP-10 Working StrageRAM (256K-bit) HM62256ALP-10 7-Segment LED LO0 ~ LO4 LED driver BA612 LD0 ~ LD7 KO0 ~ KO7 Buttons KI1 ~ KI7 VDD Power Switch MIDI IN OUT EA0 ~ EA14 ED0 ~ ED7 DSP HG51A115...

— 4 — CIRCUIT DESCRIPTION Key Matrix Key Second contact 2 First contact 1 FI KC SI Note: Each key has two contacts, the first conatct 1 and second contact 2 . KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7 FI0 C2 1 C#2 1 D2 1 D#2 1 E2 1 F2 1 F#2 1 G2 1 SI0 C2 2 C#2 2 D2 2 D#2 2 E2 2 F2 2 F#2 2 G2 2 FI1 G#2 1 A2 1 ...

— 9 — DSP HG51A115A01FD Effect RAM (256K-bit) HM65256BLP Sound Source ROM TC5316200CP-C081 CE A0 ~ A19 D0 ~ D15 RA0 ~RA19 RD0 ~RD15 RA22 D0 ~ D7 A0 ~ A3 LSIS RDAPO WRAPORESET SOLP BOK WOK1 EA0 ~EA14 ED0 ~ED15 CS WE OE D0 ~ D15 A0 ~ A14 ECEB EOEB EWEB PG 16.384MHz DAC UPD6376CX LOUT ROUT SOLP: Sound ...

— 11 — The following table shows the pin functions of the key touch LSI. Pin No. Terminal In/Out Function 1 REQB Out Interrupt request. Not used. 2, 3 FI10, SI10 In Key input signal 4 VCC In +5V source 5 CRDB In Read enable signal 6 CWRB In Write enable signal 7 CCBB In Chip select signal 8, 9 T, ST...

— 12 — Power Amplifier (LA4620) The power amplifier is a two-channel balanced amplifier with standby switch. The following figure showsthe internal diagram of the amplifier. Internal Diagram of LA4620 InputAmp. Pre-driveAmp. PowerAmp. RL ShortProtector InputAmp. Pre-driveAmp. PowerAmp. TerminalProte...

— 13 — WIRING DIAGRAM FI1FI2FI0SI0SI1SI2SI3FI3 KC0KC1KC2KC3KC4KC5KC6KC7 KC0KC1KC2KC3KC4KC5FI4SI4 KC6KC7SI5SI6SI7FI5FI6FI7 LG PWLD KO7 KO6 KO5 KO4 KO3 KO2 KO1 KO0 POWER KI1 KI2 KI3 KI4 KI5 KI6 KI7 La Lb Lc Ld Le Lf Lg Lp M615T-KY2M M615T-KY1M CD1CD2CD3CD4CD5CD6CD7CD8 CC1CC2CC3CC4CC5CC6CC7CC8 CB1CB2CB...

— 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

— 17 — 11.6 11.6 11.4 10.9 10.9 5.2 0.0 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 SCHEMATIC DIAGRAMS Main PCB M5712-MA1M

— 21 — IC LEAD IDENTIFICATION AND INTERNAL DIAGRAM TIMING GENERATOR SHIFT REGISTER LATCH MAIN DAC SUB DAC SUB DAC MAIN DAC LRCK 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 + - + -...

PARTS LIST CTK-750 Notes: 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", publishedseparately. 3. The numbers in item column correspond to the same numbers in drawing.

— 3 — BLOCK DIAGRAM KC0 ~ KC7 SI0 ~ SI7 FI0 ~ FI7 Key Touch LSI HG52E35P Working StrageRAM (256K-bit) HM62256ALP-10 Working StrageRAM (256K-bit) HM62256ALP-10 7-Segment LED LO0 ~ LO4 LED driver BA612 LD0 ~ LD7 KO0 ~ KO7 Buttons KI1 ~ KI7 VDD Power Switch MIDI IN OUT EA0 ~ EA14 ED0 ~ ED7 DSP HG51A115...

— 4 — CIRCUIT DESCRIPTION Key Matrix Key Second contact 2 First contact 1 FI KC SI Note: Each key has two contacts, the first conatct 1 and second contact 2 . KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7 FI0 C2 1 C#2 1 D2 1 D#2 1 E2 1 F2 1 F#2 1 G2 1 SI0 C2 2 C#2 2 D2 2 D#2 2 E2 2 F2 2 F#2 2 G2 2 FI1 G#2 1 A2 1 ...

— 9 — DSP HG51A115A01FD Effect RAM (256K-bit) HM65256BLP Sound Source ROM TC5316200CP-C081 CE A0 ~ A19 D0 ~ D15 RA0 ~RA19 RD0 ~RD15 RA22 D0 ~ D7 A0 ~ A3 LSIS RDAPO WRAPORESET SOLP BOK WOK1 EA0 ~EA14 ED0 ~ED15 CS WE OE D0 ~ D15 A0 ~ A14 ECEB EOEB EWEB PG 16.384MHz DAC UPD6376CX LOUT ROUT SOLP: Sound ...

— 11 — The following table shows the pin functions of the key touch LSI. Pin No. Terminal In/Out Function 1 REQB Out Interrupt request. Not used. 2, 3 FI10, SI10 In Key input signal 4 VCC In +5V source 5 CRDB In Read enable signal 6 CWRB In Write enable signal 7 CCBB In Chip select signal 8, 9 T, ST...

— 12 — Power Amplifier (LA4620) The power amplifier is a two-channel balanced amplifier with standby switch. The following figure showsthe internal diagram of the amplifier. Internal Diagram of LA4620 InputAmp. Pre-driveAmp. PowerAmp. RL ShortProtector InputAmp. Pre-driveAmp. PowerAmp. TerminalProte...

— 13 — WIRING DIAGRAM FI1FI2FI0SI0SI1SI2SI3FI3 KC0KC1KC2KC3KC4KC5KC6KC7 KC0KC1KC2KC3KC4KC5FI4SI4 KC6KC7SI5SI6SI7FI5FI6FI7 LG PWLD KO7 KO6 KO5 KO4 KO3 KO2 KO1 KO0 POWER KI1 KI2 KI3 KI4 KI5 KI6 KI7 La Lb Lc Ld Le Lf Lg Lp M615T-KY2M M615T-KY1M CD1CD2CD3CD4CD5CD6CD7CD8 CC1CC2CC3CC4CC5CC6CC7CC8 CB1CB2CB...

— 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

— 17 — 11.6 11.6 11.4 10.9 10.9 5.2 0.0 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 SCHEMATIC DIAGRAMS Main PCB M5712-MA1M

— 21 — IC LEAD IDENTIFICATION AND INTERNAL DIAGRAM TIMING GENERATOR SHIFT REGISTER LATCH MAIN DAC SUB DAC SUB DAC MAIN DAC LRCK 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 + - + -...

PARTS LIST CTK-750 Notes: 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", publishedseparately. 3. The numbers in item column correspond to the same numbers in drawing.