Casio CTK-750 manual Block Diagram, UPD6376CX

Page 5

BLOCK DIAGRAM

Keyboard

	FI0 ~ FI7	KC0 ~
	SI0 ~ SI7	KC0 ~
	SI0 ~ SI7	KC7

Key Touch LSI

HG52E35P

Gate Array

UPD65005C-578

D0~D7

A0 ~ A15

	7-Segment	LO0 ~ LO4	LEDs
	LED	LO0 ~ LO4	LEDs
	LED

LED driver

BA612

KO0 ~ KO7

LD0 ~ LD7

CPU	KI1 ~ KI7

HD6433298A18P

POWER

Buttons

VDD

A0 ~ A2

Working Strage

RAM (256K-bit)

HM62256ALP-10

A0 ~ A14

Power Switch

OUT IN

MIDI

APO

A0 ~ A3

Effect RAM	EA0 ~ EA14
Effect RAM
(256K-bit)
HM62256ALP-10	ED0 ~ ED7
	ED0 ~ ED7

RA0 ~ RA19

DSP

HG51A115A01FD

RD0 ~ RD15

WCK1 SLOP BCK

D/A Converter

UPD6376CX

Sound Source ROM

(16M-bit)

TC5316200CP-C081

Output

Speakers

Filter		Filter

Main

Volume

Power Amplifier

LA4620

VD LVDD DVDD

VCC AVDD VDD

Power Supply Circuit

Q1 ~ Q7

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Contents CTK-750 Contents General SpecificationsElectrical Replacing the DSP HG51A115A01FDUPD6376CX Block DiagramKey Matrix Circuit DescriptionNomenclature of Keys Reset CircuitButton Matrix MidiPin No Terminal In/Out Function CPU HD6433298A18PGate Array UPD65005C-578 Digital Signal Processor HG51A115A01FD Block diagram of DSP and DAC circuit Key Touch LSI HG52E35P Filter Block Power Supply Circuit Power Amplifier LA4620Name Voltage For operation AvddM5712-CN1M Wiring DiagramMajor Waveforms Page PCB View and Major Check Points Schematic Diagrams Console PCB M5712-CN1M Keyboard PCBs M615T-KY1M, KY2M Exploded View S8053ANO IC Lead Identification and Internal DiagramM5218APR PC900VBe C B Q2 2SD1762E,F Q4 2SB1274EB C E Parts List N N FOB Japan Code No Parts Name Specification Yen Unit Price Lower Case Screws MA0300941A