Casio CTK-650 - page 13

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1OUT

VDD

VSS

S-8053ANO

2SB1274

M5218APR

1234

VCC

GND

S-81350HG

S-8053ANO

2SB1240

2SD1858

BCE 3

ECB

E C B

2SC1740

DTA114TS

2SA933

Contents

Main Page SPECIFICATION 2 BLOCK DIAGRAM CIRCUIT DESCRIPTION CPU(HD6433298A16P : H8/329) DIGITAL SIGNAL PROCESSOR, LSI-S (HG51A115A01FD) KEY TOUCH LSI(HG52E35P) POWER AMPLIFIER(LA4598) BUTTON MATRIX Nomenclature of Keys KEY MATRIX 9 WIRING DIAGRAM KI7 KI6 KI5 KI4 IC LEAD IDENTIFICATION AND INTERNAL CIRCUIT UPD6376CX (D/A converter) TC74HC174AP (HEX D-TYPE FLIP FLOP WITH CLEAR ) TC74HC08AP (QUAD 2-INPUT AND GATE) TC74HC00AP (QUAD 2-INPUT NAND GATE) Page PCB VIEW & MAJOR WAVEFORMS SCHEMATIC DIAGRAM 13