Casio Official Manual for CTK-650 - Specifications and Circuit Details

CONTENTS
SPECIFICATIONS	1
BLOCK DIAGRAM	2
CIRCUIT DESCRIPTION
CPU (HD6433298A16P : H8/329)	3
DIGITAL SIGNAL PROCESSOR, LSI-S (HG51A115A01FD)	4
KEY TOUCH LSI (HG52E35P)	5
POWER AMPLIFIER (LA4598)	6
BUTTON MATRIX	7
KEY MATRIX	8
WIRING DIAGRAM	9
IC LEAD IDENTIFICATION AND INTERNAL CIRCUIT	10
PCB VIEW AND MAJOR WAVEFORMS	12
SCHEMATIC DIAGRAM	13
PARTS LIST	15
EXPLODED VIEW	19