Casio CTK-650 - Control Locations Overview; Keyboard Control Identification

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 .............................................................................................
KEY MATRIX .....................................................................................................8
WIRING DIAGRAM ...................................................................................................
IC LEAD IDENTIFICATION AND INTERNAL CIRCUIT ..........................................10
PCB VIEW AND MAJOR WAVEFORMS .................................................................
SCHEMATIC DIAGRAM ...........................................................................................
PARTS LIST .............................................................................................................15
EXPLODED VIEW ....................................................................................................19
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