Casio CTK-500 - 2. Choosing a Power Supply; Battery Installation and Precautions; AC Power Adapter Usage

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LEDs
LED Driver
IC3
KO0 ~ KO5, KO17
OE
CE
A0 ~ A16
D0 ~ D15
43.45 MHz Clock
Keys and Switches
KO0 ~ KO16
KI1 ~ KI7
CPU
MSM6626-01
LSI1
ROM
MN232000CUQ
LSI2
ROUT
LOUT
Reset IC
S8053ANO
IC4
KO18
(APO)
VCCAVDDVDD
Power Amp.
LA4127
IC2
Output
Power IC
CA5668
IC1
Filter (R)
T5
Filter (L)
T6
Speakers
Main Volume
Control
X1
BLOCK DIAGRAM