Block Diagram - Casio CTK-500 Service Manual

Output
Power Amp.
LA4127
IC2
Speakers

BLOCK DIAGRAM

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