NAD C 315BEE Service Manual page 9

MICROPROCESSOR CONNECTION DIAGRAM
Volume
Circuit
Main Mute
Circuit
Record Out
Mute Circuit
V
IC503
S
IR receiver
G
IC502
24C01
X501
11.0592MHz
C504 C505
27P
27P
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U301
TC9164
Input Selection IC
DATA
CLK
STB
IC501
AT89S51
18V Power Supply
Sandby control line
Control Circuit
D501
Standby LED
BLUE
AMBER
RED
Input selection
Keys and LEDS
PHONE5
MP IN