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Features of Main board
CN22 (4PIN/2.54): SPEAKER CONNECTOR
NO.
SYMBOL
1
L
S
P
K
2
GND
3
GND
4
R
S
P
K
CN24(4PIN/2.54): AMPLIFIER POWER SUPPLY CONNECTOR
NO.
SYMBOL
1
24V
2
24V
3
G
N
D
4
G
N
D
DESCRIPTION
A
u
d
o i
L
e
t f
C
h
a
n
n
l e
O
u
p t
t u
Ground
A
u
d
o i
R
g i
t h
C
h
a
n
n
l e
O
u
p t
t u
DESCRIPTION
+24V DC Power Supply
G
o r
u
n
d
G
o r
u
n
d
-21-
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