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