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D
X
3
4
R
-
U
D
X
3
4
R
-
U
n
n
d
d
S
u
p
p
o
r
t
2
U
S
S
u
p
p
o
r
t
2
U
S
This motherboard provides 4
are two connectors on the PC99 back panel. You can use proper cable to connect other USB connectors to the back panel or
front panel of chassis.
1
+5V
+5V
SBD2-
SBD3-
SBD2+
SBD3+
GND
GND
KEY
NC
U
S
B
2
C
o
n
n
e
U
S
B
2
C
o
n
n
e
B
P
o
r
t
B
P
o
r
t
USB
connectors to connect USB devices, such as mouse, keyboard, modem, printer, etc. There
Pin 1
c
t
o
r
c
t
o
r
49
O
n
l
i
n
e
M
a
n
u
a
l
O
n
l
i
n
e
M
a
n
u
a
l
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Table of Contents
Troubleshooting
