50
M
M
X
X
4
4
B
B
R
R
-
-
5
5
3
3
3
3
O
O
n
n
l
l
i
i
n
n
e
e
M
M
a
a
n
n
u
u
a
a
l
l
D
D
r
r
.
.
L
L
E
E
D
D
C
C
o
o
n
n
n
n
e
e
c
c
t
t
o
o
r
r
Connecting Dr. LED you can easily find the system problems that may occur while assembling. It can clearly indicate whether the
problem is caused from components or improper installation through the 8 LED lights of Dr. LED on the front panel. That is to say
you can diagnose your system status quickly.
Pin 1
2
1
6
5
3.3V
GND
GPO19
GPO20
GPO21
