Read LG 52LB9DF-UA / 52LBX (CHASSIS:LA73C) Service Manual online
- 44 -
1. USB 1.1 Block Diagram For EMF
Ch
eck t
h
e de
vi
c
e
p
o
w
er
LE
D
Ch
eck t
h
e de
vi
c
e
C
a
b
le.
Is
i
t
U
S
B1.1
ca
ble
?
If
th
e de
vi
c
e
i
s
HDD, che
c
k a
ex
te
rn
al
po
w
er
a
d
ap
to
r.
Ch
eck V
B
U
S
_5V
Ch
eck t
h
e D
C
/D
C
C
o
n
ver
te
r
(I
C712
)
N
Y
Y
N
N
2. Check S
equence
Re
place
t
h
e
ca
ble
t
o
U
S
B1
.1
cab
le
or
Re
p
lace t
h
e
d
e
vice.
Y
N
Rep
la
c
e th
e
DC/
DC Con
ve
rter
(I
C712
)
•E
xception
-U
SB
power
coul
d be disa
bl
ed by
in
rushi
ng current
-I
n
th
is
case
, re
mo
ve the de
vice
and try to
rebo
ot the
TV (
A
C
pow
er
off/on
)
X260
USB_ link
(IC10
1)
DC/DC Conv
er
te
r
(IC7
12
)
J
A
C
K
Si
de B/D
USB1.1_OVRCUR
5V_
U
S
B
VBUS
_5
V
DP,DM
Cab
le
USB_PWR_DOWN
DEVICE
(HDD or Me
mor
y)
USB 1.
1
c
ab
le
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