LG 47LB5DF (CHASSIS:LA73A) Service Manual ▷ View online
- 41 -
Ch
eck M
S
P4450
K
(I
C
508
) o
u
tp
u
ts
R
5039
(S
C
L
K
), R5040
(L
R
C
L
K
),
R
5043
(D
A
T
A
)
1
2
3
5
6
7
Fol
lo
w
the pr
o
c
ed
ur
e of
“
COMMON S
O
U
ND
OUT
”
Ch
eck MSP4450
K
(IC
508
) Inp
u
ts
R
5041
(A
V1_R
),
5042
(A
V1_L
),
R
5045
(A
V2_R
),
R
5046
(A
V2_L
),
R
5048
(C
M
P
1_
R)
,R
5049
(C
M
P
1_L
),
R
5051
(C
M
P
2_
R)
,5052
(C
M
P
2_
L
),
R
5055
(R
G
B
_R
), R
5058
(R
G
B
_L
)
Ch
eck A
V
/C
O
M
PO
N
E
N
T
/R
G
B
Ca
ble
Ch
eck X260 (
IC101
)
In
pu
ts
R1
7
5(SCLK),
R
1
7
6(LRCLK),
R1
7
7(D
A
T
A
)
Ch
eck M
S
P4450
K
(I
C
508
)
X-
ta
l
Inp
u
t
X-ta
l
Input
(7
1
,7
2p
in)
Ch
eck M
S
P4450
K
(I
C
508
) Po
w
er
4
- 42 -
EXT1/2
AT
/N
T
TUNER
LGDT
3303
X260
TP A
TP C
RGB
COMP 1/2
SIF
SIF IN 1
NTP
3000
SIF IN 2
I2S IN 1
I2S IN 2
I2S OUT 1
SPDIF
ØØ
CS8416
I2S
I2S
I2S
I2S
S/PDIF
SPDIF
L/R
L/R
L/R
L/R
ANT/Ca
ble
VSB TP
MSP4450K
MNT
OUT
I2S
I2S
I2
SI
3
I2
SO 1
SC 2
MCLK
MCLK
SPDIF OUT
Optical
Coaxial
HDMI 1/2/3
- 43 -
Check CS8416 (
IC501)
inputs
HD
MI
_S
PD
IF
(C
5005
)
1
2
3
4
5
Fol
lo
w
the pr
o
c
ed
ur
e of
“
COMMON
S
O
UND OUT
”
6
Ch
eck M
S
T3361 (
IC402
)
o
u
tp
u
t
HDMI_S
PDIF
(R4
0
9)
Ch
eck H
D
M
I Cab
le
Ch
eck X260 (
IC101
)
In
pu
ts
SCLK(R1
7
5),
LR
CLK(
R
176
),
D
A
T
A
(R
177
)
Ch
eck C
S
8416 (
IC
501
) ou
tp
u
ts
DA
TA
(#26
),
SC
LK
(#27
),
L
R
C
L
K
(#28
)
- 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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