LG 47LC7DF (CHASSIS:LA73A) Service Manual ▷ View online
- 29 -
1 :
_
C
heck
H
D
CP
E
rr
o
r
_Retr
y
po
w
er off
and
on
(TV
or S
T
B/DVD
…)
_C
heck
MST3361
(I
C402
) H
D
C
P
IIC
l
ine
(#69,#70
)
2 :
_
C
heck
E
D
ID
D
o
w
n
lo
ad
(RX0C-,RX
0C+) :
Fre
q
ue
nc
y : D
if
fe
re
n
t
acc
o
rdin
g
t
o
format !
!
4 :
_
C
heck
M
S
T3361
(I
C402
)
Ou
tp
u
ts
SCL :
SD
A
:
3 :
_ MS
T3361(IC402)
inputs
(RX1C-,RX
1C+) :
(Vs
yn
c)
:
(DE) :
(Clk) :
(Hs
yn
c
)
59.94
H
z
Fre
q
ue
nc
y : D
if
fe
re
n
t
acc
o
rdin
g
t
o
format !
!
(Data)
:
5
: _Check X260
(I
C101)
Inputs
_S
ign
a
l sha
p
e i
s
s
am
e
(
abo
ve
)
Sno
w
noi
s
e (Whit
e d
o
t) ?
Po
w
er o
ff
an
d on
(TV or
STB/DVD…)
Vid
e
o
i
s n
o
rm
a
l & No
So
und
?
Check HDCP
P
o
w
er Pin(IC404),
MS
T
3361
(I
C
402)
II
C
(#69,#70
)
Ch
eck MST3361(
IC
402
)
in
pu
ts
Po
w
er, Osc
#25,#26
(R
X1
C
-,R
X
1C
+
),
#14,#15
(R
X0
C
-,R
X
0C
+
)
Re-do
w
nloa
d
ED
ID
(I
C406
/407/408
)
Ch
eck M
S
T3361(
IC
402
)
Ou
tp
u
ts
V-
o
u
t (#99
)
, H
-ou
t (
#98
) ,
Cl
ock (
#96
) , D
ata
1
2
3
4
N
Y
N
Y
Y
Ch
eck X260 (
IC101
)
In
pu
ts
MS
T
3361_
HS(
#
T
6) ,
MS
T
3361_V
S
(#T
5)
, C
lock (
#
P3)
,
Dat
a (
3
0Bit)
, D
E
(#U
6)
5
- 30 -
Sy
mptom : T
V
s
et out of ord
er on pow
er
s
Ch
eck X300 (
24M
H
z)
Norm
al
?
Re-do
w
nloa
d
MT
V416G
M
F
(
IC
309
)
Norm
al
?
YE
S
NO
Re
place
M
T
V416G
M
F
(I
C
309 )
an
d R
e-do
w
nload
Ch
eck
SI3865
(Q702
) 2,3
pi
n
5V
Normal
?
Re
place
P
o
w
er
b
o
ar
d
Norm
al
Check
P
702 all input
vo
ltage
Norm
al
?
YE
S
Ch
eck SI3865
(Q1901
,Q1902
,Q1903
)
2,3
p
in
3.3
V
Normal
?
YE
S
Ch
eck
SI3865
(Q702
) 5p
in
3
.3V
Normal
?
Ch
eck SI3865
((
Q
1901,Q1902
,
Q1903
)
5p
in
3.3
V
Normal
?
NO
NO
NO
Ch
eck P702
w
af
ers
&
co
n
n
ec
to
rs
.
Norm
al
?
YE
S
Ch
eck
P701 #3
,8P
in
5
V
Norm
al
?
YE
S
Re
place
po
w
er b
o
ar
d
NO
NO
Re
place
SI3865
(Q702
)
YE
S
Re
place
SI3865
(Q1901,Q1902,Q1903
)
YE
S
NO
YE
S
- 31 -
Sy
mptom : No booting
Ch
eck X300 (
24M
H
z)
Norm
al
?
Re-do
w
nloa
d
MT
V416G
M
F
(
IC
309
)
Norm
al
?
YE
S
Re
place
M
T
V416G
M
F
(I
C
309 )
an
d R
e-do
w
nload
Ch
eck
SI3865
(Q702
) 2,3
pi
n
5V
Normal
?
Ch
eck SI3865
(Q1901
,Q1902
,Q1903
)
2,3
p
in
3.3
V
Normal
?
YE
S
Ch
eck
SI3865
(Q702
) 5p
in
3
.3V
Normal
?
Ch
eck SI3865
((
Q
1901,Q1902
,
Q1903
)
5p
in
3.3
V
Normal
?
NO
NO
Re
place
SI3865
(Q702
)
YE
S
Re
place
SI3865
(Q1901,Q1902,Q1903
)
YE
S
NO
YE
S
Ch
eck SI4800
(
Q315
)1
,2,3Pi
n
1.9
V
Norm
al
?
Re
place
SI4800
( Q315
)
Re
place
S
C
2621
(I
C304
)
YE
S
NO
NO
Ch
eck
be
tw
ee
n
F
B
1714 a
n
d
C
345
1.2
V
Norm
al
?
Re
place
SI4800
( Q300
,Q301
)
Re
place
S
C
2621
(I
C304
)
NO
NO
NO
- 32 -
EXT1/2
AT
/N
T
TUNER
LGDT
3303
X260
TP A
HDMI 1/2/3
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
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