LG 47LB5DF (CHASSIS:LA73A) Service Manual ▷ View online
- 33 -
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
- 34 -
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
- 35 -
Che
ck N
T
P
30
00 (IC50
5) Po
w
er
Che
ck N
T
P30
00 (I
C50
5)
Inputs pi
ns
#17(DA
TA
),
#18(LRCL
K), #19(S
CL
K), #6(M
CL
K)
1
2
3
4
5
6
7
Chec
k X
260
(
IC1
01
)
O
u
tput
R15
3(S
C
L
K), R154
(LRCL
K), R155(DA
T
A
), R156(MCLK)
Che
ck N
T
P
30
00 (IC505)
Output
L510,L
511(Left) / L512,L
513(
Right)
Che
ck
Spe
ake
r ou
tput w
afer
P5
02(Left), P501(Right)
Che
ck N
T
P
30
00 (IC505)
Output
L515,L
516(Left)
L517,L5
18(Right)
Che
ck Spe
ake
r
All Source Speaker Out
Che
ck MS
P44
50
K (IC508)
Output
R50
62 (Left), R5063 (Right)
1
2
3
4
If
DTV or HD
M
I i
nput
Chec
k X
260
(
IC1
01
)
O
u
tput
R15
3(S
C
L
K), R154
(LRCL
K), R155(DA
T
A
)
Che
ck M
S
P44
50
K (I
C508)
Input
R5059(SCL
K) R5060(LR
CL
K),
R5061(DA
T
A
)
Che
ck
M
N
T Output Jack (J704)
Monitor L,R Out
Che
ck M
S
P44
50
K (IC508)
Po
w
er
5
Che
ck M
S
P44
50
K (IC508)
X-tal
Inpu
t
X-tal
Input (71,
72p
in
) :
18.
432
M
H
z
6
If
AT
V,
A
V
, Component,
RGB input
Che
ck M
S
P44
50
K (I
C508)
Input
C50
16(
A
T
V_
SIF), R5041(
A
V
1_
R),
R5
042(
A
V
1_L),
R50
45(
A
V
2_
R), R5
046(
A
V
2_L), R50
48
(C
M
P
1_
R),
R50
49(C
MP
1_L), R50
51(C
MP
2_
R), R50
52(C
MP
2_L),
R5055(RGB
_R),
R
5058(RGB_L)
Che
ck C
S
84
16(IC5
01) Input
C50
06 (X
26
0_
S
P
DIF) or
C50
05
(HDM
I_
SP
DI
F
)
Che
ck C
S
84
16(IC5
01) Ou
tput
R59
0 (841
6_
S
P
DIF_out)
1
2
3
4
Che
ck C
S
84
16 (IC501)
Po
w
er
Che
ck S
P
DIF
Jack
P5
00 (Optical SPD
IF Jack) and
P5
01 (Coa
xial S
P
DIF Jac
k)
Digital Audio Out
- 36 -
AT
/N
T
TUNER
LGDT
3303
X260
TP A
HDMI 1/2/3
TP C
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
ANT/Ca
ble
VSB TP
MSP4450K
I2S
I2S
I2
SI
3
I2
SO 1
MCLK
MCLK
SPDIF OUT
Optical
Coaxial
EXT1/2
RGB
COMP 1/2
SIF
L/R
L/R
L/R
L/R
MSP4450K
MNT
OUT
I2
SI
3
I2
SO 1
SC 2
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