LG 42LC7D (CHASSIS:LA73E) Service Manual ▷ View online
- 21 -
- Video signal path for Composite/S-Video/IF
MNT_V_Out
SD_CVB
S
CXA2069
OUT
3
Side A
V
V,LR
Rear A
V
V, LR
Rear S
YC, LR
Side S
YC, LR
IN1
IN4
IN1
IN4
IN3
IN4
Comp_1
LR
Comp_2
LR
RGB(Phone)
LR
BCM3550
SD_Y
SD_C
ANT/ Cabl
e
T
V
IN
CVBS from
T
UNER
FMS6400
Y/CVBS
C
OUT
1/
Y
OUT
1/
C
M_CVBS/Y
C
M_CVBS
C
Y
LPF f
o
r
CVBS
SD_CVB
S
TUNER
IF_P
IF_N
IF_P from
T
U
N
E
R for DT
V
IF_N from T
UNER for DT
V
- 22 -
- Video signal path for Composite
C
o
m
p1_
Y
8
(3A)
C
o
m
p1_Pb
11
(2A)
C
o
m
p1_P
r
16
(1A)
C
o
m
p2_
Y
9
(3B)
C
o
m
p2_Pb
14
(2B)
C
o
m
p2_P
r
1
(1B)
2
12
7
SW1 SW2 SW3
6
(Out
3)
C
o
mp
_
Y
5
(Out
2)
C
o
mp
_
P
b
3
(Out
1)
C
o
mp
_
P
r
L
H
8
(3A)
11
(2A)
16
(1A)
RGB
_
G
9
(3B)
R
G
B_
B
14
(2B)
RGB
_R
1
(1B)
2
12
7
SW1 SW2 SW3
6
(Ou
t3
)
Y
/G to
L
P
F
5
(Out
2)
P
b
/B
t
o
LP
F
3
(Ou
t1
)
P
r/
R
to
LP
F
L
H
IC500
1
IC500
2
Y
/G
3
(Y
IN
)
Pb
/B
5
(P
BIN)
Pr/R
7
(P
BIN)
1
(E
XT
_
S
YNC)
18
(S
YNC
_IN)
16
C
o
mp_Y
15 C
o
mp_
Pb
14 C
o
mp_
P
r
44
(G
IN+)
43
(S
OGIN)
41
(B
IN+)
46
(RIN+)
IC704
IC400
9
RGB
_
G
H S
y
n
c
740
4
V S
y
nc
RGB
_B
RGB
_R
BCM3550
GP
IO
GPIO for sy
n
c
sele
ct
ion
HD-DVI
D
a
ta
[24]
H sy
n
c
/V
sy
n
c
/DE/Clock
H,V Sy
nc/Cloc
k
RGB
_HS
GPIO for sy
n
c
sele
ct
ion
RGB
_HS
R
G
B_
VS
RGB_H
S
RGB_VS
GP
IO
GPIO fo
r Co
m
ponent
1
GP
IO
GPIO fo
r Co
m
ponent
2
GPIO fo
r Co
m
ponent
2
GPIO fo
r Co
m
ponent
1
IC100
1
FMS6407
MST3361
MM1
73
1
MM1
73
2
DA
TA
_
O
U
T
H/
V/DE/CLK
LP
F_
C
T
RL0
LP
F_
C
T
RL1
LP
F_
C
T
RL0
LP
F_
C
T
RL1
- 23 -
- Video signal path for HDMI
IC704
BCM3550
GP
IO
GPIO fo
r Inte
rr
upt
HD-DVI
Dat
a [0: 23]
H sy
n
c
/V
sy
n
c
/DE/Clock
H,V Sy
nc/Cloc
k
GP
IO
GPIO fo
r Pow
e
r
dete
ct
ion
1
GP
IO
GP
IO
fo
r
Ho
t p
lug de
te
ct
ion 1
IC100
1
MST3361
TMDS1 RX0+/-
TMDS1 RX1+/-
TMDS1 RX2+/-
TMDS1 RX3+/-
DD
C SDA
1
DD
C SCL
1
EEP
ROM
For
EDI
D
DD
C SDA
1
DD
C SCL
1
TMDS1
INPUT
DDC
1
INPUT
TMDS2 RX0+/-
TMDS2 RX1+/-
TMDS2 RX2+/-
TMDS2
RX
3
+
/-
DD
C SDA
2
DD
C SCL
2
EEP
ROM
For
EDI
D
DD
C SDA
2
DD
C SCL
2
TMDS2
INPUT
DDC
2
INPUT
H
DCP
SD
A
H
DCP
SC
L
EEP
ROM
For
HD
C
P
NDA
NCL
INT
DATA_
OUT
H,V Sy
nc/DE
/Clock
HDMI 1
HDMI 2
GP
IO
GPIO fo
r Pow
e
r
dete
ct
ion
2
GP
IO
GP
IO
fo
r
Ho
t p
lug de
te
ct
ion 2
GPIO fo
r Pow
e
r
dete
ct
ion
2
GP
IO
fo
r
Ho
t p
lug de
te
ct
ion 2
GPIO fo
r Pow
e
r
dete
ct
ion
1
GP
IO
fo
r
Ho
t p
lug de
te
ct
ion 1
- 24 -
- Audio signal path for all
SIF from T
U
N
E
R
CXA2069
Side A
V
V,LR
Rear A
V
V, LR
Rear S
YC, LR
Side S
YC, LR
IN1
IN4
IN1
IN4
IN3
IN4
Comp_1
LR
Comp_2
LR
RGB(Phone)
LR
OUT
1/
R
OUT1/L
A
N
T/ Cable
TUNER
AU
D
IO
A
D
C
(C
S
5331
)
Audio R
I2
S_S
C
K_I
N
Audio L
BCM3550
SIF
I2
S
_
LRCH
_IN
I2
S
_
LRCK
_
IN
I2S_SCK_IN
I2S_LRCH_IN
I2S_LRCK_IN
SPDIF_IN_P
S
P
D
IF
f
ro
m
M
S
T3361
_R
MNT_Out
AU
D
IO
D
A
C
(C
S
4344
)
I2S_SCK_OUT
I2S_LRC
H_O
U
T
I2S_LRCK_OUT
I2
S_S
C
K_O
U
T
I2
S
_
LRCH
_
O
UT
I2
S
_
LRCK
_
O
U
T
_L
MNT_Out
A
n
alog L_OUT
Audio
AMP
(T
PA3100
)
SPDIF Out
SPDIF_OUT
_
P
AUD_LEFT
_
P
AUD_LEFT
_
N
AUD_RIGHT
_N
AUD_RIGHT
_P
S
PK_L_
P
S
PK_L_
N
S
PK_
R_
N
S
PK_
R_
P
A
n
alog R_OUT
M
C
3
307
(OP-
A
M
P)
IF_P from
T
U
NER for DTV
IF_N from
T
U
NER for DT
V
IF_P
IF_N
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