Read LG 32LH70YR (CHASSIS:LP91D) Service Manual online
- 17 -
BLOCK DIAGRAM
RG
B
_
P
C
PC
_
A
u
d
io
TV
(R
F
)
COM
P
1
HDM
I1
HDM
I2
HDM
I3
R
S
232
TX
2
32C
D
riv
e
r
S
T
3232C
Tx
/
R
x
:
±
15V
p
p
P
C
_
R
/
G
/B
/H
S
/
V
S
PC
_
A
u
d
io
_
L
/
R
:
700m
V
rm
s
MN
T
_
V
O
U
T
:
1V
p
p
AV
2
_
V
IN
:
1V
p
p
AV
2
_
LI
N
/
R
IN
:
500
mV
rm
s
L
_
S
PK_
O
U
T
R
_
S
PK_
O
U
T
EEP
R
O
M
24C
02
Co
m
p
1
_
L
/
R
:
500m
V
rm
s
TU
N
E
R
AV
1
_
V
IN
:
1V
p
p
AV
1
_
L
IN/
R
IN
:
500m
V
rm
s
PW
M
N
T
P
3100L
MNT
_
O
U
T
MNT
_
LO
U
T
/
R
O
U
T
:
500
mV
rm
s
AV
2
M
A
IN
SC
A
L
ER
LGE
3
7
6
x
A
TX
D
/
R
X
D
:
5V
D
ig
it
a
l
COM
P
1
_
Y
/
P
b
/
P
r
:
1/
0.
7V
p
p
COM
P
2
_
Y
/
P
b
/
P
r
:
1/
0.
7V
p
p
IR
HDM
I_
DA
T
A
_
1
HDM
I_
DA
T
A
_
2
TU
_
M
A
IN
S I
F
CO
M
P
1
_
Y
/
P
b
/
P
r
:
1/
0.
7V
p
p
AV
1
_
V
IN
PC
_
A
u
d
io
_
L
/
R
COM
P
1
_
L
IN
/
R
IN
L_
C
H
R_C
H
FR
CL
VDS
con
nec
tor
TU
_
M
A
IN
M
_
SC
L
/
SD
A
M
_
SC
L
/
SD
A
EEP
R
O
M
24C
02
SI
F
AV
1
_
LI
N/
R
IN
MNT
_
L
/
R
O
U
T
AV
1
MN
T
_
OUT
Co
m
p
2
_
L
/
R
:
500m
V
rm
s
CO
M
P
2
_
Y
/
P
b
/
P
r
:
1/
0.
7V
p
p
COM
P
2
_
L
IN
/
R
IN
COM
P
2
P
C
_
R
/G
/B
/H
S
/
V
S
DDC_SCL1/SDA1
DDC_SCL1/SDA2
DDC_SCL1/SDA3
DS
U
B
_
S
CL
/S
DA
MNT
_
V
O
UT
AV
2
_
V
IN
AV
2
_
LI
N/
R
IN
IIS
_
O
U
T
US
B
US
B
_
D
P
/
D
N
AU
D
IO
AM
P
HDM
I_
DA
T
A
_
3
TM
D
S
TM
D
S
TM
D
S
EEP
R
O
M
24C
02
FUL
LH
DL
VD
Sc
on
ne
cto
r
FR
C
IC
L
G
E
7329A
UR
S
A
_
[C
~
D
]
UR
S
A
_
[
A
:B
]
OP
C_
E
N
D
D
R2
S
D
RA
M
(2
*
256M
B)
S
e
ri
al
F
las
h
PS
U
RL
_
O
N
/
I-D
IM
M
IN
G
/
D
IS
P
_
E
N
PA
N
E
L
_
ST
A
T
U
S
E-
D
IM
OP
C
_
O
U
T
Bl
u
e
to
o
th
Ci
rc
u
it
BL
T
_
D
P
/
D
N
D
D
R2
S
D
RA
M
(512M
B
)
EEP
R
O
M
(256K
)
Se
ri
a
l F
la
s
h
(8
M
B
y
te
)
EEP
R
O
M
fo
r H
D
C
P
(8
K
)
EEP
_
S
C
L
/
S
D
A
EEP
_
S
C
L
/
S
D
A
M
E
M
C
_
R
XE2
±
M
E
M
C
_
R
XE4
±
ME
M
C
_
R
X
C
3±
ME
M
C
_
R
X
C
±
M
E
M
C
_
R
XE1
±
M
E
M
C
_
R
XE0
±
ME
M
C
_
R
X
O
2±
ME
M
C
_
R
X
O
4±
ME
M
C
_
R
X
O
3±
ME
M
C
_
R
X
O
C±
ME
M
C
_
R
X
O
1±
ME
M
C
_
R
X
O
0±
EEP
R
O
M
24C
02
M
_
SC
L
/
SD
A
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