Read LG 47LH30FR (CHASSIS:LP91A) Service Manual online
C
2009
- 22 -
BLOCK DIAGRAM
RGB
_PC
PC_
A
udi
o
TV
(RF)
COMP
1
HDMI1
HDMI2
R
S
232
TX
232
C
D
ri
v
er
S
T
3232
C
Tx
/R
x :
\\∑
15
Vp
p
PC_R
/G
/B
/HS
/V
S
PC_
A
u
d
io
_L/R
:
700
mV
rms
MNT_
OUT
:
1Vp
p
SIDE_V
:
1V
pp
SI
DE_
L
/SI
DE_
R
:
500m
Vr
ms
DDR2(51
2MB)
L_
SPK_
O
UT
R_S
PK
_
OUT
EE
PRO
M
24
C02
Comp
1
_
L
/R :
500m
Vr
ms
TUNER
A
V
1_VI
N
:
1V
p
p
A
V
11_LI
N/
R
IN
:
500m
Vr
ms
PWM
N
T
P3100
L
MNT_
OUT
MNT_LOUT/R
OUT
:
500m
Vr
ms
AV
2
(Sid
e
A
V
)
M
A
IN
SCALER
TXD
/RXD :
5V
Digit
al
C
O
M
P
1_Y
/P
b
/Pr
:
1/
0
.7V
p
p
C
O
M
P
2_Y
/P
b
/Pr
:
1/
0.7Vp
p
IR
HDMI_D
A
T
A
_
1
HDMI_D
A
T
A
_
2
HDMI1_SCL
/SDA
O
U
T_E_
TX_
C
L
K
\\∑
O
U
T_E_
TX_
E
\\∑
O
U
T_E_
TX_
D
\\∑
O
U
T_E_
TX_
C
\\∑
O
U
T_E_
TX_
B
\\∑
O
U
T_E_
TX_
A
\\∑
TU_M
A
IN
S
I F
C
O
M
P
1_Y
/P
b
/Pr
:
1/
0
.7V
p
p
A
V
1_VI
N
PC_
A
udi
o
_L/R
COMP
1
_
L
IN/RI
N
L_CH
R_CH
LV
DS
co
nnect
or
TU_M
A
IN
SUB_
SCL/
SD
A
EE
PRO
M
24
C02
EE
PRO
M
24
C02
SIF
A
V
1
_
L
IN
/RIN
MNT_L/R
OUT
AV
1
MNT_
OUT
Comp
2
_
L
/R :
500m
Vr
ms
C
O
M
P
2_Y
/P
b
/Pr
:
1/
0
.7V
p
p
COMP
2
_
L
IN/RI
N
COMP
2
O
U
T_O_T
X_
C
L
K
\\∑
O
U
T
_O_T
X_E
\\∑
O
U
T
_O_T
X_
D
\\∑
O
U
T
_O_T
X_
C
\\∑
O
U
T
_O_T
X_
B
\\∑
O
U
T
_O_T
X_
A
\\∑
PC_R
/G
/B
/HS
/V
S
HDMI2_SCL
/SD
A
PC_SCL/SD
A
MNT_V
OUT
A
V
2_VI
N
A
V
2
_
L
IN
/RIN
II
S
_
OUT
USB
USB_DN/
PN
AU
D
IO
AM
P
HDMI3_SCL
/SDA
EE
PRO
M
24
C02
HDMI_D
A
T
A
_
3
TMDS
TMDS
TMDS
HDMI3
USB
For D/
L
EE
PROM(2
5
6K)
Se
ri
al
Flas
h
(8MB
y
te)
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