Read LG 37LG50FR / 37LG55FR (CHASSIS:LP81A) Service Manual online
- 22 -
BLOCK DIAGRAM
A
V1 in
SideA
V in
(A
V2 in)
Comp1 in
Comp2 in
RGB in
(D/L)
A
V
out
CVBS I
N
Y/Pb/
P
r I
N
R/G/B
/HS/
VS IN
CVBS I
N
LIN
E OU
T
L
IN
E IN
L
IN
E_MUTE
RS-232C
Rx/Tx
MX3232
RF
(T
uner)
PC Audio
in
DISPLA
Y
MODULE
EDI
D
N
V
M
EDI
D
N
V
M
HDMI1
HDMI2
HDMI3
USB
T
M
DS3
51
P
A
G
H
D
MI M
U
X
Zoran
V
A
D
D
IS-966
X
D
MPEG D
e
c
o
der
D
D
R MEM
D
D
R MEM
SERIA
L
FLA
S
H
Mstar
Rome
o
LGE6
8
9
1
C
D
TW991
0
Sub D
e
c
oder
NTP
300
0
A
D
ig
ital
Aud
io A
M
P
MAIN N
V
M
MC74HC4
0
6
6
A
u
d
io SW
LM324
X4 AMP
SERIA
L
FLA
S
H
B
D
204
1
P
ro
tect I
C
EDI
D
N
V
M
D
D
C/HD
P
/CEC
T
M
DS(H
DMI in)
D
D
C/HP
D/CEC
T
M
DS(H
DMI in)
T
M
DS(H
DMI in)
U
S
B
(A
V I/O
,
D
a
ta
I/O)
+5V
CVBS O
U
T
6
5
6 IN
SW_RE
S
E
T
P
A
R
T_I2
C
P
A
R
T_I2
C
SW_RE
S
E
T
I2S O
U
T
LV
D
S
MPEG RX/
T
X
MPEG RES
E
T
I2S I
N
6
5
6 IN
T
M
DS(H
DMI in)
D
D
C/HP
D/CEC
D
D
C/HP
D/CEC
[CEC not
through H
DMI MUX, d
irec
t
J
A
CK to MAIN
IC]
DD
C
DD
C
DD
C
U
A
R
T_Rx/Tx
A
U
DIO
_
S
W
L
IN
E IN
L
IN
E IN
L
IN
E IN
Y/Pb/
P
r I
N
L
IN
E IN
Y/C IN
L
IN
E IN
EDI
D
N
V
M
ROM_I2C
DSU
B
_
D
D
C
x
0
.55
x
0
.55
x
0
.55
x
0
.55
S
_
V
IDEO
_
D
E
T
L
IN
E_MUTE
LIN
E OU
T
CVBS O
U
T
x4
x4
x
0
.55
L
IN
E IN
CVBS I
N
SIF I
N
TUNE
R_I2C
P
A
R
T_I2
C
H
D
MI_SEL
Click on the first or last page to see other 37LG50FR / 37LG55FR (CHASSIS:LP81A) service manuals if exist.