LG 49LF550T, Service Manual

Page: 14 / 77

- 14 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
BLOCK DIAGRAM
1. MAIN
(P
1801
)
30P HD LV DS wa fer
51P FHD LVDS wa fer
(P
1800
)
Se
rial
Fl
as
h
(8
Mb
it)
IC1300
SPI
_S
CK/S
DI/S
DO
/C
S
Sy
st
em
E
EPR
OM
(2
56
Kb
it)
IC10
4
I2
C_
SC
L/
SD
A
RX
A0
+/
-~
RX
A4
+/
-,
RX
ACK+
/-
RX
B0
+/
-~
RX
B4
+/
-,
RX
BCK+
/-
SP
K_
R
SP
K_
L
AM
P_SC
L/
SD
A
AUD_
MA
ST
ER
_C
LK
,
AU
D_
LRCH
,
AU
D_
LRCK,
AU
D_
SC
K
ST
A3
80
BW
(IC3
401)
Co
nn
ect
or
(P
4600
)
K
EY1
/2
, LE
D_
R,
IR
X-ta
l
24M
Ma
in
SO
C
M1
A
-256
MB
built-in
(IC1
01)
CO
MP
2_L
/R
_I
N
CO
MP
2_Y
+/
AV
_C
VB
S_
IN,
CO
MP
2_P
b+
/P
r+
CK
+/
-,
D0
+/
-,
D1
+/
-,
D2
+/
-_
HDMI
2
DDC_
SC
L/S
DA
_2,
HDMI
_C
EC
REAR
HDMI
1
(JK
800)
SPD
IF
_O
UT
SPD
IF(
Op
tic)
(JK
1001)
SI
DE
US
B
(JK
700)
HDMI
2(
MHL)
(JK
801)
CK+
/-,
D0
+/
-,
D1
+/
-,
D2
+/
-,_
HDMI4
, DDC_
SC
L/S
DA
_4
, H
DMI
_C
EC
SI
DE
_U
SB
_D
M/DP
US
B
1_O
CP
/CTL
TU
_S
CL
/ SD
A
F/NIM
DE
MO
D_
SC
L/
SD
A
IF_
N/
P
IF_
AG
C
CO
MP
ON
EN
T
(J
K2
802
)
AV
2
AV
2_L
/R
_I
N
AV
2_C
VB
S_
IN
H
ead
phon
e
(J
K3
000)
HP
_L/R
OU
T,
SI
DE
_H
P_
MUTE
NA
ND
FL
AS
H
IC
102
(1Gb
it)
H
27U
1G8F
2C
TR
-B
C
TPS
65282
AV
DD5
V_
MHL,MHL_
OC
P
MHL_
CD_
SEN
SE
+5
V_
US
B
5V_
HDMI_
4