DOWNLOAD LG 52LG50FD-SA (CHASSIS:LJ82B) Service Manual ↓ Size: 5.28 MB | Pages: 62 in PDF or view online for FREE

Model
52LG50FD-SA (CHASSIS:LJ82B)
Pages
62
Size
5.28 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
52lg50fd-sa-chassis-lj82b.pdf
Date
PREV: LG 52LG50DC-UA (CHASSIS:LA84Z) Service Manual

LG 52LG50FD-SA (CHASSIS:LJ82B) Service Manual ▷ View online

- 41 -
C
2008
Flash
(32MB)
DDR1(128MB)
(16Mx16x4)
DDR1(128MB)
(16Mx16x4)
TEA6420
Audio 
SW
MT
V416
(Micom)
NTP3000
(Digital AMP)
64Bit I/F
RGB-
P
C
HDM
I
1/2
/3
COMP 1
COMP 2
AV1
AV2
RGB-
P
C
I2S
MCLK
Digital out
COMP1
COMP2
AV1
AV2
B
C
M
7412
(MPEG4 
D
eco
de
r)
Analog 
/Digital 
Tuner
TC
9051
2
DVI
I2S
SIF
SPDIF Out
CVB
S
CVBS/Y/C
Y/Cb/Cr
R/G/B 
DDR1
(64MB)
CS5340
L/
R
Se
ria
l TP
20b
its
12b
it YC
 4
:2:2
NIM TUNER
TMDS_
RX+-
EPM240F
MNT out (Audio Only
)
T
M
D
S
341
A
(3x1
,S
/W
)
CVBS/Y/C
MC33078
(A
M
P
)
L/
R
R
S
232
RX/TX
DVI
4:
2:2 20bit YC
Full H
D
(1080
P)
WXGA(
7
6
8
P
)
RF
Sw
it
c
h
DM1/DP
1
Se
ria
l
TP
74HC
04
SPDIF Out
(Co
axi
al)
Video 
Fro
nt
 
End
Du
al
HDMI
Rx
HD/SD
Video
Encoder
Aud
io
DSP
USB2.0
PKT
HSX
PCI/
EBI
HD-DVI
IB
0
Pa
rs
e2
RSBUF
XCBUF
RMX0
BCM3553
Local KEY
24
C16
74LV
C
14AP
W
X-tal(54M)
R
eset
K
IA7029
NVRAM
I2C
Analog TV Audio
C
2008
- 42 -
Check video output
Follow procedure All source audio trouble 
shooting 
Y
Follow procedure analog TV video 
trouble shooting
N
N
Maybe BCM3553 audio block has 
problems. Replace it
Check L801 voltage level 5V
Replace it
N
Y
Check SIF signal
C801 / C806 / Q800
Replace it
N
Y
Check SIF signal
R726 / C665
Replace it
N
Y
Analog TV Audio
- 43 -
C
2008
Flash
(32MB)
DDR1(128MB)
(16Mx16x4)
DDR1(128MB)
(16Mx16x4)
TEA6420
Audio 
SW
MT
V416
(Micom)
NTP3000
(Digital AMP)
64Bit I/F
RGB-
P
C
HDM
I
1/2
/3
COMP 1
COMP 2
AV1
AV2
RGB-
P
C
I2S
MCLK
Digital out
COMP1
COMP2
AV1
AV2
B
C
M7412
(MPEG4 
D
eco
de
r)
Analog 
/Digital 
Tuner
TC
9051
2
DVI
I2S
SIF
SPDIF Out
CVB
S
CVBS/Y/C
Y/Cb/Cr
R/G/B 
DDR1
(64MB)
CS5340
L/
R
Se
ria
l TP
20b
its
12b
it YC
 4
:2:2
NIM TUNER
TMDS_
RX+-
EPM240F
MNT out (Audio Only
)
T
M
D
S
341
A
(3x1
,S
/W
)
CVBS/Y/C
MC33078
(A
M
P
)
L/
R
R
S
232
RX/TX
DVI
4:
2:2 20bit YC
Full H
D
(1080
P)
WXGA(
7
6
8
P
)
RF
Sw
it
c
h
DM1/DP
1
Se
ria
l
TP
74HC
04
SPDIF Out
(Co
axi
al)
Video 
Fro
nt
 
End
Du
al
HDMI
Rx
HD/SD
Video
Encoder
Aud
io
DSP
USB2.0
PKT
HSX
PCI/
EBI
HD-DVI
IB
0
Pa
rs
e2
RSBUF
XCBUF
RMX0
BCM3553
Local KEY
24
C16
74LV
C
14AP
W
X-tal(54M)
R
eset
K
IA7029
NVRAM
I2C
Component/RGB/A
V Audio
- 44 -
C
2008
Check video output
Y
Follow procedure external 
input video trouble 
shooting
N
Check Connector
J700 / J702 (Component)
J703 (RGB)
J701 / P700 & cable (AV Rear, AV 
Side)
Replace connector
N
Y
Check signal
C734 / R746 / C735 / R752 
(Component1)
C736 / R829 / C737 / R833 
(Component2)
C733 / R837 / C732 / R838 (RGB)
C701 / R816 / C700 / R817 (AV Rear)
C729 / R858 / C728 / R859 (AV Side)
Replace it
N
Y
Check IC500 power L512 voltage 
level 9V
Replace it
N
Y
Check signal
R532 / R533 / C555 / R568 / C563 / 
R582
Replace it or IC500
N
Y
Check IC503 power L513 voltage 
level 9V
Replace it
N
Y
Check signal
C554 / R569 / R581 / C562
Replace it or IC503
N
Y
Check IC502 power L514 voltage 
level 3.3V & L515 voltage level 5V
Replace it
N
Y
Check IC502 power L514 voltage 
level 3.3V & L515 voltage level 5V
Replace it
N
Y
Check I2S signal
R548 / R549 / R550
Replace it or IC502
N
Y
Check Audio clock
R134
Replace it
N
Y
Maybe BCM3553 has problems
Component/RGB/AV Audio
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