DOWNLOAD LG 42LH40ED / 42LH45ED (CHASSIS:LJ92J) Service Manual ↓ Size: 5.93 MB | Pages: 76 in PDF or view online for FREE

Model
42LH40ED 42LH45ED (CHASSIS:LJ92J)
Pages
76
Size
5.93 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
42lh40ed-42lh45ed-chassis-lj92j.pdf
Date
PREV: LG 42LH40 (CHASSIS:LA92G) Service Manual

LG 42LH40ED / 42LH45ED (CHASSIS:LJ92J) Service Manual ▷ View online

4. Analog TV Video Trouble Shooting
Check RF Cable
Y
Check CVBS Signal
TU1100 #9 Pin
N
Y
Check CVBS Signal
CXA2069(IC1102) #62 Pin
N
Replace one of 
C1160/R1139/C1128
& Recheck
Y
Check CVBS Signal
CXA2069(IC1102) #53 Pin
N
Replace CXA2069(IC1102)
& Recheck
Y
Check CVBS Signal
C137
N
Replace one of 
R1190/Q1110/R195/C137
& Recheck
Y
N
Y
Check Tuner Power
(5.0V, 2.5V, 3.3V, 1.2V)
Replace one of 
L1111/L1101/L1102/L1103/L1104
& Recheck
Maybe Tuner(TU1100) has 
problems
Maybe BCM3556(IC100)
has problems
5. Component Video Trouble Shooting
MPEG_TS
DDR2
256MB
DDR2
256MB
BCM3556
(400M MIPS)
BCM3556
(400M MIPS)
1080P
LVDS
(Front-end)
(External Input)
EXT_IN
HDMI0_BCM
CVBS_LIVE
TP1
CVBS1/
SIF1
Ca
ble
ISDB-T/
PAL/NTSC
(System + DVR + Scalar)
(Analog DVR)
CVBS2/
SIF2
ISDB-T/
PAL/NTSC
Serial
TP1
Serial
TP2
I2S_BCM
NTP3100L
NTP3100L
CVBS1
CVBS2
CVBS_LIVE
CVBS/Y_DVR
COMP1_LR
COMP2_LR
RGB_LR
2069_L/R_OUT1
CXA2069
CXA2069
2069_L/R_OUT2
EXT_IN
HDMI0_BCM
AV1
AV2
NANDFlash
128MB
NANDFlash
128MB
(Etc)
SW
SW
SIF2
SIF1
SPI BUS
USB2.0
SPDIF
SIF_DVR
SIF_LIVE
SIF_LIVE
2069_L/R_OUT1
TP2
I2S_BCM
SPIF225A
SPIF225A
HDD
HDD
CVBS/Y_DVR
SIF_DVR
2069_L/R_OUT2
SAA7164
SAA7164
MPEG_TS
DDR1
256Mb
DDR1
256Mb
Flash
256KB
Flash
256KB
CPLD
CPLD
Parallel TS
Serial
I2C
MSPI
TDA9996
TDA9996
(Comp1/2, RGB)
TU_CVBS_DVR
TU_CVBS_DVR
HDMI4
HDMI2
HDMI1
SIDE HDMI_PORT4
UI_HW_PORT1
UI_HW_PORT2
RMX
BCM_SPI_CSb/
BCM_SPI_MISO
TP REMUX PORT
BCM_SPI_MOSI/
BCM_SPI_SCK
MNT_VOUT_DVR
MNT_VOUT_DVR
MONITOR_LR+/-_OUT
AMP
AMP
MNT_LOUT
MNT_ROUT
MNT_L/ROUT
Not Stuffed
5. Component Video Trouble Shooting
Check Signal Format
Is it supported signal?
Y
Check Component Jack JK700
N
Y
Check Component Signal
R774, R775, R776
R777, R778, R779
N
Replace one of 
R774/R775/R776/L700/L701/L702
R777/R778/R779/L703/L704/L705
& Recheck
Y
Check Component Signal
C127, C128, C129
C130, C131. C132
N
Replace it
Y
Y
Check Component Cable
Replace Jack
Maybe BCM3556(IC100)
has problems
6. RGB Video Trouble Shooting
MPEG_TS
DDR2
256MB
DDR2
256MB
BCM3556
(400M MIPS)
BCM3556
(400M MIPS)
1080P
LVDS
(Front-end)
(External Input)
EXT_IN
HDMI0_BCM
CVBS_LIVE
TP1
CVBS1/
SIF1
Ca
ble
ISDB-T/
PAL/NTSC
(System + DVR + Scalar)
(Analog DVR)
CVBS2/
SIF2
ISDB-T/
PAL/NTSC
Serial
TP1
Serial
TP2
I2S_BCM
NTP3100L
NTP3100L
CVBS1
CVBS2
CVBS_LIVE
CVBS/Y_DVR
COMP1_LR
COMP2_LR
RGB_LR
2069_L/R_OUT1
CXA2069
CXA2069
2069_L/R_OUT2
EXT_IN
HDMI0_BCM
AV1
AV2
NANDFlash
128MB
NANDFlash
128MB
(Etc)
SW
SW
SIF2
SIF1
SPI BUS
USB2.0
SPDIF
SIF_DVR
SIF_LIVE
SIF_LIVE
2069_L/R_OUT1
TP2
I2S_BCM
SPIF225A
SPIF225A
HDD
HDD
CVBS/Y_DVR
SIF_DVR
2069_L/R_OUT2
SAA7164
SAA7164
MPEG_TS
DDR1
256Mb
DDR1
256Mb
Flash
256KB
Flash
256KB
CPLD
CPLD
Parallel TS
Serial
I2C
MSPI
TDA9996
TDA9996
(Comp1/2, RGB)
TU_CVBS_DVR
TU_CVBS_DVR
HDMI4
HDMI2
HDMI1
SIDE HDMI_PORT4
UI_HW_PORT1
UI_HW_PORT2
RMX
BCM_SPI_CSb/
BCM_SPI_MISO
TP REMUX PORT
BCM_SPI_MOSI/
BCM_SPI_SCK
MNT_VOUT_DVR
MNT_VOUT_DVR
MONITOR_LR+/-_OUT
AMP
AMP
MNT_LOUT
MNT_ROUT
MNT_L/ROUT
Not Stuffed
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