LG 42LH40ED / 42LH45ED (CHASSIS:LJ92J) Service Manual ▷ View online
Check RF Cable
Y
Check CVBS Signal
TU1100 #7 Pin
N
Y
Check CVBS Signal
CXA2069(IC1102) #30 Pin
N
Replace one of
C1159/R1161/C1149
& 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
Y
Maybe Tuner(TU1101) has
problems
Maybe BCM3556(IC100)
has problems
20. Analog TV Video Trouble Shooting while recording (Watch & Record)
Check Tuner(TU1101) Power
(5.0V, 2.5V, 3.3V, 1.2V)
N
Replace one of
L1106/L1105/L1107/L1109
& Recheck
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
SIF1
Ca
ble
ISDB-T/
PAL/NTSC
(System + DVR + Scalar)
(Analog DVR)
CVBS2/
SIF2
SIF2
ISDB-T/
PAL/NTSC
Serial
TP1
TP1
Serial
TP2
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
BCM_SPI_SCK
MNT_VOUT_DVR
MNT_VOUT_DVR
MONITOR_LR+/-_OUT
AMP
AMP
MNT_LOUT
MNT_ROUT
MNT_L/ROUT
Not Stuffed
21. Analog TV Audio Trouble Shooting while recording (Watch & Record)
Follow procedure analog TV video
trouble shooting while recording
N
Check video output
Y
Check SIF Signal
TU1100 #6 Pin
N
Y
N
Y
Check SIF Signal
C141
N
Replace one of R113/C141
& Recheck
Y
Follow procedure All source audio
trouble shooting
N
Maybe BCM3556 audio block has
problems. Replace It
Y
Maybe Tuner(TU1100) has
problems
Replace one of
L512/L514/C550/C553/Q504/Q506
Q508/IC501 & Recheck
Check SIF Signal
IC501 #4 Pin
21. Analog TV Audio Trouble Shooting while recording (Watch & Record)
Check Tuner(TU1101) Power
(5.0V, 2.5V, 3.3V, 1.2V)
N
Replace one of
L1106/L1105/L1107/L1109
& Recheck
- 59 -
300
200
801
200T
120
121
122
500
330
510
805
804
803
802
806
550
900
530
540
400
521
A2
A10
LV1
EXPLODED VIEW
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
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