LG 50PZ750-UG (CHASSIS:PU12A) Service Manual ▷ View online
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Module Control Trouble Shooting
“TILT” on Adjust Remocon
: PDP internal pattern displays?
PDP Module Power is OK?
N
PDP Module is OK.
Check P902 SCL,SDA line SCL,SDA
line R3230, R3202
Check Signal
: X3200 output
N
Y
< Sample Signal on R2717, R2703 >
SCL
SDA
ACK
signal Check
Low :
OK
High :
Error
Replace X3200
N
Check SMPS & cable
N
Y
Replace PDP Module
13/39
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14/39
AV1,2 L/R
COMP 1,2 L/R
Side HDMI 1/2/3/4
CVBS waveform
IF waveform
STA368
(Digital AMP)
Reset
I2S
LGE35230
MCLK
HDMI CEC
IR
CVBS
Buffer
SIF
Buffer
RS-232C
I2C
CVBS(ATV)
NTSC/ATSC
TUNER
X-tal
(54MHz)
NAND Flash
(8GB)
DDR3 (2GB)
TDVJ-H101F
24C16
24C16
Local
Local
KEY
KEY
MAIN IF
DP/DM
DP/DM
NEC
NEC
Micom
Micom
COMP1
COMP2
Y/Cb/Cr
Y/Cb/Cr
R/G/B
RGB-PC
Rear AV
CVBS
Side AV
CVBS
L/R
L/R
RGB-PC
Audio In
SIF
Audio
Front
End
Video
Front
End
TMDS/DDC
HDMI
RX
I2C
HD/SD
Video
Encoder
Audio
DSP
SPDIF Out
UART
RX/TX
UART
UART
USB 2.0
RMII
RMII
DDC
SIF
SII9287B
HDMI SW
LAN
LAN
3DF_ASIC
LG8300
3DF_ASIC
LG8300
DDR2
(256Mbit)
X-tal
(25MHz)
Serial_Flash
(2Mbit)
LVDS 2Ch
Left (2D):
1920x1080/60Hz
LVDS
(
8
0
Pin
)
LVDS 2Ch
Right(2D) :
1920x1080/60Hz
Digital TV Video Trouble Shooting
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Digital TV Video Trouble Shooting
Check RF Cable
Y
Check Tuner 5V,7V Power
IC500(7V),IC506(5V)
Replace IC500 or IC506
Y
N
Y
Check IF_P,IF_N (TU2103)
R17, P18
Maybe Tuner has problems
: Replace Tuner
Y
Check PDP Module
Control board
Refer to Module CAS
15/39
N
N
Check IC
#62(TXAC1-) , #61(TXAC1+) ,
#46(TXAC2-) , #45(TXAC2+),
#30(TXAC3-) ,#29(TXAC3+)
,#14(TXB4-) , #13(TXBC4+)
#62(TXAC1-) , #61(TXAC1+) ,
#46(TXAC2-) , #45(TXAC2+),
#30(TXAC3-) ,#29(TXAC3+)
,#14(TXB4-) , #13(TXBC4+)
Maybe BCM has problems
Replace IC3202
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16/39
AV1,2 L/R
COMP 1,2 L/R
Side HDMI 1/2/3/4
CVBS waveform
IF waveform
STA368
(Digital AMP)
Reset
I2S
LGE35230
MCLK
HDMI CEC
IR
CVBS
Buffer
SIF
Buffer
RS-232C
I2C
CVBS(ATV)
NTSC/ATSC
TUNER
X-tal
(54MHz)
NAND Flash
(8GB)
DDR3 (2GB)
TDVJ-H101F
24C16
24C16
Local
Local
KEY
KEY
MAIN IF
DP/DM
DP/DM
NEC
NEC
Micom
Micom
COMP1
COMP2
Y/Cb/Cr
Y/Cb/Cr
R/G/B
RGB-PC
Rear AV
CVBS
Side AV
CVBS
L/R
L/R
RGB-PC
Audio In
SIF
Audio
Front
End
Video
Front
End
TMDS/DDC
HDMI
RX
I2C
HD/SD
Video
Encoder
Audio
DSP
SPDIF Out
UART
RX/TX
UART
UART
USB 2.0
RMII
RMII
DDC
SIF
SII9287B
HDMI SW
LAN
LAN
3DF_ASIC
LG8300
3DF_ASIC
LG8300
DDR2
(256Mbit)
X-tal
(25MHz)
Serial_Flash
(2Mbit)
LVDS 2Ch
Left (2D):
1920x1080/60Hz
LVDS
(
8
0
Pin
)
LVDS 2Ch
Right(2D) :
1920x1080/60Hz
Analog TV Video Trouble Shooting
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