LG 50PZ750-UG (CHASSIS:PU12A) Service Manual ▷ View online
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HDMI Video Trouble Shooting
Check input signal format
Is it supported?
Y
Check JK701~JK703 for proper
connection or damage
Replace connector
Y
N
Y
Check HDMI Cable for damage or open
conductors
Check EDID
SVC REMOTCONTROL
Check HDMI SW(IC700)
Power(R522) & I2C Signal(R752/3)
EDID D/L
Y
N
Replace IC700
Y
N
Replace BCM35230(IC101)
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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
All Source Audio Trouble Shooting
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All Source Audio Trouble Shooting
Make sure you can’t hear any audio
Check Signal (PWM)
L1600~L1603
Replace L1600~L1603
Y
N
Check Power
17V(L1604), 3.3V(L1605)
Replace 17V(L1604), 3.3V(L1605)
Y
N
Check Connector
P1600
Check BCM I2S Output
R1605~R1608
Y
Replace IC501.
N
Check speaker for damage.
Y
Check IC16000 Status
/PDN(#23), /Reset(#30) is High?
Replace IC1600
N
Replace P1600
N
Replace the Speaker
N
Y
Y
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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 Audio Trouble Shooting
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