LG 50PM4700-DA (CHASSIS:PB22A) Service Manual ▷ View online
SPDIF OUT
USB0
Audio
AMP
I2S Out
MTK5369
USB2
USB1
USB1
RS-232C
PC-RGB
OPTIC
LAN
SYSTEM
DDR3x16_2Gb X 4
(8Gb)
LVDS
HDMI1
HDMI2
HDMI3
HDMI4
HDMI4
RGB,H/V
With EEPROM
Ethernet
CVBS
UART
HDMI
With
EEPROM
RF Emitter
Module(Bluetooth)
I2C
Sub
Micom
(Renesas
)
Parallel TS
HD : 51P
FHD : 80P
USB2
USB1
NVRAM
(1Mb)
X-TAL
(27MHz)
HDCP2.0
Wi-Fi
CVBS
F/Nim
Silicon Tuner
F/Nim
Silicon Tuner
Parallel TS
X-TAL
(32.768kHz)
eMMC
(2GB)
Demodulator
Cable
CVBS1/2 _LR
COMP1/2 _LR
CVBS/COMP2 _LR
COMP1_LR
13. HDMI Audio Trouble Shooting
CVBS
CVBS/COMP2
COMP
RGB_LR
COMP1
COMP
PC-AUDIO
Check video output
Y
Follow procedure All source audio
trouble shooting
N
Y
Check EDID Pull-Up Voltage
Maybe BCM2112audio block has
problems. Replace it
N
Follow procedure HDMI video
trouble shooting
N
Replace one
R604/R606/R618/R620/R619/R621/R
605/R607
& Recheck
N
Check DDC Line
Replace one
R614/R615/R616/R617/R627/R629/
R632/R633/R634/R635
& Recheck
Y
13. HDMI Audio Trouble Shooting
SPDIF OUT
USB0
Audio
AMP
I2S Out
MTK5369
USB2
USB1
USB1
RS-232C
PC-RGB
OPTIC
LAN
SYSTEM
DDR3x16_2Gb X 4
(8Gb)
LVDS
HDMI1
HDMI2
HDMI3
HDMI4
HDMI4
RGB,H/V
With EEPROM
Ethernet
CVBS
UART
HDMI
With
EEPROM
RF Emitter
Module(Bluetooth)
I2C
Sub
Micom
(Renesas
)
Parallel TS
HD : 51P
FHD : 80P
USB2
USB1
NVRAM
(1Mb)
X-TAL
(27MHz)
HDCP2.0
Wi-Fi
CVBS
F/Nim
Silicon Tuner
F/Nim
Silicon Tuner
Parallel TS
X-TAL
(32.768kHz)
eMMC
(2GB)
Demodulator
Cable
CVBS1/2 _LR
COMP1/2 _LR
CVBS/COMP2 _LR
COMP1_LR
14. USB Trouble Shooting
CVBS
CVBS/COMP2
COMP
RGB_LR
COMP1
COMP
PC-AUDIO
• Exception
- USB power could be disabled by inrushing current
- In this case, remove the device and try to reboot the TV (AC power off/on)
- In this case, remove the device and try to reboot the TV (AC power off/on)
Check USB 2.0 Cable
Y
Y
Check USB device
If device is 2.5 inch HDD,
Check power adaptor
Check 5V voltage level at
analog switch(IC600, IC601,IC603)
N
Replace one of
IC600, IC601,IC603 & Recheck
Y
Maybe BCM2112 (IC100)
has problems. Replace It.
14. USB Trouble Shooting
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