LG 50PH4700-TD (CHASSIS:PA32A) Service Manual ▷ View online
12. HDMI Audio Trouble Shooting
ATSC
SYSTEM
A:DDR3x16_512 X 2
B:DDR3x16_256 X1
= 1.25GB
IF
X-TAL
ATSC
H/NIM
(W/o AD)
H/NIM
(W/o AD)
IF
eMMC
(4GB)
Commercial only
PH6700 only
ATSC only
F/Nim
Silicon Tuner
USB2
MTK A2
USB1
USB2
USB2
IF
USB1
NVRAM
(256KB)
(27MHz)
y
(TU option)
Silicon Tuner
Demodulator
Cable
SIF
SIF
SBTVD / DVB
(TU option)
USB3
LVDS
HDMI1
HDMI2
HDMI RX
HD : 51P
FHD : 80P
USB3
Wi-Fi
USB0
Audio
AMP
I2S Out
HDMI3
RGB,H/V
With EEPROM
With EEPROM
FHD : 80P
PC-RGB
MHL Bridge
SIL1292
SIL1292
L/R In
CVBS
AV / COMP
HYBRID
PC-AUDIO
COMP
With EEPROM
I2C
Sub Micom
(Renesas)
X-TAL
(32.768kHz)
SPDIF OUT
RS-232C
OPTIC
UART
RF Emitter
Module
CVBS/COMP _LR
COMP/ _LR
LAN
Ethernet
12. HDMI Audio Trouble Shooting
Check video output
Y
N
Follow procedure HDMI video
trouble shooting
trouble shooting
N
Ch k DDC Li
Replace one R3302, R3303, R3312,
R3313 R3320 R3321
R3313 R3320 R3321
Check EDID Pull-Up Voltage
N
Replace one R3330, R3374, R3315,
R3316, R3311, R3314
R3316, R3311, R3314
Check DDC Line
R3313, R3320, R3321
& Recheck
& Recheck
Y
Follow procedure All source audio
trouble shooting
trouble shooting
N
Y
p
g
Maybe LGE2122 (MTK Main IC,
IC105) audio block has problems.
Replace it
IC105) audio block has problems.
Replace it
,
,
& Recheck
SYSTEM
A:DDR3x16 512 X 2
Commercial only
13. USB Trouble Shooting
A:DDR3x16_512 X 2
B:DDR3x16_256 X1
= 1.25GB
X-TAL
(27MHz)
eMMC
(4GB)
Commercial only
F/Nim
Silicon Tuner
Serial TS
Demodulator
Cable
Serial TS
PH6700 only
USB2
MTK A2
USB1
USB2
USB3
USB2
USB3
USB1
NVRAM
(256KB)
USB0
CVBS
CVBS
LVDS
HD : 51P
FHD : 80P
USB3
Wi-Fi
HDMI1
HDMI2
HDMI3
HDMI RX
MHL Bridge
SIL1292
SIL1292
Audio
AMP
I2S Out
RGB,H/V
With EEPROM
With EEPROM
PC-RGB
HDMI3
SIL1292
L/R In
CVBS
AV / COMP
HYBRID
PC-AUDIO
COMP
I2C
Sub Micom
(Renesas)
X-TAL
(32.768kHz)
CVBS/COMP _LR
COMP/ LR
SPDIF OUT
RS-232C
OPTIC
Eth
t
UART
RF Emitter
Module
COMP/ _LR
LAN
Ethernet
13. USB Trouble Shooting
Check USB 2.0 Cable
Y
Check USB device
If device is 2.5 inch HDD,
If device is 2.5 inch HDD,
Y
,
Check power adaptor
Check 5V voltage level at
analog switch(IC4304,
IC4305,IC4306)
analog switch(IC4304,
IC4305,IC4306)
N
Replace one of
switch(IC4304, IC4305,IC4306 &
Recheck
switch(IC4304, IC4305,IC4306 &
Recheck
Y
Maybe Main Chip (IC105)
has problems. Replace It.
has problems. Replace It.
• 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)
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