LG 50PH4700-DD (CHASSIS:PB32A) Service Manual ▷ View online
SYSTEM
A:DDR3x16 512 X 2
Commercial only
8. HDMI Video 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
Audio
AMP
I2S Out
RGB,H/V
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
8. HDMI Video Trouble Shooting
Check Signal Format
Is it supported signal?
Y
Check HDMI Cable
Y
N
Check EDID D/L
Re-Download EDID
Check HDMI Jack
JK3301, JK3302, JK3303
N
Y
Replace Jack
Y
Maybe LGE2122 (IC105)
has problems
9. All Source 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)
IF(ATV/DTV)
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
Parallel TS
SIF(ATV)
Parallel TS(DTV)
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
FHD : 80P
PC-RGB
MHL Bridge
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
9. All Source Audio Trouble Shooting
Make sure you can’t hear
any audio
Y
Check Speaker
N
di ?
Replace Speaker
N
Check Connector P3801
No audio?
N
Y
No audio?
Replace Connector
p
p
Replace one of Resistor /
Capacitor & Recheck signal
Y
Check Signal at Coil
L3802, L3803, L3804,
L3805
Is there any pulse signal?
N
Replace one of Coil
L3802, L3803, L3804,
L3805
& Recheck signal Î ok?
Check IC3801 Power
OK
(17V : C3821,
3.3V : C3805)
3.3V : C3805)
Follow Power UP_Boot Fail
trouble shooting guide
N
Capacitor & Recheck signal
Î ok?
Resistor : R3810, R3811,
R3812, R3813
Capacitor : C3810, C3811,
C3814, C3815
C3817 ~ C3825
N
Y
N
Y
C3817 C3825
Replace It & Recheck
Y
Y
Y
Check Main IC I2C / I2S
signal out put with user
menu volume up/down test
N
Maybe MTK IC LGE2122 (IC105)
has problems
Replace it
Maybe Audio Digital AMP has
problems. (IC3801, STA380BWF)
Replace It
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