LG 50PT250B-SG (CHASSIS:PB12K) Service Manual ▷ View online
7. AV Video Trouble Shooting
Y
Check Jack JK1000/JK1002
N
Y
Check CVBS Signal
R1003/R1044
N
Y
Check CVBS Signal
R187/R188/C226/C227
N
Replace one of
R187/R188/C226/C227
& Recheck
Y
Y
Replace Jack
Maybe Mstar S7LR(IC101)
has problems
Check Signal Format
Is it supported signal?
Check AV Cable
Replace one of
R1003/R1044
& Recheck
(Front-end)
(External Input)
(System + Scalar)
I2S_S7LR
STA368
STA368
AV1
AV1_LR
COMP1_LR
COMP2_LR
RGB_LR EXT_IN
AV2
AV2_LR
(Audio Out)
(Comp1/2, RGB)
(USB)
8. HDMI Video Trouble Shooting
REAR HDMI_PORT
SIDE HDMI_PORT
REAR HDMI_PORT
HDMI 1
HDMI 2
HDMI 3
Side USB
DDR3
256MB(128*2)
DDR3
256MB(128*2)
S7LR
S7LR
HD
LVDS
NANDFlash
128MB
NANDFlash
128MB
SPDIF
I2S_S7LR
Serial_Flash
1MB
Serial_Flash
1MB
EXT_IN
HDMI 1
CVBS
TP
SIF
HDMI 2
HDMI 3
USB2.0
Side USB
CVBS
SIF
SIF
Cab
le
ISDB-T/
PAL/NTSC
IF
Demodulator
MN884433
TP
8. HDMI Video Trouble Shooting
Check Signal Format
Is it supported signal?
Y
Check HDMI Jack
JK801, JK803, JK804
N
Y
Y
Check HDMI Cable
Replace Jack
Check I2C Signal
R829/R830
/R848/R849/R862/R863
N
Replace It & Recheck
Y
Maybe Mstar S7LR(IC101)
has problems
9. All Source Audio Trouble Shooting
(Front-end)
(External Input)
(System + Scalar)
I2S_S7LR
STA368
STA368
AV1
AV1_LR
COMP1_LR
COMP2_LR
RGB_LR EXT_IN
AV2
AV2_LR
(Audio Out)
(Comp1/2, RGB)
(USB)
REAR HDMI_PORT
SIDE HDMI_PORT
REAR HDMI_PORT
HDMI 1
HDMI 2
HDMI 3
Side USB
DDR3
256MB(128*2)
DDR3
256MB(128*2)
S7LR
S7LR
HD
LVDS
NANDFlash
128MB
NANDFlash
128MB
SPDIF
I2S_S7LR
Serial_Flash
1MB
Serial_Flash
1MB
EXT_IN
HDMI 1
CVBS
TP
SIF
HDMI 2
HDMI 3
USB2.0
Side USB
CVBS
SIF
SIF
Cab
le
ISDB-T/
PAL/NTSC
IF
Demodulator
MN884433
TP
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