LG 50PZ950B-SA (CHASSIS:PB12A) Service Manual ▷ View online
Check RF Cable
Y
Check CVBS Signal
TU2102 #11 Pin
N
Y
Check CVBS Signal
C325
N
Replace one of
C328/R308/Q602/R621
& Recheck
Y
N
Y
Check Tuner Power
(5.0V, 3.3V, 1.2V)
Replace one of
L601/L600/L602
& Recheck
Maybe Tuner(TU2102) has problems
Maybe BCM35230 (IC101)
has problems
4. Analog TV Video Trouble Shooting
4. Analog TV Video Trouble Shooting
Pin #1
Pin #18
Checking order
1. Check Tuner power (Pin #3, #13, #14)
2. Check Tuner I2C level (Pin #6, #7)
3. Check Video signal (Pin #11)
< CVBS waveform – sample >
- Defend on the input signal.
- Defend on the input signal.
5. Component Video Trouble Shooting
DDR2
512MB
DDR2
512MB
BCM35230
BCM35230
1080P
LVDS
(Front-end)
(External Input/Output)
EXT_IN
HDMI
CVBS1,2
(System + Scalar)
BCM_I2S
Audio_AMP
STA368BWG
Audio_AMP
STA368BWG
CVBS1/LR
CVBS2/LR
CVBS2/LR
COMP1_LR
COMP2_LR
RGB_LR
EXT_IN
HDMI
NAND
8Gbit
NAND
8Gbit
Ethernet
(Etc)
USB2
SPDIF
SIF_LIVE
LR1,2
IF
BCM_I2S
USB1
COMP1/2
HDMI 1.3 x 4
RGB
4:
1
Swit
c
h
SII9287B
NEC Micom
uPD
NEC Micom
uPD
BCM_SPDIF
BCM_SPDIF
COMP_LR1,2
RGB_LR
LAN
(3DF_Block)
3D_Sync
M-R/RF Emitter
RF_Tx
M-R/RF Emitter
RF_Tx
L/R Indicator
GPIO77
LG8300_3DF_ASIC
LG8300_3DF_ASIC
1080P
1080P(L)
1080P(R)
DDR2
256Mb
DDR2
256Mb
Serial Flash
2Mbit
Serial Flash
2Mbit
3D_Sync
L/R Indicator
X-TAL
54MHz
X-TAL
54MHz
CEC Control
CVBS1/
SIF_LIVE
SIF_LIVE
ISDB-T
LGIT
TDTR-T036F
IF
CABLE
HDMI
Wireless
RX Box
M-Remote
Module
UART
Check Signal Format
Is it supported signal?
Y
Check Component Jack1100
N
Y
Check Component Signal
R1136/R1137/R1138/R1133/R1134/
R1135
N
Replace one of
R1136/R1137/R1138/R1133/R1134/
R1135
& Recheck
Y
Check Component Signal
C329/C330/C331/C332/C333/C334/C
335/C336
N
Replace it
Y
Y
Check Component Cable
Replace Jack
Maybe BCM35230 (IC101)
has problems
5. Component Video Trouble Shooting
Comp (Y)
Comp (Pb)
Comp (Pr)
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