LG 50PX950-UA / 50PX950-UF (CHASSIS:PU02B) Service Manual ▷ View online
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No OSD Trouble Shooting
Check P902
#33(TXAC-) , #32(TXAC+) ,
#17(TXBC-) , #16(TXBC+)
Maybe BCM has problems
Replace IC501
Check LVDS Cable for damage or
open conductors
.
Check PDP Module
Control board
Refer to Module CAS
Y
N
Y
Replace Cable
N
Y
Check SMPS Vs,Va, 5V,17V
Replace Power Board
N
Check P400
5V_ON
Check GPIO Path of IC701
N
Y
Electrical Specifications
Power Supply Sequence
Input Signal Timing Specification
Control Signal Register
Power Supply Sequence
Input Signal Timing Specification
Control Signal Register
Check CAS
It should satisfy the
Pixel Clock
on CAS.
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No OSD Trouble Shooting (Module Power Sequence)
< 60R1 >
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Module Control Trouble Shooting
“TILT” on Adjust Remocon
: PDP internal pattern displays?
PDP Module Power is OK?
N
PDP Module is OK.
Check P902 SCL,SDA line SCL,SDA
line R953, R955
Check Signal
: X900 output
N
Y
< Sample Signal on R2717, R2703 >
SCL
SDA
ACK
signal Check
Low :
OK
High :
Error
Replace X900
N
Check SMPS & cable
N
Y
Replace PDP Module
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Digital TV Video Trouble Shooting
CVBS waveform
IF waveform
TAS5709
(Digital AMP)
Reset
I2S
BCM3549XS
MCLK
HDMI CEC
IR
CVBS
Buffer
SIF
Buffer
RS-232C
I2C
CVBS(ATV)
NTSC/ATSC
TUNER
X-tal
(54MHz)
NAND Flash
(2GB)
DDR2 (512MB)
TDVJ-H001F
KIA7427AF
KIA7427AF
24C16
24C16
Local
Local
KEY
KEY
MAIN IF
DP/DM
DP/DM
NEC
NEC
Micom
Micom
COMP1
COMP2
Y/Cb/Cr
Y/Cb/Cr
R/G/B
RGB-PC
Rear AV
CVBS
Side AV
CVBS
AV1,2 L/R
COMP 1,2 L/R
L/R
L/R
RGB-PC
Audio In
Rear HDMI 1/2/3
Side HDMI 1
SIF
Audio
Front
End
Video
Front
End
TMDS/DDC
HDMI
RX
HD/SD
Video
Encoder
Audio
DSP
SPDIF Out
UART
RX/TX
UART
UART
USB 2.0
RMII
RMII
24C01
DDC
SIF
TDA19997
TDA19997
HDMI SW
LAN
LAN
Digital out
Full HD(1080P)
IR Emitter
3D_
S
YNC
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