LG 50PG30F-UA (CHASSIS:PU84C) Service Manual ▷ View online
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TROUBLE SHOOTING GUIDE
Module Control Trouble Shooting
Check the PDP Module Control
Board
Replace Module Control Board
N
Y
Check the IIC To II C Test
- Debug Menu IIC Test
Remove R330, R334
Check each IC sharing
IIC channel
N
Check P302 SCL,SDA line SCL,SDA
line R330, R334
Check Signal
N
Y
SCL (continue)
SDA (continue)
ACK
By Slave
9
1
D0
D7
9
ACK
By Slave
Command Data
for Addr
Stop
By Master
D6
SCL
8
SDA
0
0
1
1
1
A7
W
Start
By
Master
Chip ID Address Byte
(0x1C)
ACK
By Slave
0
1
9
1
A6
A1
A0
Command Address
Addr=A[7:0]
0
Write
only
Master : Image Board
Slave : PDP Module
Slave : PDP Module
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TROUBLE SHOOTING GUIDE
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TROUBLE SHOOTING GUIDE
Digital TV Video Trouble Shooting
Check RF Cable
Check TP Clock, Data, Sync
R440, R441, R442
Maybe Tuner(TU400) has problems
Check Mstar LVDS output
#33(TXAC-) , #32(TXAC+) ,
#17(TXBC-) , #16(TXBC+)
Y
N
Check Tuner 5V Power
IC703 #5 Pin
Replace IC703
Y
N
Y
Maybe Mstar(IC100) has problems
N
Y
Check LD400 color
Bad Tuner. Replace Tuner.
None
Yellow --> none
Check Demodulator Input Clock
X400 (25MHz)
Replace it
N
Y
Check PDP Module
Control board
Refer to Module CAS
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TROUBLE SHOOTING GUIDE
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