LG 50PG20 Troubleshooting Manual page 6

Module Control Trouble Shooting
Check P302 SCL,SDA line SCL,SDA
line R330, R334
Y
Check the IIC To II C Test
- Debug Menu IIC Test
Y
Check the PDP Module Control
Board
SCL
SDA
Start
By
Master
SCL (continue)
SDA (continue)
Master : Image Board
Slave : PDP Module
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Only for training and service purposes
TROUBLE SHOOTING GUIDE
N
N
N
1
0 0 0
1 1
Chip ID Address Byte
(0x1C)
9
ACK
By Slave
Check Signal
Remove R330, R334
Check each IC sharing
IIC channel
Replace Module Control Board
9
0 W
1
Write
ACK
only
By Slave
1
D7 D6
Command Data
for Addr
- 16 -
1
A7 A6
Command Address
Addr=A[7:0]
9
D0
ACK Stop
By Slave By Master
8
A1 A0
LGE Internal Use Only