Control Board - LG 42PG20 Training Manual

CIRCUIT DeSCRIPTIONS

CONTROL BOARD

4
2
P
G
2
Control board Inputs
0
Board Input
Main LVDS
Y-Sus 5V VCC
1.8V
Developed
3.3V
CONTROl bOARD TEST
For a quick board test. (All board connectors Disconnected). Jump 5V from Power Supply
to IC121 Pin 1. If the Temp LED lights, Pretty much guaranteed, board is OK. When the
Television has a problem related to; Shutdown caused by Main board No Picture. This
can be checked by disconnecting the Main board from all connectors. Apply AC power.
Since P813 is not connected, the set will come on. Short the two pins on the Auto Test
Pattern lands.
44
PDP Training - Fall 2008
IC121
P160
To Y/Z-Sus
IC122
P131
Download
P164
Connection
n/c
P121
IC212
IC201
MCM
IC213
Auto Gen
Test Pattern
P161
To X-Drive Left
Crystal
Temperature
LEDs
IC101
IC133
VS_DA
IC211 3V ~3.3V
IC171
IC171
Pin1 = 3.29V
Pin2 = 1.20V
Pin3 = 0V
P162
To X-Drive Right