LG 42PQ20 Training Manual page 86

Control PWB Signal Block
Control PWB Signal Block
The Control Board supplies Video Signals to the TCP (Tape Carrier Package) ICs.
If there is a bar defect on the screen, it could be a Control Board problem.
Control Board to X Board
Address Signal Flow
This Picture shows Signal Flow Distribution to help determine the
failure depending on where the it shows on the screen.
EEPROM
MCM
DRAM
IC201
To X-Drive Boards
Basic Diagram of Control Board
IC201
MCM
Resistor Array
16 line
2 Buffer
Outputs
per TCP
128 Lines per Buffer
256 Lines output Total
January 2009 Plasma
86
CONTROL PWB
X-DRIVE PWB
PANEL
42PQ20