Service Modes, Error Codes, and Fault Finding
EN 13
LGE PDP
5.
Control Board
The Control board supplies the video signal to the TCP. So, if
there is a bar defect on screen, it may be a Control board
problem.
Figure 5-18 Control board address flow
5.1.3
Line Defect (Vertical)
In case of one line open or shorted, check dirt (foreign
substances) in TCP connector. First, try to remove the dirt with
compressed air. If, after this, the same line appears again,
replace the panel.
Line Open or Short
This phenomenon is due to TCP IC inside short or electrode
problem. In this case, replace the panel.
Figure 5-19 Single line defect
Line Open or Short with the Same Distance
This is MCM of Control board defect. The MCM cannot be
replaced separately. So replace the Control board.
Figure 5-20 Evenly repeated lines
5.1.4
Bar Defect (Horizontal)
Most horizontal defects can be repaired. In case of adherence
part of the film and rear panel electrode, or panel electrode
open/short, replace the PDP panel.
Connector
If the connector on Y board and Z board are not plugged in well,
it can result in a horizontal bar, because the sustain voltage
Cannot be supplied to panel. So check connectors FPC and
Ydrv-Ydrv first.
Figure 5-21 Check FPC connectors
F_15590_082.eps
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Buffer
IC
MCM
TCP
6 line
Array
Resistor
192 Line output
1 line open
1 electrode open
F_15590_083.eps
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MCM of CTRL board defect.
MCM can not be replaced separately.
So replace the CTRL board.
MCM (Multi Chip Module)
F_15590_084.eps
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Horizontal bar
Disconnected
F_15590_085.eps
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