Service Modes, Error Codes, and Fault Finding
EN 19
LGE PDP 2K6
5.
5.2.2
Display Defects
Half of the Screen is Not Shown
•
On the XR board:
1.
Check if the power connector of the XR board is
plugged in correctly.
2.
Check if the 60-pin connection of the CTRL board to
the XR board is plugged in correctly.
•
On the XL board:
1.
Check if the power connector of the XL board is
plugged in correctly.
2.
Check if the 60-pin connection of the CTRL board to
the XL board is plugged in correctly.
•
Replace relevant X board.
Notes:
Relationship between Screen and X board:
Figure 5-24 Screen display “1/2 display”
Vertical Parts of the Screen are Missing
1.
This can be related to a problem between the Data TCP
and the X board.
2.
Verify that the connector of the Data TCP is well connected
to the X board (it corresponds to the part of the screen that
does not display the image).
3.
Confirm whether the Data TCP fails (examination with the
naked eye of blown ICs or other parts included).
–
If an IC is damaged: replace the panel.
–
In case of an X board short circuit or an open PWB
pattern: when the TCP IC is not defective, replace the
X board.
Notes:
•
Example of screen display (any of the Data TCPs can be
shown).
Figure 5-25 Screen display “Vertical parts missing”
•
How to examine the Data TCP IC
–
Connect [1] "Va Power" to the minus and [2] "GND" to
the plus of an ohmmeter, and then examine the diode
in forward or reverse direction.
–
Examine with the naked eye traces of blown ICs [3] or
other parts.
Figure 5-26 Data TCP IC examination
Unusual Pattern on Display
1.
In case of generation of an unusual pattern of the Data TCP
IC unit as shown in the picture below, check the fixation of
the relevant X board. If that doesn’t help, replace the X
board.
2.
In case of "Case 1":
–
Check the connection between the Data TCP
connector and the IC.
–
Replace the relevant X board, or the Control board.
3.
In case of "Case 2" or "Case 3":
–
Check the connection between the CTRL board and
the relevant X board.
–
Replace the relevant X board or the CTRL board.
Note:
•
If the silicon tape between the X board and the heatsink
feels (partially) hard, it has to be replaced.
Figure 5-27 Possible cases
Scan FPC Problem
1.
Check the connection between Y DRV board and Scan
FPC.
2.
If the Scan IC is defective, replace the Y DRV board.
Screen
X-board
Left half of the screen
Right X-board
Right half of the screen
Left X-board
No im
a
ge
Im
a
ge
Left half of the screen
Right half of the screen
G_16
3
90_044.ep
s
110
8
06
F_15590_009.eps
040705
All
Partial
Not at all
G_16
3
90_0
8
1.ep
s
010906
G_16
3
90_045.ep
s
140
8
06
Case 1
Case 2
Case 3
