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EN 20
5.
LGE PDP 2K5
Figure 5-49 Set_Up FET defective
Figure 5-50 Set_Down FET defective
Figure 5-51 Reset section normal output
SCAN IC (Y-DRV board: IC1-8)
1. In case of the SCAN IC is damaged, one horizontal line
may be open on the screen.
–
Test Point: ICT measurement of GND-Y DRV board
output.
–
Wave format: As shown below figure.
2. When the SCAN IC is damaged (poor, external electricity,
or spark), there might be no picture.
–
Test Point: ICT measurement of GND-Y DRV board
output
–
Wave format: Output wave format is not generated
(you can see if Y DRV board Top or Bottom's SCAN IC
is damaged).
3. Screen shaked horizontally when Y DRV board Top and
Bottom cable is damaged.
–
Test Point: ICT measurement of GND-Y DRV board
output.
–
Wave format: As shown in figure "Y DRV board Top
and Bottom cable damaged".
4. Overlap of two horizontal lines on the screen in case of
shorted SCAN IC output.
Service Modes, Error Codes, and Fault Finding
Set_up waveform
does not come out
F_15590_026.eps
060605
Set_down waveform
does not come out
F_15590_027.eps
060605
H_15593_004.eps
120707
–
Test Point: ICT measurement of GND-Y DRV board
output.
–
Wave format: As shown in figures "SCAN IC shorted
output" and "SCAN IC normal output".
–
Measurement point: SCAN section, output ICT of Y
DRV board (full white pattern).
' ' '
Figure 5-52 SCAN IC defective
Figure 5-53 Y DRV board Top and Bottom cable damaged
115V
Figure 5-54 SCAN IC shorted output
F_15590_029.eps
060605
F_15590_030.eps
060605
7us
7us
60V
F_15590_031.eps
040705
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