Prima PH-42FB7, Service Manual, Page: 5 / 64

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become a potential safety trouble.
1.22 In addition to plasma screen, the glass is a part of high value. It has such functions as
anti-radiation, adjustment of color temperature etc. Please handle it carefully.
2. “Criterion for Identifying the Defects on Screen”
The PDP produced by our Company at present uses the following criterion for identifying the defective
points:
2.1 Model PS-42XX:
There may appear three kinds of defective points for this model as shown in Fig.1, i.e., bright spot
(remain bright); dark spot (non-illuminating); flickering spot (continuously flickering).
However they should not exceed the specification as in table 1. Otherwise the product shall be deemed
as sub-standard.
Figure 1 Defective Points
Table 1 Criterion for Three Kinds of Defective Points
Kind Area A Area B Remark
Dark spots No more than 2 No more than 8
Bright spot No more than 1 No more than 2
Flickering spot No more than 1 No more than 2
Total number of defective
points in A and B shall not
exceed 8. The distance
between two defective
points shall not be shorter
than 15mm.
2.2 Model PH-42XX:
Zone B
Zone A
H
W/4 W/2 W/4
H/2
H/4
H/4
W