Philips 231B4LPYCB/75 Service Manual page 16

16 Meridian 4
Black dot defects appear as pixels or sub pixels that
are always dark or 'off'. That is, a dark dot is a sub-
pixel that stands out on the screen when the monitor
displays a light pattern. There are two types of black
dot defects:
Bright Dot Defects
MODEL
1 lit subpixel
2 adjacent lit subpixels
3 adjacent lit subpixels (one white pixel)
Distance between two bright dot defects*
Total bright dot defects of all types
Black Dot Defects
MODEL
1 dark subpixel
2 adjacent dark subpixels
3 adjacent dark subpixels
Distance between two black dot defects*
Total black dot defects of all types
Total Dot Defects
MODEL
Total bright or black dot defects of all types
Note:
1 or 2 adjacent sub pixel defects = 1 dot defect.
This monitor is ISO9241-307 compliant.
Proximity of Pixel Defects
Because pixel and sub pixels defects of the same type
that are near to one another may be more noticeable,
Philips also specifies tolerances for the proximity of
pixel defects.
Pixel Defect Tolerances
In order to qualify for repair or replacement due to
pixel defects during the warranty period, a TFT
Monitor panel in a Philips flat panel monitor must have
pixel or sub pixel defects exceeding the tolerances
listed in the
Acceptable level
231B4LPYCS/231B4LPYCB
Acceptable level
231B4LPYCS/231B4LPYCB
5 or fewer
2 or fewer
5 or fewer
Acceptable level
231B4LPYCS/231B4LPYCB
5 or fewer
following tables.
3
1
0
>15mm
3
0
>15mm