Philips 231P4UPEB/00, Service Manual

Page: 13 / 95

Meridian 4 13
Black Dot Defects
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:
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 following tables.