NEC AccuSync LCD51VM Series Service Manual page 71

Note 6: Close each set of (6)
R R
≤ 6.5mm
Distance between each set of (6) must be more than 10mm.
Note 7: 2 or more defect dots (5) in 5×5 pixels.
When 2 or more defect dots (5) in 5×5 pixels, the set of the dot defects is counted as 1 cluster.
5×5 pixels
1 cluster
Note 8: 2 or more sets of (1) and (2) in 5×5 pixels.
5×5 pixels
R G
Adjacent 2 bright dots (1) ≤ 1 set
5×5 pixels
R G
R G
Adjacent 2 bright dots (1) ≥ 2 sets
R
>10mm
≤ 6.5mm
Defect dots (5)
It must be 2 or less than clusters in the whole screen.
Adjacent 2 dark dots (2) ≤ 1 set
Adjacent 2 dark dots (2) ≥ 2 sets
R
5×5 pixels
R G
5×5 pixels
R G
R G
5-9
Allowed
Not allowed