Polarizer Defects; Foreign Material; Line Defect; Bezel Appearance - NEC MultiSync LCD1970NX Service Manual

3.3 Polarizer Defects

Scratch
Dent
NOTE: D: Average Diameter
W: Width,
Linear: a>2b,
a. Extraneous substances, which can be wiped out, like Finger
Print, Particles are not considered as a defect.
b. Defects which are on the Black Matrix (outside of Active Area)
are not considered as a defect.

3.4 Foreign Material

Foreign
Material
NOTE: D: Average Diameter
W: Width,
Linear: a>2b,
Length: The line of apsides (Long distance)

3.5 Line Defect

All kinds of line defects such as vertical, horizontal, or cross marks are not allowed.

3.6 Bezel Appearance

Scratches, minor dents, stains, dust particles on the Bezel frame are not considered a defect.
Items
Linear
Circular
D=(a+b)/2
L: Length,
Circular: a≤2b
Items
Linear
Circular
D=(a+b)/2
L: Length,
Circular: a<2b
0.01 ≤ W ≤ 0.05, 1.0 ≤ L ≤ 10.0, N ≤ 4
0.2 ≤ D ≤ 0.8, N ≤ 4
N: Quantity
0.03 ≤ W ≤ 0.10, 0.3 ≤ L ≤ 3.0, N ≤ 4
0.25 ≤ L ≤ 0.8, N ≤ 5
N: Quantity
5-9
Criteria
b
a
Criteria
b
a