The Inspection Standard Of Appearance; Polarizer Defects; Foreign Material; Line Defect - NEC LCD1501-BK Service Manual

5.3 The inspection standard of appearance

5.3.1 Polarizer defects

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

5.3.2 Foreign material

Foreign
Material
NOTE: D: Average Diameter
W: Width,
Linear: a>2b,
Unit: mm

5.3.3 Line defect

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

5.3.4 Bezel appearance

Scratches, minor bents, stains, particles on the Bezel frame are not considered as a defect.
Items
Linear
Circuar
L: Length,
Circular: a<2b
Items
Linear
Circuar
L: Length,
Circular: a<2b
0.05 ≤ W ≤ 0.2, 5.0 ≤ L ≤ 10.0, N ≤ 4
0.2 ≤ D ≤ 0.5, N ≤ 6
D=(a+b)/2
N: Quantity
0.05 ≤ W ≤ 0.1, 0.3 ≤ L ≤ 4.0, N ≤ 4
0.2 ≤ D ≤ 0.5, N ≤ 6
D=(a+b)/2
N: Quantity
5-12
Criteria
b
a
Criteria
b
a