Screen And Faceplate Blemishes; Definitions Of Inspection Conditions And Terms; Standard Observing Condition; Zone Division - Nokia 445PRO Service Manual

8. Screen and Faceplate Blemishes

8.1. Definitions of inspection conditions and terms

8.1.1. Standard observing condition

Distance: 30 cm from screen face. Angle 45 from Z axis.
Cosmetic inspection without raster should be done under luminance: 500lx MIN.

8.1.2. Zone division

A
302.2 mm
other screen area

8.1.3. Minimum distance beetween defects

8.1.4. Average diameter of defect

Average diameter
=

8.2. Face defect standard (black spot, stain)

Average diameter Quantity allowed
of defects A
less than 0.5 4
less than 0.3 no limit
34
B
Long diameter + Short diameter
2
Minimum
B Total distance
4 6 30
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445N