Text preview for : BLEMISH.PDF part of Nokia 446PRO Service Manual-Part list
Back to : Nokia Monitor 446pro_446f | Home
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. Color and brightness 8.1.2. Zone division 273.6 mm
A
273.6 mm
B
other screen area A Zone: 273.6 mm x 273.6 mm B Zone: The balance of useful screen area 8.1.3. Minimum distance beetween defects
8.1.4. Average diameter of defect Average diameter = Long diameter + Short diameter 2
8.2. Face defect standard (black spot, stain)
Average diameter of defects less than 0.5 less than 0.3 Quantity allowed A 4 no limit B 4 Total 6 Minimum distance 30 ---
446F
31
8.3. Glass blemish
8.3.1. Scratch Width W>0.05 0.05
8.3.2. Bubbles/Foreign materials Bubbles Average diameter of defects 0.3---0.45 Air blister (Max. legth 6.0) (Max. width 0.3) Quantity allowed Within any 70 mm 2 2 Minimum distance circle 12.7 12.7
Foreign material Apply the face defect standard for blackish defects Average of diameter Quantity allowed of defects within any 70 circle 0.25---0.45 2 Minimum distance 12.7
Note: No limit for the defects less than 0.25 mm average diameter
32
446F