Acer X223 X223W LCD Service Guide - Page 8

1. Product Specification (continued) ACER X223W 7 Go to cover page 1.4.5.5 Defect Terminology Table 3 gives the descriptive terms used in classifying defects. Dark / Spots / Lines Bright Spots / Lines Polarizer Scratch Polarizer Dent Rubbing Line Newton Ring M ottling Dim Line Cross Lines Off Bright / Dark Dot Spots or lines that appear dark in the display patterns and are usually the result of contamination. Defects do not vary in size or intensity (contrast) when contrast voltage is varied. Contrast variation can be achieved through the use of varying gray shade patterns. Spots or lines that appear light in the display patterns. Defects do not vary in size or intensity (contrast) when contrast voltage is varied. Contrast variation can be achieved through the use of varying gray shade patterns. W hen the unit lights, lines appear light (white) with display patterns dark and do not vary in size. Physical damage to the polarizer that does not damage the glass W hen the unit lights, spots appear light (white) with display patterns dark and do not vary in size. Physical damage to the polarizer that does not damage the glass. Horizontal or diagonal lines that appear gray with the display patterns dark and may have resulted from an "out of control" rubbing process on the polyimide or "waves" on the BEFs or prism sheets. The "rainbow" effect caused by non-uniform cell thickness. W hen the unit lights, variation / non - uniformity (splotchiness) appears light (white) with the display and might vary in size. W hen the unit lights, line(s) in the monitor (vertical) or major (horizontal) axis appear dim, but not completely on or off. W hen the unit lights, lines in both the minor and major axis do not appear. A sub - pixel (R,G,B dot) stuck off / on (electrical). 1.4.5.6 Smudges, Streaks and Smears When viewing the panel oriented so as to maximize reflected light , there shall be no visible smudging , streaking, smearing or other nonuniformity from contaminants ,fingerprints,or defects in any of the visible surfaces. This is independent of whether the unit is operating or off . 1.4.5.7 Other Defects Undefined defects that are considered to be rejectable by Lite-On will be reviewed by Lite-On as they become apparent. These panels will be referred to the Lite - On Corporate / Manufacturer Purchasing Agreement for disposition. 1.4.5.8 LCD Inspection Put LCD panel on inspection table and illuminate the panel with a daylight fluorescent lamp located above the panel surface such that the illuminance at the LCD panel is between 1000 lux and 1500 lux .Defect limits are given in Table 4 . 1.5 Optical Characteristics Depends on the LCD supplier's spec. Details refer to QA Inspection Spec. Average Diameter smaller of (L+W)/2 or L/20+2W Acceptable Number Minimum Separation < 0.1mm Non countable N/A 0.1 mm ~ 0.3 mm 10 15 mm 0.31 mm ~ 0.5 mm 10 15 mm 0.51 mm ~ 1.25 mm 5 15 mm 1.26 mm ~ 2.5 mm 3 25.4 mm 2.51 mm ~ 3.75 mm 3 25.4 mm Greater than 3.75 mm NONE Not applicable Note : Allowable distance between spots of two sizes is the minimum separation number for the smaller spot. Therefore, if there are two spots, 1.30mm and 0.4mm in diameter, they must be at least 15mm apart.