Acer A221HQV, Руководство по обслуживанию

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1.4.5 Defects:
1.4.5.1 Visual Inspection:
The LCD panel shall be inspected with all pixels
set to white, black, red, green and blue. The color
variation, brightness variation, and overall
appearance must meet the SPEC.
1.4.5.2 Display Degradation:
Over the life of the product, variation of the
parameters specified in Panel specification shall
be maintained within reasonable limits. The panel
must not exhibit any significant defects while in
operation (excluding the lamp operation).
This does not in any way change the warranty
given by the panel manufacturer.
1.4.5.3 Light Leakage:
Except for the active display area, there shall be
no light emission visible from any angle from any
other part of the display. For this test, the ambient
illumination will follow the panel specification 300
to 700 lux
．
1.4.5.4 Allowable Defects:
No cosmetic defects are allowed except those
specified below. The conditions of visual
inspections are as follows:
- Viewing distance: 35 ~ 50cm.
- Ambient illumination: 300 to 700 lux.
- Viewing angle shall be at 90 degree.
- Defects not apparent within one minute shall be
ignored.
1.4.5.5 Defect Terminology:
The following gives the descriptive terms used in
classifying defects
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 appears 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.
When the unit lights, lines appear light (white)
Dark Spots / Lines:
Bright Spots / Lines:
Polarizer Scratch:
1. Product Specification (continued)
with display patterns dark and do not vary in size.
Physical damage to the polarizer does not damage the
glass.
When the unit lights, spots appear light (white) with
display patterns dark and do not vary in size. Physical
damage to the polarizer 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.
When the unit lights, variation / non - uniformity(splotch)
appears light (white) with the display and might vary in
size.
When the unit lights, line(s) in the minor (vertical) or
major (horizontal) axis appear dim, but not completely
on or off.
When 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 non-uniformity 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 Acer will be reviewed by Wistron as they become
apparent. These panels will be referred to the Wistron
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 luminance at the LCD panel
is between 1000 lux. and 1500 lux. Defect limits are
given inTable 4 .
Polarizer Dent:
Rubbing Line:
Newton Ring:
Mottling:
Dim Line:
Cross Lines Off:
Bright/Dark Dot:
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ACER A211H/A221HQ