Acer
Service Manual
17
5.
PICTURE CHECK
5.1
Check brightness uniformity
5.1.1
Test mode: 1920x1200 @ 60 Hz
5.1.2
Test pattern: pattern #41 of “WHITE”
5.1.3
Test tool: Color Analyzer Chroma7120
5.1.4
Set brightness and contrast to be maximum, apply pattern as Fig.3, it should be the following
requirement:
%
≥
75
)
(backlight
points
nine
of
luminance
Max.
)
(backlight
points
nine
of
luminance
Min.
Defect Type
Count (N)
Majo
r
Minor
Specification Size
Black spots which appear when B/L
operating
0.15mm
≤
D
≤
0. 5 mm
Dot Shape(Particle
、
Scratch and
Bubbles in Display area or on The
Polarizer)
N
≤
3
●
L
≤
0.5mm and W
≤
0.05 mm
Ignored
0.5mm < L
≤
5mm and
0.05mm < W
≤
0.1mm
N
≤
4
Line Shape
(Particles
、
Scratch
、
Fiber and
Bubbles in display area or on The
Polarizer)
L > 5mm or W > 0.1mm
N = 0
●
Display non-uniformity
There should be non-uniformity through 5%
transparency of filter or judge by limit sample if
necessary.
●
●
Scratch
No harm
●
Dirt
Wrap No
harm
●
Bezel
Sunken No
harm
●
●
No label
●
Invert label
No
●
Broken
Word can be read.
●
Dirt
Not clear
●
Label
●
Word out of shape
Mistake No
●
●
Position
Be attached on right position
●
Not enough
No
Screw
Limp No
●
●
Connector
Connection status
No bend on pins and damage
FPC/FFC Broken
No
●
