Acer K130 Service Manual page 53

Pixel specification
Order Symptom
1
Bright pixel ( dots)
2
Dark pixel(dots)
3
Bright blemish
4 Dark Blemish

Bright dot on frame
6
Unstable pixel
7
Adjacent dark pixel
6. Focus Test
Procedure
Inspection item
Criteria
Note:After adiust the focus , if the screen appear as picture A will be
regarded as OK .Otherwise , if the screen appear as picture B will
be adjudicated as NG.
Full black
Full white
Gray 10
Blue 60
Full black
Full white & Full
black
Full white & Full
black
- Test equipment: video generator
- Test signal: 1280*800@60Hz
-Test Pattern: Full screen
- Focus check
- From screen 1.0M via visual to check the focus, look
at the entire screen, focus shall be clear, crisp, and
sharp over the entire surface of the display pattern.
(Blur word on one of the corner after adjustment is
acceptable. However, the word should at least
be recognizable.)
Pattern
A=0
A ≤ 3
A=0
A =0
≤ 1
A ≤ 1
A = 0
Criteria
K130
Confidential
Full Screen
A OK
B NG"Poor"
4-