Acer P7280 Refresh Service Manual page 100

4. Dead Pixel (Bright pixel)
Procedure
Inspection item
Criteria
5. Dead Pixel (Dark pixel)
Procedure
Inspection item
Criteria
6. Focus test
Procedure
Inspection item
Criteria
- Ref. below table
Note: The defect criteria follows TI specification.
- Test equipment: video generator.
- Test signal: analog 1024x768@60Hz.
- Test Pattern: full black
- Bright pixel check.
Note: Frame dimension under operative zone1
inch
- Bright pixel is unacceptable.
- Ref. below table
Note: The defect criteria follows TI specification.
- Test equipment: video generator.
- Test signal: analog 1024x768@60Hz.
- Test Pattern: full white
- Dead pixels check.
- White pattern (IRE=100)
- Adjacent dark pixel.
- The number of the dead pixels should be less or
equal to 6 pixels.
- Adjacent pixel with each other is unacceptable.
- Ref. below table
Note: The defect criteria follows TI specification.
- Test equipment: video generator.
- Test signal: analog 1024 x 768@60Hz
- Test Pattern: full screen or MEME Sony
- Focus check
- From screen 1.91 M
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
P7280/P7270I/P7280 Refresh/P7270I Refresh Confidential
Full black
Full white
Full screen
MEME Sony
4-6