Acer P7280 Refresh Service Manual page 99

Inspection item
Criteria
2. Light Leak
Procedure
Inspection item
Criteria
3. Blemish (Dark)
Procedure
Inspection item
Criteria
- Adjust Resync or Frequency/Tracking/H.
Position/V. Position to the inner screen.
- Eliminate visul wavy noise by Rsync, Frequency
or Tracking selction.
- Check if there is noise on the screen.
- Horizontal and vertical position of the vedio
should be adjustable to the screen frame.
- If there is noise on the screen, the product is
considered as faliure product.
- If there is noise on the screen, use auto or
manual "frequency" function or "tracking" func-
tion to adjust the screen.
- The PC mode functionally sure be workable
include support format with frequency and auto
detected functional will be workable.
- Test equipment: video generator.
- Test signal: analog 1024x768@60Hz
- Test Pattern: gray 10 patterns
- Check if the light leaks.
* Light leak on reflective edge, eyecatcher, bond-
wires and exposed metal.
- Light leak check.
- Bright blemish (dirty).
- The bright blemish is unacceptable when it is
more than four under gray 10 pattern
- Ref. below table
Note: The defect criteria follows TI specification.
- Test equipment: video generator.
- Test signal: analog 1024x768@60Hz.
- Test Pattern: blue 60
- Dark blemish check.(dirty)
-The dark blemish is unacceptable when it is
more than four under blue 60 pattern
P7280/P7270I/P7280 Refresh/P7270I Refresh Confidential
Gray 10
Blue 60
4-5