Acer S1200 Service Manual page 61

Inspection item
Criteria
2. Light Leak
Procedure
Inspection item
Criteria
3. Blemish (Dark)
Procedure
Inspection item
key to adjust the value to minimize video flicker.
- 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 30 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 30 pattern
- Ref. above 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)
S1200
Confidential
Gray 30
Blue 60
4-5