Acer X1160' Service Manual page 66

Inspection item
Criteria
2. Light Leak
Procedure
Inspection item
Criteria
- If not re-adjust by the following steps:
(1) Select "Frequency" function to adjust the
total pixel number of pixel clock in one line
period.
(2) Select "Tracking" function and use right or
left arrow key to adjust the value to minimize
video flicker.
- Adjust Resync or Frequency/Tracking/H.
Position/V. Position to the inner screen.
- Eliminate visual wavy noise by Rsync, Frequen-
cy or Tracking selction.
- Check if there is noise on the screen.
- Horizontal and vertical position of the video
should be adjustable to the screen frame.
- If there is noise on the screen, the product is
considered as failure 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 pattern
- 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 on gray 10 pattern
- Ref. Defect specification table
Note: The defect criteria follows TI specification.
X1160 Family/X1260 Family Confidential
Gray 10
4-4