Acer P1100C Series, Service Manual

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P1100C/P1200i/P1200B Confidential
4-4
4-6 PC MODE
Note: - When getting into function test, adjust "Zoom Ring" to guarantee
the lens at the highest state and the image maximum, and
adjust the focus to guarantee the image at the clearest, then
start test.
- Test signal:
1024(H) x 768(V) (P1200i/P1200B)
800(H) x 600(V) (P1100C)
- Here we take P1200i for example.
1. Frequency and Tracking Boundary
Procedure - Test equipment: video generator
- Test signal: 1024(H) x 768(V)
- Test Pattern: General-1 or Master
- Check and see if the image sharpness is well
performed.
- 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. Posi -
tion/V. Position to the inner screen.
Inspection item - Eliminate visual wavy noise by Resync,
Frequency or Tracking selection.
- Check if there is noise on the screen.
- Horizontal and vertical position of the video
should be adjustable to the screen frame.
Criteria - If there is noise on the screen, the product is
considered as failure product.
- If there is noise on the screen, use auto or manu -
al "frequency" function or "tracking" function to
adjust the screen.
- The PC mode functionally sure be workable
include support format with frequency and auto
detected functional will be workable.
General-1
Master