Other - Acer S1200 Service Manual

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Criteria
4. Uniformity
Procedure
Criteria
4-9 Others
1. Functional Inspection
Keypad button
General
Factory Default
Display Size
- Follow Contrast formula to calculate contrast values.
☼ Contrast Formula
P5/B5
Note: P5=center of white image
B5=center of black image.
- 1300:1
- Full white pattern
- Use CL100 to measure brightness values of P1~P9
(see image: full white).
- Follow the Uniformity formula to calculate
average values.
☼ Uniformity Formula
ANSI Uniformity = Avg. (P1, P3, P7, P9) /P5X100%
- 65%
- All keypad buttons must operate smoothly.
- All OSD functions must be checked for functionality. When OSD menu is
displayed, there shall be no visible peaking, ringing, streaking, or smearing
artifacts on the screen.
- The factory settings (with appropriate centering, size, geometry distortion,
etc.) shall be displayed upon "Recall" is selected from OSD
- All preset modes shall expand to full screen size using OSD Horizontal and
Vertical Size controls
S1200
Confidential
4-11

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