Acer P3250 Acer P1350 and P3250 Projector Series Service Guide - Page 73

☼ Contrast F ormula P5/B5 Note: P 5=center of white image B5=center of black image. Criteria - 1400:1 4. Uniformity Procedure Criteria - 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 F ormula ANSI Uniformity = Avg. (P1, P3, P7, P9) /P5X100% - 65% 4-9 Others 1. Functional Inspection Keypad button - All keypad buttons must operate smoothly. General  - 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. Factory Default - The factory settings (with appropriate centering, size, geometry distortion, etc.) shall be displayed upon "Recall" is selected from OSD Display Size  - All preset modes shall expand to full screen size using OSD Horizontal and Vertical Size controls P3150/P3250/P3150 Refresh/P3250 Refresh Confidential 4-11