Acer K130 Acer K130 Projector Service Guide - Page 51

Inspection item Criteria 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. Position/ V. Position to the inner screen. - 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. - 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" function to adjust the screen. - The PC mode functionally sure be workable include support format with frequency and auto detected functional will be workable. 2. Bright Pixel Procedure Inspection item Criteria - Test equipment: video generator - Test signal :1280*800@60Hz - Test Pattern: Full black -Bright pixel check - Adjacent pixels are unacceptable. - If there is blemish on full black pattern, please use gray 10 pattern to judge it. -Ref. Pixel specification table Full Black K130 Confidential 4-