Acer PD525 PD525 Service Guide - Page 52

Performance Troubleshooting (Computer Signal) A. Have Image? - Ensure the Signal cable and Source work as well. - Check that can OSD Menu show on the screen. - Check the Main board. - Check the DMD board. B. Have Garbage Pattern? - Ensure the Signal cable and Source work as well. - Check the Main board. - Check the DMD board. C. Uniformity OK? - Ensure the Projection screen without dirty. - Ensure the Projection lens is clean. - Ensure the Brightness is within spec. (Replace the Lamp if the Brightnedd is less than spec.) - Check the Optical engine. D. Is Color OK? - Ensure the Signal cable works as well. - Check the "Color wheel index" in the service mode of OSD Menu.(*Note) - Check the Photo sensor. - Check the Main board. - Check the DMD board. E. Dot Defect isn't Compliant with the Spec. - Ensure the Projection lens is clean. - Use the Air gun for the Optical engine clean. - Check the DMD chip. F. Have Noise? - Ensure the Signal cable and Source is work as well. - Adjust the Tracking selection in OSD Menu. - Press the Menu button to check that have the noise issue appear on OSD Menu. (Check the DMD board if the noise also appear on the OSD Menu.) 47 Chapter 4