Acer P5271 Acer P5271, P5271i, P5290 and P5390W Projector Series Service Guide - Page 71

right sides should not over 4 color levels.) - Gray level should not have abnormal color or heavy lines. - If color appears abnormal, please get into service mode to do color wheel index adjustment. 4-8 PC Calibration Procedure - Test equipment: video generator - Once Main Board is changed. PC Calibration should be done as well. (1) Test signal analog: 1024 x 768 @60Hz �(�f�o���r� P5271/P5290/P5271i); 1280 x800@75H (for P5390W) (2) Test Pattern: White (up) Black (down) - Note (1) Calibration pattern should be in full screen mode. (2) Please press "Power", "Left", "Left" and "Menu" buttons sequentially to get into Service Mode. (3) Choose "Analog Settings", press "Menu" button to access "PC Calibration" for correction. Choose "Exit" to leave the Service Mode. Check pattern - Test signal: 1024 x 768 @60Hz �(�f��o���r� P5271/P5290/P5271i); 1280 x800@75H (for P5390W) - Test pattern: 64 gray RGBW * After finishing ADC adjustment, check 64 gray RGBW pattern. Inspection item - Color saturation Criteria - There should not have any lack of RGBW. The color should appear normal and sort in right order. - Color levels should be sufficient and normal. (the unidentified color levels on both left and right sides should not over 8 color levels.) White/Black 64 gray RGBW P5271/P5290/P5390W/P5271i Confidential 4-