Acer H6510BD Acer Projector H6510BD, P1340W, X1140, X1240 Service Guide - Page 111

4. Keystone Calibration (Only for X1140A/X1240/P1340W) Condition：Horizontal plane(0∘) 1. Make projector be horizontal 2. Enter factory menu 3. Enter into Block 3 in factory menu 4. Press "AutoKeystoneAngleCalEnable " to enable this function. 5. Set the projector on the table adjust to 0 degree. 6. Select item "AutoKeystoneCal" 7. Press key Left or Right to do auto calibration 8. Finish 0∘calibration and bellow items will show data: -5≤ AutoKeystoneXCal ≤43 AutoKeystoneXOffset ≤ 20 111