ViewSonic LS620X LS620X User Guide English - Page 28
Adjusting the projected image, Auto-adjusting the image, Fine-tuning the image clarity
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Adjusting the projected image Adjusting the projection angle If the projector is not placed on a flat surface or the screen and the projector are not perpendicular to each other, the projected image becomes trapezoidal. To correct this situation, see "Correcting keystone" on page 23 for details. Do not look into the lens while the light source is on. The strong light from the light source may cause damage to your eyes. Auto-adjusting the image In some cases, you may need to optimize the picture quality. To do this, press Auto Sync on the remote control. Within 5 seconds, the built-in Intelligent Auto Adjustment function will re-adjust the values of Frequency and Clock to provide the best picture quality. The current source information will be displayed in the upper left corner of the screen for 3 seconds. The screen will display ViewSonic logo while auto adjustment is functioning. This function is only available when PC D-Sub input signal (analog RGB) is selected. Fine-tuning the image clarity Sharpen the image by rotating the focus ring. Correcting keystone Keystoning refers to the situation where the projected image becomes a trapezoid due to angled projection. To correct this, besides adjusting the height of the projector, you will need to manually correct it following one of these steps. • Using the projector or remote control 1. Press / to display the Keystone correction page. 2. Press to correct keystoning at the top of the image. Press to correct keystoning at Press / Press / the bottom of the image. • Using the OSD menu 1. Open the OSD menu and go to the DISPLAY > Keystone menu. 2. Press Enter. 3. Press to correct keystoning at the top of the image or press to correct keystoning at the bottom of the image. 23