Optoma Dx550 Projector User Manual
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EN-51 Freeze Freeze the projected image. AV m u t e Cut off the AV Mute temporarily. Only pressing AV Mute again can output sound and image. If any other buttons are pressed, the projection image will become abnormal and no sound will be output. S-Video Display S-Video signal. VGA Switch input source to VGA1 or VGA2 by sequence. Video Display video signal.