Originally Posted by thrang
Ok, so checking again - using some external lighting to see better, the iris seems fully open when off. When powering on, after 10 seconds or so, it closes about 20% (not at all completely), then opens again fully
Thanks for your observations.
That is the same pattern of behaviour that I am seeing in the 870 and 760.
That means that your iris is powered and functional.
Out of curiosity, when you say it closes 20%, do you mean it closes to a 20% opening or it only closes 20%?
To check for normal operation: When content is being viewed that contains light and dark parts (such as the 'famous' starfield shot in Interstellar (and the part immediately preceding that shot where he is recording the video in the cabin)), and Dynamic Control is set to Full, you should see obvious movement of the iris when going from bright to dark etc. Be sure you use the SDR version of the disc (or any suitable disc like Ghost in the Shell too) to check the operation of the iris as it is far more active in SDR films than HDR.
*It goes without saying that one should never look directly into the lens when lit and or course due caution should always be exercised when looking into the lens of any lit projector even from an angle*
“Remember to look up at the stars and not down at your feet. Be curious. And however difficult life may seem, there is always something you can do and succeed at. It matters that you don’t just give up."
Last edited by Archibald1; 11-19-2019 at 08:09 AM.