Originally Posted by Mr. Neverbicker
I am also having the DI "out-of-bounds" issue on my RS540. There is some minor clicking and pumping, but not enough to bother me or make me not want to use DI. My issue is that during a movie, the range between upper and lower brightness bounds becomes reduced through the duration of the movie. Wherein the lens stops opening fully on the brightest scenes and stops closing fully on the darkest scenes. This correlates to what I'm seeing others have experienced. I've found that I can temporarily correct the issue by switching to manual and cycling a few times over the full range between fully closed and fully open, and then switching back to auto.
I see some people resort to using Manual iris, but the problem for me is that DI "Auto 2" produces a MUCH better experience. This is very clear. I've really tried liking the Manual setting, particularly as a means to avert the DI issue, but I just can't come to terms with giving up on DI.
My RS540 is out of warranty, so I'd like to get as much info about this issue as I can so that I can figure out my options. It would be really nice if there were a firmware fix.
Can you work out if the DI is simply jamming up and not working, or seems to be mis-ranged? If you try opening or closing the manual iris, does the lens iris (diamond you can see in the lens) appear to reach fully closed or fully open significantly before either end of the adjustment range?]]
The lamp iris can certainly be mis-ranged quite easily on my X7900, and can also be re-ranged. This is a different mech to
1) Set HDR and SDR modes to have different iris - say -15 for SDR and 0 for HDR.
2) Play HDR content and see that the PJ automatically switches to HDR mode and opens iris
3) Turn off projector.
4) Make sure SDR content is playing.
5) Turn on projector. It will think the iris is at SDR position (-15) but will be at HDR position (0).
6) Attempt to open iris a few steps - you'll hear it grinding off the end stops, and maybe break it if you do it enough.
You can reverse it by turning off with SDR playing and making sure HDR is playing when you next start up. It will then think the iris is in correct position.
I don't know if the DI (lens) iris can be similarly unsynchronized. If it can, then this procedure might get it working.
If that is the case it is quite possible that folk who get it fixed and then find it breaking again just use their projector in a way that provokes the unsynchronization - perhaps they turn it all off while watching HDR and then turn it back on with an SDR menu. That would likely break it frequently.