Originally Posted by Probe
attached is an image of a 100% white. Am I being too picky in thinking I need to have my 4000 serviced, or is this typical uniformity for an LCD projector?
Both of my Pannys (AE700, AX200) had that same problem, and, by appearances, to the same degree. Though it was rarely visible in a color image, it was witheringly obvious in a black and white one. Oddly, since neither site always, or even usually, brings it up, both Art Feierman & Cine4home (if I recall correctly) referenced the issue, actually giving the AX200 high marks, with screen shots to prove it. Naturally, then, I was extra
rankled to find my own AX200 repeating what I'd endured with my 700, and I've assumed it's a luck-of-the-draw issue. I think most of the more saavy PJ folks believe this to be essentially a convergence issue, in which the LCD panels are not entirely, pixel-for-pixel uniform with each other, so they can't really be perfectly aligned other than to reconcile the central area of the image, pushing the poorly converged areas to extremes. This results in bluish/greenish areas opposite, in any direction, from magenta areas, sometimes with a lot of one on one side, and less of the other opposite, depending on how centrally the converged area is located. For what it's worth, I've read so many comments by now on the subject from Panny owners that I've come to believe Panasonic PJs are particularly susceptible to the problem. I'm sorry to see it's persisting in the 1080 models (yours is the third report of it I've seen on the 4000). After so much time spent grimacing through every black and white viewing, I'd be very interested to learn which, if any, brand(s) do consistently well in this regard. Naturally, it's a non-issue for single-panel DLPs.