I'm looking for help, please for an issue I don't think I've read about before. I have an August build NX7 and I've suddenly got what can best be described as a "broken color".
I've been calibrating with Chromapure over the last week and as of a few days ago I could get the color red to be about 99% fully saturated, but as of yesterday the DeltaE on the
CIE chart suddenly has between a -6% and -8% error for saturation. This is definitely able to be seen by eye, too, as the 100% red screen looks deep red/orange now and not like a deep/strong red at all, as before. (I mention this
so as to eliminate the i1Display Pro meter readings, which have been reliable enough.) On my computer, the Chromapure logo has its normal green, blue & red triangles and on the StudioTek 130 they always looked that way, too, but on the screen now, the triangles are green, blue & orange.
Red has always been problematic for my unit, as if I close down the manual iris more than -12, I get a lightness error that can't be corrected and if set it to -11 or less, red saturation would never be better than -3.5%,
so I'm pretty much stuck at the -12 setting - which is at least fine for screen foot lambert numbers. Trying to increase saturation won't budge, even if you max it out at +30, it doesn't move at all. Magenta has suffered also, but only about half as bad as red, while green, blue, cyan & yellow dial-in perfectly. Also, 25%, 50% & 75% red readings seem to be fine. It's simply that I suddenly can't get red anywhere near 100% saturation now (in the triangle, the red dot is not even close to the 100% red square box) and related to this, hue has become way off, as well. Normally red hue was always set at -2, but now to straighten that out takes -8. (This explains the visually obvious orange tint.) I'm using both the AVS calibration disc, as well as the Chromapure disc and both are consistent.
Now I've checked all settings in the NX7, as well as the Panasonic UB9000 to ensure something isn't set out of whack, but everything is fine. The NX7 settings, specifically are: Brightness -3, while color, tint & sharpness are all at default 0.
I'm using User 1 profile with Custom 1 color and 6500K and 2.3 gamma. (By the way, this is all relative to BT.709 HD and I haven't done any calibrating for 4K.) All motion options are off. I need to set the unit to super white, otherwise all colors clip and contrast clips just about everything, per Spears & Munsil disc. (Probably because green gain is really high before I lower it.) The bulb has approximately 1,300 hours on it and has always been used on "low", even for 4K.
Oddly enough, I can get grayscale very well balanced and a nice flat gamma, but that red drainage just ruins everything, as it's definitely noticeable, not only on the 100% test pattern, but in movies, too.
Do you know what can be done to correct this red shortage? I'd hate to send the projector in for repair due to this issue, as everything else is fine. Is there an adjustment in the service menu that can restore my "normal"
red settings? (I don't want to use the service menu, but just wondering if that's an option.) Would a factory reset help at all?
(I considered posting this on the calibration forum, but it's not a "how to" issue, per se, but more a broken/repair issue.) Reverting back to the out-of-box factory setting of "Natural"/6500K/BT709 with no user menu color corrections does not fix the sudden red shortage, either.
Thank you and sorry for the long post.