Originally Posted by coolgeek
Anyone finds this projector losing contrast over time? I heard report that Sony's SXRD chips loses contrast over time and lots of contrast too..
Contrast loss is believed to be related to humidity , most will agree on that . If the projector is in a dry room , humidity controlled it can be as good as new . In a humid environment with low cycle of usage it can degrade.
Ekki @ cine4home has pointed out the degrading is subject to humidity and usage not just time on the lamp as I was wrongly told. Best advise is to check before a purchase or at the very least find out the conditions and location.
My unit was now 3 years old was 10,500:1 contrast ration when I sold it this summer, it had 900 hours on the lamp . That contrast ratio is as good , if not better than most new. My room was very, very dry .
Saying all WILL fail is wrong, saying a preexisting condition exists on some older panels is probably correct. A little knowledge and some caution can keep this projector in like new condition for a long time .
JVC is not oblivious to moisture and humidity either , see below what Ekki from cine4home said just recently in these threads. If you own a JVC and don't keep on top of it you can have issues, color can be permanently
degraded if not careful during the auto-cal process. JVC needs constant vigilance obviously to stay in line but I would say that is a factor of how bad the humidity is . I have a RS600, my room is super dry and the unit
appears to be spot on up to this point, 7 months and 300 hours later .
As I said a little knowledge goes a long way, we have Mr Ekki from cine4home to thank for this . If it can help everyone , all is good .
Originally Posted by Cine4Home
The JVC Gamma drift / banding / color space shrinkage are not(!) related to usage hours, but only to time. You have to recalibrate every 2 to 3 months no matter how you use it. And you should only(!) correct the Gamma with autocal if you do not want to degrade the Color accuracy of the projector forever.
I collected dozens and dozens of measurements and some still drift after many hundreds of hours of usage. Others drift even more in 3 months with hardly any usage and so on... the only pattern I can see so far is that they get more stable after over a year. It is probably additionally related to external conditions like temperature and humidity, just like with the Sonys: Some will slow down the drift, others will accelerate it.