Have the JVC bulb issues been largely resolved ? - AVS Forum
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post #1 of 19 Old 12-06-2013, 07:23 PM - Thread Starter
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Hey guys -

In the next year I'm going to be picking up either a JVC X35 or maybe a 4910 / comparable Eshift model. Not into 3D.
The 2D lover in me will dig the deep black levels, but the many JVC bulb issue posts concern me for such a large investment.

Also would probably use lense memory too.

Have the JVC bulb issues largely been resolved from years past? I could swing the Sony 55 also, in that case.
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post #2 of 19 Old 12-06-2013, 10:53 PM
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yes they have

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post #3 of 19 Old 12-07-2013, 07:45 AM
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I had a calibrator friend over last night and we measured my JVC X75R to see if the calibration was holding. I have about 450 hours on it. The overall light output is identical to what I measured when the bulb was brand new. The older JVCs also varied significantly for grayscale and gamma over the first hundred hours and I didn't have any of those issues. In fact, although it has been nearly 300 hours since my last calibration the color gamut was still nearly dead on (max dE was a 2) and my grayscale only needed a touch up in red on the upper IREs. After touching up the grayscale (took all of 2 minutes) we reran the color checker workflow in CalMan and the average dE was less than .5 with the peak being 2 at one point (brown). Massive differences in stability between this year's bulbs and light engine than the years before.

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post #4 of 19 Old 12-07-2013, 10:36 AM
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Quote:
Originally Posted by noah katz View Post

yes they have

 

When exactly - model # and (if pertinent) replacement lamp generation - did they resolve it, please.

 

Thanks!

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post #5 of 19 Old 12-07-2013, 03:29 PM
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I know that the new generation about to be released and the current models are fixed, not sure before that

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post #6 of 19 Old 12-08-2013, 11:34 AM
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Only from last year's X35/55/75/95 (and RS equivalents) onwards have the lamp issues been fully resolved. Like Kris above, I recently ran a fresh calibration on my X35 and it had hardly changed in light output and calibration dE since the last time I calibrated it. That's virtually no change from 100 hours to 330 hours, bar a slight drop off in gamma at the 90% level.

Zooming: Been there, done that, bought the lens...
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post #7 of 19 Old 12-08-2013, 11:49 AM
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I'm going from the original E-shift RS55 to the RS57. I'm very glad to hear that we get a bright image for longer!
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post #8 of 19 Old 12-08-2013, 12:05 PM
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Quote:
Originally Posted by R Harkness View Post

I'm going from the original E-shift RS55 to the RS57. I'm very glad to hear that we get a bright image for longer!

And, as Kris points out, better yet is that the calibration is more stable (less drifting) which mean less frequent calibrations!!

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post #9 of 19 Old 12-08-2013, 03:22 PM - Thread Starter
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Thanks guys -

Good to hear that the newer models seem to have the problem licked. Now to demo some in the coming weeks !
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post #10 of 19 Old 12-08-2013, 03:40 PM
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I guess this merits reconsideration of the desire for a solid state light source.

Has anyone reported light output at higher hours (>1000) and total life (or current max hours)?

Noah
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post #11 of 19 Old 12-14-2013, 07:02 PM
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I purchased the X70 in January 2012 and 1year later with 1,200 hours of use the bulb died. According to JVC, it is supposed to have 2,900 hours of service so I contacted customer service and they were nice enough to send a free replacement bulb. Now another year has past with another 1,000 hours of service, and you guessed it, the bulb died again. I just sent a letter and am waiting for a reply. At $350 a bulb for just 1,000 hours of service, that's not good.
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post #12 of 19 Old 12-14-2013, 07:55 PM
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Does the X70 have the new-generation better lamp?

Noah
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post #13 of 19 Old 12-14-2013, 09:48 PM
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No. The new generation of lamps that seem to be holding up so well first showed up one year ago.
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post #14 of 19 Old 12-15-2013, 06:25 AM
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I checked My x55 yesterday, after 410 hours and nothing change in brightness. I still have iris at - 8 and low lamp.
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post #15 of 19 Old 12-15-2013, 06:49 AM
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I have an RS35 and purchased a few extra lamps at that time. So, I'm a little late to this party. Hence, a new generation of lamp comes as a surprise to me.

I didn't think JVC actually made lamps. I thought they were all made in China for JVC. Is the point of this thread that the current lamps are supposed to be more stable than the ones I bought in 2010? Does the current generation lamp look any different? How can you tell them apart?
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post #16 of 19 Old 12-15-2013, 08:07 AM
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Quote:
Originally Posted by noah katz View Post

Does the X70 have the new-generation better lamp?

No - The new generation of lamps came out (and only work) with the generation of JVC projectors that began shipping in late 2012. The two earlier generations of JVC projectors used lamps that had issues, but there were internal design changes made over time that improved the reliability of these lamps. The final generation of those lamps was the 003 series with a 'flapper' in the cooling vent. That version came out around March of 2012 and they have generally been reliable.


.

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post #17 of 19 Old 12-15-2013, 10:30 AM
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Quote:
Originally Posted by noah katz View Post

yes they have
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post #18 of 19 Old 12-15-2013, 10:57 AM
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Huh?
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post #19 of 19 Old 12-15-2013, 11:34 AM
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^^^ I was confirming Noah gave the correct answer. Starting with the 2013 models last year.
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