Official JVC - 20LTD - RS640 (x990/x9900) - RS540 (X790/x7900) - Owners Thread - Page 351 - AVS Forum | Home Theater Discussions And Reviews
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post #10501 of 12895 Old 01-24-2019, 03:18 PM
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Originally Posted by Tom Riddle View Post
It's 1.5' from the top border, then probably another 2' and some inches to the middle and then 2' and some inches to the bottom. You think the lens shift could make it that far down?
You may be OK, depending on the “some inches”. The lens shift range is 80% of the screen height from the screen centre, or 30% from the screen top. If your screen height is 4’ then the projector can be located up to about 1’ 3” above the screen top.
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post #10502 of 12895 Old 01-24-2019, 03:39 PM - Thread Starter
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Originally Posted by umjs78 View Post
I have no non hdr title so I played blu-ray and set picture mode custom then i switch back uhd hdr title, picture mode doesnt switch back to hdr and it stays but it says HDR as i mentioned.

and yes 820 set to sdr2020 and status window says its feeding sdr2020

btw my jvc is x590r, is this a problem?
How does the image look desite what the menu says? Do the recommended settings for sdr2020 produce a good picture?

I'm forgetting differences between the 590 and 790/990.
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post #10503 of 12895 Old 01-24-2019, 04:33 PM
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Question Newbie questions #1

My RS-640 just arrived today. Pardon me if I’m asking basic questions but if anyone can help, I’d appreciate it.

The projector is very quiet. But if you change video sources or some projector settings, I hear a clicking that sounds like a fan has gone bad. It goes away after a few seconds. Is this normal?

I scowered the jvc site and could not find any firmware update for this projector. I’m on v12.1. Is there any other update?

If I play a uhd disk from my Sony 700 player through my denon 6300, it plays fine. The projector sees a 4k hdr signal. And it really “looks” like 4k to me. This might be more of a Sony question but the projector displays a “no signal” when I go to the home menu of the disk player. It should display the apps which are in the home screen if the Sony. If I connect the Sony to a 1080p tv, the apps are back. If I subsequently connect it back to the denon, the apps are back on the projector. But I cannot get any 4k content from vudu or Netflix to play in 4k on the projector. It’s all 1080p. But start a uhd disk and we are back to UHD again. So the player “can” output UHD just not with the apps. (Note: I’ve never tested the Sony 700 on another 4k tv to see if I can get 4k from it’s apps)

(See update below.)
I’d think the the Sony issue is 100% a Sony issue except I have a similar problem with chromecast Ultra. It won’t play anything back higher than 1080p either. These devices should recognize that the display accepts a 4k signal, correct? And if so, I should get 4k content. I’ve used the chromecast ultra many times on my vizio tv and I get 4k there without issue.

Is there some setting I need to enable on the JVC so that other hdmi devices realize it’s a 4k device?

Update: I solved the chromecast problem, actually 2 problems. Chromecast ultra comes with a different power supply than the regular ones. I wasn’t using the ultra’s power. Also, I swapped out my older cable from denon to jvc with a new ultra premium certified 2 20’ cable. Now chromecast works. Also switching between disk and apps work on sony. But still can’t get Sony apps to play in 4k. But this is fine. I can just use the chromecast ultra.

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Last edited by DVDMike; 01-24-2019 at 05:23 PM.
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post #10504 of 12895 Old 01-24-2019, 04:44 PM
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Originally Posted by DVDMike View Post
My RS-640 just arrived today. Pardon me if I’m asking basic questions but if anyone can help, I’d appreciate it.

The projector is very quiet. But if you change video sources or some projector settings, I hear a clicking that sounds like a fan has gone bad. It goes away after a few seconds. Is this normal?

I scowered the jvc site and could not find any firmware update for this projector. I’m on v12.1. Is there any other update?

If I play a uhd disk from my Sony 700 player through my denon 6300, it plays fine. The projector sees a 4k hdr signal. And it really “looks” like 4k to me. This might be more of a Sony question but the projector displays a “no signal” when I go to the home menu of the disk player. It should display the apps which are in the home screen if the Sony. If I connect the Sony to a 1080p tv, the apps are back. If I subsequently connect it back to the denon, the apps are back on the projector. But I cannot get any 4k content from vudu or Netflix to play in 4k on the projector. It’s all 1080p. But start a uhd disk and we are back to UHD again. So the player “can” output UHD just not with the apps. (Note: I’ve never tested the Sony 700 on another 4k tv to see if I can get 4k from it’s apps)

I’d think the the Sony issue is 100% a Sony issue except I have a similar problem with chromecast Ultra. It won’t play anything back higher than 1080p either. These devices should recognize that the display accepts a 4k signal, correct? And if so, I should get 4k content. I’ve used the chromecast ultra many times on my vizio tv and I get 4k there without issue.

Is there some setting I need to enable on the JVC so that other hdmi devices realize it’s a 4k device?
My 540 clicks when switching from SDR to HDR, or from THX to another picture mode. It’s quite audible, but seems normal.

Is your Sony player set to 4:4:4? The cable I originally had installed with my 540 wasn’t capable of 4:4:4 and the menu wouldn’t show if set 4:4:4, but the disc would still play and give an image. Changing the cable solved my problem. Another thing to check is to make sure your receiver is set to enhanced instead of standard on 4k output signal.
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post #10505 of 12895 Old 01-24-2019, 06:29 PM - Thread Starter
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Originally Posted by Tom Riddle View Post
My 540 clicks when switching from SDR to HDR, or from THX to another picture mode. It’s quite audible, but seems normal.
The click is normal, it is the color filter being moved in and out of position.
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post #10506 of 12895 Old 01-24-2019, 06:58 PM
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I hate the color filter. I disable it. I prefer the brightness instead.
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post #10507 of 12895 Old 01-24-2019, 07:02 PM
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Originally Posted by markmon1 View Post
I hate the color filter. I disable it. I prefer the brightness instead.
How do you disable the color filter and are their any negatives in doing so?

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post #10508 of 12895 Old 01-24-2019, 07:05 PM - Thread Starter
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Originally Posted by markmon1 View Post
I hate the color filter. I disable it. I prefer the brightness instead.
I run custom rec709NF and bt2020F. you definitely get a step in brightness, and for sdr it equates to almost a step down in manual iris. No filter for hdr, is a different story. I prefer the expanded color gammut. That said, i wish i had asked chad for a bt2020NF.

Also, there is no reason to run the filter with sdr, as it expands the gamut beyond rec709.

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How do you disable the color filter and are any negatives in doing so?
In sdr you run video, normal and cinema1 (i think any thing but THX?). For hdr you run HDR instead of bt2020. You can make additional options when you calibrate the projector.

To see the difference, with hdr content, switch between hdr and bt2020, pay attention to color and image brightness. The consequences of no filter for hdr, you get a small increase in lumens, at the cost reduded P3 gamt coverage. (colors are less vibrant - defeating one purpose of hdr.)

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post #10509 of 12895 Old 01-24-2019, 07:28 PM
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Originally Posted by Bytehoven View Post
I run custom rec709NF and bt2020F. you definitely get a step in brightness, and for sdr it equates to almost a step down in manual iris. No filter for hdr, is a different story. I prefer the expanded color gammut. That said, i wish i had asked chad for a bt2020NF.

Also, there is no reason to run the filter with sdr, as it expands the gamut beyond rec709.



In sdr you run video, normal and cinema1 (i think any thing but THX?). For hdr you run HDR instead of bt2020. You can make additional options when you calibrate the projector.

To see the difference, with hdr content, switch between hdr and bt2020, pay attention to color and image brightness. The consequences of no filter for hdr, you get a small increase in lumens, at the cost reduded P3 gamt coverage. (colors are less vibrant - defeating one purpose of hdr.)
You know I myself I'm still trying to figure this out.. When I switch from bt2020 to hdr is it noticeable? I dont notice anything but I'll try again next time I turn on the projector.. How much brightness do you gain?
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post #10510 of 12895 Old 01-24-2019, 07:30 PM
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Also, there is no reason to run the filter with sdr, as it expands the gamut beyond rec709.
On my x750 the green does not quite hit Rec709 (and apparently bobof found the same). If you create the custom Rec709F profile the gamut will not go beyond the defined gamut.
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post #10511 of 12895 Old 01-24-2019, 07:43 PM - Thread Starter
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Originally Posted by jorgebetancourt View Post
You know I myself I'm still trying to figure this out.. When I switch from bt2020 to hdr is it noticeable? I dont notice anything but I'll try again next time I turn on the projector.. How much brightness do you gain?
The change in color is easier to spot. In thor ragnarok when e returns to asgard, use the flower arrangements as a good example for the effect of the P3 filter.

The resync makes the change in brightness harder to see. I have not measured the difference.
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post #10512 of 12895 Old 01-24-2019, 08:11 PM
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How much brightness do you gain?
Typically around 15-20%.

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post #10513 of 12895 Old 01-25-2019, 03:14 AM
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Apologies for the delays in updating. Quite the little list of folk with duff lamp iris mechs now.


Current list of users with failed irises:

@bobof UK, X7900, Fail 22/Jul/2018 @ 95hrs, Manuf April 2018, SN 09340455, REPLACED
https://www.avsforum.com/forum/24-di...l#post56524896

@TKNice US, ?, Fail ?? @ a few hundred hrs, Manuf ?, SN ?, REPLACED
https://www.avsforum.com/forum/24-di...l#post56499926

@br0d0 Australia, X7900, Fail 14/Jul/2018 @ 52hrs, Manuf Jan 2018, SN 06340278, REPAIRED
https://www.avsforum.com/forum/24-di...l#post56488090

@coxy2416 Canada, X790, Fail 20/May/2018 @ 20hrs, Manuf April 2018, SN 09340399, REPLACED
https://www.avsforum.com/forum/24-di...l#post56525152

@JJ7 USA, RS540, Fail 29/Dec/2017 @ 20hrs, Manuf Nov 2017, SN 162402xx, REPLACED
https://www.avsforum.com/forum/24-di...l#post55396160

@ScottAvery US, RS540, Fail 25/Jul/2018 @ 134hrs, Manuf ?, SN ?, failure hasn't stuck hard like most
https://www.avsforum.com/forum/24-di...l#post56540012

@BdoUK , USA, RS540, Fail 21/Sept/2018 @ 350hrs, Manuf Jan 2018, SN 06340302, REPLACED https://www.avsforum.com/forum/24-di...l#post56847266

@jackshi , ?, RS540, Fail @ 1week old, Manuf?, SN?, REPLACED, https://www.avsforum.com/forum/24-di...l#post56847666

@jwhart , USA, X990, 250 hrs, Manuf April 2018, SN 09340254, REPLACED https://www.avsforum.com/forum/24-di...l#post57200020

@rlarsen462 , USA, X990, 1145 hrs, Manuf Oct 2017, SN 15240047, Outcome?, https://www.avsforum.com/forum/24-di...l#post57257192

@Rob_in_NorCal , USA, X990, Fail 01/20/19 @ 96 hrs, Manuf March 2018, SN 08340324, SENT FOR REPAIR, https://www.avsforum.com/forum/24-di...l#post57466694


@rlarsen462 did you get an outcome?

Doesn't look to be any strong correlation; however it is noteworthy there are no failures recorded of units post manufactured in April 2018. It is possible there aren't units post this date in existence (I don't have access to serials, perhaps they've been selling old stocks) or it is possible it got fixed. If that is the case I'm a bit annoyed as the replacement I was sent was actually older than the one that failed (poor stock rotation at distributor I guess, unless it was rework stock, but was new and sealed). At the very least it is ammo if the iris dies and there is question over warranty coverage.

Are there serial numbers higher than starting with 0934 in the wild? It is quite possible the serial number gaps above represent months where production was scaled back for lack of demand or availability of components.

It would be quite "interesting" to start up a serial number registry of these products.
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Last edited by bobof; 01-25-2019 at 08:47 AM.
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post #10514 of 12895 Old 01-25-2019, 03:25 AM
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Quote:
Originally Posted by Bytehoven View Post
The change in color is easier to spot. In thor ragnarok when e returns to asgard, use the flower arrangements as a good example for the effect of the P3 filter.

The resync makes the change in brightness harder to see. I have not measured the difference.
The best example I've seen so far have been the red spikes on the Klingon armour in Startrek Discovery on Netflix. They're muddy brownish on SDR, and a super luscious deep red in HDR.
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post #10515 of 12895 Old 01-25-2019, 04:01 AM
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Typically around 15-20%.
Damn that's a lot.. thanks

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post #10516 of 12895 Old 01-25-2019, 04:02 AM
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Originally Posted by Bytehoven View Post
Your peak lumen output will drop, but contrast performance will increase. How is your current setup as far as image brightness for sdr and hdr content?

Given the excellent contrast on these projectors, placing the unit as close as possible gets you max lumens on the screen, while contrast performance is still very good.

Also keep in mind as the lamp ages tge lumen output drops, so if the longer throw is right on the edge for image brightness, it will get worse, needing you to run high lamp sooner or more often.
Previously we had a RS56 now gone (sold) and the throw distance was 13', it was not really calibrated but only visual corrections to taste, the lens aperture (optical iris) was set to -7 and the lamp only had 275 hours, no hdr of course

One reason to relocate the new one is because of the room configuration I have a custom made mount hanging under a roof wooden beam and it is not that easy to attach the projector (weight) but also quite difficult to adjust it precisely, in the attic it would simply sit on a shelf. One aother reason is heat, here in the south it gets hot in summer under the roof where my room is ( mezzanine) with no need to add more heat from the projector. But the main reason is projector noises especially if I have to use high lamp mode in the future ( HDR ? ), we really appreciate watching films without as little noisy distractions as possible.
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post #10517 of 12895 Old 01-25-2019, 04:20 AM
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The best example I've seen so far have been the red spikes on the Klingon armour in Startrek Discovery on Netflix. They're muddy brownish on SDR, and a super luscious deep red in HDR.
Actually scratch that, it is BS, as the filter is only in the green channel on these units. That is just the result of unchaining the native red gamut from 709 targets.

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post #10518 of 12895 Old 01-25-2019, 07:19 AM
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Doesn't look to be any strong correlation; however it is noteworthy there are no failures recorded of units post manufactured in April 2018. It is possible there aren't units post this date in existence (I don't have access to serials, perhaps they've been selling old stocks) or it is possible it got fixed. If that is the case I'm a bit annoyed as the replacement I was sent was actually older than the one that failed (poor stock rotation at distributor I guess, unless it was rework stock, but was new and sealed). At the very least it is ammo if the iris dies and there is question over warranty coverage.

Are there serial numbers higher than starting with 0934 in the wild? It is quite possible the serial number gaps above represent months where production was scaled back for lack of demand or availability of components.

It would be quite "interesting" to start up a serial number registry of these products.
Yes, there are units with serials that are dated after April 2018. I had my first unit replaced due to a major damage during shipping. The replacement unit was manufactured in August 2018 and my original unit was manufactured in June/July (can't remember exactly).
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post #10519 of 12895 Old 01-25-2019, 07:30 AM
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Quote:
Originally Posted by bobof View Post
Apologies for the delays in updating. Quite the little list of folk with duff lamp iris mechs now.


Current list of users with failed irises:

@bobof UK, X7900, Fail 22/Jul/2018 @ 95hrs, Manuf April 2018, SN 09340455, REPLACED
https://www.avsforum.com/forum/24-di...l#post56524896

@TKNice US, ?, Fail ?? @ a few hundred hrs, Manuf ?, SN ?, REPLACED
https://www.avsforum.com/forum/24-di...l#post56499926

@br0d0 Australia, X7900, Fail 14/Jul/2018 @ 52hrs, Manuf Jan 2018, SN 06340278, REPAIRED
https://www.avsforum.com/forum/24-di...l#post56488090

@coxy2416 Canada, X790, Fail 20/May/2018 @ 20hrs, Manuf April 2018, SN 09340399, REPLACED
https://www.avsforum.com/forum/24-di...l#post56525152

@JJ7 USA, RS540, Fail 29/Dec/2017 @ 20hrs, Manuf Nov 2017, SN 162402xx, REPLACED
https://www.avsforum.com/forum/24-di...l#post55396160

@ScottAvery US, RS540, Fail 25/Jul/2018 @ 134hrs, Manuf ?, SN ?, failure hasn't stuck hard like most
https://www.avsforum.com/forum/24-di...l#post56540012

@BdoUK , USA, RS540, Fail 21/Sept/2018 @ 350hrs, Manuf Jan 2018, SN 06340302, REPLACED https://www.avsforum.com/forum/24-di...l#post56847266

@jackshi , ?, RS540, Fail @ 1week old, Manuf?, SN?, REPLACED, https://www.avsforum.com/forum/24-di...l#post56847666

@jwhart , USA, X990, 250 hrs, Manuf April 2018, SN 09340254, REPLACED https://www.avsforum.com/forum/24-di...l#post57200020

@rlarsen462 , USA, X990, 1145 hrs, Manuf Oct 2017, SN 15240047, Outcome?, https://www.avsforum.com/forum/24-di...l#post57257192
@Rob_in_NorCal , USA, X990, Fail 01/20/19 @ 96 hrs, Manuf March 2018, SN 08340324, SENT FOR REPAIR, https://www.avsforum.com/forum/24-di...l#post57466694[/QUOTE]


@rlarsen462 did you get an outcome?

Doesn't look to be any strong correlation; however it is noteworthy there are no failures recorded of units post manufactured in April 2018. It is possible there aren't units post this date in existence (I don't have access to serials, perhaps they've been selling old stocks) or it is possible it got fixed. If that is the case I'm a bit annoyed as the replacement I was sent was actually older than the one that failed (poor stock rotation at distributor I guess, unless it was rework stock, but was new and sealed). At the very least it is ammo if the iris dies and there is question over warranty coverage.

Are there serial numbers higher than starting with 0934 in the wild? It is quite possible the serial number gaps above represent months where production was scaled back for lack of demand or availability of components.

It would be quite "interesting" to start up a serial number registry of these products.[/QUOTE]

My replacment unit has a serial number starting "1524" so it was manufactured in October 2018. It's scheduled to be installed next Wednesday 1/30/19.

Question: Do any of you have a suggested "torture test" to confirm that the new unit is OK? I was thinking just changing the iris to manual and changing the setting should suffice; comments?
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post #10520 of 12895 Old 01-25-2019, 07:45 AM
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My replacment unit has a serial number starting "1524" so it was manufactured in October 2018. It's scheduled to be installed next Wednesday 1/30/19.

Question: Do any of you have a suggested "torture test" to confirm that the new unit is OK? I was thinking just changing the iris to manual and changing the setting should suffice; comments?
I take it you mean 1534 not 24?

I'm guessing here, but in my opinion it seems the issue is down to some bogus logic in the motor drive.
I think what got mine was having the iris set to -9 for SDR, 0 for HDR, and starting / stopping HDR before the iris had fully moved from one position to the next. It seems like perhaps it sometimes doesn't come to a stop before banging it into reverse gear. I'd give something like that a go repeatedly.

The annoying thing is I'm sure if I try I'll manage to break mine by doing the above. Do I do that and go through the pain of getting a new unit, or baby it and use it in a way which doesn't stress the iris mech?

There is at least one other problem with the motor drive logic it seems going by my "new" replacement early 2018 unit - if you switch the unit off with HDR content being played (iris at, say 0), and turn the unit back on with SDR being input, you won't it seems hear the iris move back to the SDR position. But the projector thinks the iris is in the correct position for SDR (it isn't). So what you'll hear the next time you try and enable HDR mode is a nasty noise as the motor bounces off the end of the iris mech. Nasty.

Has anyone else noticed this?
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post #10521 of 12895 Old 01-25-2019, 08:03 AM
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Originally Posted by bobof View Post
Apologies for the delays in updating. Quite the little list of folk with duff lamp iris mechs now.


Current list of users with failed irises:

@bobof UK, X7900, Fail 22/Jul/2018 @ 95hrs, Manuf April 2018, SN 09340455, REPLACED
https://www.avsforum.com/forum/24-di...l#post56524896

@TKNice US, ?, Fail ?? @ a few hundred hrs, Manuf ?, SN ?, REPLACED
https://www.avsforum.com/forum/24-di...l#post56499926

@br0d0 Australia, X7900, Fail 14/Jul/2018 @ 52hrs, Manuf Jan 2018, SN 06340278, REPAIRED
https://www.avsforum.com/forum/24-di...l#post56488090

@coxy2416 Canada, X790, Fail 20/May/2018 @ 20hrs, Manuf April 2018, SN 09340399, REPLACED
https://www.avsforum.com/forum/24-di...l#post56525152

@JJ7 USA, RS540, Fail 29/Dec/2017 @ 20hrs, Manuf Nov 2017, SN 162402xx, REPLACED
https://www.avsforum.com/forum/24-di...l#post55396160

@ScottAvery US, RS540, Fail 25/Jul/2018 @ 134hrs, Manuf ?, SN ?, failure hasn't stuck hard like most
https://www.avsforum.com/forum/24-di...l#post56540012

@BdoUK , USA, RS540, Fail 21/Sept/2018 @ 350hrs, Manuf Jan 2018, SN 06340302, REPLACED https://www.avsforum.com/forum/24-di...l#post56847266

@jackshi , ?, RS540, Fail @ 1week old, Manuf?, SN?, REPLACED, https://www.avsforum.com/forum/24-di...l#post56847666

@jwhart , USA, X990, 250 hrs, Manuf April 2018, SN 09340254, REPLACED https://www.avsforum.com/forum/24-di...l#post57200020

@rlarsen462 , USA, X990, 1145 hrs, Manuf Oct 2017, SN 15240047, Outcome?, https://www.avsforum.com/forum/24-di...l#post57257192
@Rob_in_NorCal , USA, X990, Fail 01/20/19 @ 96 hrs, Manuf March 2018, SN 08340324, SENT FOR REPAIR, https://www.avsforum.com/forum/24-di...l#post57466694[/QUOTE]


@rlarsen462 did you get an outcome?

Doesn't look to be any strong correlation; however it is noteworthy there are no failures recorded of units post manufactured in April 2018. It is possible there aren't units post this date in existence (I don't have access to serials, perhaps they've been selling old stocks) or it is possible it got fixed. If that is the case I'm a bit annoyed as the replacement I was sent was actually older than the one that failed (poor stock rotation at distributor I guess, unless it was rework stock, but was new and sealed). At the very least it is ammo if the iris dies and there is question over warranty coverage.

Are there serial numbers higher than starting with 0934 in the wild? It is quite possible the serial number gaps above represent months where production was scaled back for lack of demand or availability of components.

It would be quite "interesting" to start up a serial number registry of these products.[/QUOTE]

[QUOTE=bobof;57497084]I take it you mean 1534 not 24?

That's correct, 1524.
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post #10522 of 12895 Old 01-25-2019, 08:20 AM
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Originally Posted by Dominic Chan View Post
On my x750 the green does not quite hit Rec709 (and apparently bobof found the same). If you create the custom Rec709F profile the gamut will not go beyond the defined gamut.
Indeed, seems that my unit doesn't hit REC709 green without the filter, so at the moment I'm running Reference mode for SDR with a 3DLUT to take the now wider than 709 gamut back down to REC709.
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post #10523 of 12895 Old 01-25-2019, 08:24 AM
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That's correct, 1524.
1524 or 1534?! 1524 would be Oct 17. 1534 would be Oct 18.
If it really is 1524 I guess it is a refurb.
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post #10524 of 12895 Old 01-25-2019, 08:35 AM
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Quote:
Originally Posted by bobof View Post
Apologies for the delays in updating. Quite the little list of folk with duff lamp iris mechs now.


Current list of users with failed irises:

@bobof UK, X7900, Fail 22/Jul/2018 @ 95hrs, Manuf April 2018, SN 09340455, REPLACED
https://www.avsforum.com/forum/24-di...l#post56524896

@TKNice US, ?, Fail ?? @ a few hundred hrs, Manuf ?, SN ?, REPLACED
https://www.avsforum.com/forum/24-di...l#post56499926

@br0d0 Australia, X7900, Fail 14/Jul/2018 @ 52hrs, Manuf Jan 2018, SN 06340278, REPAIRED
https://www.avsforum.com/forum/24-di...l#post56488090

@coxy2416 Canada, X790, Fail 20/May/2018 @ 20hrs, Manuf April 2018, SN 09340399, REPLACED
https://www.avsforum.com/forum/24-di...l#post56525152

@JJ7 USA, RS540, Fail 29/Dec/2017 @ 20hrs, Manuf Nov 2017, SN 162402xx, REPLACED
https://www.avsforum.com/forum/24-di...l#post55396160

@ScottAvery US, RS540, Fail 25/Jul/2018 @ 134hrs, Manuf ?, SN ?, failure hasn't stuck hard like most
https://www.avsforum.com/forum/24-di...l#post56540012

@BdoUK , USA, RS540, Fail 21/Sept/2018 @ 350hrs, Manuf Jan 2018, SN 06340302, REPLACED https://www.avsforum.com/forum/24-di...l#post56847266

@jackshi , ?, RS540, Fail @ 1week old, Manuf?, SN?, REPLACED, https://www.avsforum.com/forum/24-di...l#post56847666

@jwhart , USA, X990, 250 hrs, Manuf April 2018, SN 09340254, REPLACED https://www.avsforum.com/forum/24-di...l#post57200020

@rlarsen462 , USA, X990, 1145 hrs, Manuf Oct 2017, SN 15240047, Outcome?, https://www.avsforum.com/forum/24-di...l#post57257192
@Rob_in_NorCal , USA, X990, Fail 01/20/19 @ 96 hrs, Manuf March 2018, SN 08340324, SENT FOR REPAIR, https://www.avsforum.com/forum/24-di...l#post57466694[/QUOTE]


@rlarsen462 did you get an outcome?

Quote:
Doesn't look to be any strong correlation; however it is noteworthy there are no failures recorded of units post manufactured in April 2018. It is possible there aren't units post this date in existence (I don't have access to serials, perhaps they've been selling old stocks) or it is possible it got fixed. If that is the case I'm a bit annoyed as the replacement I was sent was actually older than the one that failed (poor stock rotation at distributor I guess, unless it was rework stock, but was new and sealed). At the very least it is ammo if the iris dies and there is question over warranty coverage.

Are there serial numbers higher than starting with 0934 in the wild? It is quite possible the serial number gaps above represent months where production was scaled back for lack of demand or availability of components.

It would be quite "interesting" to start up a serial number registry of these products.
I spoke with the tech rep and he confirmed that it was failed over the phone by my description, said they did have a supposedly updated part for it. Determined I wasn't willing to gamble on a replacement unit as this one is pretty solid, so unfortunately that means pulling it down and sending it to Long Beach for repair. I haven't had the opportunity to plan for 3 weeks+ of projector downtime so I haven't sent it in yet. Probably will go out some time in February, then I just have to hope the shipping there and back doesn't result in further damage.
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post #10525 of 12895 Old 01-25-2019, 08:38 AM
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Quote:
Originally Posted by bobof View Post
I take it you mean 1534 not 24?

I'm guessing here, but in my opinion it seems the issue is down to some bogus logic in the motor drive.
I think what got mine was having the iris set to -9 for SDR, 0 for HDR, and starting / stopping HDR before the iris had fully moved from one position to the next. It seems like perhaps it sometimes doesn't come to a stop before banging it into reverse gear. I'd give something like that a go repeatedly.

The annoying thing is I'm sure if I try I'll manage to break mine by doing the above. Do I do that and go through the pain of getting a new unit, or baby it and use it in a way which doesn't stress the iris mech?

There is at least one other problem with the motor drive logic it seems going by my "new" replacement early 2018 unit - if you switch the unit off with HDR content being played (iris at, say 0), and turn the unit back on with SDR being input, you won't it seems hear the iris move back to the SDR position. But the projector thinks the iris is in the correct position for SDR (it isn't). So what you'll hear the next time you try and enable HDR mode is a nasty noise as the motor bounces off the end of the iris mech. Nasty.

Has anyone else noticed this?
I suspect the same issue...I had my SDR set for -5 and some UHD Blu-Rays have this annoying habit of flip flopping back and forth between HDR and SDR quickly during the menu sequences. Wouldn't be surprised if that's what did mine in.
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post #10526 of 12895 Old 01-25-2019, 08:39 AM
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Originally Posted by bobof View Post
1524 or 1534?! 1524 would be Oct 17. 1534 would be Oct 18.
If it really is 1524 I guess it is a refurb.
JVC told my dealer that as long as there was new stock available, the replacement would be new. Also, despite my earlier assumptions regarding the alpha in the model numbers, I've now debunked that. The model number on the shipping carton is "DLA-X990RB" and on the unit is "DLA-X990RBK" so there's NO indication that I can identify. As long as the picture quality is up to par and it doesn't have the iris issues, I'll be satisfied.
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post #10527 of 12895 Old 01-25-2019, 08:51 AM
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Apologies all for the bbcode disaster in my list which had lots of hidden backslash quotes in it, it has made a right pig's ear of some of your replies. Am nursing a flu at the mo, should probably just go back to bed!
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post #10528 of 12895 Old 01-25-2019, 09:08 AM
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Quote:
Originally Posted by bobof View Post
I take it you mean 1534 not 24?

I'm guessing here, but in my opinion it seems the issue is down to some bogus logic in the motor drive.
I think what got mine was having the iris set to -9 for SDR, 0 for HDR, and starting / stopping HDR before the iris had fully moved from one position to the next. It seems like perhaps it sometimes doesn't come to a stop before banging it into reverse gear. I'd give something like that a go repeatedly.

The annoying thing is I'm sure if I try I'll manage to break mine by doing the above. Do I do that and go through the pain of getting a new unit, or baby it and use it in a way which doesn't stress the iris mech?

There is at least one other problem with the motor drive logic it seems going by my "new" replacement early 2018 unit - if you switch the unit off with HDR content being played (iris at, say 0), and turn the unit back on with SDR being input, you won't it seems hear the iris move back to the SDR position. But the projector thinks the iris is in the correct position for SDR (it isn't). So what you'll hear the next time you try and enable HDR mode is a nasty noise as the motor bounces off the end of the iris mech. Nasty.

Has anyone else noticed this?
I reported something similar previously. If I turn mine off in HDR mode with iris at 0, it makes a bad iris noise the next time I power it on. This is fixed by either turning it off in SDR which is set to - 14, or change HDR to - 1 or less.
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post #10529 of 12895 Old 01-25-2019, 09:11 AM
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Indeed, seems that my unit doesn't hit REC709 green without the filter, so at the moment I'm running Reference mode for SDR with a 3DLUT to take the now wider than 709 gamut back down to REC709.
Not sure why there’s so much unit-to-unit variation. Some RS440 owners reported close to P3 green.

I don’t have 3DLUT; the custom profile with filter works well (enough for me).
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JVC DLA-NX7; Denon AVR-X3400H; HD Fury Vertex; ATV4K; Fire TV Cube
JVC Projector Bright Curves; Optimizing HDR;
Creating a basic HDR curve using Arve’s Tool;
Replacing JVC Bare Bulbs

Last edited by Dominic Chan; 01-25-2019 at 09:17 AM.
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post #10530 of 12895 Old 01-25-2019, 10:00 AM
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Not sure why there’s so much unit-to-unit variation. Some RS440 owners reported close to P3 green.

I don’t have 3DLUT; the custom profile with filter works well (enough for me).
I guess there are a few possibilities:
1) differences in the coloured polariser behaviours
2) difference in the lamp spectrum

Both my X7900's have been very similar, but when I had an X3 followed by an X30 the X30 measured quite a bit wider on the same meter.
I'd love to know a bit more about the internal setup of the 440 vs 540 and whether the native gamut of the 440 light engine is a bit wider than the unfiltered gamut of the 540, at the cost of a little light output. It is feasible I guess.
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