How to upgrade JVC DLA X3/X500/X5000 with the missing second iris - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 3Likes
  • 1 Post By ((( atom )))
  • 1 Post By Slonopot
  • 1 Post By Slonopot
 
Thread Tools
post #1 of 28 Old 04-30-2019, 06:50 AM - Thread Starter
Member
 
((( atom )))'s Avatar
 
Join Date: Jan 2010
Posts: 75
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 38 Post(s)
Liked: 28
Adding the missing second iris to JVC DLA X3/X500/X5000

Hi,

JVC traditionally excludes the second iris from the entry-level projectors. X3, X500 and X5000 are missing them, where X7, X700 and X7000 do have them. The second iris dramatically improves the contrast of these devices (up to twice the value) and is mostly the largest difference between the small and next-larger models. When looking at the price-tags this is somewhat disturbing.

I once came across the picture of the second iris and opened up my X3 to see, if I can fit this thing in there by myself an found it to be a rather easy task. I then did this with my new projector, X500 and had no problems with it as well. I equipped a friends RS40 with it and just now wrote a small guide for another friend that lives kind of too far away to help him out by myself. The instructions are in German, but if there is enough interest, I could translate it to English. Anyway, the pictures show most of the process.

Original German version:
https://docs.google.com/document/d/1...it?usp=sharing

English version:
https://docs.google.com/document/d/1...it?usp=sharing

Have fun!

---

Changed the title, because it looked like a question.
descalabro likes this.

Last edited by ((( atom ))); 05-01-2019 at 05:45 AM.
((( atom ))) is offline  
Sponsored Links
Advertisement
 
post #2 of 28 Old 04-30-2019, 01:53 PM
AVS Forum Special Member
 
k3nnis's Avatar
 
Join Date: Jun 2002
Posts: 1,176
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 642 Post(s)
Liked: 60
Thanks! Yes please for English version

Also will this work on x35?


Sent from my iPhone using Tapatalk
k3nnis is offline  
post #3 of 28 Old 04-30-2019, 02:13 PM
AVS Forum Addicted Member
 
coderguy's Avatar
 
Join Date: Dec 2006
Posts: 14,027
Mentioned: 62 Post(s)
Tagged: 0 Thread(s)
Quoted: 2420 Post(s)
Liked: 1315
Nice write up...

I'm not sure it would be worth all this trouble and risk to double the contrast, tripling it might be another story.
Doubling the contrast isn't as dramatic in viewing as it sounds.

**Updated Projector Calculator Released NOV 2017**
-- www.webprojectorcalculator.com --
coderguy is offline  
Sponsored Links
Advertisement
 
post #4 of 28 Old 05-01-2019, 05:05 AM - Thread Starter
Member
 
((( atom )))'s Avatar
 
Join Date: Jan 2010
Posts: 75
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 38 Post(s)
Liked: 28
It is. I cannot even tell you the exact numbers, because I never bothered to measure it before, but I turned my X3 on after the mod and it made a major difference, visually. I have a retroflective screen (old DaLite) and especially my black levels were annoying before, there was just no proper black. That got satisfying tor the first time since I had this projector. When I got the X500 I didn't even set it up before inserting the second iris. Took me maybe 20 minutes.

For the risk: If you never opened up any device you should definitely not start with that one, but if you are a little experienced with this sort of thing there isn't much that can go wrong actually, since you only remove lids and covers.

X35 comes without the second iris.
((( atom ))) is offline  
post #5 of 28 Old 05-01-2019, 05:46 AM - Thread Starter
Member
 
((( atom )))'s Avatar
 
Join Date: Jan 2010
Posts: 75
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 38 Post(s)
Liked: 28
Translated the guide to english and took out the "double the contrast" figure, since it is not based on a measurement and might be wrong. English guide linked in the original post.
((( atom ))) is offline  
post #6 of 28 Old 05-01-2019, 06:34 AM
AVS Forum Special Member
 
k3nnis's Avatar
 
Join Date: Jun 2002
Posts: 1,176
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 642 Post(s)
Liked: 60
Thanks. I’m too scared to try on my x35 at the moment


Sent from my iPhone using Tapatalk
k3nnis is offline  
post #7 of 28 Old 05-01-2019, 02:41 PM
AVS Forum Addicted Member
 
coderguy's Avatar
 
Join Date: Dec 2006
Posts: 14,027
Mentioned: 62 Post(s)
Tagged: 0 Thread(s)
Quoted: 2420 Post(s)
Liked: 1315
Quote:
Originally Posted by ((( atom ))) View Post
Translated the guide to english and took out the "double the contrast" figure, since it is not based on a measurement and might be wrong. English guide linked in the original post.
Thanks, sounds like it might be worth a try then, you've maybe convinced me

**Updated Projector Calculator Released NOV 2017**
-- www.webprojectorcalculator.com --
coderguy is offline  
post #8 of 28 Old 05-01-2019, 02:44 PM
AVS Forum Special Member
 
k3nnis's Avatar
 
Join Date: Jun 2002
Posts: 1,176
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 642 Post(s)
Liked: 60
Quote:
Originally Posted by coderguy View Post
Thanks, sounds like it might be worth a try then, you've maybe convinced me


Which projector do you have ?


Sent from my iPhone using Tapatalk
k3nnis is offline  
post #9 of 28 Old 05-01-2019, 02:46 PM
AVS Forum Addicted Member
 
coderguy's Avatar
 
Join Date: Dec 2006
Posts: 14,027
Mentioned: 62 Post(s)
Tagged: 0 Thread(s)
Quoted: 2420 Post(s)
Liked: 1315
Same as you - X30 (RS-45), I just had to order a new bulb though, hoping I don't have a ballast issue.
Never had a ballast issue, but I just get worried every time a bulb fails

**Updated Projector Calculator Released NOV 2017**
-- www.webprojectorcalculator.com --

Last edited by coderguy; 05-01-2019 at 03:55 PM.
coderguy is offline  
post #10 of 28 Old 05-01-2019, 03:53 PM
AVS Forum Special Member
 
k3nnis's Avatar
 
Join Date: Jun 2002
Posts: 1,176
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 642 Post(s)
Liked: 60
Quote:
Originally Posted by coderguy View Post
Same as you - X35 (RS-45), I just had to order a new bulb though, hoping I don't have a ballast issue.

Never had a ballast issue, but I just get worried every time a bulb fails


Oh ok

Do you mean RS-46? I think x35 is a rs46 and x30 is a rs45

I may be wrong though....

Good luck!


Sent from my iPhone using Tapatalk
k3nnis is offline  
post #11 of 28 Old 05-01-2019, 03:55 PM
AVS Forum Addicted Member
 
coderguy's Avatar
 
Join Date: Dec 2006
Posts: 14,027
Mentioned: 62 Post(s)
Tagged: 0 Thread(s)
Quoted: 2420 Post(s)
Liked: 1315
Quote:
Originally Posted by k3nnis View Post
Oh ok

Do you mean RS-46? I think x35 is a rs46 and x30 is a rs45

I may be wrong though....

Good luck!


Sent from my iPhone using Tapatalk
You are correct, sorry I mean the x30 (typed two 5's instead of one).

**Updated Projector Calculator Released NOV 2017**
-- www.webprojectorcalculator.com --
coderguy is offline  
post #12 of 28 Old 05-01-2019, 03:56 PM
AVS Forum Special Member
 
k3nnis's Avatar
 
Join Date: Jun 2002
Posts: 1,176
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 642 Post(s)
Liked: 60
Quote:
Originally Posted by coderguy View Post
You are correct, sorry I mean the x30 (typed two 5's instead of one).


If you do try it let us know how you go


Sent from my iPhone using Tapatalk
k3nnis is offline  
post #13 of 28 Old 06-06-2019, 08:09 PM
Member
 
Join Date: Mar 2018
Posts: 42
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 26 Post(s)
Liked: 1
I just replaced the ballast on my X500, had I known about this, I would've given it a try at the same time! Might still do it anyway though

Thanks for the guide atom!


Just one observation: if you are getting 20% brigthness reduction by fabricating and installing the second iris, does that mean that the higher end JVC's that already have this second iris factory built-in also have a brighter bulb? From memory the lumens output between the lower and higher-end JVC's is similar. So given this, you would expect the higher end JVC's to have increased lamp output given the presence of the second iris... or am I seeing this wrong?
Tukkae is online now  
post #14 of 28 Old 06-12-2019, 09:46 PM
Member
 
Join Date: Jul 2016
Posts: 124
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
Liked: 22
Look CAREFULLY within the younger lines (X3,30,35) and compare with the models X7,9,70,90,75,95.
With a careful comparison, you can easily find a second fan in older projectors. Which brings cooling air just to the part where the second diaphragm is located. This is done in order to eliminate overheating.
In addition, the second diaphragm must be adjustable. Homemade naturally can not.

Hence further problems arise.
descalabro likes this.
Slonopot is online now  
post #15 of 28 Old 06-12-2019, 10:00 PM
Member
 
Join Date: Jul 2016
Posts: 124
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
Liked: 22
If you make a second diaphragm for younger projectors, then you need to purchase a second fan, remove two plugs that are located: 1 at the air inlet where the filter is located, 2 at the optical path itself.
But the problem with brightness when the lamp is worn will remain. Because a homemade diaphragm is not adjustable.
descalabro likes this.
Slonopot is online now  
post #16 of 28 Old 06-18-2019, 11:43 AM - Thread Starter
Member
 
((( atom )))'s Avatar
 
Join Date: Jan 2010
Posts: 75
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 38 Post(s)
Liked: 28
Surely it will get darker but in my experience the gain in contrast makes up for that very well. An X7 is less bright than an X3 and a X700 less bright than an X500 out of the box. The reason is the second iris. JVC believes the second iris improves the picture so mucht, that it is worth the loss of light and a higher price. I do to.

I installed the second iris in an X500 as well as in two X3s with no additional fan. I did not have any trouble so far and I use both low and high lamp modes.

The lid that is above the iris has an air outlet from which hot air is blown out. I did not see any place for another fan and I would be surprised to find the need of one to be true. I took apart the entire optical block of my X3 and I should have noticed. So if there is more information on that topic please let me know.

Last edited by ((( atom ))); 06-18-2019 at 12:12 PM.
((( atom ))) is offline  
post #17 of 28 Old 06-18-2019, 11:46 AM - Thread Starter
Member
 
((( atom )))'s Avatar
 
Join Date: Jan 2010
Posts: 75
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 38 Post(s)
Liked: 28
Forgot: I made several irises to find the best spot between light loss and contrast. I stood on the conservative side and can still use the front iris for adjustments, so there is not really a problem.

Gesendet von meinem SM-G900F mit Tapatalk
((( atom ))) is offline  
post #18 of 28 Old 06-18-2019, 12:48 PM
Member
 
Join Date: Jul 2016
Posts: 124
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
Liked: 22
No one is against your enthusiasm with the second iris. I'm just saying that the manufacturer puts a second fan (next to the first big one) for a reason. This second fan blows just between the hatch you are talking about and the light output of the lamp itself.
Easier to show on the photo. Yellow marked the second fan, which is not on X3,30,35 ......
The second is only on X7-95, etc.
Attached Thumbnails
Click image for larger version

Name:	Vergleichsspecial_clip_image022.jpg
Views:	22
Size:	70.2 KB
ID:	2581686  
Slonopot is online now  
post #19 of 28 Old 06-18-2019, 01:03 PM
Member
 
Join Date: Jul 2016
Posts: 124
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
Liked: 22
At X3.30 ...... there are places for the installation of a second fan. They are closed with metal bright plates (near the large first fan at its foot, and on the optical unit). Take a close look at your projector.

Without a second fan with a second iris, the case described on the last pages in the X35 thread may occur. Read and see there the photo of the glass, how it burned.
Slonopot is online now  
post #20 of 28 Old 06-18-2019, 01:32 PM - Thread Starter
Member
 
((( atom )))'s Avatar
 
Join Date: Jan 2010
Posts: 75
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 38 Post(s)
Liked: 28
I will take a look at that.
((( atom ))) is offline  
post #21 of 28 Old 06-18-2019, 01:40 PM
Member
 
Join Date: Jul 2016
Posts: 124
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
Liked: 22
These plates are circled in yellow:
Attached Thumbnails
Click image for larger version

Name:	956818w.jpg
Views:	23
Size:	152.7 KB
ID:	2581720  
Slonopot is online now  
post #22 of 28 Old 06-18-2019, 04:18 PM - Thread Starter
Member
 
((( atom )))'s Avatar
 
Join Date: Jan 2010
Posts: 75
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 38 Post(s)
Liked: 28
Thx, which model is that?
((( atom ))) is offline  
post #23 of 28 Old 06-18-2019, 10:40 PM
Member
 
Join Date: Jul 2016
Posts: 124
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
Liked: 22
JVC X3. All younger models (X3-35 ....) have a similar structure, the plates are arranged in the same way.
Slonopot is online now  
post #24 of 28 Old 06-19-2019, 12:27 AM - Thread Starter
Member
 
((( atom )))'s Avatar
 
Join Date: Jan 2010
Posts: 75
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 38 Post(s)
Liked: 28
OK, saw the first photo just now, my phone did not display it for some reason. There is quite a large fan there, yes. I will look into that.

You are writing that only the older models X3... have this additional fan. So are you saying that the newer models use the same cooling for all models within a range or do you simply only know for sure with the older ones?
((( atom ))) is offline  
post #25 of 28 Old 06-19-2019, 01:10 AM
Member
 
Join Date: Jul 2016
Posts: 124
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
Liked: 22
All X models that have a second iris have an additional second fan.
The younger X, such as 3,30,35 ..... there is no second iris, so there is no second fan. Therefore, the installation sites of this additional fan are covered with plates.
What is not clear here?
If you find such a fan, then it can be installed on any younger model, thereby reducing the risk of damage to the optical unit from temperature.
 

Last edited by Slonopot; 06-19-2019 at 01:13 AM.
Slonopot is online now  
post #26 of 28 Old 06-19-2019, 01:59 AM - Thread Starter
Member
 
((( atom )))'s Avatar
 
Join Date: Jan 2010
Posts: 75
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 38 Post(s)
Liked: 28
Quote:
Originally Posted by Slonopot View Post
All X models that have a second iris have an additional second fan.
This would be true for X3 as well as X500. Both do not have a second iris, while their bigger brothers do.

Quote:
Originally Posted by Slonopot View Post
The younger X, such as 3,30,35 ..... there is no second iris, so there is no second fan. Therefore, the installation sites of this additional fan are covered with plates.
This would differentiate between 'older' models like the X3 and 'newer' models like the X500.

So from the first sentence I understand that all X models without the second iris lack the additional fan.

In the second sentence firstly I assume you meant 'older' instead of younger, since the X3 is pretty old?
Then you suggest a difference between 'older' and 'younger' models and I don't understand what the difference could be, since you stated that all X models without the second iris do not have the additional fan.
((( atom ))) is offline  
post #27 of 28 Old 06-19-2019, 03:36 AM
Member
 
Join Date: Jul 2016
Posts: 124
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 69 Post(s)
Liked: 22
Under the younger models, I guess the lower, the first line. This is all X 3,30,35,500.
Under the older models are meant TOP.
This is X7-900.
Slonopot is online now  
post #28 of 28 Old 06-19-2019, 05:07 AM - Thread Starter
Member
 
((( atom )))'s Avatar
 
Join Date: Jan 2010
Posts: 75
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 38 Post(s)
Liked: 28
I guess we both mean the same.

When JVC releases a new line, it is always at 3 projectors at the same time. A line for example includes. X3/X7/X9 or X500/X700/X900. Older is the X3-X9 line, newer the line including X500-X900.
What all these lines seem to have in common is, that always the projector with the smalles number does not have the second iris (X3, X500 and so on).

Like that?

Well, thx for the hint, anyway, I will see, that I get hands on these fans right away.
((( atom ))) is offline  
Sponsored Links
Advertisement
 
Reply Digital Hi-End Projectors - $3,000+ USD MSRP

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off