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Please post experience of JVC HD750/350/550/950 bulb lifetime / lamp brightness drop - Page 24

post #691 of 738
9/19/11 at 7:48am
My RS20 has been in storage a year (lost my HT room in flood, thank God for ceiling mounts).

I just got it running and remembered this thread, but darned if I can find the "how to" part about getting to the lamp. Never replaced bulb, 1200 hours.

Is there a thread showing step by step how to get at the bulb and prism? I searched, but this thread is huge. Want to do it right the first time and not f**k anything up.

Also, do you replace the bulb alone, or does it come in a housing that you also replace?
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post #692 of 738
9/19/11 at 8:18am
Quote:
Originally Posted by Jeff Smith View Post
My RS20 has been in storage a year (lost my HT room in flood, thank God for ceiling mounts).

I just got it running and remembered this thread, but darned if I can find the "how to" part about getting to the lamp. Never replaced bulb, 1200 hours.

Is there a thread showing step by step how to get at the bulb and prism? I searched, but this thread is huge. Want to do it right the first time and not f**k anything up.

Also, do you replace the bulb alone, or does it come in a housing that you also replace?
You can download the User Manual from the website, and near the end of it is a detailed discussion of this. (And congrats on surviving the flood and getting your life back together!)
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post #693 of 738
9/19/11 at 8:54am
Bulb dimming is highly variable between different projectors and people's setups. As we know it's affected by numerous factors such as humidity, temperature, dirtyness of reflectors or lens parts, bulb design, dusty environment, etc...
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post #694 of 738
9/19/11 at 10:19am
Quote:
Originally Posted by Jeff Smith View Post

My RS20 has been in storage a year (lost my HT room in flood, thank God for ceiling mounts).

I just got it running and remembered this thread, but darned if I can find the "how to" part about getting to the lamp. Never replaced bulb, 1200 hours.

Is there a thread showing step by step how to get at the bulb and prism? I searched, but this thread is huge. Want to do it right the first time and not f**k anything up.

Also, do you replace the bulb alone, or does it come in a housing that you also replace?

Earlier in this thread - http://www.avsforum.com/avs-vb/showt...0#post19405330

Not a "how to" but what you might find inside. Removing the lamp assembly is discussed in the manual. Just be careful.

Jeff
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post #695 of 738
9/27/11 at 10:32am
My experience: excellent on the cleaning, both of the glass just in front of the bulb, as well as the more advanced internal cleaning as posted a few pages back by avzector and described at

http://www.avforums.com/forums/proje...-part-1-a.html

In advance, thanks all for discovering and posting clear instructions - without a doubt the best regular maintenance tweak to the visuals I have come across since calibration of grey scale.

Summary of results:
- I am on my second bulb and about 800 hours into it
- I replaced my first bulb after only about 800 hrs and was dissapointed with the improvement - likely my first bulb is fine, and the dirty glass/prism was the real issue I was trying to fix - fortunately I saved my first bulb as back up as there is probably some life left in it still
- I did not do a before and after measurement of ANSI or On/Off contrast ratio, but visually I would say on/off is not impacted, but ANSI definately is much improved visually (looking at white movie credits on black background)
- estimate of increase in brightness definately in 50% range - change in overall snap to the picture was very obvious for me
- initially I cleaned only just the glass in front of the bulb - there was a mild colour shift, and a large improvement in brightness and perceived ANSI
- this weekend, I took apart the projector and cleaned thoroughly the inside face of the glass as per link above, and the exposed sides on the other prisms/diffusors as best I could
- I did not notice any residue on the cleaning materials on either the external nor the internal cleaning, but cleaned anyway just using some standard camera lens cleaning fluid and wipes
- the glass the everyone is cleaning itself must have a anti-relective coating as it looked a tiny bit yellow under daylight flourescent lights- perhaps the cleaning allows for the anti glare/relection to work better?
- there was a very substantial and easily visible colour shift following the internal cleaning which surprised me as I was not expecting much difference
- Measurement of the post internal and external cleaning with Colorfacts showed the Red had dropped relative to Blue and Green by 20%, and dE was approx 40, instead of more typically following a good calibration dE of 0 to 2 or so (and where it was prior to cleaning)
- in essence the accumulated dirt/grime on the glass must be absorbing blue and green light, but less so for red, as well as scattering the light somewhat
- a quick fine tuning of the grey scale and gamma last night brought everything back in order and the picture improvement was fantastic - back to brand new again!

Thanks all, and I will try to do before and after on the next go around after around 500 more hours.

Dave
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post #696 of 738
10/10/11 at 1:14pm
I have a HD350 and just replaced the first bulb with 2200 hours on it. The lens on the bulb assembly was pretty melted. Or at least distorted looking. New bulb in, after wiping down the inside projector lens.
Is there a way to clean or replace the "glass/plastic?" on the bulb assembly? Is this something we want to touch?
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post #697 of 738
10/14/11 at 3:45pm
Quote:
Originally Posted by peter_vfr View Post

Well after reading about this issue I thought I might have a look at my relatively infrequently used HD-350 (about 500 hours).
I wasn't particularly disappointed with brightness levels but had it down for cleaning and this is what I found....

Hmmm, I'm sure the lens is not supposed to look like this!



At least, from this thread, it appears it's just the front glass element and not the globe itself. I'll probably still replace it anyway.

I also appear to be suffering from the fogging issue on the glass element.



I'll give it a clean when I get the chance to grab some clean microfibre cloths.
Also, I don't have any measuring equipment so can't give before/after readings, sorry.

Well I finally got around to pulling the PJ back down and giving the optical element and globe face a bit of clean.

Wow! What a huge difference in brightness!

If you open your JVC up and see something similar to mine, a quick wipe down with a microfibre cloth makes a huge difference. 8-)

PS> No measuring equipment so I can't quantify the change.
PPS> Still using the same globe with cracked front element (~500 hours)
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post #698 of 738
10/14/11 at 4:18pm
If you had a calibration, it needs to be re-done.
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post #699 of 738
10/29/11 at 9:05am
Decided to order a new bulb after only a little over 700 hours on original bulb (RS20). Although the picture was still acceptable, I had been noticing certain scenes being dark, especially indoor scenes. ALready cleaned the prism element next to the lamp. Well after getting the new lamp I needed to make sure it worked so I popped it in. What a difference. Was using high mode, full iris. Now using normal mode full iris. Looks exactly like I want it to. Boy do I wish the lamp would stay like that!
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post #700 of 738
10/29/11 at 1:53pm
Quote:
Originally Posted by dave1216 View Post

Decided to order a new bulb after only a little over 700 hours on original bulb (RS20). Although the picture was still acceptable, I had been noticing certain scenes being dark, especially indoor scenes. ALready cleaned the prism element next to the lamp. Well after getting the new lamp I needed to make sure it worked so I popped it in. What a difference. Was using high mode, full iris. Now using normal mode full iris. Looks exactly like I want it to. Boy do I wish the lamp would stay like that!

hmm.
I have a new lamp just sitting around waiting to pop in.
Unfortunately, do to install I have to take the projector down, so that's delaying me.
Still looks good in "high" mode, but you have me thinking...

Mike
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post #701 of 738
10/30/11 at 9:16am
Mike, I am amazed at how much more pop there is to the picture now. You lose track of exactly how the picture looked when you first got your projector, but I don't remember the picture ever looking this good. Watched Lion King yesterday and it looked fantastic. For me I spent about 7K for my RS20 so what is $300 every two years or so to make it look like new.

Dave
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post #702 of 738
10/30/11 at 2:30pm
The degradation is slow while the replacement's effect is immediate.

Jeff
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post #703 of 738
10/31/11 at 3:30pm
I replaced the original lamp in my RS20 back in January. After about 200 hours I cleaned the prism and noticed there was no residue like there always was with the original lamp. I cleaned the prism again last night after another 500 hours and it was still clean. Light measurement was 69 lux before cleaning and 71 after. This leads me to believe there was something offgassing in the original lamp/housing that was causing the residue.
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post #704 of 738
10/31/11 at 4:15pm
where are you guys getting your lamps with the RS20??? AND, are you buying just the bulb to save money, or the complete assembly?
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post #705 of 738
10/31/11 at 7:50pm
I bought mine from AVS, didn't want to take any chances on non oem lamps.
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post #706 of 738
10/31/11 at 8:04pm
Does someone have the product number for the Philips bulb used in the RS20 (the bulb, not the housing)?
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post #707 of 738
11/2/11 at 8:45am
Quote:
Originally Posted by Steve Smith View Post

I bought mine from AVS, didn't want to take any chances on non oem lamps.

+1

it's relatively cheap compared with messing up the projector or hassling with hacking the housing
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post #708 of 738
11/5/11 at 10:31am
Quote:
Originally Posted by deandob View Post

Does someone have the product number for the Philips bulb used in the RS20 (the bulb, not the housing)?

Here's are pics of the labels on my original RS20 lamp.

559 200/150 1.0
539QM71A J8
08330


Philips
Made in China
000011193
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post #709 of 738
11/5/11 at 12:54pm
^^^
So, you have the phillips made in China....it doesn't seem to be the same so have you used it yet? I should just buy a bulb from AVS......
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post #710 of 738
11/5/11 at 1:03pm
I bought my new lamp from AVS. Great service, fast shipping and an OEM product.
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post #711 of 738
11/5/11 at 1:17pm
Quote:
Originally Posted by KBMAN View Post

^^^
So, you have the phillips made in China....it doesn't seem to be the same so have you used it yet? I should just buy a bulb from AVS......

That's the original OEM lamp that came new in my RS20. I removed it from the housing. Yes, it's a Philips bulb made in China. The replacemment bulb I purchased from AVS was the same thing, a Philips made in China. Both work fine. I replaced the original at 1200 hous because I have a large screen and wanted more brightness. The replacement has about 700 hours on it now.
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post #712 of 738
11/5/11 at 2:05pm
I can't locate any sellers for a bulb with any of those model/serial numbers.

I also tried looking in the AVScience store for a JVC replacement and they only sell one from Sony. Waboman, did you buy from myprojectorlamps who advertise on this forum?
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post #713 of 738
11/5/11 at 2:23pm
Send an email to Mike of Mark at AVS and they will quote you a price.
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post #714 of 738
11/5/11 at 3:07pm
Quote:
Originally Posted by deandob View Post

I can't locate any sellers for a bulb with any of those model/serial numbers.

I also tried looking in the AVScience store for a JVC replacement and they only sell one from Sony. Waboman, did you buy from myprojectorlamps who advertise on this forum?

AVscience doesn't list the JVC lamp on their website. I sent them an email. Next thing you know, I was talking with Daniel Hutnicki and ordering a new lamp.

I still haven't replaced it yet. I'm over 2500 hrs on my current bulb and have it turned on high for my full 200w. I'm goofy like that. I want to get every last lumen from it. Although, you hear these horror stories of lamps blowing up. I should probably change it soon.

Here's a tip I thought I'd share.

Myprojectorlamps: Sells original bare bulbs (meaning that it’s made by either Philips, Osram, or Ushio)- the same companies that brand names like JVC, Sony, and Sharp use. It's just the bulb - You’ll have to re-use the module you already have. But it will save you some money.

Give Daniel a call.



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post #715 of 738
11/5/11 at 4:12pm
Will do. The AVScience guys are very responsive, I've been dealing with Mike for my RS55 pre-order.
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post #716 of 738
11/6/11 at 1:35am
Quote:
Originally Posted by Waboman View Post

AVscience doesn't list the JVC lamp on their website. I sent them an email. Next thing you know, I was talking with Daniel Hutnicki and ordering a new lamp.

I still haven't replaced it yet. I'm over 2500 hrs on my current bulb and have it turned on high for my full 200w. I'm goofy like that. I want to get every last lumen from it. Although, you hear these horror stories of lamps blowing up. I should probably change it soon.

Here's a tip I thought I'd share.

Myprojectorlamps: Sells original bare bulbs (meaning that it's made by either Philips, Osram, or Ushio)- the same companies that brand names like JVC, Sony, and Sharp use. It's just the bulb - You'll have to re-use the module you already have. But it will save you some money.

Give Daniel a call.



Thanks for the tip. Is the exchange of the spare bulb straight forward? Does it need to be soldered or inserted into the old housing?

Thanks,
N
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post #717 of 738
11/6/11 at 8:30am
Guys. Lots of things we sell are not on the store site and we are making a lot of changes to the site as well. We have always been primarily sales person based where you can call and talk to sales people who are enthusiasts and knowledgeable and this will very much continue.

We normally can ship original JVC bulbs in JVC bulb cages almost immediately. Please give me, Mike, or Benito a call and our crack shipping department will have one speedily on its way to you wherever you live. We do not sell cheap knock off bulbs. Contrary to public and popular opinion, dealer costs on the real bulbs, no matter what projector brand, are high and we make very little in selling them. We do it primarily as a service to our valued customers.
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post #718 of 738
11/6/11 at 8:40am
If any of you guys have a (bhl5010) basically dead bulb or very little output and want to get rid of it, please send me a pm. Will pay you for it of course.
Yes that right, a bad bulb. No housing needed, just the bulb.

Regards
David
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post #719 of 738
12/20/11 at 9:23am
Quote:
Originally Posted by DaveBoswell View Post

My experience: excellent on the cleaning, both of the glass just in front of the bulb, as well as the more advanced internal cleaning as posted a few pages back by avzector and described at

http://www.avforums.com/forums/proje...-part-1-a.html

In advance, thanks all for discovering and posting clear instructions - without a doubt the best regular maintenance tweak to the visuals I have come across since calibration of grey scale.

Summary of results:
- I am on my second bulb and about 800 hours into it
- I replaced my first bulb after only about 800 hrs and was dissapointed with the improvement - likely my first bulb is fine, and the dirty glass/prism was the real issue I was trying to fix - fortunately I saved my first bulb as back up as there is probably some life left in it still
- I did not do a before and after measurement of ANSI or On/Off contrast ratio, but visually I would say on/off is not impacted, but ANSI definately is much improved visually (looking at white movie credits on black background)
- estimate of increase in brightness definately in 50% range - change in overall snap to the picture was very obvious for me
- initially I cleaned only just the glass in front of the bulb - there was a mild colour shift, and a large improvement in brightness and perceived ANSI
- this weekend, I took apart the projector and cleaned thoroughly the inside face of the glass as per link above, and the exposed sides on the other prisms/diffusors as best I could
- I did not notice any residue on the cleaning materials on either the external nor the internal cleaning, but cleaned anyway just using some standard camera lens cleaning fluid and wipes
- the glass the everyone is cleaning itself must have a anti-relective coating as it looked a tiny bit yellow under daylight flourescent lights- perhaps the cleaning allows for the anti glare/relection to work better?
- there was a very substantial and easily visible colour shift following the internal cleaning which surprised me as I was not expecting much difference
- Measurement of the post internal and external cleaning with Colorfacts showed the Red had dropped relative to Blue and Green by 20%, and dE was approx 40, instead of more typically following a good calibration dE of 0 to 2 or so (and where it was prior to cleaning)
- in essence the accumulated dirt/grime on the glass must be absorbing blue and green light, but less so for red, as well as scattering the light somewhat
- a quick fine tuning of the grey scale and gamma last night brought everything back in order and the picture improvement was fantastic - back to brand new again!

Thanks all, and I will try to do before and after on the next go around after around 500 more hours.

Dave

Glad you found my 'cleaning past the prism' instructions useful. Yes, I would say you have plenty of life left in that first lamp at 800 hrs. I'm still on my first lamp in my HD350. As of last night - 2448 hours. I always planned on running this lamp to 2500 hrs - and hence a new lamp is on order and should be with me at the end of the week.

I will be doing the full clean once more before fitting the new lamp. Probably at the weekend. If I get time, I might even video it and put it on YouTube!

Thanks
Darren
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post #720 of 738
1/9/12 at 11:51am
Quote:
Originally Posted by avzektor View Post

Glad you found my 'cleaning past the prism' instructions useful.

Indeed. But the link to AVForum somehow didn't survive the cut/paste, so here it is anew.
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