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csamos
Joined: 10 Jul 2008
Posts: 59
Location: Austin, TX
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| Posted: Mon Jan 04, 2010 3:01 pm Post subject: 8500 tube replacement |
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I finally have a new blue tube for my 8500. I haven't replaced a tube in my projector yet. I have looked over the tube replacement procedure posted here (from the NEC XG manual), but I was hoping for something 8500-specific.
Is there anything posted/available that gives detailed instructions on replacing a tube in the 8500?
Is there any general advice you can provide before I tackle this?
My projector is ceiling mounted. I'm assuming I will need to remove it before attempting this.
Thanks in advance!
-Carl
http://www.samos.org/Theater/
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Mon Jan 04, 2010 3:26 pm Post subject: |
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Yes, take it down. the 'tips' section gives you some basics, simply in the pix posted there that show how the whole tube housing comes out. It's pretty easy.
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csamos
Joined: 10 Jul 2008
Posts: 59
Location: Austin, TX
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| Posted: Mon Jan 04, 2010 3:41 pm Post subject: |
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| Nashou66 wrote: | Is it a bare tube or in the housing?
Athanasios |
It's a new tube with all magnetics and focus coil already in place.
-Carl
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Mon Jan 04, 2010 3:50 pm Post subject: |
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Well, then it's even easier. 
Have at it. You can take the whole plastic housing off without unscrewing the two halves. That will save 10 minutes.
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Mon Jan 04, 2010 4:21 pm Post subject: |
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It's really easy to do on the ceiling with a 9500, on an 8500 not so much. However it's possible, I recently a tube on an 8500 on the ceiling. It's a bit of a pain but still easier than dropping/re-hanging 165 pounds. Tonight I'll try and put together a little word guide with pics. It does require a secone set of hands for a few minutes, my wife was the lucky winner
Last edited by draganm on Mon Jan 04, 2010 5:50 pm; edited 1 time in total
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csamos
Joined: 10 Jul 2008
Posts: 59
Location: Austin, TX
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| Posted: Mon Jan 04, 2010 4:43 pm Post subject: |
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| draganm wrote: | | It's really easy to do on the ceiling with a 9500, on an 8500 not so much. However it's possibler, I recently I replaced a tube on an 8500 without dropping it from the ceiling. It's a bit of a pain but still easier than dropping/re-hanging 165 pounds. Tonight I'll try and put together a little word guide with pics. It does require a secone set of hands for a few minutes, my wife was the lucky winner |
Awesome, thanks!
I would definitely prefer to leave it up on the ceiling if possible, but I'm prepared to take down if necessary.
-Carl
http://www.samos.org/Theater/
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Mon Jan 04, 2010 11:24 pm Post subject: |
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I have dropped a complete 3 tube rack out of an 8500 without removing the PJ from the ceiling. It's a two man job. But removing a
Marquee from the ceiling is properly a 3 man job at least if you don't have a winch or lift.
The best advice possible: Don't rush the job. Take your time and triple check everything.
CJ
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Tue Jan 05, 2010 12:12 am Post subject: |
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| csamos wrote: | | draganm wrote: | | It's really easy to do on the ceiling with a 9500, on an 8500 not so much. However it's possibler, I recently I replaced a tube on an 8500 without dropping it from the ceiling. It's a bit of a pain but still easier than dropping/re-hanging 165 pounds. Tonight I'll try and put together a little word guide with pics. It does require a secone set of hands for a few minutes, my wife was the lucky winner |
Awesome, thanks!
I would definitely prefer to leave it up on the ceiling if possible, but I'm prepared to take down if necessary.
-Carl
http://www.samos.org/Theater/ |
Hey.... I just clicked the link to your theater..... That is great. I really like to entire layout. Very nice... 
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Zebu Fellenz
Joined: 21 Dec 2006
Posts: 2567
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| Posted: Tue Jan 05, 2010 12:14 am Post subject: |
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I pulled the three tubes out of my 8000 by myself when it was on the ceiling. It was not something I would want to ever do again by myself, but wouldn't be too hard with a second person.
But if you have a pulley mount, a winch, or a genie lift I would drop the Marquee and do it on the floor, the last thing you want to do is drop a minty tube, and chances of this happening are greatly reduced if the Marquee is already on the floor.
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Tue Jan 05, 2010 12:22 am Post subject: |
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Hello
It is much easier getting the new tube in if you get two Allen bolts that are 1/2" longer than stock, these can be used as "pullers" and the vertical bolts (4) holding all three tubes together can be used as clamps when putting the original allen bolts back in, as the longer bolts will be too long to keep.
Also, before starting, lower the blue G2 to 55 and contrast/briteness to 30/30 as a precaution.
.
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Tue Jan 05, 2010 4:20 am Post subject: |
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| Tim in Phoenix wrote: | Also, before starting, lower the blue G2 to 55 and contrast/briteness to 30/30 as a precaution.
. |
good advice, I just added it to my instructions. 
Here's an Msword.doc I put together quickly (with pics) that shows how to remove only one tube. Ive done this twice and it worked well both times. It's not fool proof but I don't recommend fools working on CRT's anyway 
BTW if these look familiar it's because it's an edited version of the HD mod's dis-assembly instructions.
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Marquee tube Removal 8500 ceiling.doc |
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Tue Jan 05, 2010 4:21 am Post subject: |
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most importantly, good luck Carl
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csamos
Joined: 10 Jul 2008
Posts: 59
Location: Austin, TX
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| Posted: Tue Jan 05, 2010 4:30 am Post subject: |
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| draganm wrote: | | most importantly, good luck Carl |
Thanks, you rock! I can't wait to get my new tube in place. I'm not sure if I'll be able to get to it this weekend, but I will soon, and I'll report back with my success.
-Carl
http://www.samos.org/Theater/
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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CRT_Ben
Joined: 28 Aug 2006
Posts: 1684
Location: Northern Virginia
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| Posted: Wed Jan 06, 2010 2:14 am Post subject: |
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Fantastic write up Dragan, I promised Carl I would do one after the holidays but you beat me to it
Carl, awesome looking theater! I'll be starting construction of my room hopefully in the next few months and I can only hope it will turn out as well.
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Wed Jan 06, 2010 2:33 am Post subject: |
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| CRT_Ben wrote: | | Fantastic write up Dragan, I promised Carl I would do one after the holidays but you beat me to it |
thanks, oddly enough the guy who told me about the all-thread called AVAX on AVS recently switched to DLP.  Nice guy but the whole install was kinda half-done anyway.
Carl since you have all the covers off take them outside and paint that thing. 
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csamos
Joined: 10 Jul 2008
Posts: 59
Location: Austin, TX
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| Posted: Wed Jan 06, 2010 4:13 am Post subject: |
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| draganm wrote: | | Carl since you have all the covers off take them outside and paint that thing. |
I have most of it painted now:
I just need to get that last bit finished. Since I'll have it down from the ceiling anyway I'll do my best to take care of that.
-Carl
http://www.samos.org/Theater/
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Wed Jan 06, 2010 5:18 am Post subject: |
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that looks good, I left mine Gray on the bottom and 2 top covers, I like the contrast.
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garyfritz
Joined: 08 Apr 2006
Posts: 12088
Location: Fort Collins, CO
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| Posted: Wed Jan 06, 2010 4:20 pm Post subject: |
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Nice writeup, Dragan. Wish I'd had that when I pulled the green from MY 8500!! I did it on the ceiling, by myself, no helper, and I didn't know about the all-thread trick. Ooof. I would NEVER do that again.
I'd much rather drop the projector and work on it on the floor. Which, again, I do by myself, no helper. With Clarence's Patented Chain Lift technique, I can take the 8500 up to the ceiling in about 7-8 minutes. Takes another few minutes of grunting and swearing to get it into the mount, but I've literally gone from the floor to fully in the mount in less than 15 minutes.
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