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dropzone7
Joined: 12 Jun 2007
Posts: 1069
Location: Charlotte, NC
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| Posted: Fri Jan 18, 2008 2:00 pm Post subject: XG Tube question. |
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I hate to start a new thread just to ask this but I can't find the information I'm looking for. My question is this:
Do tubes from any XG (non LC) interchange? For instance, will tubes from an XG852 fit into an XG110?
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dbaisey
Joined: 09 Mar 2006
Posts: 821
Location: Southern Cal LA / Seattle WA
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| Posted: Fri Jan 18, 2008 3:25 pm Post subject: |
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Yes. They are also the same (bare tube) when used in the LC except with the LC hardware bonded on. The 1352 is LC the 852 is non LC. Doug
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dropzone7
Joined: 12 Jun 2007
Posts: 1069
Location: Charlotte, NC
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| Posted: Fri Jan 18, 2008 3:55 pm Post subject: |
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Thanks Doug! Just thinking ahead as I have a little wear on my blue tube. The green is pretty new.
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LostInUK
Joined: 15 Jul 2008
Posts: 13
Location: Lisbon
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| Posted: Tue Aug 05, 2008 5:01 pm Post subject: |
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Hello all,
I would appreciate your help with the following.
I have a NEC XG852 and because of its age I have been gathering information regarding several parts of it (tubes, boards, etc), just in case I need to service it. Regarding the tubes, one of them is quite new but the others aren't.
However, I am completely lost in what concerns the Part Number for each tube. I have found several reference to different P/Ns for each colour. Does that mean they are interchangeable, i.e. several P/N will work in the XG852?
Is there a main Part Number for each of colour tube that will make the buying order full proof?
Many thanks.
Best regards
Pedro
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dropzone7
Joined: 12 Jun 2007
Posts: 1069
Location: Charlotte, NC
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| Posted: Tue Aug 05, 2008 7:51 pm Post subject: |
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This from a page in the service manual.
952R7631 / CRT-R
952R7641 / CRT-G
953J5651 / CRT-B
I have all the covers off of my XG-852 at home right now so I will take a look at the stickers on the tubes to confirm.
I do know that you can use tubes from other XG models as long as they are NON-LC units. I'm not sure where you plan to buy new tubes from but the only place I know off is VDC which rebuilds tubes. Most XG users will tell you that those rebuilds are are a craps shoot at best. You are probably better off looking for a used chassis to harvest good tubes from. Tubes don't have to be new, they just have to be better than what you are currently using.
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LostInUK
Joined: 15 Jul 2008
Posts: 13
Location: Lisbon
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| Posted: Wed Aug 06, 2008 11:11 am Post subject: |
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Thanks for that.
I was thinking of contacting VDC regarding the tube. But as you say, I may well be better looking for a used projector with Blue and Red tubes in good condition.
You say one can use any XG series tubes if they are not LC. May I take that for granted? In that case, one could by any other XG non-liquid cooled projector to take the good tubes out.
If you can confirm the number from you chassis, I would appreciate it. I had the same reference you wrote from other people. The problem was some other had told me different P/N and I got unsure about which ones were right.
Regards,
Pedro
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dropzone7
Joined: 12 Jun 2007
Posts: 1069
Location: Charlotte, NC
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| Posted: Wed Aug 06, 2008 3:01 pm Post subject: |
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Well, I can speak from first hand experience on at least the following: swapped a green tube from an XG-110 to an XG-852 with no problem. I'm almost completely certain that you would be safe swapping tubes from any non LC unit to another non LC unit. Also, as Doug said above, even the LC "bare" tubes would work but you would have to swap out the hardware to use it in your non LC unit. Chances are that you are more likely to find donor tubes from an XG-110, XG-752 or XG-852 on Ebay, Craigslist, etc. than you are to find an LC unit at all. I have been busy every evening this week but I should be able to check the numbers on my XG-852 and XG-110 tonight and will let you know what those are.
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LostInUK
Joined: 15 Jul 2008
Posts: 13
Location: Lisbon
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| Posted: Wed Aug 06, 2008 3:08 pm Post subject: |
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Thx!
I am sorry for my ignorance, but what tube components are considered "hardware", and how easy is to swap them?
If I find tube without the "hardware", can I use the "hardware" of the ones I have at the moment?
Always learning...
Pedro
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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: Wed Aug 06, 2008 3:21 pm Post subject: |
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THe 'tube' usually consists of the mounting frame and the HV lead. That's it. All of the yokes and magnets need to be transferred from the old to the new tube, and they almost always need alignment after being transferred over.
A 'raw tube' usually means the glass envelope without the mounting frame, and may or may not include the HV lead.
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LostInUK
Joined: 15 Jul 2008
Posts: 13
Location: Lisbon
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| Posted: Wed Aug 06, 2008 3:28 pm Post subject: |
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Thank you. Understood. Best regards. Pedro
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dropzone7
Joined: 12 Jun 2007
Posts: 1069
Location: Charlotte, NC
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| Posted: Wed Aug 06, 2008 3:31 pm Post subject: |
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| LostInUK wrote: | Thx!
I am sorry for my ignorance, but what tube components are considered "hardware", and how easy is to swap them?
If I find tube without the "hardware", can I use the "hardware" of the ones I have at the moment?
Always learning...
Pedro |
Hardware would be everything attached to the front of the tube face like the lug (the gray square frame), springs, screws, etc. Ideally you would get the tube with the hardware intact and just install the tube from there. If not, you will just have to reattach those parts which on a non LC unit is not a big deal.
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dropzone7
Joined: 12 Jun 2007
Posts: 1069
Location: Charlotte, NC
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| Posted: Wed Aug 06, 2008 3:35 pm Post subject: |
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| Curt Palme wrote: | THe 'tube' usually consists of the mounting frame and the HV lead. That's it. All of the yokes and magnets need to be transferred from the old to the new tube, and they almost always need alignment after being transferred over.
A 'raw tube' usually means the glass envelope without the mounting frame, and may or may not include the HV lead. |
Uh oh, I didn't change the yokes and magnets when I did my tube change. I tried to mark everything really well and just changed the tube itself. Worked out fine but I'm sure that transferring all of the magnetics over is the better way to do it. I was not quite that confident though so I took the easy way out.
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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: Wed Aug 06, 2008 3:37 pm Post subject: |
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Well, there have been times where the astig magnet settings were within about 5% of where they should be, but most need readjustments.
As another former reseller once said to me when I asked how they did XG tube alignments when they swapped out tubes:
'What are astig settings?" 
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dropzone7
Joined: 12 Jun 2007
Posts: 1069
Location: Charlotte, NC
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| Posted: Wed Aug 06, 2008 3:41 pm Post subject: |
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| Curt Palme wrote: | Well, there have been times where the astig magnet settings were within about 5% of where they should be, but most need readjustments.
As another former reseller once said to me when I asked how they did XG tube alignments when they swapped out tubes:
'What are astig settings?" |
I was surprised at how well it lined up and some corner electronic astig was all I really adjusted. I would be scared to death to break silicone and do manual astig. I will leave that up to the pros, speaking of which it would be nice if there was someone knowledgeable in my neck of the woods.
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LostInUK
Joined: 15 Jul 2008
Posts: 13
Location: Lisbon
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| Posted: Wed Aug 06, 2008 3:47 pm Post subject: |
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It sounds an amazingly "easy" job for me! 
I will study the case in further detail, but sounds like I need some professional help for that. Probably one should use some instrumentation to do all those alignments or have a very well defined procedure to do it. I will search form more information how to change tubes in the XG series, just to understand how far I will go if I decided to change its tubes.
They could have made it a bit easier... 
Regards
Pedro
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dropzone7
Joined: 12 Jun 2007
Posts: 1069
Location: Charlotte, NC
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| Posted: Wed Aug 06, 2008 3:57 pm Post subject: |
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| LostInUK wrote: | It sounds an amazingly "easy" job for me!
I will study the case in further detail, but sounds like I need some professional help for that. Probably one should use some instrumentation to do all those alignments or have a very well defined procedure to do it. I will search form more information how to change tubes in the XG series, just to understand how far I will go if I decided to change its tubes.
They could have made it a bit easier...
Regards
Pedro |
Of course there is tons of great info here on Curt's site regarding setup and advanced procedures http://www.curtpalme.com/CRT_Tube_Replacement.shtm. PM me your email address and I will send you a copy of some things I read over before attempting this.
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rickycleung
Joined: 09 Apr 2008
Posts: 55
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| Posted: Thu Aug 07, 2008 2:11 am Post subject: |
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| Quote: | | I would be scared to death to break silicone and do manual astig. |
Before I did manual cpc magnet astig,I dare not break the silicone with a thought that it was factory sealed. However,the blobs were not perfect although they were not out. At last I tear off the silicone to do a manual cpc magnet astig by following the procedures found here. I read carefully all the steps and proceed carefully. Initially I spent almost 3 hours to do the green. Going to the screen and back to the projector to tweak. Then I tune other tubes the other nights. When it was done, the electronic astig for center of all 3 crt will only need minimal adjustment and now it is far better than the factory setup. But it is still hard to make the blobs round at all corners. You may not need to do this if you found that it is already quite good.
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