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mycatisretarded
Joined: 18 Jan 2008
Posts: 124
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| Posted: Sun Dec 13, 2015 3:28 am Post subject: help with re-tubing |
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Getting ready to install electronics to different tube, i mangled this piece of white tape that was on the tubes neck. What is this tape? Can i survive without it?
Also, i'm not absolutely sure this is a green tube, the label is Panasonic pt22-?2. 44 27 mbe. Green?
Thanks
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mycatisretarded
Joined: 18 Jan 2008
Posts: 124
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| Posted: Sun Dec 13, 2015 3:32 am Post subject: |
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Correction, it is pt?2-19. 44. 27.mbe
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Sun Dec 13, 2015 8:48 am Post subject: |
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Put the tube close to a neon light that will excite the phosphor somewhat, and you can decide the color from its afterglow.
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projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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Hulio
Joined: 15 Apr 2006
Posts: 494
Location: Belgium
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| Posted: Sun Dec 13, 2015 11:01 am Post subject: |
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It seems to be a blue tube.
You will be fine without that tape too. Some installers put it there to ensure that the deflection yoke, focus yoke and stigmators rings will stay firmly in their position after proper setup. It just take care that there is a bit friction between the plastic parts and glass.
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Sun Dec 13, 2015 4:21 pm Post subject: |
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You can use surgical tape if you like.
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mycatisretarded
Joined: 18 Jan 2008
Posts: 124
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| Posted: Sun Dec 13, 2015 6:03 pm Post subject: |
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all three tubes are being replaced and are out of the projector, is there any harm in plugging in only one tube and turning on projector for a few seconds to check color?
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Sun Dec 13, 2015 6:12 pm Post subject: |
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Hello
Your Marquee will not fire up unless all scan yokes are plugged into the HDM and VDM
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tschaeikaei
Joined: 08 Apr 2013
Posts: 490
Location: Germany/Saarland
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| Posted: Sun Dec 13, 2015 8:40 pm Post subject: |
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PT22-19 is a fast green (P43 phosphor) tube.
Very sure about that.
Blues and greens are P19LCP09-RJA (red) and P19LCP09BMB (blue). There are also PT22-30, same as PT22-19 but with LUG-type pinout.
There are others, but these are besides some exotics the vast majority of tubes found in Marquees.
There are Thomson tubes (look totally different), LUGs (other stickers) and some others that are not original in Marquees.
Standard green tubes are P19LCP09-HKA (P22 medium decay phosphor).
How does this PT22-19 look like? Can you take a photography of the phosphor?
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Marquee 9500U edgeblend P43 | NEC 9PG
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mycatisretarded
Joined: 18 Jan 2008
Posts: 124
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| Posted: Sun Dec 13, 2015 8:40 pm Post subject: |
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this projector has been in pieces for a long time (years), I've finally gotten some time to try to get it back together. I have three tubes in place and I think I'm ready to power up so I can check this tube color on the unknown. What are some things I need to verify before I power up so as to not blow this thing up? I've got the g2 wire on the correct pin.... any other fatal mistakes I could have made? Is there a safe first time power up procedure? thanks, dc
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tschaeikaei
Joined: 08 Apr 2013
Posts: 490
Location: Germany/Saarland
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| Posted: Sun Dec 13, 2015 9:06 pm Post subject: |
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Let me tell you, it's a green.
What did you do since the last picture? Tape on the tube neck? All yokes and CPC magnets mounted?
Glycol filled in there? Bellows ok? Aquadag grounding wires there?
What tube are the red and blue tubes in your projector? LCP?
G2 wire mounts the same as with LCP tubes. http://www.curtpalme.com/ElectrohomeMarquee_Layout7.shtm
That's how i do it with the tape:
  
Check every cable twice. Especially on the FGM, HDM, astig, vertical and convergence board, make sure the neckboards multipin connectors are not mis-pinned.
If the HV- splitter is not fastened on the green tube, use a isolating piece (at least 1 inch thick) between splitter and case.
Use that tape between the tube and yoke clamps! It prevents the tube from breaking. Do not overtighten the clamp screws.
Just enough that you cannot move the yokes by hand.
Regards, Julian
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Marquee 9500U edgeblend P43 | NEC 9PG
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mycatisretarded
Joined: 18 Jan 2008
Posts: 124
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| Posted: Sun Dec 13, 2015 9:41 pm Post subject: |
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the red and blue are lcp, they are complete with new bellows and filled. the green (i hope) does not have bellows and glycol yet, I did not use the tape- I could easily pull the electronics back off and use tape, none of the clamps are tight yet, aquadag grounding wires are there.
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tschaeikaei
Joined: 08 Apr 2013
Posts: 490
Location: Germany/Saarland
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| Posted: Sun Dec 13, 2015 10:19 pm Post subject: |
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Ok, i did not try it without the tape myself and i never will.
I think this is important, because it protects the tube from breaking.
You don't have to use surgery tape, every type of soft tape should work.
Regards, Julian
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Marquee 9500U edgeblend P43 | NEC 9PG
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mycatisretarded
Joined: 18 Jan 2008
Posts: 124
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| Posted: Mon Dec 14, 2015 11:20 pm Post subject: |
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The tubes are installed. The first time I turned it on, I heard fans and saw glow from the end of the tubes but apparently no hv, no light output but there were no error lights.
I turned it off, rechecked all connections, turned back on and now I get V Fail light. I verified +/-5vdc and +/-15vdc are on the vertical board and ohmed the connectors to that board. where do I go from here?
I have an 8500 as a spare parts machine)
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mycatisretarded
Joined: 18 Jan 2008
Posts: 124
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| Posted: Tue Dec 15, 2015 1:48 am Post subject: |
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Found the problem, the connector from the green tube to the vert. board was bad, spliced in a new one and it's alive!
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Tue Dec 15, 2015 3:30 am Post subject: |
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| mycatisretarded wrote: | | Found the problem, the connector from the green tube to the vert. board was bad, spliced in a new one and it's alive! |
(Insert maniacal laughter here)
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Tue Dec 22, 2015 10:18 pm Post subject: |
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I was going to say, if you are actually replacing the tubes themselves in their housings, be careful not to install any of them in the upside down position! I ALMOST did that once. It would have been bad.
Glad you got it working! Now for the real fun: A complete setup and alignment.
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