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Jeremy112
Joined: 28 Sep 2006
Posts: 2649
Location: Fond du Lac, WI
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| Posted: Mon Mar 11, 2013 12:18 am Post subject: NEC XG - Picture has a HV snap every 25 minutes or so |
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Hey guys,
I've had this problem for over a year and I let it go because it wasn't as noticable watching video as it is playing video games (especially the new SimCity  ). The issue is after the PJ warms up, the picture "snaps", or I should say I hear a HV arc and the picture kind of snaps as a result. not a major visual distortion, but enough that the picture widens about 2 inches horizontally then goes to normal right after the arc.
What HV hardware is misbehaving? I replaced the tubes a couple years ago, but I can't honestly say this problem was happening a couple years ago. I never removed any of the HV wires from the set except the ones attached to the tubes when I replaced them with new ones.
Like I said, nothing major.., but would like to get it taken care of before it becomes a problem (or very very annoying)
Jeremy
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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 Mar 11, 2013 12:53 am Post subject: |
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Anything around the HV leads, splitter. etc.
Open the side, take off the side panel where the HV splitter is, flip down the deflection board, and run it that way. Every time you get an arc, you risk nuking a board, so catch it.. QUICKLY.
To modify your signature:
If it's broke, and you don't try fixing it, don't come crying to me!
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Jeremy112
Joined: 28 Sep 2006
Posts: 2649
Location: Fond du Lac, WI
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| Posted: Mon Mar 11, 2013 7:39 pm Post subject: |
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| Curt Palme wrote: | Anything around the HV leads, splitter. etc.
Open the side, take off the side panel where the HV splitter is, flip down the deflection board, and run it that way. Every time you get an arc, you risk nuking a board, so catch it.. QUICKLY.
To modify your signature:
If it's broke, and you don't try fixing it, don't come crying to me!
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lmao, thanks for the advice Curt . I assume I will be looking for arcing in the dark while its opened? If I do see where its happening, do I clean up whatevers arcing and silicone? Never had this issue before, and before it does kill my projector, like you said, I should really fix it 
Would that have anything to do with the convergence being off slightly after power up? That usually happens as well after the machine has been off overnight. I use it everyday so it gets rather irritating waiting 2 hours for it to be warm enough that I can re-adjust the convergence.
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When I'm asking for a Model number, that doesn't mean I'm asking for a nude photo with your number on it
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Mon Mar 11, 2013 9:25 pm Post subject: |
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If youre gonna use silicone, use no automotive sh*t cause its conductive. Did you put the straps back on the tubes when you swapped them?
Clean any black sh*t off with isopropyl alcohol and clean the splitter and HV transformer.
Not cause i think itll fix it, but if youre going to run it with the covers off itd be nice to have it looking presentable... 
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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: Mon Mar 11, 2013 11:20 pm Post subject: |
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| CasetheCorvetteman wrote: | If youre gonna use silicone, use no automotive sh*t cause its conductive. Did you put the straps back on the tubes when you swapped them?
Clean any black sh*t off with isopropyl alcohol and clean the splitter and HV transformer.
Not cause i think itll fix it, but if youre going to run it with the covers off itd be nice to have it looking presentable... |
Little OCD Case?
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HD done right!
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Tue Mar 12, 2013 12:23 am Post subject: |
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Alot mate, alot...
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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: Tue Mar 12, 2013 3:39 am Post subject: |
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I don't think the convergence drift has anything to do with the arcing. I would wipe down all leads and connectors with isopropyl alcohol, take the HV connectors off the HV splitter and wipe everything down. if you can hear the arc, then you should be able to see it as well. Keep in mind that if you see it out of the corner of your eye, that won't help, as your brain will trick you as to what it's coming from. Been there, done that.
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Jeremy112
Joined: 28 Sep 2006
Posts: 2649
Location: Fond du Lac, WI
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| Posted: Tue Mar 12, 2013 3:57 pm Post subject: |
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| CasetheCorvetteman wrote: | If youre gonna use silicone, use no automotive sh*t cause its conductive. Did you put the straps back on the tubes when you swapped them?
Clean any black sh*t off with isopropyl alcohol and clean the splitter and HV transformer.
Not cause i think itll fix it, but if youre going to run it with the covers off itd be nice to have it looking presentable... |
Aside from the evident fact I replaced the tubes, they are 100% setup as stock. I always make sure to put things back the way manufacturers indended 
And I don't think I'd run it with the covers off any longer than needed to fix it lol, besides, whats so ugly about the innards of the XG? All that shiny aluminum when you first take the cover off, ahhhh
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Jeremy112
Joined: 28 Sep 2006
Posts: 2649
Location: Fond du Lac, WI
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| Posted: Tue Mar 12, 2013 4:03 pm Post subject: |
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| Curt Palme wrote: | | I don't think the convergence drift has anything to do with the arcing. I would wipe down all leads and connectors with isopropyl alcohol, take the HV connectors off the HV splitter and wipe everything down. if you can hear the arc, then you should be able to see it as well. Keep in mind that if you see it out of the corner of your eye, that won't help, as your brain will trick you as to what it's coming from. Been there, done that. |
Gotcha Curt , just as a side note, the PJ yet again drifted, the blue ALWAYS seems to go up or down about 1/4 of an inch from where it should be (either above or below the red & green), and the red seems to shift to the left or right, green doesn't seem to move simply because it is lined up with the blue when I mute the red tube., but it will be off as far as above or below the convergence center, so I usually have to do adjustments (and for the life of me my brain can't think of the damn word right now)
Anyway, I think I will go ahead and get those contacts cleaned up, maybe route the air hose into the basement so I can blow it out while I'm at it. I never did that when I retubed it, I was just happy to have unworn tubes when they got here
I will post a follow up once I have done as you suggested Curt, hopefully some cleaning is all she needs
Case, maybe you should come on over across the pond to detail my XG
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Wed Mar 13, 2013 2:41 am Post subject: |
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No worries mate, do you have a pressure washer there or do you want to take it through the car wash? I usually use a large Winterhalter comercial dish washer for board cleaning, good as new in 30 seconds.
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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: Wed Mar 13, 2013 3:34 am Post subject: |
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| CasetheCorvetteman wrote: | | No worries mate, do you have a pressure washer there or do you want to take it through the car wash? I usually use a large Winterhalter comercial dish washer for board cleaning, good as new in 30 seconds. |
Case shows up in WI with his dishwasher on a 2 wheel dolly.
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HD done right!
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Wed Mar 13, 2013 3:41 am Post subject: |
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Would have to be a bloody big 2 wheel dolly mate!! Ill have to bring a diesel generator to supply the 400v 3 phase to the machine too!!
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