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An acring g70 blue tube

 
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locoman



Joined: 28 Oct 2009
Posts: 23
Posted: Fri Nov 27, 2009 8:11 pm    Post subject: An acring g70 blue tube
Hi All,

I've replaced the blue tube and when I power it on, I can see arcing coming from the HV Lead. I've tried cleaning it, but it is still arcing. Any ideas?

Thanks,

Hein.
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draganm



Joined: 08 Mar 2006
Posts: 8990
Location: Colorado

Posted: Sat Nov 28, 2009 6:25 pm    Post subject:
well you either damaged it when you were taking it aqpart or don't have it full engaged. Try sliding the boot back up the wire, pushing the metal connector in firmly into the socket, then sliding the boot down over it all. A little dielectric Silicone grease might help it all go together.
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Mark_A_W



Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia

Posted: Sun Nov 29, 2009 7:23 am    Post subject:
Arcing from where exactly?
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locoman



Joined: 28 Oct 2009
Posts: 23
Posted: Sun Nov 29, 2009 7:47 am    Post subject: Solved!, now I have new problem.
After cleaning the HV lead with alcohol, i've used a hot air gun to dry it properly. Once installed, after like 5 min of running the PJ, the problem completely disappeared! But now I have a new problem. Before any adjustments, I ran the projector for at least 2-3 hours to test the newly replaced blue & red tubes. All was good and I started the adjustment procedure, according to the service manual, from section 1.3.1 to 1.3.11. Everything went well until i've reached section 1.3.5.5, the moment I pressed "registration key", I noticed static/video noise (like really bad) coming from the red tube! I immediately switch it off, recheck all the connections and reseated all the boards, but the problem is still there! Any ideas? I really hope it's not the YA & YB board, i've already replaced them some time ago! Sad

Thanks

Hein.
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Mark_A_W



Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia

Posted: Sun Nov 29, 2009 8:04 am    Post subject: Re: Solved!, now I have new problem.
locoman wrote:
After cleaning the HV lead with alcohol, i've used a hot air gun to dry it properly. Once installed, after like 5 min of running the PJ, the problem completely disappeared!

Thanks

Hein.



I highly doubt it.

It will be back.


A good condition HV lead, with good silicone RTV on the connections, should not arc, under any circumstances (underwater, covered in iron filings...never).

Cleaning it does not fix 32,000v jumping through a damaged lead.


Which begs the question...were you getting a real arc? A real arc is terrifying. It's LOUD, it's scary, it destroys circuit boards. The HV will jump 30-50mm though the air.


For instance, if the ground lead from the HV splitter on a NEC is not connected, you get a tiny little arc - like a stove lighter. Completely different level of "arc".
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locoman



Joined: 28 Oct 2009
Posts: 23
Posted: Sun Nov 29, 2009 8:21 am    Post subject: Re: Solved!, now I have new problem.
Mark_A_W wrote:
locoman wrote:
After cleaning the HV lead with alcohol, i've used a hot air gun to dry it properly. Once installed, after like 5 min of running the PJ, the problem completely disappeared!

Thanks

Hein.



I highly doubt it.

It will be back.


A good condition HV lead, with good silicone RTV on the connections, should not arc, under any circumstances (underwater, covered in iron filings...never).

Cleaning it does not fix 32,000v jumping through a damaged lead.


Which begs the question...were you getting a real arc? A real arc is terrifying. It's LOUD, it's scary, it destroys circuit boards. The HV will jump 30-50mm though the air.


For instance, if the ground lead from the HV splitter on a NEC is not connected, you get a tiny little arc - like a stove lighter. Completely different level of "arc".



Hey Mark. The first time I started the PJ, I heard a loud (only once) arc coming from the HV lead to splitter and then only very little arcing, one can bearly hear it. When I turned the lights off, to darken the room, you can see tiny little arcing (not sure if you can call it arcing) coming from the blue tube HV Lead. After cleaning the HV lead, it disappeared completely.
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Mark_A_W



Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia

Posted: Sun Nov 29, 2009 12:17 pm    Post subject:
Ok, sounds like it may have been a static build up, rather than a full blown HV arc.


I would keep a very good eye on that.
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locoman



Joined: 28 Oct 2009
Posts: 23
Posted: Sun Nov 29, 2009 12:20 pm    Post subject:
Found it. Bad b-board, ic700(el2160cs) has failed and not sure why....? Anyway, now I have to go find a replacement.
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locoman



Joined: 28 Oct 2009
Posts: 23
Posted: Sun Nov 29, 2009 12:21 pm    Post subject:
Mark_A_W wrote:
Ok, sounds like it may have been a static build up, rather than a full blown HV arc.


I would keep a very good eye on that.


You're probably right, makes more sense too! Yeah, ill keep i close eye on it!! THANKS!
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macgyver655



Joined: 22 Aug 2007
Posts: 8508
Posted: Sun Nov 29, 2009 8:35 pm    Post subject:
locoman wrote:
Found it. Bad b-board, ic700(el2160cs) has failed and not sure why....? Anyway, now I have to go find a replacement.


What led you to believe it is ic700?
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locoman



Joined: 28 Oct 2009
Posts: 23
Posted: Mon Nov 30, 2009 7:32 pm    Post subject:
macgyver655 wrote:
locoman wrote:
Found it. Bad b-board, ic700(el2160cs) has failed and not sure why....? Anyway, now I have to go find a replacement.


What led you to believe it is ic700?


I traced the red osd signal from ic601 and worked my way up to ic700 and replaced it with ic800 to test it. Got the red tube going, but now I need a replacement ic to get the green one going again.
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macgyver655



Joined: 22 Aug 2007
Posts: 8508
Posted: Mon Nov 30, 2009 7:55 pm    Post subject:
locoman wrote:
macgyver655 wrote:
locoman wrote:
Found it. Bad b-board, ic700(el2160cs) has failed and not sure why....? Anyway, now I have to go find a replacement.


What led you to believe it is ic700?


I traced the red osd signal from ic601 and worked my way up to ic700 and replaced it with ic800 to test it. Got the red tube going, but now I need a replacement ic to get the green one going again.


Ahhhh. That's exactly what I was going to suggest. Excellent work Thumbs Up
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