CurtPalme.com Home Theater Forum

dturco · Posted: Mon Nov 23, 2009 2:10 am Post subject:

Ok. I did do the coi looking no sparks on or near them only on the convergence board every cyle with cables attached but not ribbon. I am going to remove the cables and put back just the ribbon.

Ok no cables just the ribbon connector no sparks.I have not even been looking for the Herringbone.

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Thanks Curt, I was thinking that as well since I have gotten shocked many times from static on the focus cols after a power down. So i was thinking that the HV could build up a similar charge to through the convergence coil connectors. So it could be a bad ground connection from tube to ground.

Dave make sure your black ground straps that are taped to the bell housings of the tubes are connected properly to your Video Neck boards. i know you said they are but double check. Also i wonder if one of the straps is not making a good contact on the coper tape used.

Since the herring bone was diminished more when no convergence cables were connected you need to get the ground to not go through those cables, or the Ground for those cables that possibly go to the chassis are not making a good connection. But now since you removed the ribbon cable from the CVA also remove it form the mother board a few times to clear any oxidation. do it for all the cables tot he rear heat sink and mother board, so the VDM ribbon cables also and the white ground cable and its screw on the mother board it connects to.

Athansios

dturco · Posted: Mon Nov 23, 2009 2:30 am Post subject:

Will do all of them, but to get to the tube copper ground straps won't I have to pull the tubehousing remember this is on the ceiling so it may take time.

Thanks, Thanks, Thanks,

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Forget the copper straps for now and just make sure all cable and ribbon connecters are cleaned of any oxidation so the grounds of all modules are making contact. Like others have said the first reason herring bone will show up is a ground problem either a ground loop or a bad contact to ground.So make sure all connectors on all boards are clean, the connectors to the back plane and mother board will be hard to get to so reseating a bunch of time will scrape any oxidation free. If all those are corrected and it is still there then we have to look to other places.

I'd start with the CLM then.

Athanasios

Mr. Green · Posted: Mon Nov 23, 2009 2:50 am Post subject:

Drat! I'm all caught up and now have to wait to see what happens! This is like watching golf!!!

Come on Dave chop chop get-er-done!! Razz

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

**Curt Palme** · Posted: Mon Nov 23, 2009 2:57 am Post subject:

I'd like to apologize for this thread going into its third page... Wink

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

dturco · Posted: Mon Nov 23, 2009 3:07 am Post subject:

Well it is time to rest. I am starting to bump things like the HDM. It did not fall out but did slid down a little. Also the dreaded h fail v fail lights have come on so I'm sure I've bent a connector some where. Embarassed

Thanks Nashou and Curt.

And I am going to take it off the ceiling to do anything further. I my even take pics with my fat hands in them.

I live to fight another day. Thumbs Up

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Ok take a break, but good diagnosing so far. check that you have the VDM ribbon cable connected on both rows. its common to not get it right and have no power up. So on the VDM and the mother board.

Now its my turn to go mess with the blend.

Athanasios

dturco · Posted: Mon Nov 23, 2009 3:23 am Post subject:

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

dturco · Posted: Mon Nov 23, 2009 3:31 am Post subject:

Resting for sure, the Brews are a calling. Thumbs Up

J Kildare · Joined: 28 Sep 2006 Posts: 164

Before you take it off the ceiling please try what I said on the first page.
There is supposed to be a brass screw in the main panel and this ties the neutral to ground, if not there your system is floating. If it is there and the ground to the house has been damaged you have circulating current running thru your projector from neutral to ground. In the sub panel this brass screw should not be installed.

You have to confirm you have a reliable power source properly grounded. If you do not, these problems will just keep floating around with different symptoms.

Jim

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Jim is right about the sub panel. remove that screw . I had to remove it when i installed the isolation transformer. In my case though those ground and ploarity testers show i have no ground, because my iso is ground.

I assumed you do not have that screw in the sub panel. Also make sure your Projector and all other sources are coming from the same panel box.

Athanasios

**Curt Palme** · Posted: Mon Nov 23, 2009 4:21 am Post subject:

Why not just run a long extension cord from the neighbor's place, and tell them it's a 'temporary fix. You'll appreciate the savings in your hydro bill.

J Kildare · Joined: 28 Sep 2006 Posts: 164

Tooooo far away Curt, already suggested. Razz

Jim

dturco · Posted: Mon Nov 23, 2009 5:30 am Post subject:

Jim thanks again, yes the main load center is bonded and grounded. The sub panel is not bonded it is floating. The outside ground rod I will check tomorrow. Remember I was the builder. I had Licensed sub contractors do that work. The guy who does my electrical work is a 72 an old crotchety guy, that yells at the help a lot, that better be right boy.

His sons were the boys, funny to watch them at work. So all of the inside wiring is good. The outside ground there is a ever so slight chance of some damage that could have happened, but that too is remote. But I will absolutely check it and probably will run a new temp ground as you suggested Jim, it cant hurt.

Thanks again
Dave

huggy · Posted: Mon Nov 23, 2009 8:23 am Post subject:

Dave

Since you can't get power from your neighbours,will a small generator do the job? maybe you can hire one just to eliminate one problem.
Just a thought,or should I just crawl back into my hole as I have no idea what you guys are talking about Very Happy

Dave