CurtPalme.com Home Theater Forum

dturco

OK, I have found, kind of, what is causing the cellphone to drop out on GOZER. It only does that if the retrace is set to SHORT and 1080p. Which is how I was running it. I did an initialization and forgot to reset to SHORT. It was easier to set up, and I thought to myself, Why did it go so easy? I also had to increase the V-size to 95 from 88 and 1080i matched widthsize in LONG retrace, but never matched while in SHORT.

So I guess I have found the symptom? I still don't know why, but now at least I know what is causing the issue. Does anyone know what is happening with the LONG/SHORT bit? Long does cause the image to shift and loses some image, but it is much more stable in LONG. In SHORT the entire image is displayed on the DVE disc Overscan picture. On LONG I have to phase [57]to match and lose 5% of the side image, but it looks better and there isn't any ringing on the left side in LONG.

So right now the cellphone is working if GOZER is set to LONG retrace, and if I set it to SHORT my cellphone drops out.

Also my son's phone works near GOZER in LONG or SHORT.

Any idea of what part[s] might be needed to fix this?

Curious stuff.

Dave

stefuel · Posted: Thu Dec 03, 2009 10:33 pm Post subject:

Ya, you need a new phone...

dturco · Posted: Thu Dec 03, 2009 11:28 pm Post subject:

Remember the Herringbone...

ecrabb · Posted: Thu Dec 03, 2009 11:39 pm Post subject:

Herringbone... RF emission/interference... Hmm... Is the machine grounded well? Have you checked that the outlet it's plugged into has a good solid ground, and verified that hot/neutral aren't reversed?

SC

dturco · Posted: Fri Dec 04, 2009 12:13 am Post subject:

Yep, I guess you missed the Chronicles thread, and the apology thread, for the chronicles thread.
So yes, we check the outlet, the sub panel, the main panel, and the house ground bar. All are correct.

Also checked were, the stig board, the focus, the convergence and the vertical board. HDM was replaced with a Curt tested one a while ago. Also swaped in a new iec power cord. Also ran additional ground straps to the hdm and focus cages.

dturco · Posted: Fri Dec 04, 2009 2:04 pm Post subject:

A stumper huh?

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

dturco · Posted: Fri Dec 04, 2009 4:18 pm Post subject:

ecrabb · Posted: Fri Dec 04, 2009 5:03 pm Post subject:

dturco · Posted: Fri Dec 04, 2009 5:14 pm Post subject:

YEP, SC, I ran an extension cord from my furman Power conditioner, no difference. Yes It does sound like HV but the NOISE interference that knocks out the cell phone is only when frequencies are above 1080i. ie: when set to 67 and 59 for blu-ray or if the internal frequency is above 33 and 60. Confused

**AnalogRocks** · Posted: Sun Dec 13, 2009 1:58 am Post subject:

Any update on this?

dturco · Posted: Sun Dec 13, 2009 2:51 pm Post subject:

No real news, M/P thinks it's a yoke and we still don't know which one. Right now the picture is pretty damn good, but the cell phone issue remains. I am currently using borrowed boards, an 03 VIM and neckboards. I am waiting for M/P to send replacement boards and another member has said they are buying the M/P VIM and neckboards from me.

I think if I am going to be doing yokes I might just as well do the Frankenyokes. Of course I have to find a set DIRT CHEAP to use first.

draganm · Joined: 08 Mar 2006 Posts: 8990 Location: Colorado

mp20748 · Posted: Mon Dec 14, 2009 10:04 am Post subject:

Cell phones operate at frequencies far above the average interference range of RF signals. Plus, they're of the modern HF RF devices that uses very precise bandpass filtering networks and IF staging.

Because of this, It's really rare to cause FCC part 15 rule problems for a cell phone.

Not sure what's going on with his projector, but I think he's on the right path now. And going with Frankenyokes would be a good upgrade for him even if the problem is not yoke related.

dturco · Posted: Mon Dec 14, 2009 1:43 pm Post subject:

Oh here's a little bit that has been bothering me that I have not described well enough. I can set up GOZER at 33 & 59 [1080i] have everything perfect, Dead centered rasters, perfect picture, short retrace. Then I will switch to the higher frequency 67 & 59 [1080p for Blu-ray] short retrace. The rasters then shoot left off of the tube faces. The red is the most pronounced 1.5 grids on the internal test pattern.The blue does it also a good bit, 1, maybe, .75, grids on the internal test pattern. The green just a little bit of movement, the line of the test grid is bowed a smidge, but not off the tube face.

Now if I switch back down to 1080i from 1080p the image on screen moves 2 inches to the left and shrinks in size overall in width by 2 inches.

Also the HV is arcing somewhere. I can hear it but it is not constant, it's very rare, but does happen.

So what does this point to?

And Dragan, more importantly for me, how could this be my fault? Be sure to make an itemized list,oKay? Razz

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

Dave have you turned off all the lights and looked for the HV arc while its on, usually right when they turn on is when it happens. If not you'll ahve to sit there and wait for it, yes its boring but you want to fix that leak before more damage happens.

if possible move the X-ray shield as much out of the way as possible so you can see the flash. It might be near the splitter or on the anode connection on the bell housing, that one you wont be able to see well because of the plastic shield/covers on the tube but you might see the falsh peak out some where in the vicinity so you can narrow it down to which tube.

This is one thing we did not try, unplug one HV lead from the splitter to see if it is one of the tube anode leads. if the the HV leak is still present after that test then it might be the main lead from the HVPS. Just make sure you move the open end away from any metal and your self Wink

Athanasios

dturco · Posted: Mon Dec 14, 2009 2:34 pm Post subject:

Yep, I turned off the lights and waited, I also pulled each lead from the splitter and waited. The problem is, it does not happen for days sometimes weeks in between hearing the HV arc. I have also changed the HV splitter. I am leaning towards the yoke or the anode leads because I never checked them at all.

If it's a yoke could it cause the image shifting and the arc? If so I think that's our culprit.

I'm headed to Philly to visit my friend and his wife, who is still in the hospital, the one I discussed in the Flu shot thread, things do not look good. Sad

So I'll check back tonight or tomorrow.

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

Ahh Ok, so it could be the Anode to one of the tubes or as you said the Deflection yoke. and the arc could case the Convergence to go wacky when it arcs to it.

Athanasios

draganm · Joined: 08 Mar 2006 Posts: 8990 Location: Colorado

**AnalogRocks** · Posted: Tue Dec 15, 2009 12:22 am Post subject: