CurtPalme.com Home Theater Forum

royuk · Joined: 28 Dec 2007 Posts: 41

It's my Barco 1209s.

This line can be seen, from top to bottom, left of center on red and blue tube. I think the green also!

Shows on screen, especially in light coloured/movement scenes as a dark/light shadow like line.

Anything to do with the pj previously having an smps short/controller cable/some picture cable getting nicked on hinge cover?

or is it a phosphor tube burn?

In researching, a similar issue was caused by the line doubler, not applicable here and an 'earth' problem with the hinge cover?

Ile · Posted: Mon Feb 11, 2008 9:05 am Post subject:

I don't think this is related to your other problem.

Have you tested with other source or other resolution?

What happen if you adjust Hphase?

I understanded that problem is bigger in red/blue, so problem might have something to do with too much convergence adjustment for red/blue.

Can this line be seen when convergence adjustments are zeroed? How about geometry adjustments?
Maybe raster widths just need adjustment from coils...

How good horizontal linearity looks with grids?

royuk · Joined: 28 Dec 2007 Posts: 41

Hello Ile,

Thanks for replying!!

Firstly, i have tried with std dvd over component and hd/blu-ray hdmi through hd fury. All sources into the pj via the rgb inputs. They all show the same line.

When you adjust Hphase the pic moves but line stays in the same place.

The line is visible on ALL colour tubes.

I have been able to make the line a bit less visible by re-adjusting/centering the raster and active picture within that as well as physically moving the pj as it was previously off by a few inches.
However i can't get rid of the line. Tried adjusting geometry with no effect. The line doesn't line-up/match with any of the convergence grid lines.

As for adjusting raster widths from the coils i would need guidance to do that.
From the above info would it make any difference?

I changed horizontal/vertical linearity, again no effect.

At this point i have run out of electronic adjustments i can think of to adjust!

If the pj was used previous in a blend set-up would this have done anything? eg. to the tubes.

The only other option is something wrong with the vertical board or the rgb input stage perhaps.

Hopefully in April if all goes to plan a professional calibrater will be helping me set the pj up from scratch which could help. Then again it may make it worse!

If you have any other ideas i will try them out!!

Regards

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

Is the line there on the identification screen or internal menu screens?

royuk · Joined: 28 Dec 2007 Posts: 41

Hi

Thanks for showing interest, as i'm running out of options fast and apart from this 'line' the barco is showing a fantastic image.

As far as i can tell the line isn't visible on any barco menu or the Blu-ray logo screen from the player.(though this is blue so it may be harder to see it?)

However the line is obviously more visible on light coloured backgrounds and especially movement (screen pans).

When there is a static image and depending on colours in the scene it's hardly noticeable but then as soon as the pic moves and runs into lighter backgrounds the line hits you and that is the problem.

One minute you are lost in the movie and then all is ruined when the line shows.

The line is static and does not move, its the picture that moves across it!!

hope this helps!

**Curt Palme** · Posted: Tue Feb 12, 2008 7:21 pm Post subject:

Try this:

1) Pull the convergence board and see if the line goes away. The set will be out of convergence, but the line might be gone.
2) Bad yoke/scan reversal board (I doubt it)
3) Bad H output board if the convergence board doesn't fix it.

I have not seen this problem before, but I have all of the spare parts you need.

royuk · Joined: 28 Dec 2007 Posts: 41

Hi Curt,

Priveleged to have your help!

Just finished trying out something and might have made what i prey is an important discovery!!!!

I tried using s-video from the blu-ray player.

The line was there as usual but after close inspection i found out something which i was able to check and confirm with the convergence grid on this input.

Unlike the std dvd component and blu-ray hi def convergence grids, one of the off center convergence grid lines on the s-video input matches exactly the position of the 'line' i'm seeing. YES, matches and when looking at the line on screen from this input i can see red, green and blue (spaced more from the other colours) faint vertical lines . It seems they are making the 'line' on screen, inparticular the green which is making the bulk of the line as it's thicker.

Hadn't time but should i perhaps converge this s-video input to see if it has an effect.

I do not have the s-video cable normally connected so without it, the line still shows on screen.

If i have this correct, what next??

picree · Joined: 31 Mar 2006 Posts: 351 Location: Johnson City, TN

I sort of scanned this thread and thought of a problem Curt's forum helped me with recently. Part of the troubleshooting included flipping the switches inside the projector from ceiling mount to floor mount to see if the problem switched from slightly on the left to slightly on the right.

That will isolate the problem as a problem in the source video chain Wink

**AnalogRocks** · Posted: Wed Feb 13, 2008 1:36 am Post subject:

royuk · Joined: 28 Dec 2007 Posts: 41

Picree, I can try this out but will take another day or so before i get time.

Shocked

Analogrocks, i'm glad i didn't find that in there!!! Laughing

JAM · Joined: 11 Mar 2006 Posts: 13 Location: Finland

I have same kind issue in my 808s.

royuk · Joined: 28 Dec 2007 Posts: 41

Sorry, i know it's taken a few days but i have just flicked the horizontal scan reversal switches and the line has moved to being more on the right side now. With the picture being out of convergence i can clearly see a red and green vertical line where the line is showing. Same as when looking at the s-video input.

So what can we conclude from this?

Is it a 'burnt-in scan line'?

Do i still need to pull the convergence board?

Ile · Posted: Sun Feb 17, 2008 7:22 pm Post subject:

royuk · Joined: 28 Dec 2007 Posts: 41

Thanks Ile,

I really hope the tubes are ok. This has been my biggest worry.

Will try the convergence board tomorrow.

Smile

royuk · Joined: 28 Dec 2007 Posts: 41

Things are looking up i hope!

Removed the convergence tray and the line has gone!!

What next?

Is there anything i can get checked by a test engineer at my place of work where we assemble circuit boards?

And Thanks so far to everyone for their help!!! Thumbs Up

Ile · Posted: Mon Feb 18, 2008 10:19 pm Post subject:

Probably convergence driver board is causing that problem. It could just need calibration, but that is bit tricky and takes long time. Convergence tray need to be placed to riser board, so it can be scoped and adjusted while projector is running.

Could be just easier to buy one. 808 and many 120* projectors use same R762518 board, so those would be easily available.

charlez · Joined: 16 Nov 2006 Posts: 78 Location: Belgium

JAM ?

Is your problem the same as here ?
http://home.c2i.net/tomcat/1209.htm

JAM · Joined: 11 Mar 2006 Posts: 13 Location: Finland

dbaisey · Posted: Tue Feb 19, 2008 7:22 pm Post subject:

I don't know Barco's but you might check if the line moves out of the way when changing side blanking. I have seen wide rasters reflect back into the image. Doug

royuk · Joined: 28 Dec 2007 Posts: 41

Thanks yet again Ile!!

Waiting for a reply on cost/availability of the R762518 board.

Have one thing to try out in the meantime.

Doug (dbaisey). Interesting suggestion. Can try it out.