CurtPalme.com Home Theater Forum

[joepke]

Hi Guys,

I bought a Barco 1209s SEOS modified projector from Curt. (Somewhere in 2008 i believe)
Shipped it all the way to the Netherlands.
Have had an issue with the green tube for a long time but i never really got to the bottom of it.
Anyway i think its time to see if i can fix it with the help of some of the experts that are here on the forum.

First of all my projector is 100% in line with my pjscreen.
The issue i experience is that if i display an image with only the green tube switched on, it is either the sides (top,bottom,left,right) edges that are in perfect focus or the center part of the image.
For example.
To have optimal center focus i set the electronic focus level to 63%
To have the edges in optimal focus i have to set the electronic focus all the way up to 83%.

When the electronic focus is set correctly i can see the scanlines. So i know my optical focus is set correctly.
I have a binocular that i use to make focus adjustments.


I also checked the G2 settings. When i dive in to the service menu/G2 settings. I see that all my corresponding G2 neckbord led's are switched off.

I swapped the Quadrupler the Horizontal deflectionbord and the new style EHT board but that all had no effect.

Any help to help me solve this problem would be appreciated.

[Curt Palme]

So you're saying you can adjust the center electronic focus to either be sharp in the center, but the edges are blurry, or, you can set the edges to be good, but then the middle is out of focus?

if so, the focus/H shift board is most likely bad. I've seen that before.

[Curt Palme]

So you're saying you can adjust the center electronic focus to either be sharp in the center, but the edges are blurry, or, you can set the edges to be good, but then the middle is out of focus?

if so, the focus/H shift board is most likely bad. I've seen that before.

[joepke]

Hi Curt,
Thanks for your quick reply.

[Curt Palme]

Sure, email me at curtpalme at shaw.ca

[Curt Palme]

Sure, email me at curtpalme at shaw.ca

[joepke]

So i received a new focus/H board from Curt but unfortunately this doesn't solve the problem.

I once again checked the following parameters:
-optical focus (correct)
-EM focus(i can only get the center part in perfect focus or the edges but not simultaneously. )
-Astig
I checked the astig settings to make sure they are ok. I used the NEC monitor program. it wasn't perfect but it isn't bad either.

The only other thing is that it is not only the green tube that has this issue but the blue and red one has it to.
Thanks to the NEC program (readability option).


I noticed that if i use the projector to generate a # pattern by it self. (say ordinary PAL 720x576 50hz) this issue is not really there. (and everything is within focus)
Im kind of running out of ideas what to do next.
I read through lots of posts on this forum and also read Guy Kuo's "holy focus" article but none of them solve my problem.

Could it still be something in the HV chain? I remember having a dead splitter a few years back. Curt send me another one.


PS: on the forum i saw a screenshot of what looked like a sum up of all voltages running through the projector.
Is that menu item also present on the 1209s?

[CasetheCorvetteman]

Thats a 909/Cine9/CineMAX that will give you all that on screen, i dont know that a 1209S can do it or not.

Have you got another quad? My CineMAX had some wierd focus issues with the quad rooted, some zones would simply not correctly focus, but their state of focus would change with the center focus.

[joepke]

Hi,
thanks for you quick reply.
Nah i don't have a spare quadrupler. I would probably already swapped it if i had one.
But it could very well be the quad. When i set my center focus +++ then the edges are coming in focus. (but the center isn't any more)
So it looks like its an HV issue.
Perhaps i should just swap the entire HV part and rule out the defective component.

One more thing. What do you suggest is a good resolution/framerate for the 1209s?
My current setup is an oppo BDP83 with SDI mod and a vp50pro with SDI option. Then it's hooked up with RGsB to the Barco.

cheers.

[ElTopo]

Try 817p@72Hz. Should be sharp and smooth

[CasetheCorvetteman]

1920x1080p at 60 or 72Hz is razor sharp on my CineMAX.

1920x817p is useless for 16:9 movies, its only useful for 2.35:1.

[joepke]

Thanks everyone for thinking along.
It is appreciated.

What about Oppo 1080p 24hz >>vp50pro >> 1080p 72hz >>barco 1209s

[ElTopo]

You have a 16:9 or scope screen ?

[joepke]

I have a 16:9 screen. Bare in mind that our country (the Netherlands) is a subtitle minded country. (no audio dubbing)
So with a lot of movies subtiles are placed half in the active image and half in the black bar at the bottom.

[CasetheCorvetteman]

A CRT is wasted 2.35:1 screen, youre better off masking the 16:9 for 2.35:1 when you watch something in that format, instead of putting boarders at the sides of the 16:9 screen and using way too small a tube face area.

[joepke]

Does anybody has some new ideas to solve the focus issue?

[CasetheCorvetteman]

You swapped the quad and splitter again yet?

[joepke]

I just emailed Curt to see if he can send me a new quad and splitter.
Hope that will solve it.
In the mean time. Is there another way to find out if the voltage from and after the quad is correct?
Thanks.

[Curt Palme]

Guys, I'm on 2 hours sleep (had a GREAT date! ), so I'll fire this out there.. (forgive me if I don't make sense, I really need another 5 hours sleep...then again, I NEVER make sense!)

-are the R and B tubes completely in focus? if so, then try switching the R and G focus yoke leads. They unplug right under the focus yoke, and are long enough to swap.

It will be tougher to adjust the focus, since the tubes switch on and off when a certain color is selected, but you should be able to get a feel for where the focus should be set. All you need to check is if the problem now switches to the red tube, and the green tube is OK.

If it's on all three tubes, I really can't see this being an EHT/G2 issue, since the HV affects overall focus potentially, not just the sides.

[Curt Palme]

Guys, I'm on 2 hours sleep (had a GREAT date! ), so I'll fire this out there.. (forgive me if I don't make sense, I really need another 5 hours sleep...then again, I NEVER make sense!)

-are the R and B tubes completely in focus? if so, then try switching the R and G focus yoke leads. They unplug right under the focus yoke, and are long enough to swap.

It will be tougher to adjust the focus, since the tubes switch on and off when a certain color is selected, but you should be able to get a feel for where the focus should be set. All you need to check is if the problem now switches to the red tube, and the green tube is OK.

If it's on all three tubes, I really can't see this being an EHT/G2 issue, since the HV affects overall focus potentially, not just the sides.

[Curt Palme]

Oh, one more thing: Pull out the convergence tray, and take out the astig output board. With the tray floor mounted with the motherboard contacts away from you, it's the board on the left. you should be able to take that out without affecting operation of the set (losing astig settings of course), but see if the focus gets better.

[Curt Palme]

Oh, one more thing: Pull out the convergence tray, and take out the astig output board. With the tray floor mounted with the motherboard contacts away from you, it's the board on the left. you should be able to take that out without affecting operation of the set (losing astig settings of course), but see if the focus gets better.

[macgyver655]

[joepke]

Hi,