CurtPalme.com Home Theater Forum

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

Mistake quoted myself, deleted.

dturco · Posted: Wed Jan 13, 2010 4:29 am Post subject:

What's the fuss all about, now I can get to the root of it. Neutral

**AnalogRocks** · Posted: Wed Jan 13, 2010 6:53 am Post subject:

backslap · Joined: 26 Jan 2009 Posts: 36 Location: the netherlands

So. I've got the convergence timing corrected now, but the red lines are still a little too thick on the left side. Something I've noticed before is that electronic / dynamic focus was adjusted to 0 there when I got the PJ but changing it all the way up to 100 and everything in beween didn't really improve it.

Could there be something in this Super Secret Menu, such as 'fucus timing' or something that could make this better?

Grtx, Elwin

cmjohnson · Joined: 03 Apr 2006 Posts: 5180 Location: Buried under G90s

Yes, just look. Focus and astig have their own delay timing adjustments as well.

CJ

nuttall_chris · Posted: Wed Jan 13, 2010 12:54 pm Post subject:

backslap · Joined: 26 Jan 2009 Posts: 36 Location: the netherlands

Nuttall_chris, I agree that it sounds like a scheimpflug problem, but my theory is that while the image looks sharp on the tube from close range, it might still be just a little bit off. Believe me, I've fiddled around a lot with the scheimpflug but there's no way I can get it right like that.

Cmjohnson, alright, I will look. Do you believe the dynamic focus could be corrected this way, though?

Grtx, Elwin

EDIT:

Nutall_chris, I've rechecked the red tube face and you are right: I can see scan lines in the middle and on the right, but not on the left side of the tube! I should have looked better.

backslap · Joined: 26 Jan 2009 Posts: 36 Location: the netherlands

So. I've just tried adjusting the Focus timing but I couln't see any difference...

Do you guys think my problem with the red tube could be solved by doing a complete magnetical setup like so: http://www.curtpalme.com/docs/MARQUEE%20MAGNETICS%20SETUP%20101%20by%20Bill%20Blue.pdf

Or could my focus board be broken?

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

Backslap, here is a way to see if your scheimpflug is off and if its an electronic issue. Take a piece of whit card board or that white foam board, a nice 12x12 piece is best. go tot he side of the screen it is not focused well and move the card closer to see if you can get any focus, if it does then you need to adjust scheimpflug, if not you have an electronic issue since if its not focused on the tube that un focused grid will transfer to the screen/Card.

Athanasios

nuttall_chris · Posted: Wed Jan 13, 2010 3:18 pm Post subject:

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

backslap · Joined: 26 Jan 2009 Posts: 36 Location: the netherlands

Hey guys, thanks for the suggestion but I already tried that and it has no effect.

I've adjusted scheimpflug a numer of times, I also tried if screwing all the bolts out a few turns, or in a few turns made any difference but it doesn't. On a 31KHz signal I can see scanlines all across the screen, just slightly less obvious on the left side, but on a 120KHz signal there are definitely no scanlines on the left and tje lines on the left just get so thick that when I converge the PJ on a crosshatch, the red sticks out of the white on both sides.

Let me make it clear that this isn't obvious when viewing a movie, but you guys know how it is with these things, right! Wink

EDIT:

Also, Nashou66, I saw in another thread that you've done the magnetics alignment and you warned about doing it on the floor and having to do it all over again on the ceiling. How would you advise I align my PJ magnetically? Just on the ceiling then?

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

backslap · Joined: 26 Jan 2009 Posts: 36 Location: the netherlands

Where can I find the focus cables?

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

backslap · Joined: 26 Jan 2009 Posts: 36 Location: the netherlands

We have a winner!

What do I do about this? Get a replacement for the whole board of can I do something about this myself?

By the way, this isn't exactly related to Convergence timing anymore. Should I open a new thread for this?

Grtx

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

your correct, if you look to the my marquee maintenance thread i have the solution there, but it could be caused by another problem. The mosfet amps that switch in and out certain caps for the higher bandwidth resolutions are not working. I fixed it for a little while but it went out again. so i still need to track it down.

id just look for new board, in the buy and sell section there was some one selling it cheap, or Curt can get you a known working one, its probably the cheapest board to have go bad, so your lucky.

Athanasios

garyfritz · Joined: 08 Apr 2006 Posts: 12088 Location: Fort Collins, CO

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

cmjohnson · Joined: 03 Apr 2006 Posts: 5180 Location: Buried under G90s

Yes, or just hit COLOR 2 and do your adjustments on green only.

You would want to intentionally misalign the grid (shift the focus and astig so they're NOT sharp) so you can see best how they work
when you change the delay settings. It doesn't do much good to have everything already turned to the sharpest settings, not when
setting the delays. You need to see WHERE the adjustments are working on the screen for this, not try to make those misadjusted zones
look their best with this adjustment.

It's very important to realize that. When setting delays, you are NOT tuning for best picture. You're putting the active adjustment zones
where they need to be.

As has been mentioned earlier, there are trim pots on some of the related boards. Some of them are used to match up the delay
timing between one color and another.

CJ