CurtPalme.com Home Theater Forum

[stridsvognen]

At a time i noticed that there was some points where the old non ultra and the ultra had some differences, specially how they had organised, the cables, and different grounding.

First a Picture of how the cables to the different coils were twisted together on my Ultra, im not sure if it makes any difference, better or worse, but i did separate them like in my non ultra.

I also moved HV leads and coil leads as far apart as possible, mine came with all in one Stack together under the HV leads, right in front of the splitter.

[stridsvognen]

Then i put the ground cable on the vertical board like on my non ultra, there is a ground pin in the top right corner of the board, it was not used.

I made the ground cable to the Convergence/ stigmator board.

I removed 2 of the ground cables from the neck boards to the back plate, and grounded the neck boards directly to the chassis.

When testing it was clear that something changed i got more light output on a 5% IRE test pattern.. lokking on the tube while putting ground on off.

Im not sure i have not made any ground loop, but im sure its now grounded, and i think this might work.

[Nashou66]

Yeah I found there was more weird distortions in the image when the convergence and astig cables and VNB cables were all twisted together. I found out it was due to the Astig cables and the noise in them. the ferrite clamps fixed the issues but i still left it all loose.


Also move the HV spliter box up. Flip the plastic cover under it around so the HV splitter is at the top of that pannel and not right next to the VNB. It was a tech bulletin.

Also move that HDM cable bunch to the red away from the Back board. run it over the top of the focus board.


Nashou

Opps I was wrong, leave it as is. I was wrong it used to come up higher and lowering it fixed it.

Nashou

[Nashou66]

Oh and the P22 is the 9 inch version of P43 of the 8 inch tube. its the fast persistent Green phosphor for stereoptic use or 3D. So calibration will be all messed up and lower light output. Put Curts new Green in and you'll be good to go.

nashou

[stridsvognen]

Is there anyone that have the diagram, and component list for the Ultra convergence board, it would be a great help to get that one up running.

[stridsvognen]

[Nashou66]

For the convergence board there is a thread here on how to convert the normal rear heat sink boards to Ultra boards. I think for the CLM as well. But added software may be involved there.

Nashou

[Nashou66]

[stridsvognen]

[mp20748]

[stridsvognen]

Mike..

The goal is for me to be wiser, and 2nd to improve the image.

I dont know everything, and it all started with the extremely bad focus, and the green gamma run.

Standard i would drop this ULTRA in the bin and be more happy with my JVC, but i have my non ultra, and with different, and much better experience and Picture quality.

Now with all this changing boards, and stuff i now have a idea what i dont want in my ultra.

From extremly fussy focus, i have now seen scanlines on the tube with 1080P 60hz at 5-15% IRE. well then i f*ck*** up and let smoke out of the convergence board, so thats status right now.

So in the ende i hope this CRT will be my favorite projector instead of just putting it in a corner accepting that its not worth looking at.

So when no one can explain me why the resolving power is so bad on this machine, and why the green gamma is f*ck***, i have to find out myself.

I know it dont sound positive to mess up a 800hour 2003 ULTRA, but for me there is nothing to Loose and everything to win.

If it had just performed like my non ultra, or a bit better i would never have touched it.

[Nashou66]

Kurt did you notice where we said the Green tube is the fast phosphor type like the P43. It wont get the same gamma or color calibration as your other machine and those tubes do not focus as well at higher Contrast levels. These were used in simulators that have smaller screens that what you have. So they did not need to be bright.

Lesson learned, if things seem weird check the type of tube first .

Nashou

[mp20748]

Playing around with the wires is what I was referring to. Because some things are just best left alone.

If you were playing around in an 1995 or 1997 Marquee, what you have been doing with the wires would make sense. But on the later ones, especially from VDC, there's no need to get that involved with the cables (the HV cables are different and better). You'll not going see or get any real differences, mainly because some of the noise problems that's related to the cables and the chassis design can not be so easily fixed by just moving the cables here and there.

For instance, the HDM emits noise into the neck boards, and if you'll not trying to relocate the HDM away from the CRT neck boards, then going after the miniscule noise that's possibly also coming from the cables would be a waste of time.

There could be some merits in better grounding, but for some reason the neck boards and video chain seem to have no interest in whatever noise could be coming from the cables. Also, once you installed the convergence board ground strap, you solved most correctable problems associated with the cables and grounding. So there's no need to put Band Bides on stitches.

I've gone through all of this using both scopes and spectrum devices. And that's how I arrived at the ground strap fix.

[stridsvognen]

[stridsvognen]

[mp20748]

[Nashou66]

[stridsvognen]

Ill not accept that i got a machine that cant resolve, there is always a reason. I seen it, it went totaly hardcore 5 min before it smoked. so im exited to get the boards back and find out what did the difference.

It will have to be some specifik board or grounding or stuff that makes the difference, i doubt its just a part of the chassis nr.

[mp20748]

[stridsvognen]

I was looking for the mentioned thread about how to change a stigmator board into a ultra board, i would like to add those vima caps on my non ultra board to see if it will make a improvement.