CurtPalme.com Home Theater Forum

[barclay66]

Hi,

I would recommend taking out the CMM module (above the CLM; behind slot cover). That eliminates another element that could influence the video signal. BTW: The test patterns can be accessed pressing # on the remote...

Regards,
barclay66

[mp20748]

[cmjohnson]

I remember having problems with a CMM once. As I recall, it was causing some similar issue. But it's been a while. I don't remember all the details, but I remember I took the CMM out and didn't put it back in, lacking a good spare.

[thewolfman]

I found the problem. The G2 leves seems reversed, so I had to ramp it up all the way to 88 to bring out the image. No wonder it was hidden.

Brightness are at 50 and contrast at 50 and wonder if I can ramp them up to 70 because the image seems dim also.

Must tweak some more because my image has ghost pattern in them now indicating I have way to much brightness or contrast. But the room conditions are not good it's summer and will not get much darker.

So, maybe we have gotten somewhere now.

To be clear: It's fully modded now!


Anyway, I must install some stock VNB to see how the image looks then. Will it have an appearance of being dim or not.

I feel bad for becoming the bad guy that's not my nature.

I have 10 images to post and will soon must walk the dogs.

[cmjohnson]

If you've got G2 levels up in the 80s or 90s on all three tubes to get a good image, something is wrong.

Either the G2 drive voltage from the LVPS is low, or all three tubes are very old and weak. But if they are that old and weak,
they should be pretty well worn.

Tubes that are mid life should have G2 settings in the 60s based on what I've seen in a couple dozen working Marquees.

If you have a spare LVPS, stick it in there and recheck color temp settings.

But first, you might want to do a complete projector initialization. Reset everything to default and start over.


I recommend setting G2 and drive when brightness and contrast are both at 50.

[thewolfman]

The tubes are new except blue which has mild wear and I usually have G2 at around 57-63 so that is accurate. And G2 set with brightness and contrast at 50 and left them there.

Anther initialization could be useful and can make another.

And I do have another LVPS somewhere.

Ok, some images that shows ghost pattern for the time being. Something is up with the brightness and contrast for sure.



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[mp20748]

Put the contrast at 70, brightness 50

[thewolfman]

Putting contrast to 70 changes very little and still very dim. I removed the zone contrast board and that did nothing so I put it back again. I like that board also.

Now I discovered that my blue tube can't handle G2 higher than 66 because it went nuts now and went very noisy on all three channels. So the blue step pattern have 3-4 blocks that are pitch black now.

I will try swapping the LVPS soon.

[barclay66]

Ahem,
G2 voltage generation and control are located inside the HVPS, not the LVPS...

[thewolfman]

No big deal I swap both then. But a project for tomorrow.

After that I'll swap the VNB for an older set of MP VNB. I have only 2 of them working so I will need a stock for the third.

EDIT: Now that I can see the image I tried 1080p@60Hz and it looks exactly the same as 800p. Kind of dim.

But will give blu-ray 1080p a chance too so to get it out of the way, next week. I can buy one and return it later.

[cmjohnson]

Correct, G2 is generated in the HVPS. My mistake, my typo.

[cmjohnson]

If the G2 power supply is weak, when it reaches its limits, its output will become noisy and that noise will be seen in all three CRTs.
You mentioned that you could only get G2 up to 66 before the blue tube "went nuts" and it's the only older tube
of your set of tubes.

This all makes complete sense. An older tube needs to be driven harder, requiring more current, and when G2 reaches 66 on the
blue tube, that defines the point at which the G2 supply is breaking down.

Swap out the HVPS and odds are that this will solve several of your issues.

[thewolfman]

Ok, I swapped the HVPS and still the same dull image.

I swapped the LVPS after and that made no change either.

No, I think that these new VNB are the culprit and not the VIM 02, swapping them for the old ones will show that.

Unless swapping the CLM will solve that and will try that also.

But feel confident that the new modded VIM 02 will work with any VNB so that probably is a very good up grade.

[cmjohnson]

Did you redo the color temperature settings after swapping the power supplies out? G2 and drive)

[thewolfman]

Yes I was able to raise blue G2 to 70, but from precaution as I needed more, but never reset the pj. I figured it was because it was cold that it was stable. The left borders are gone again with PC hooked up.

Yesterday, I tried with nothing hooked up and internal frequencies but was unsuccessful alingning anything else but the lowest one. It said I must disconnect something but there was nothing to unhook. Unless I must disconnect the moome as well.

How ever.. I swapped the VNB to the old MP ones + new modded VIM 02 and still the same dull image. Blue G2 still at 70.

I then finished the route with making exactly like it was before, with installing my old modded VIM 03 + old MP VNB and now it works again. The left frame borders on menus are back.

I of course lowered the G2 levels back to where it used to be. Nice and bright image now too.

Ironically, my G2 levels are a bit high on an almost brand new green tube from Curt, at 73. Red also new, at 66 + worn blue with 61. It sounds weird but those are correct numbers! Not dull anymore and ghost pattern went away as I corrected the G2.

So I must buy that blu-ray player next week to confirm yet again with that. I hate to say it, but as it sits now, the entire new unit is faulty. I hope I am wrong about this but don't think so.

I'll test more next week with different combos + player.


EDIT: The G2 were set with brightness + contrast at 50. I tried setting drive too but that went nowhere either.

[mp20748]

Now with all the try-this-that and the other, we still haven't determined if the problem is on the Vim or the neck boards. You initially said the neck boards were good, and the VIM was the problem, to later saying the VIM was fine and the neck boards is the problem, to now saying its both...

What I need for you to do, and it can happen here is to pick a time when you can spend more than 5 minutes while I walk you trough some things.

I want to get to a second option of either you sending the boards back to me, or we find someone on that end that can try them in their Marquee.. But first things first.

[thewolfman]

I have no problem sending it all back next week to you, but will buy that stand alone blu-ray player first. We can arrange a time and date when we chat on e-mail with suggestions you have.

And I will try and document better and not make a mess of things. So you need to forget about the first half of this thread when I thought it was the VIM causing this. When everything white was black.. it was because the of the G2 levels obviously.

[mp20748]

Sounds like a good plan - thank you, and know that I'm in this to make you happy with those boards.

[thewolfman]

Thank you as well for cooperating and know that I'm not mad at you. I was at first but as soon as I knew the warranty was solid I cooled down. Early Monday I'll buy the player and we can chat then.

The time here is 02:21.. btw. Think of time that fits you I always have time you may not.

[barclay66]

Hi,

As I'm located in Europe and as I happen to have a test machine available, I would be able to test the boards and determine their status...

Regards,
barclay66