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Bitwize
Joined: 09 May 2008
Posts: 83
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| Posted: Sat Jun 05, 2010 4:50 pm Post subject: |
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Just received a new Green neck board from Curt, with the resistor to bridge pin 7 to ground...
Green focus is still not going well. For example, with the internal cross hatch pattern, the horizontal lines are fatter than those focused by Red and Blue. The vertical lines seem to be comparable to Red and Blue (maybe?), but horizontal just won't tighten up.
It seems that Green is being driven too hard, as the horizontal lines will focus better with contrast at 25. But forget about going up to 50-55. Any other ideas???
Fortunately, my wife has not left me yet, although she is spending more time away from me since the projector "issue(s)" surfaced 
Oh, my 9500LC is an Ultra. Any upgrades over the standard 9500LC that may help to remedy this focus issue?
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Sat Jun 05, 2010 8:25 pm Post subject: |
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long shot but check the HV wires. make sure the one from the power supply is going to the port labeled IN
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Bitwize
Joined: 09 May 2008
Posts: 83
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| Posted: Sat Jun 05, 2010 9:02 pm Post subject: |
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| draganm wrote: | | long shot but check the HV wires. make sure the one from the power supply is going to the port labeled IN |
I don't see the IN label (covered up? scratched off?). I cross-referenced my HV splitter with the picture on CZ Eddie's "Electrohome Marquee Teardown" article (On Curt's site) and everything seems to check out. All the HV wires seem to be going where needed.
Thx for the suggestion though!
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Sat Jun 05, 2010 10:01 pm Post subject: |
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I still say give the neck a few good taps with a short piece of a wooden broom stick while the PJ is running. Keep the cover off where you adjust the CPC rings.
its easier to tap the neck while those are off more of the tube neck is available. the crud will snap and burn off in a cool light show. i had a few thomas tubes
that focused weird till i did that. Even if packed well there is still vibrations that can shake free pieces of corrosion or other contaminates between the grids or pins in the guns during shipping.
Athanasios
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Sun Jun 06, 2010 12:06 am Post subject: |
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I know, I'm just a AmPro guy but, is there a chance the focus yoke is loose on the tube neck and moved durring shipping?
Ok, back to my regularly scheduled movie (on one helleva slick 4600HD) 
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Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
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Bitwize
Joined: 09 May 2008
Posts: 83
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| Posted: Sun Jun 06, 2010 1:39 am Post subject: |
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| Nashou66 wrote: | I still say give the neck a few good taps with a short piece of a wooden broom stick while the PJ is running. Keep the cover off where you adjust the CPC rings.
its easier to tap the neck while those are off more of the tube neck is available. the crud will snap and burn off in a cool light show. i had a few thomas tubes
that focused weird till i did that. Even if packed well there is still vibrations that can shake free pieces of corrosion or other contaminates between the grids or pins in the guns during shipping.
Athanasios |
OK, I did the tapping, but no light show However, I observed something interesting concerning focus...
Using the internal crosshatch pattern and the static focus adjustments, the center of Green is set at 2. The Red horizontal lines are more focused (not as fat) than Green at the center, with a setting of 52. BUT I now see that Green is sharper at bottom center than Red.
I cannot get the center Green to go any sharper than a setting of 2. Actually, a setting of zero is probably the same. It's like I don't have enough range, as I need to go lower. Anyhow, I'm starting to talk in circles.
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Sun Jun 06, 2010 9:39 am Post subject: |
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Will you at least look and compare the position of the green focus yoke on it's neck to the red or blue?
I'm sure it would not be the first time someone forgot to tighten a clamp when they were done swapping a tube
You say you don't have enough range of electronic focus. If the coil is out of position, you will not have enough range of electronic focus.
I'm going to read this thread from the beginning now. One question: Is this your first CRT projector? I just want to make sure we're not confusing electronic and optical focus.
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Chip
A Barco is only a AmPro with training wheels
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Sun Jun 06, 2010 9:49 am Post subject: |
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I think the best clue to this problem is in the following.
"Green focus is still not going well. For example, with the internal cross hatch pattern, the horizontal lines are fatter than those focused by Red and Blue. The vertical lines seem to be comparable to Red and Blue (maybe?), but horizontal just won't tighten up."
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Chip
A Barco is only a AmPro with training wheels
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Sun Jun 06, 2010 12:59 pm Post subject: |
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| stefuel wrote: | I think the best clue to this problem is in the following.
"Green focus is still not going well. For example, with the internal cross hatch pattern, the horizontal lines are fatter than those focused by Red and Blue. The vertical lines seem to be comparable to Red and Blue (maybe?), but horizontal just won't tighten up." |
Your right chip, this is the best clue. The focus waveforms come from the CLM. That could be it since he says the H lines are the ones not in focus. But i dont thing a bah HDM would cause a focus issue but it could be?
Athanasios
_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
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Bitwize
Joined: 09 May 2008
Posts: 83
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| Posted: Sun Jun 06, 2010 6:16 pm Post subject: |
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We touched up astigmatism, zone focus, and optical focus. It seems as though a "U" or "V" shaped area in the upper half of the screen will not focus as well as the bottom half. Contrast is set to 55. Please see the screenshot attachment.
| Description: |
| Green Focus Pattern - Notice better focus at bottom center and sides. |
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495.78 KB |
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5395 Time(s) |
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Sun Jun 06, 2010 6:23 pm Post subject: |
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Have you looked into the lens with sunglasses on to confirm this issue is on the tube face, and not an issue with Scheimpflug, which is an optical issue?
BTW, what contrast setting was that pix taken at?
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Nashou66
Joined: 12 Jan 2007
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Location: West Seneca NY
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Bitwize
Joined: 09 May 2008
Posts: 83
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| Posted: Sun Jun 06, 2010 6:50 pm Post subject: |
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| Curt Palme wrote: | Have you looked into the lens with sunglasses on to confirm this issue is on the tube face, and not an issue with Scheimpflug, which is an optical issue?
BTW, what contrast setting was that pix taken at? |
Contrast at 55. It's not an optical issue as we looked at the tube face and the image matched what we are seeing on screen.
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Sun Jun 06, 2010 7:00 pm Post subject: |
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It's got to be the tube then. Can't see it being anything else at this point.
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Nashou66
Joined: 12 Jan 2007
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Sun Jun 06, 2010 7:30 pm Post subject: |
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I don't defocus blue. Not one bit. In fact, when adjusting focus, I adjust for the point where the section under adjustment gets darker, which is the point of sharpest focus.
I'm pretty sensitive to blue halos. Meaning, I see them when they're there, and they bug me. So I go for sharpest blue focus and
accept the fact that this can result in slight variations in color temperature across a white screen.
CJ
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Bitwize
Joined: 09 May 2008
Posts: 83
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| Posted: Sun Jun 06, 2010 8:18 pm Post subject: |
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| Nashou66 wrote: | One last thing to try and not sure if this was done yet.
Swap every connector from red to green, HV,HDm,VDM, Astig, FCM, and G2 plus Video connector. If its still there then its definitely the tube.
Athanasios |
Tried most of what you've suggested. It's looking like the tube 
Thx for all your suggestions, Athanasios!
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Bitwize
Joined: 09 May 2008
Posts: 83
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| Posted: Sun Jun 06, 2010 8:22 pm Post subject: |
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| cmjohnson wrote: | I don't defocus blue. Not one bit. In fact, when adjusting focus, I adjust for the point where the section under adjustment gets darker, which is the point of sharpest focus.
I'm pretty sensitive to blue halos. Meaning, I see them when they're there, and they bug me. So I go for sharpest blue focus and
accept the fact that this can result in slight variations in color temperature across a white screen.
CJ |
??? I'm having trouble with the Green focus, not Blue. My previous screenshot shows the trouble focusing Green in the upper half of the screen...in a "U" shaped pattern. The bottom half is much more acceptable.
Also, Blue is currently NOT defocused. Thx for the post though 
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Sun Jun 06, 2010 9:51 pm Post subject: |
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| Bitwize wrote: | | Nashou66 wrote: | One last thing to try and not sure if this was done yet.
Swap every connector from red to green, HV,HDm,VDM, Astig, FCM, and G2 plus Video connector. If its still there then its definitely the tube.
Athanasios |
Tried most of what you've suggested. It's looking like the tube
Thx for all your suggestions, Athanasios! |
But did you try it all together?
Athanasios
_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
One Smart Dog!!!
Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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