| Author |
Message |
draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
|
| Posted: Sun Jun 06, 2010 10:00 pm Post subject: |
|
|
Could this be a problem with the Contrast modulation board? It seems like the zones with bad focus are falling into the CCM adjustment areas.
Robby remove the CMM and see if the problem goes away. It's right above the control module behind the panel, slides right out
|
|
| Back to top |
|
 |
stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
|
| Posted: Sun Jun 06, 2010 10:19 pm Post subject: |
|
|
OK, I've looked at the pictures and I still want to know if the focus yoke is tight on the tubes neck.
I'm done with this thread until someone confirms the problem is not mechanical. It's a simple test.
Pull the cover off and grab the yoke and see if it's loose 
_________________
Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
|
|
| Back to top |
|
|
Bitwize
Joined: 09 May 2008
Posts: 83
|
| Posted: Mon Jun 07, 2010 1:34 am Post subject: |
|
|
| stefuel wrote: | OK, I've looked at the pictures and I still want to know if the focus yoke is tight on the tubes neck.
I'm done with this thread until someone confirms the problem is not mechanical. It's a simple test.
Pull the cover off and grab the yoke and see if it's loose |
Hey man! I appreciate your suggestions. The focus yoke is tight and has been adjusted and readjusted to try and fix the focus problem. Still a no go 
|
|
| Back to top |
|
|
Bitwize
Joined: 09 May 2008
Posts: 83
|
| Posted: Mon Jun 07, 2010 1:47 am Post subject: |
|
|
| draganm wrote: | Could this be a problem with the Contrast modulation board? It seems like the zones with bad focus are falling into the CCM adjustment areas.
Robby remove the CMM and see if the problem goes away. It's right above the control module behind the panel, slides right out |
Ok, call me crazy, but I just took off the plate above the Control Module and there is no Contrast modulation board. There is no board at all above the CLM. The only other boards I see are mounted to the CLM: Deflection Processor and Stigmation Waveform boards.
|
|
| Back to top |
|
|
Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
|
| Posted: Mon Jun 07, 2010 2:50 am Post subject: |
|
|
|
Some sets have them, some don't. I usually take them out as Mike Parker says he's had more trouble than not with them. Couldn't remember if I took it out of that set, but unless you have tube wear, or are stacking or blending sets, you'll never need it.
|
|
| Back to top |
|
|
Bitwize
Joined: 09 May 2008
Posts: 83
|
| Posted: Mon Jun 07, 2010 3:19 am Post subject: |
|
|
| Curt Palme wrote: | | Some sets have them, some don't. I usually take them out as Mike Parker says he's had more trouble than not with them. Couldn't remember if I took it out of that set, but unless you have tube wear, or are stacking or blending sets, you'll never need it. |
It is stock on the 9500LC Ultra. Having said that...
The lower half of the screen looks more focused. The upper half ("U" shape) is less focused AND appears to be overdriven.
As said before, if I have contrast at 25, the whole pattern is more uniformly focused. With contrast of 50-55, the upper U-shaped half blooms, resulting in poor focus. The lower half still looks solid at 50-55.
Would not the Contrast Modulation Module allow me to change the intensity of the zones area in the upper half so they are more uniform with the lower half of the screen? The upper zones would look focused if they were not overdriven.
Seems like a reasonable theory. It's interesting that the Red and Blue are much more uniform and focused and they are both LCP tubes. The "new" Green LUG seems to have uneven output across the tube face.
|
|
| Back to top |
|
|
CZ Eddie
Joined: 23 Mar 2006
Posts: 1601
Location: Austin, TX
|
| Posted: Mon Jun 07, 2010 3:32 am Post subject: |
|
|
| Bitwize wrote: |
The lower half still looks solid at 50-55.
|
I haven't kept up with this thread. But if the top half is fuzzy & the bottom is fine, then that would indicate scheimpflug?
_________________
Back after a digital sabatical.
|
|
| Back to top |
|
|
Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
|
| Posted: Mon Jun 07, 2010 3:48 am Post subject: |
|
|
| CZ Eddie wrote: | | Bitwize wrote: |
The lower half still looks solid at 50-55.
|
I haven't kept up with this thread. But if the top half is fuzzy & the bottom is fine, then that would indicate scheimpflug? |
Its like that on the tube face.
I wonder what your individual zone Focus is for the green. have you guys looked there yet?
Some time an initialization of the set fixes weird anomalies. Might be time to start the set up from scratch.
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
|
|
| Back to top |
|
|
CZ Eddie
Joined: 23 Mar 2006
Posts: 1601
Location: Austin, TX
|
| Posted: Mon Jun 07, 2010 3:53 am Post subject: |
|
|
| Nashou66 wrote: |
Its like that on the tube face. |
Oops, I missed that part. 
| Nashou66 wrote: |
Some time an initialization of the set fixes weird anomalies. Might be time to start the set up from scratch.
|
I never bother to set up a projector without first doing a complete init and also zero everything out. Good advice. 
_________________
Back after a digital sabatical.
|
|
| Back to top |
|
|
Bitwize
Joined: 09 May 2008
Posts: 83
|
| Posted: Mon Jun 07, 2010 10:34 am Post subject: |
|
|
| Nashou66 wrote: | | CZ Eddie wrote: | | Bitwize wrote: |
The lower half still looks solid at 50-55.
|
I haven't kept up with this thread. But if the top half is fuzzy & the bottom is fine, then that would indicate scheimpflug? |
Its like that on the tube face.
I wonder what your individual zone Focus is for the green. have you guys looked there yet?
Some time an initialization of the set fixes weird anomalies. Might be time to start the set up from scratch.
Athanasios |
The zone focus values for Green (in the upper half, U-shaped area) are zero or near zero in all areas where Green is unfocused. The bottom half is around 32-36.
|
|
| Back to top |
|
|
Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
|
| Posted: Mon Jun 07, 2010 11:46 am Post subject: |
|
|
Hmmm, Now its one of two things, the Tube or the Focus coil itself. With the focus connector removed from the FGM the center of the tube should still focus well. The sides top and bottom might be off a bit but fairly close. IF everything goes fuzzy quite a bit then your Magnets in the focus coil are not strong enough and the windings can't compensate.
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
|
|
| Back to top |
|
|
stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
|
| Posted: Mon Jun 07, 2010 12:27 pm Post subject: |
|
|
I'm going to go along with crazy eddie on this one. I'd re-initialize the pig and do it again before I'd condem any of the hardware.
I can't begin to express how happy I am to have a continually problematic POS AmPro 
_________________
Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
|
|
| Back to top |
|
|
Bitwize
Joined: 09 May 2008
Posts: 83
|
| Posted: Mon Jun 07, 2010 12:49 pm Post subject: |
|
|
| Nashou66 wrote: | Hmmm, Now its one of two things, the Tube or the Focus coil itself. With the focus connector removed from the FGM the center of the tube should still focus well. The sides top and bottom might be off a bit but fairly close. IF everything goes fuzzy quite a bit then your Magnets in the focus coil are not strong enough and the windings can't compensate.
Athanasios |
So disconnect the Green connector to the Focus Control Module?
|
|
| Back to top |
|
|
Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
|
| Posted: Mon Jun 07, 2010 1:47 pm Post subject: |
|
|
| Bitwize wrote: | | Nashou66 wrote: | Hmmm, Now its one of two things, the Tube or the Focus coil itself. With the focus connector removed from the FGM the center of the tube should still focus well. The sides top and bottom might be off a bit but fairly close. IF everything goes fuzzy quite a bit then your Magnets in the focus coil are not strong enough and the windings can't compensate.
Athanasios |
So disconnect the Green connector to the Focus Control Module? |
Yes, it still should focus well. when looking on the tube face. The windings are just to make up any slack the actual magnets might lack due to drifting over time.
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
|
|
| Back to top |
|
|
Bitwize
Joined: 09 May 2008
Posts: 83
|
| Posted: Tue Jun 08, 2010 1:07 am Post subject: |
|
|
| Nashou66 wrote: | | Bitwize wrote: | | Nashou66 wrote: | Hmmm, Now its one of two things, the Tube or the Focus coil itself. With the focus connector removed from the FGM the center of the tube should still focus well. The sides top and bottom might be off a bit but fairly close. IF everything goes fuzzy quite a bit then your Magnets in the focus coil are not strong enough and the windings can't compensate.
Athanasios |
So disconnect the Green connector to the Focus Control Module? |
Yes, it still should focus well. when looking on the tube face. The windings are just to make up any slack the actual magnets might lack due to drifting over time.
Athanasios |
OK, interesting observation here...
Disconnected the Red and Green connectors from the Focus Control Module. The Red is still focused quite nicely! Green on the otherhand went VERY blurry...the crosshatch pattern lines are now 5 times thicker, uniformly across the screen.
So does this mean the magnets on the focus coil are hosed?
|
|
| Back to top |
|
|
Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
|
| Posted: Tue Jun 08, 2010 1:43 am Post subject: |
|
|
| Bitwize wrote: | | Nashou66 wrote: | | Bitwize wrote: | | Nashou66 wrote: | Hmmm, Now its one of two things, the Tube or the Focus coil itself. With the focus connector removed from the FGM the center of the tube should still focus well. The sides top and bottom might be off a bit but fairly close. IF everything goes fuzzy quite a bit then your Magnets in the focus coil are not strong enough and the windings can't compensate.
Athanasios |
So disconnect the Green connector to the Focus Control Module? |
Yes, it still should focus well. when looking on the tube face. The windings are just to make up any slack the actual magnets might lack due to drifting over time.
Athanasios |
OK, interesting observation here...
Disconnected the Red and Green connectors from the Focus Control Module. The Red is still focused quite nicely! Green on the otherhand went VERY blurry...the crosshatch pattern lines are now 5 times thicker, uniformly across the screen.
So does this mean the magnets on the focus coil are hosed? |
It does sound like a bad magnet structure. This can happen in any number of ways. the most common and I bet many people do this is store then next to each other. I keep mine about 4-6 inches apart from each other when in storage.
Keeping them right next to each other or touching can weaken the magnets.
Curt probably has lots of extras. Ask him to check the magnet strength this way for you before he ships.
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
|
|
| Back to top |
|
|
JustGreg
Joined: 07 Mar 2006
Posts: 3098
Location: Kenosha, WI
|
| Posted: Tue Jun 08, 2010 6:16 am Post subject: |
|
|
| Nashou66 wrote: |
It does sound like a bad magnet structure. This can happen in any number of ways. the most common and I bet many people do this is store then next to each other. I keep mine about 4-6 inches apart from each other when in storage.
Keeping them right next to each other or touching can weaken the magnets.
Curt probably has lots of extras. Ask him to check the magnet strength this way for you before he ships.
Athanasios |
Ooops.  You got me on that one. I have all the mags; CPC's too, all in one box. What you're saying is certainly logical though.
That might also explain why the old green and blue tubes still in the set aren't as sharp as the new red that I just put in with new coils and mags. All three tubes were a bear to rein in and I never did get the blue to play nice nice.
Looks like I'm making a trip to the basement to seperate them all before bed.  Good info Nash!
_________________
Greg
"Is it ignorance or apathy? Hey, I don't know and I don't care!" --Jimmy Buffett
|
|
| Back to top |
|
|
Bitwize
Joined: 09 May 2008
Posts: 83
|
| Posted: Tue Jun 08, 2010 11:56 am Post subject: |
|
|
| Nashou66 wrote: | | Bitwize wrote: | | Nashou66 wrote: | | Bitwize wrote: | | Nashou66 wrote: | Hmmm, Now its one of two things, the Tube or the Focus coil itself. With the focus connector removed from the FGM the center of the tube should still focus well. The sides top and bottom might be off a bit but fairly close. IF everything goes fuzzy quite a bit then your Magnets in the focus coil are not strong enough and the windings can't compensate.
Athanasios |
So disconnect the Green connector to the Focus Control Module? |
Yes, it still should focus well. when looking on the tube face. The windings are just to make up any slack the actual magnets might lack due to drifting over time.
Athanasios |
OK, interesting observation here...
Disconnected the Red and Green connectors from the Focus Control Module. The Red is still focused quite nicely! Green on the otherhand went VERY blurry...the crosshatch pattern lines are now 5 times thicker, uniformly across the screen.
So does this mean the magnets on the focus coil are hosed? |
It does sound like a bad magnet structure. This can happen in any number of ways. the most common and I bet many people do this is store then next to each other. I keep mine about 4-6 inches apart from each other when in storage.
Keeping them right next to each other or touching can weaken the magnets.
Curt probably has lots of extras. Ask him to check the magnet strength this way for you before he ships.
Athanasios |
Curt's current plan is to send me a new tube with all the housing, with "new" magnets prealigned. Though it is looking like bad magnet structure as opposed to a bad tube.
Thx again for helping me troubleshoot this focus problem!
|
|
| Back to top |
|
|
Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
|
|
| Back to top |
|
|
Bitwize
Joined: 09 May 2008
Posts: 83
|
| Posted: Tue Jun 08, 2010 2:22 pm Post subject: |
|
|
| Nashou66 wrote: | Yeah I think its just the Coil , but its cool your getting it taken care of. Id like to see if it is in fact the coil once curt gets the old tube assembly back from you.
Athanasios |
After further discussion with Curt, he believes the tube is the culprit. Shame as it's a new LUG. I think he'll be sending me a new LCP, which will match my Red and Blue. Probably not a bad idea to to use all LCP versus mixing a LUG in there.
|
|
| Back to top |
|
|
|
|
