| Author |
Message |
stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
|
| Posted: Sun Jul 13, 2008 10:28 pm Post subject: Question for Scott |
|
|
One of my AmPro's has a slight darkening of the lower half of the screen. It's on all three colors and it's not wear. It has a distinct line half way up and is more noticable on the left side and fades away to almost not detectable on the right. It moves with master shift. I've never seen this before.Any thoughts? Thanks,
_________________
Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
|
|
| Back to top |
|
 |
papalek
Joined: 08 Mar 2006
Posts: 1536
Location: Longs SC
|
| Posted: Sun Jul 13, 2008 11:41 pm Post subject: |
|
|
I have seen similar when the image was off the edge of the tube.
_________________
My current list of PJ's AmPro 1 1/2-4600,4200, 1/2-3600,2600.
I do love my AmPro's
|
|
| Back to top |
|
|
macgyver655
Joined: 22 Aug 2007
Posts: 8508
|
| Posted: Sun Jul 13, 2008 11:44 pm Post subject: |
|
|
|
Curious Chip, but can you see it with the internal test patterns also?
|
|
| Back to top |
|
|
Gary M.
Guest
|
| Posted: Mon Jul 14, 2008 2:11 am Post subject: |
|
|
| papalek wrote: | | I have seen similar when the image was off the edge of the tube. |
I have as well and sometimes related to vertical position and/or phase
-Gary
|
|
| Back to top |
|
|
Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
|
| Posted: Mon Jul 14, 2008 3:14 am Post subject: |
|
|
|
Do a code 55. I'll bet it goes away. I've seen this before. Similar to the line of coincidence in a Barco.
|
|
| Back to top |
|
|
stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
|
| Posted: Mon Jul 14, 2008 9:37 am Post subject: |
|
|
You don't see it on internal test patterns as you can only see it on whight or bright areas on the screen ans AmPro's don't have full white test patterns.
If it goes away with a "55[code]" what's the problem? I can't live with registration off forever 
_________________
Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
|
|
| Back to top |
|
|
macgyver655
Joined: 22 Aug 2007
Posts: 8508
|
| Posted: Mon Jul 14, 2008 2:58 pm Post subject: |
|
|
| stefuel wrote: | You don't see it on internal test patterns as you can only see it on whight or bright areas on the screen ans AmPro's don't have full white test patterns.
If it goes away with a "55[code]" what's the problem? I can't live with registration off forever |
I thought about the Ampro not having an all white test pattern when I posted (Have a few Ampro's myself) but was wondering if you could see the darkeneing on the lower half you also mentioned.
Curt's suggestion is to determine if geometry is causing the line and is worth looking into. Just not sure about the darkening though, but you have to start somewhere. If it does go away on a code 55 I would then bring up a fine test pattern with green only (main) and look for any incosistencies the pattern. I've never been able to produce a line with the type of adjustments on an Ampro, but it should be checked.
You said you can see the line and the darkeneing on all 3 tubes. Is this looking in the lenses or on the screen. If on the screen how can you tell it's all 3?
|
|
| Back to top |
|
|
stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
|
| Posted: Wed Jul 16, 2008 10:42 am Post subject: |
|
|
It's on screen. I can turn off the other two colors while watching something and see it. It's not burn or wear as I can move the line with shift. I have no time to play with it till this weekend. I'm on call at work 24/7 till Friday AM while still working my regular shift. What ever is causing it, it's doing it on all saved memory locations. I have plenty of parts to swap in if needed. I was hoping to save time by asking here so I wouldn't have to resort to the "shot-gun" method.
_________________
Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
|
|
| Back to top |
|
|
Ray Cendroski
Joined: 22 Apr 2006
Posts: 68
Location: Concord, Ohio
|
|
| Back to top |
|
|
macgyver655
Joined: 22 Aug 2007
Posts: 8508
|
| Posted: Wed Jul 16, 2008 1:54 pm Post subject: |
|
|
Well see there, that explains why I could never get a line. I always felt those settings were not and should not be used and I always set them to 50. Never messed around with them to see what would happen.
|
|
| Back to top |
|
|
stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
|
| Posted: Wed Jul 16, 2008 11:25 pm Post subject: |
|
|
Well, I guess I'll have to check that out this weekend. That sounds like exactly what is happening. When my original green imploded, I stole a tube from my other 4600 and did a quickie setup. It's been there ever since. It's hardly noticeable. In fact I'm the only one that sees it 
_________________
Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
|
|
| Back to top |
|
|
|
|
