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overclkr
Joined: 08 Mar 2006
Posts: 4227
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| Posted: Thu Nov 08, 2012 1:19 am Post subject: My G90 saga continues. |
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Guys,
Shortly after the meet I started having problems again on the blue channel with the problem child. I got some pics this time hopefully some one can chime in on what might be causing this.
Before the meet, I simply lost around 10-15% of my needed gain on the blue tube with no ability to correct it via firmware gain control. After the change out of the YA board, wala, all was well again, but now I am getting this:
As you can see, there is crazy retrace going on there and the picture is so dim and out of focus, it doesn't even have enough to hit the screen. After I turn ABG on and off (some times takes a few times doing it), everything comes back, but not all the time. I also have to powercycle the projector to correct it as well.
Result after fooling with ABG:
As you can see the tube is blasting again and focus is perfect.
Any ideas? I am out of ideas at this point so ANY suggestions would be appreciated 
Cliffy
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Nov 08, 2012 2:01 am Post subject: |
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Have you tried swapping YA boards between the projectors?
Could possibly be on the PE board.
I'll look over some other stuff tomorrow.
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overclkr
Joined: 08 Mar 2006
Posts: 4227
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| Posted: Thu Nov 08, 2012 2:58 am Post subject: |
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| macgyver655 wrote: | Have you tried swapping YA boards between the projectors?
Could possibly be on the PE board.
I'll look over some other stuff tomorrow. |
No I sure haven't but am certainly willing to give it a try. Might even resolve the problem for me
Thanks Mac. Mucho appreciated.
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HaydnG90
Joined: 22 May 2006
Posts: 1356
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| Posted: Thu Nov 08, 2012 4:02 pm Post subject: |
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Have you tried switching neck boards to make sure its not tube related?
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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: Thu Nov 08, 2012 4:06 pm Post subject: |
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THis can't be the tube or the neck board. We did change those when I was there. (unless something is intermittent, but I doubt it).
I'd explore areas that we haven't changed. We swapped out the YA board (he's got mine now), RGB board, neck board and tube. Since this appears to be a gain issue, or more specifically, something to do with the G2 areas, or something outside of the YA board that controls video/tube gain.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Nov 08, 2012 4:08 pm Post subject: |
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| HaydnG90 wrote: | | Have you tried switching neck boards to make sure its not tube related? |
I believe they tried a new tube the last time and it made no difference. At least that's what I thought.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Nov 08, 2012 4:10 pm Post subject: |
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| Curt Palme wrote: | THis can't be the tube or the neck board. We did change those when I was there. (unless something is intermittent, but I doubt it).
I'd explore areas that we haven't changed. We swapped out the YA board (he's got mine now), RGB board, neck board and tube. Since this appears to be a gain issue, or more specifically, something to do with the G2 areas, or something outside of the YA board that controls video/tube gain. |
g2 controls are on the PE board which is why I suggested it. I was going to look at my G90 to see if the G2 lines could be swapped between the blue and green. I'm not fully convinced is a G2 issue to begin with.
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overclkr
Joined: 08 Mar 2006
Posts: 4227
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| Posted: Thu Nov 08, 2012 7:27 pm Post subject: |
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| Curt Palme wrote: | THis can't be the tube or the neck board. We did change those when I was there. (unless something is intermittent, but I doubt it).
I'd explore areas that we haven't changed. We swapped out the YA board (he's got mine now), RGB board, neck board and tube. Since this appears to be a gain issue, or more specifically, something to do with the G2 areas, or something outside of the YA board that controls video/tube gain. |
Thanks for Chiming in Curt. Mucho appreciated.
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overclkr
Joined: 08 Mar 2006
Posts: 4227
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| Posted: Thu Nov 08, 2012 7:28 pm Post subject: |
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| macgyver655 wrote: | | Curt Palme wrote: | THis can't be the tube or the neck board. We did change those when I was there. (unless something is intermittent, but I doubt it).
I'd explore areas that we haven't changed. We swapped out the YA board (he's got mine now), RGB board, neck board and tube. Since this appears to be a gain issue, or more specifically, something to do with the G2 areas, or something outside of the YA board that controls video/tube gain. |
g2 controls are on the PE board which is why I suggested it. I was going to look at my G90 to see if the G2 lines could be swapped between the blue and green. I'm not fully convinced is a G2 issue to begin with. |
Yep, we changed neckboard, RGB input board, as well as YA. It works with the new YA, but I have to play with it (cycle power, turn off/on ABG). What are you leaning towards big dog?
I should have time this weekend to take the front of the hushbox off and start swapping boards from the front if needed.
Cliff
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Nov 08, 2012 9:10 pm Post subject: |
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If it was me Cliff I would first try swapping the G2 lines between the green and the blue. They are in a connector at the PE board and that can be difficult sometimes to get them to release. So you would have to swap them on the neckboards. They are real easy to get at once you drop the video amp boards. Also, to make them long enough to swap you have to open the little gates on the plastic holders that the wires pass through. But they are long enough, I checked. Hopefully the problem then goes to the green. If not we have to do some more hunting.
What's odd here is the retrace lines and the dim picture for it to be G2. Usually it's bright screen with retrace or just dim and no retrace. But we'll see.
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Spanky Ham
Joined: 22 Mar 2006
Posts: 5643
Location: Comedy Central
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| Posted: Thu Nov 08, 2012 9:32 pm Post subject: |
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I hear there is a G90 expert in the Chicago area.  Of course after Curt and I both got pulled over, the trip over there might not be fun. 
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overclkr
Joined: 08 Mar 2006
Posts: 4227
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| Posted: Thu Nov 08, 2012 9:42 pm Post subject: |
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| macgyver655 wrote: | If it was me Cliff I would first try swapping the G2 lines between the green and the blue. They are in a connector at the PE board and that can be difficult sometimes to get them to release. So you would have to swap them on the neckboards. They are real easy to get at once you drop the video amp boards. Also, to make them long enough to swap you have to open the little gates on the plastic holders that the wires pass through. But they are long enough, I checked. Hopefully the problem then goes to the green. If not we have to do some more hunting.
What's odd here is the retrace lines and the dim picture for it to be G2. Usually it's bright screen with retrace or just dim and no retrace. But we'll see. |
Is the PE board in the front or the back? Forgive my ignorance, my brain has been hammered like no tomorrow this year 
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Nov 08, 2012 10:00 pm Post subject: |
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The PE board is under the metal cover with @ 11 screws that the rear IR is attached to. There are a couple boards under there. It is the one with PE in big letters on the middle of the board. You could try just swapping this board between the 2 projectors and see if the problem follows but if it doesn't then you would still have to swap the G2 lines on the neckboards. Is the problem real consistent or occasional?
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overclkr
Joined: 08 Mar 2006
Posts: 4227
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| Posted: Thu Nov 08, 2012 10:23 pm Post subject: |
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| macgyver655 wrote: | | The PE board is under the metal cover with @ 11 screws that the rear IR is attached to. There are a couple boards under there. It is the one with PE in big letters on the middle of the board. You could try just swapping this board between the 2 projectors and see if the problem follows but if it doesn't then you would still have to swap the G2 lines on the neckboards. Is the problem real consistent or occasional? |
It's consistent every time during warm up. Usually goes away after but, blue will still drop off from time to time. I think I know what board your talking about now. I brought that damn thing over to Craig's now that I think about it. I'm going to take it out and clean the connectors REAL good especially on the daughter boards. If that doesn't do it, I'll switch them and see what happens.
I'll bet my original YA board is probably good then. Which is good news. If it still has a problem after this, I'm sure it can be repaired (it has the good IC). Thanks BIG DOG!
I'll report back after the surgery lol.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Nov 08, 2012 10:54 pm Post subject: |
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| overclkr wrote: | | macgyver655 wrote: | | The PE board is under the metal cover with @ 11 screws that the rear IR is attached to. There are a couple boards under there. It is the one with PE in big letters on the middle of the board. You could try just swapping this board between the 2 projectors and see if the problem follows but if it doesn't then you would still have to swap the G2 lines on the neckboards. Is the problem real consistent or occasional? |
It's consistent every time during warm up. Usually goes away after but, blue will still drop off from time to time. I think I know what board your talking about now. I brought that damn thing over to Craig's now that I think about it. I'm going to take it out and clean the connectors REAL good especially on the daughter boards. If that doesn't do it, I'll switch them and see what happens.
I'll bet my original YA board is probably good then. Which is good news. If it still has a problem after this, I'm sure it can be repaired (it has the good IC). Thanks BIG DOG!
I'll report back after the surgery lol. |
The PE does not have any standup boards on it. Your probably thinking the EB boards that are also under that cover. But it wouldn't hurt to clean all the connections on the PE. You never know.
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overclkr
Joined: 08 Mar 2006
Posts: 4227
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| Posted: Mon Nov 12, 2012 3:45 am Post subject: |
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| macgyver655 wrote: | | The PE does not have any standup boards on it. Your probably thinking the EB boards that are also under that cover. But it wouldn't hurt to clean all the connections on the PE. You never know. |
So I was going to go ahead and take down the hushbox this weekend, but the problem child never gave me a single issue. Not one.
Watched The Amazing Spider Man in 3D, as well as two other movies and watching the Bears right now. Not a single issue. Leaving it alone until next weekend.
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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: Mon Nov 12, 2012 3:50 am Post subject: |
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Oh let's face it Cliff, a stacked pair of G90s is your bitch!
Hahahahahahahah!
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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: Mon Nov 12, 2012 3:51 am Post subject: |
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More seriously, considering the intermittent nature of your issue, I'd say it's a connector/module connector issue rather than a failing/failed part..
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overclkr
Joined: 08 Mar 2006
Posts: 4227
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| Posted: Mon Nov 12, 2012 1:34 pm Post subject: |
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| Curt Palme wrote: | | More seriously, considering the intermittent nature of your issue, I'd say it's a connector/module connector issue rather than a failing/failed part.. |
You would think right? Oh, and yes, they are MY BITCHES 
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