TruVue Vango - Owner's Thread - Page 33 - AVS Forum | Home Theater Discussions And Reviews
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post #961 of 974 Old 11-19-2017, 12:22 PM
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Hey all. My cable box froze up semi-recently, and in the haste to get it all operational I just flipped the power switch to recycle everything only to find this broke my HDMI/HDCP connection that had been rock solid for the last year or two and now I can't get it back.

So my Vango is back to going through what appears to be a power cycle every time content gets displayed. I was able to get it to be solid for about an hour one night after a pretty extensive HDMI reset procedure but then it picked back up again.

On the other hand, I can send the Vango the menu from my receiver all day long without a hiccup.

I've seen hardware solutions like Dr. HDMI and wonder if this will solve my issues. Is there something cheaper I can put between my receiver and the projector that might help?

Or did anyone have similar issues? Mine started about a year after I got the projector when I redid all my cabling, and I usually eventually get it solid until I do something stupid like I did last month.

XBox: King Nuthin
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post #962 of 974 Old 11-23-2017, 08:43 PM
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Originally Posted by CoreyM View Post
Hey all. My cable box froze up semi-recently, and in the haste to get it all operational I just flipped the power switch to recycle everything only to find this broke my HDMI/HDCP connection that had been rock solid for the last year or two and now I can't get it back.

So my Vango is back to going through what appears to be a power cycle every time content gets displayed. I was able to get it to be solid for about an hour one night after a pretty extensive HDMI reset procedure but then it picked back up again.

On the other hand, I can send the Vango the menu from my receiver all day long without a hiccup.

I've seen hardware solutions like Dr. HDMI and wonder if this will solve my issues. Is there something cheaper I can put between my receiver and the projector that might help?

Or did anyone have similar issues? Mine started about a year after I got the projector when I redid all my cabling, and I usually eventually get it solid until I do something stupid like I did last month.

Try new HDMI cable?

Last edited by manoharshetty9; 11-23-2017 at 08:51 PM.
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post #963 of 974 Old 11-24-2017, 02:45 AM
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Originally Posted by manoharshetty9 View Post
Try new HDMI cable?
I've tried more than a few. I ordered the Dr. HDMI it was supposed to arrive earlier this week but should arrive tomorrow and we'll see how it goes.

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post #964 of 974 Old 11-25-2017, 02:25 PM
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Just following up - the Dr. HDMI arrived yesterday. I plugged it in, and despite one or two hiccups when first getting it set up (a channel change killed the cable input until I tinkered with it a bit, and selecting the proper EDID mode seemingly shut the projector down), I've had a rock solid connection across cable, Blu-ray and Firestick for the past ~24 hours without a single glitch.

There are way too many variables to determine precisely what caused the issues I was having but if this is the fix I can live with it because I had no intention of upgrading the theater any time soon.

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post #965 of 974 Old 11-27-2017, 03:03 AM
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Originally Posted by CoreyM View Post
Just following up - the Dr. HDMI arrived yesterday. I plugged it in, and despite one or two hiccups when first getting it set up (a channel change killed the cable input until I tinkered with it a bit, and selecting the proper EDID mode seemingly shut the projector down), I've had a rock solid connection across cable, Blu-ray and Firestick for the past ~24 hours without a single glitch.

There are way too many variables to determine precisely what caused the issues I was having but if this is the fix I can live with it because I had no intention of upgrading the theater any time soon.
congratulations on solving the issue. Have fun.
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post #966 of 974 Old 04-02-2019, 05:01 PM
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To all Vango &/or Wolf DCL-200FD owners,

I acquired a faulty Wolf DCL-200FD LED Projector that I've now done some successful electronic repairs on.

There's an issue with the red & blue convergence - both out about a pixel or so (in opposite X & Y directions). I had to dissemble the light engine as part of the repair, & this may be a result of same.

I've read in this Vango Forum that the Wolf DCL-200FD & Vango are effectively the same unit.

Is anyone aware of any Convergence adjustments on the Main Board to correct this please?

If not, is it possible to correct this issues using mechanical adjustments on the Light Engine please?

If anyone is able to assist with a Service Manual for the Vango &/or Wolf DCL-200FD, this would be appreciated.

Thanks in anticipation for your reading & (hopefully) assistance,

Peter.
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post #967 of 974 Old 04-04-2019, 09:30 PM
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Originally Posted by petepa View Post
To all Vango &/or Wolf DCL-200FD owners,

I acquired a faulty Wolf DCL-200FD LED Projector that I've now done some successful electronic repairs on.

There's an issue with the red & blue convergence - both out about a pixel or so (in opposite X & Y directions). I had to dissemble the light engine as part of the repair, & this may be a result of same.

I've read in this Vango Forum that the Wolf DCL-200FD & Vango are effectively the same unit.

Is anyone aware of any Convergence adjustments on the Main Board to correct this please?

If not, is it possible to correct this issues using mechanical adjustments on the Light Engine please?

If anyone is able to assist with a Service Manual for the Vango &/or Wolf DCL-200FD, this would be appreciated.

Thanks in anticipation for your reading & (hopefully) assistance,

Peter.
Hi Peter,


The Vango has a single DMD chip so there can't be convergence issues with the imaging DMD Device(Mainboard).


Could you post some pictures of the problem you are describing?
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post #968 of 974 Old 04-04-2019, 11:30 PM
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Hi manoharshetty9


Many thanks for your prompt response, as this thread has been dormant for a while!


I realise the Wolf & Vango are single chip DMD projectors, with separate RGB LED light sources feeding the chip, hence in theory there should be no convergence issues, certainly not with the DMD Mainboard.



Maybe what I'm seeing is due to optical alignment/lens issues.


I'll attach some images I've just taken of a Convergence Test Pattern (produced from the associated Wolf DCL-200FD Pro Scaler - "Fine Crosshatch" Terst Patter, HDMI 1 Input). They aren't as clear as I'd like hence my measurements below to assist:



My observations are as follows, maximum zoom, with accurate focus at centre of image. (NB: Blue is accurate & in centre of Test Pattern, & is reference for pixel displacements below):


Centre: RED: -1 pixel Vertical, OK Horizontal; GREEN: +1/2 pixel Vertical, OK Horizontal


Left Centre: RED: - 1 pixel Vertical, +1 pixel Horizontal; GREEN: Vertical OK, - 1 pixel Horizontal


Right Centre: RED: -1 pixel Vertical, -1 pixel Horizontal; GREEN: + 1 pixel Vertical, + 1/2 pixel Horizontal


At the corners of the image, the above errors are progressively greater, up to 2 pixels out of convergence, in the same directions.


Hopefully the above observations & associates pictures are a clue to the image problems.


Many thanks for your assistance.


Peter.
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Last edited by petepa; 04-04-2019 at 11:31 PM. Reason: Correction
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post #969 of 974 Old 04-05-2019, 04:46 AM
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Quote:
Originally Posted by petepa View Post
Hi manoharshetty9


Many thanks for your prompt response, as this thread has been dormant for a while!


I realise the Wolf & Vango are single chip DMD projectors, with separate RGB LED light sources feeding the chip, hence in theory there should be no convergence issues, certainly not with the DMD Mainboard.



Maybe what I'm seeing is due to optical alignment/lens issues.


I'll attach some images I've just taken of a Convergence Test Pattern (produced from the associated Wolf DCL-200FD Pro Scaler - "Fine Crosshatch" Terst Patter, HDMI 1 Input). They aren't as clear as I'd like hence my measurements below to assist:



My observations are as follows, maximum zoom, with accurate focus at centre of image. (NB: Blue is accurate & in centre of Test Pattern, & is reference for pixel displacements below):


Centre: RED: -1 pixel Vertical, OK Horizontal; GREEN: +1/2 pixel Vertical, OK Horizontal


Left Centre: RED: - 1 pixel Vertical, +1 pixel Horizontal; GREEN: Vertical OK, - 1 pixel Horizontal


Right Centre: RED: -1 pixel Vertical, -1 pixel Horizontal; GREEN: + 1 pixel Vertical, + 1/2 pixel Horizontal


At the corners of the image, the above errors are progressively greater, up to 2 pixels out of convergence, in the same directions.


Hopefully the above observations & associates pictures are a clue to the image problems.


Many thanks for your assistance.


Peter.

I believe what you're seeing there is some chromatic aberration.

It's a failure of a lens to focus all colors to the same point. It is caused by the refractive index of the lens elements varying with the wavelength of light and manifests itself as fringes of color along boundaries.

It's inherent to some degree in all lens assemblies with more expensive units having more correction.
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post #970 of 974 Old 04-05-2019, 08:31 AM
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Originally Posted by petepa View Post
Hi manoharshetty9


Many thanks for your prompt response, as this thread has been dormant for a while!


I realise the Wolf & Vango are single chip DMD projectors, with separate RGB LED light sources feeding the chip, hence in theory there should be no convergence issues, certainly not with the DMD Mainboard.



Maybe what I'm seeing is due to optical alignment/lens issues.


I'll attach some images I've just taken of a Convergence Test Pattern (produced from the associated Wolf DCL-200FD Pro Scaler - "Fine Crosshatch" Terst Patter, HDMI 1 Input). They aren't as clear as I'd like hence my measurements below to assist:



My observations are as follows, maximum zoom, with accurate focus at centre of image. (NB: Blue is accurate & in centre of Test Pattern, & is reference for pixel displacements below):


Centre: RED: -1 pixel Vertical, OK Horizontal; GREEN: +1/2 pixel Vertical, OK Horizontal


Left Centre: RED: - 1 pixel Vertical, +1 pixel Horizontal; GREEN: Vertical OK, - 1 pixel Horizontal


Right Centre: RED: -1 pixel Vertical, -1 pixel Horizontal; GREEN: + 1 pixel Vertical, + 1/2 pixel Horizontal


At the corners of the image, the above errors are progressively greater, up to 2 pixels out of convergence, in the same directions.


Hopefully the above observations & associates pictures are a clue to the image problems.


Many thanks for your assistance.


Peter.
I think there maybe a solution to the problem if I could get a bit more information. Not a hundred % sure but you could give it a shot.


a. Did you have this problem before you disassembled the light engine? I mean was the image crisp/properly converged before and this is only after your repair attempt.


b. Which lens do you have(short throw or long throw) T1/T2. While disassembling the light engine did you also remove the lens from the lens holding mechanism (which I think is made of metal plate) which holds the projection lens in place.
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post #971 of 974 Old 04-05-2019, 07:02 PM
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Originally Posted by manoharshetty9 View Post
I think there maybe a solution to the problem if I could get a bit more information. Not a hundred % sure but you could give it a shot.


a. Did you have this problem before you disassembled the light engine? I mean was the image crisp/properly converged before and this is only after your repair attempt.


b. Which lens do you have(short throw or long throw) T1/T2. While disassembling the light engine did you also remove the lens from the lens holding mechanism (which I think is made of metal plate) which holds the projection lens in place.

Thanks manoharshetty9 & b curry for your responses.


The lens is the long throw 2.2 to 4.4:1 lens.


I did the electronics repair, then after testing, wasn't happy with the convergence, which was the same as the above observations & pictures.



I could see a reasonable amount of dust, etc looking into the lens, so removed the lens (from the lens mounting plate) to clean the inner end, & also removed the top of the light engine & carefully cleaned optical elements, being extremely careful not to disturb any optical elements.


I was disappointed to see on re-assembly & convergence test that there was no improvement, ie it was the same as previously.



Important information for you guys is that there was definitely no degradation in the convergence.


After reading your posts, I agree that the issue does appear to be an optical anomaly such as chromatic aberrations from the lens.


After examining the convergence test pattern again, I think there's supportive evidence of chromatic aberrations as follows:


RED: Vertical is - 1 pixel all over the image; Horizontal is -1 pixel in at both sides (this is not a convergence issue).


GREEN: Vertical is +1 pixel over all the image; Horizontal is +1 pixel in at both sides (this is not a convergence issue).


I'm aware of the 3 x Schiemflug screws (spring loaded: 2 at top & one at bottom left of the lens), but purposely haven't touched these (as yet), as realise they can be a can of worms, unless due care taken.


I'd be most appreciative of any further comments & advice you guys may have.


Thanks manoharshetty9 for your PM requesting my email address, so you can send a copy of the Vango Service Manual. I've also responded to you by PM, which I hope you've received, as I haven't as yet had an email from you.


Thanks again for your assistance.


Best regards,


Peter.
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post #972 of 974 Old 04-05-2019, 08:47 PM
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Originally Posted by petepa View Post
Thanks manoharshetty9 & b curry for your responses.


The lens is the long throw 2.2 to 4.4:1 lens.


I did the electronics repair, then after testing, wasn't happy with the convergence, which was the same as the above observations & pictures.



I could see a reasonable amount of dust, etc looking into the lens, so removed the lens (from the lens mounting plate) to clean the inner end, & also removed the top of the light engine & carefully cleaned optical elements, being extremely careful not to disturb any optical elements.


I was disappointed to see on re-assembly & convergence test that there was no improvement, ie it was the same as previously.



Important information for you guys is that there was definitely no degradation in the convergence.


After reading your posts, I agree that the issue does appear to be an optical anomaly such as chromatic aberrations from the lens.


After examining the convergence test pattern again, I think there's supportive evidence of chromatic aberrations as follows:


RED: Vertical is - 1 pixel all over the image; Horizontal is -1 pixel in at both sides (this is not a convergence issue).


GREEN: Vertical is +1 pixel over all the image; Horizontal is +1 pixel in at both sides (this is not a convergence issue).


I'm aware of the 3 x Schiemflug screws (spring loaded: 2 at top & one at bottom left of the lens), but purposely haven't touched these (as yet), as realise they can be a can of worms, unless due care taken.


I'd be most appreciative of any further comments & advice you guys may have.


Thanks manoharshetty9 for your PM requesting my email address, so you can send a copy of the Vango Service Manual. I've also responded to you by PM, which I hope you've received, as I haven't as yet had an email from you.


Thanks again for your assistance.


Best regards,


Peter.
Actually I was going to suggest making adjustments to the 3 x Schiemflug screws.


Sorry but I just checked and don't seem to have received your PM.


Please check your PM. Message sent.
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post #973 of 974 Old 04-06-2019, 03:13 PM
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Actually I was going to suggest making adjustments to the 3 x Schiemflug screws.


Sorry but I just checked and don't seem to have received your PM.


Please check your PM. Message sent.



I emailed you yesterday, using the email info you sent in your PMs', & replaced ".......-at-hotmail.com" with "...... "@ hotmail . com - no spaces, all lower case - problems sending this PM with "links"!!) which was sent OK.


Since I haven't heard from you I've now re-sent the email.


Perhaps it's been put into your Hotmail Junk Mail folder...


I've received all x 4 PMs' your sent, but can't reply to same, hence by email.


Thanks for your assistance & persistence!


Best regards,


Peter.

Last edited by petepa; 04-06-2019 at 03:33 PM. Reason: Correction to text
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post #974 of 974 Old 04-06-2019, 09:24 PM
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Originally Posted by petepa View Post
I emailed you yesterday, using the email info you sent in your PMs', & replaced ".......-at-hotmail.com" with "...... "@ hotmail . com - no spaces, all lower case - problems sending this PM with "links"!!) which was sent OK.


Since I haven't heard from you I've now re-sent the email.


Perhaps it's been put into your Hotmail Junk Mail folder...


I've received all x 4 PMs' your sent, but can't reply to same, hence by email.


Thanks for your assistance & persistence!


Best regards,


Peter.
email sent.
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