Sean Meighan

Software => Xlights Test => Topic started by: ranjanpa on November 05, 2018, 04:48:23 PM

Title: Bad pixel?
Post by: ranjanpa on November 05, 2018, 04:48:23 PM

One pixel is on all the time in red color. Is this a case of bad pixel. Thanks




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Title: Re: Bad pixel?
Post by: bwinter on November 05, 2018, 05:07:25 PM

Is it the last pixel in the string?  One possibility would be to slightly drop the voltage (11.9V), assuming you're using 12V strips.

Title: Re: Bad pixel?
Post by: ranjanpa on November 05, 2018, 06:07:46 PM

Quote from: bwinter on November 05, 2018, 05:07:25 PM

Is it the last pixel in the string?  One possibility would be to slightly drop the voltage (11.9V), assuming you're using 12V strips.

I am injecting power at the end of the string  so this is the second pixel from the end. The first one from the end where the power is being injected does not light up. Thanks


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Title: Re: Bad pixel?
Post by: bwinter on November 05, 2018, 06:13:39 PM

Did you slightly drop the voltage?

Title: Re: Bad pixel?
Post by: ranjanpa on November 05, 2018, 06:22:59 PM

Quote from: bwinter on November 05, 2018, 06:13:39 PM

Did you slightly drop the voltage?

Not sure how to do that. I don’t have resistors. Thanks


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Title: Re: Bad pixel?
Post by: allknowing2012 on November 05, 2018, 06:53:55 PM

Test all green, all red, all blue. Perhaps the pixel does indeed have a bad RGB piece. I know I did and that proved it to me. Cut and splice a new pixel in there and all is good...

Title: Re: Bad pixel?
Post by: bwinter on November 05, 2018, 06:59:30 PM

Quote from: ranjanpa on November 05, 2018, 06:22:59 PM

Quote from: bwinter on November 05, 2018, 06:13:39 PM

Did you slightly drop the voltage?

Not sure how to do that. I don’t have resistors. Thanks


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Many power supplies have a voltage-adjustment screw.

Title: Re: Bad pixel?
Post by: ranjanpa on November 05, 2018, 08:22:57 PM

Quote from: bwinter on November 05, 2018, 06:59:30 PM

Quote from: ranjanpa on November 05, 2018, 06:22:59 PM

Quote from: bwinter on November 05, 2018, 06:13:39 PM

Did you slightly drop the voltage?

Not sure how to do that. I don’t have resistors. Thanks


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Many power supplies have a voltage-adjustment screw.

Thanks you . will test the pixels. My power supply does not have an adjustment screw.


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Title: Re: Bad pixel?
Post by: allknowing2012 on November 06, 2018, 08:17:31 AM

also can turn the brightness way down to reduce the power required -- to see if it is power related.

Title: Re: Bad pixel?
Post by: ranjanpa on November 07, 2018, 11:57:39 AM

Quote from: allknowing2012 on November 06, 2018, 08:17:31 AM

also can turn the brightness way down to reduce the power required -- to see if it is power related.

Thanks for the help. I swapped out the pixel and it works fine now.


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