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Thermal Protection???



Hello
I have a BrightSign unit mounted horizontally in the top section of an enclosed display kiosk. After about 3 hours the unit shuts itself off. There are vents at the top of the kiosk, and while previously using a VCR in the same location, heat buildup in the cabinet was never an issue. I am wondering if heat could be the culprit here. How much heat is generated by BrightSign's processor during decoding? Given the fact that the unit only draws 5 watts and never feels unusually hot to the touch, I am a bit puzzled. This unit loops continuously for 8 hours per day. Thanks for any input.

6 comments

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    RokuLyndon


    Liamc,



    When you say shutoff, do you mean that the loop stops playing?

    Or, is there actually no power to the unit, no lights on the front of the unit?



    How long is the loop you are running?

    What is being looped?

    What flash card are you using? Have you tried different flash cardfs?





    Is it possible for you to test this unit connected to a computer using a serial cable so we can see any output that's procduced when the unit stops playing?



    You are correct that the unit produces little heat. We need to indentify if it's a content related issue, your flash card, or the unit.



    I sent you an email as well.

    Lyndon
  • 0
    Avatar
    liamc


    Yes, the loop stops playing and the screen goes blank.  The power light remains on, but the unit no longer plays.  A power cycle is required to restore operation.  Here are the details of the setup:



    30 minute loop



    Sandisk Ultra II 2Gb card



    Looping an MPEG2 file (VOB's would play once and not loop, despite many iterations of the autorun.bas file)



    I did have this issue a few weeks back with another unit.  I am running three throughout our venue.  I have mounted the other two in the vertical to allow convection to cool the player and have not had any trouble since, but do not have that option with this unit in question.
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    mkeymont


    I have seen heat/humidity related issues as well, I believe. At least they occur far more frequently in high heat situations. We have a script that runs great most of the time, however, when we bring it to Oshkosh, WI and run it for a week straight inside an enclosure with some but not much ventilation, it crashes several times a day. I'm actually glad to hear that someone else has had similar issues because now I know that I"m not crazy!

    - M
  • 0
    Avatar
    RokuLyndon


    Hi,



    Do you have a way to test the ambient air temperature inside the kiosk? It should not be above 40 c. Try mounting the unit vertically with vents on the top and bottom.



    Also, you should check the temperature rating on your compact flash card.
  • 0
    Avatar
    Ggarner


    Also as a test, could you temporarily leave the door open or put a fan inside the kiosk to see if it makes a difference in the run time?



    What version of software are you running on the units?



    Greg Garner

    Director of Hardware Engineering
  • 0
    Avatar
    mkeymont


    My next opportunity to do a heat test is the end of September in California. I will do my best to gather as much information regarding heat and stability at that time.

    - Mike
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