Is there a good way to wire fans to turn on with tv?

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  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK
    #21
    Re: Is there a good way to wire fans to turn on with tv?

    You can run a 12V fan on 15V. It will run faster. Most of them are rated something like 7~16VDC. You can also use a resistor in series to drop the operating voltage which will be far simpler than a linear regulator.
    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

      Comment

      • davep911
        Member
        • Jul 2014
        • 35
        • US
        #22
        Re: Is there a good way to wire fans to turn on with tv?

        After 2 weeks running 2 thermister fans at about 50% I have decided they are too loud. Fans unmounted are really quiet but when screwed to the large, thin back cover they create noise. With the fans the temp is about 110 deg F. Without them it is about 150 deg and with the back cover and fans off it is about 130 deg.

        I don't have kids or any random people around this tv so is there any reason why I couldn't just keep the back cover off?

        Is 150 deg F ok and I am worrying about nothing?

          Comment

          • tom66
            EVs Rule
            • Apr 2011
            • 32560
            • UK
            #23
            Re: Is there a good way to wire fans to turn on with tv?

            Oddly, running with the cover off can be worse. With no ducting for the air, the TV may run hotter than before. I've noticed this on certain Panasonic plasmas.
            Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
            For service manual, schematic, boardview (board view), datasheet, cad - use our search.

              Comment

              • multimeter
                Badcaps Veteran
                • Jan 2011
                • 739
                • united kingdom
                #24
                Re: Is there a good way to wire fans to turn on with tv?

                Originally posted by tom66
                Oddly, running with the cover off can be worse. With no ducting for the air, the TV may run hotter than before. I've noticed this on certain Panasonic plasmas.
                yeah agreed, seen this issue also,when the tv back is removed, its exposed to ambient temps which are higher than a duct vented fan which obviously has forced cooling, = lower temps.
                fixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!

                ----------------------------------------------
                please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!

                  Comment

                  • tibimakai
                    Badcaps Legend
                    • Jan 2012
                    • 3680
                    • USA
                    #25
                    Re: Is there a good way to wire fans to turn on with tv?

                    You should use, those push in rubber feet for the fan.

                      Comment

                      • davep911
                        Member
                        • Jul 2014
                        • 35
                        • US
                        #26
                        Re: Is there a good way to wire fans to turn on with tv?

                        Originally posted by tom66
                        Oddly, running with the cover off can be worse. With no ducting for the air, the TV may run hotter than before. I've noticed this on certain Panasonic plasmas.
                        Originally posted by multimeter
                        yeah agreed, seen this issue also,when the tv back is removed, its exposed to ambient temps which are higher than a duct vented fan which obviously has forced cooling, = lower temps.
                        Right, the tv almost seems to move as much air with the fans off as with them on. I think the reason it's cooler with the cover off is because the tv is near an A/C vent that is on most of the time.

                        Originally posted by tibimakai
                        You should use, those push in rubber feet for the fan.
                        Tried with and without rubber feet and the screws loose and tight but there is not much difference. I think 1 of the fans is a little unbalanced and it is being amplified at a large unsupported area of the back cover.

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