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    Simple remote led stay on

    Hey,

    I'm trying to fix a ceiling fan remote control, it is very simple with very few components.

    It has a few resistors, 16v 47uf cap, 455E, BA5104 and a transistor (3 legs).

    When I press any button the led stay on... I remove and insert the batteries and the led is on again - some times it will let me send a command or two and then the led will stay on.

    Which component is the prime suspect ?

    Thanks !
    Elior

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    Re: Simple remote led stay on

    As a guess, it is most likely that one of your buttons is malfunctioning.
    Check to see if the remote is also transmitting IR. You can do this by using a digital camera. If it IS on, then faulty button is most likely.

    Also ensure that your battery has correct output voltage. Sometimes a very low voltage can cause IC to malfunction without actually being 'bad'

    Of course it is also possible that the BA5104 has gone bad.



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    Re: Simple remote led stay on

    The cell phone camera can show IR transmit ? how do I do that ?
    I checked with fresh batteries.
    I ordered all the components and the BA5104 too.



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    Re: Simple remote led stay on

    Quote Originally Posted by elior77 View Post
    The cell phone camera can show IR transmit ? how do I do that ?...
    You look at the IR led through your camera viewfinder/ screen. If it is On or pulsing then you will see it as a purplish glow. Try it out on some other working remote !

    I checked with fresh batteries.
    good

    I ordered all the components and the BA5104 too.
    But my first guess is a bad button !!



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    Re: Simple remote led stay on

    Quote Originally Posted by kripacharya View Post
    You look at the IR led through your camera viewfinder/ screen. If it is On or pulsing then you will see it as a purplish glow. Try it out on some other working remote !



    good



    But my first guess is a bad button !!

    I've tried viewing ir led before with my iPhone 6. I could not view it with forward facing camera. I believe it has a filter. I could see it with backward facing camera.



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    Re: Simple remote led stay on

    Quote Originally Posted by Kajunbee View Post
    ... I could see it with backward facing camera.
    So what did you see ?



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    Re: Simple remote led stay on

    Quote Originally Posted by kripacharya View Post
    So what did you see ?
    A very quick blinking red light. It wasn't a glow as you say. I'm not sure why.

    - - - Updated - - -

    Quote Originally Posted by Kajunbee View Post
    A very quick blinking red light. It wasn't a glow as you say. I'm not sure why.
    Do some remotes use a led other than ir maybe.



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    Re: Simple remote led stay on

    The iphone does not show IR, another not iphone smartphone I have does show IR - the led (on the remote not the IR) is stuck on and the IR does not transmit.
    When the remote does work for a few presses the smartphone does show the IR led light up.



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    Re: Simple remote led stay on

    I repeat once again. One, or some of your buttons are bad.
    2nd possibility is that ba5104 is bad, but that is unlikely.



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    Re: Simple remote led stay on

    The test show the when the led on the remote is stuck on, the IR does not transmit - doesn't this show that it is not a button problem ?



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