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.
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.
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 !
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'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.
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.