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Remote control interferences

Good morning all,


Last day we had an issue with a remote control that couldn't communicate with the STB.

 

After many attempts we found the issue. We realized that the power cable of the TV had a ferrite installed and that make us think. Is something like this:

 

 

A ferrite is a device (called EMI filter) that suppresses electromagnetic noise. I attach a link below that explains properly how this stuff works:

 

https://www.murata.com/products/emc/ferrite/basic/reason

 

In other words, the TV’s motherboard had leaks that do electromagnetic noise (at high frequency) and that’s why the remote-STB IR link had interferences.

 

We checked it disconnecting the power from the TV and then the remote worked properly from the corridor! 

 

There are 2 ways to fix it:


1-->Change the TV because is not healthy  and could affect any electronic device around.


2--> Buy a new ferrite but it isn’t the best way and could not suppress that electromagnetic field.

 

 

Have a nice day!

 

Xevi

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