Nokia 5220 Keypad solution - Filter IC and Pin Connector Connection Line Tracks solution - In the past, when I started to start blogging, many thoughts disturbed me. I want to have a blog with a nice and interesting look. I am constantly looking for basic tutorials from some web and blogs on the internet. And thankfully, one by one I started to do it, and of course have to go through some confusion process first, but the most important of a blog that is content, yes on the blog
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Nokia 5220 Keypad solution - Filter IC and Pin Connector Connection Line Tracks solution
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Nokia 5220 Keypad solution - Filter IC and Pin Connector Connection Line Tracks solution
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Nokia 5220 Keypad solution - Filter IC and Pin Connector Connection Line Tracks solution
This is the solution for a damaged Nokia 5220 that result to keypads malfunction or keys not working. This solution shows the complete connection line paths of the keypad filter IC and through to the kepad flex Pin connector.
This solution also shows and includes the Power ON OFF key line paths.
There are two Keypad ESD-EMI filter is being used in the circuit. The keypad line paths used nine input and output filtering lines in the Filter IC while the power ON OFF key also shared in this filter IC.
Nokia 5220 keypad Not working solution
If trying to replace the keypad filter IC you may also trace and check first each of its corresponding connection line paths, while the Filter IC being removed and just inplaced a new one after ensuring that all the line paths is okay.
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