Here is a chart that can be used for keyboard solution in this diagram, the Nokia 5030 is designed with different colors, so everyone can easily understand the main path and track.
if one or a few keys do not work ok in your Nokia 5030 can can missing.you jumpers that path with all these electronic meters and one of them is broken to inert or key jumper by color scheme.in IC also you can see outre same color scheme is used for indicating what is important to check that is using pin IC.
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