GSM FIX ALL PROBLEM

This solution covers for Nokia 7230 if the microphone failed or no voice sound can be heard over the receivers mobile phone. This solution is simple guide that lets you trace or check certain components on nokia 7230 PCB board that might cause the problem.
Check and ensure that the microphone module is okay or try to install a new replacement on it.
The solution above showed the components such as the filter coils and 47 ohms resistor if the microphone is okay. Replace these components if found damaged.

Heres the solution that might possibly help solve Nokia X6 mouthpiece microphone failure, a problem that no audio sounds can be heard from the other receiving device during a call is created.

The red lines indicated in the solution above is the microphones supply voltage if this voltage is cut or not present the mic will not tend to work. There are also resistors that where the digital audio signal is flow across to this components that has a resistance value of 100ohms each, check and replace it first  before attempting to replace the Digital Microphone Module.

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This is the Nokia solution for C2-01 Mic, mouthpiece microphone is not a problem. The solution repair guide below simply shows the paths connecting the microphone to solve problems.