Heres the solution for Nokia 2710 navigation edition when trying to fix a microphone problem issues. Its a failure on the hardware which there is no
audio sound can be heard over the receivers
earpiece speaker.
This solution simply shows the location of the components where
you may to have a check or replace if found damaged. In Nokia 2710ne,
the cell phone microphone is installed or mounted on the bottom side of the
PCB board, and also all of its corresponding circuit components such as the filter coils or surface mount inductors, chip resistors and chip capacitor were also mounted near to it.
Nokia 2710NE Mouthpiece microphone circuit components and test spots
This also includes the circuit connection line paths (mic ways) for easy tracing procedures. The three lines paths corresponds to the polarity of the audio
signals, the red line is for the positive, the blue line is for negative and the bright green lines correspond as the positive voltage bias of the microphone. If this voltage bias when cut or damaged it will also result to a poor audio
signal level or no microphone audio signal.
