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This solution can be used as  a guide to fix or repair Nokia N97 microphone problem issues. A failure that no voice can be heard from the caller on the device.

This solution solution shows the components location of Nokia N97 microphone circuit that needs to be check if the problem occurs.
Repair tips:
Ensure to restore or flash the device firmware first before trying to calibrate hardware components.
If flash firmware updating  is already been done and nothing happens , you may then proceed to troubleshoot hardware components.
a) Trace and check the supply lines paths of the microphone module.
b) Check and or replace the resistors highlighted on solution above, the two resistors have 0 ohms resistance value while the other one has 100 ohms.
c) If all the resistors seems all working and or already replaced and the supply voltage is okay, you may then replace the digital microphone module.

For further troubleshooting Nokia N97 Microphone failure, there are instances that you may need to rework the audio IC(AVILMAS) and sometimes the problem lies on a faulty CPU IC (RAPIDO).

if mic is not working in Nokia 5233 our voice can not be reached to destination mobile during voice call and we can not record audio recording in it.to solve this mic problem in Nokia 5233 you can follow a few steps as given in post bellow.

in above diagram there are some different color lines which are to define tracks of mic and parts that are used in it.check these path with meter and if any of them is missing then apply jumpers as shown in above diagram.
if any part is missing or damage replace those parts with new that you can get from other mobile boards.
for more detail and new tips and tricks about cellphone service problem keep visiting this page we will update daily this blog timely with other mobile solution.

Nokia X2-02 Mic Ways
Nokia X2-02 Mic Not Working
Nokia X2-02 Mic Solution

Nokia 2330 Classic then you can not make a voice call and also you will not be able to make call recording in it.to solve this mic problem in Nokia 2330 Classic you can follow a few steps and can look at diagram bellow all cellular mobile repairing solution here nokia 105 white lcd light problemIn above diagram you can see mic and its ways all mic tracks are given in different colors and you can apply jumpers as shown in it.
You can replace mic also with this diagram and following to its tracks you can fix microphone problem in Nokia 2330 Classic.
for more detail and new tips and tricks about cellphone service problem keep visiting this page we will update cellphone service diagrams timely with new cellphone diagrams.some related post are also given bellow you can read them also for more information about cellphone.

If mic is not working in Nokia X2-05. Microphone solution with jumpers, Low voice of Nokia X2-05 mic problem solution, Nokia X2-05 mic jumpers to make it solve.Nokia X2-02 Keypad Not Working Problem Solution Jumper Ways

If mic is not working or have a low voice it can be fault of mic and housing. Check Nokia X2-05 housing ( body ). All housing have a small whole at the point of mic. In some cases rust or dust cover this point and the voice can not reach proper to the mic point so make it clean if there is some dust on it.
After dis assembly of Nokia X2-05 look at the motherboard for rust carbon or burn parts. If you found some rust or carbon apply electronics cleaner on the mother board and apply hot air to make it dry proper.
Applying too much heat can damage the mother board and parts.It also can be harm for your skin.So keep in mind about normal heat flow when making it dry.
Remove mic and check all these tracks that are provided in above diagram to solve mic problem in Nokia X2-05. In diagram two different color lines are given to identify all parts that are used to solve Nokia X2-05 mic problem with jumpers.
If some parts are missing or damage apply jumper on these points where small circles are pointing in nokia mic repairing diagram above.