Here's the Nokia 2720 hardware repair solution for not working MIC (microphone) problem. This solution shows the MIC tracks connection line paths., and certain components that holds for 2720 fold nokia mobile phone microphone circuit.
Just refer to the solution below then locate the highlighted components on the PCB board and follow some procedures we provide.
1. Check the microphone for possible damaged using a multimeter, replace if found damaged.
2. Trace its corresponding connection line paths.
3. Check/resolder or replace all the corresponding connected components such as the capacitors and resistors.
4. If the procedures doesn't fix the problem, the possible faulty is the LITEPLUS IC, re-heat or rework it if necessary.
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