Here's the solution covers for
Nokia C5 microphone problem
repair. This solution shows the location of the
digital microphone on the PCB board, including
the line paths that also needs to be trace and check like the microphone supply voltage, MIC clock and MIC data signal line paths.
These three line paths which need to check first before attempting to replace the
Digital Microphone Module.
Nokia C5 Microphone Failure Repair Solution
The mic supply voltage line paths is came from
the power management chip labeled as GAZOO. while the corresponding Data and Clock signal line paths is located near the CPU IC. There is a 47 ohms filter resistor is connected across the MIC clock signal, check and or replace it if found damaged or faulty.
If all the line paths is seems all okay, proceed to replace the MIC module.
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Nokia C5 MIC mouthpiece not working solution at my blog
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