LG Optimus L3 E400 Mic Solution Microphone Problem Ways


LG E400 Mic Ways Problem Jumper Solution

Here’s the LG Optimus L3 E400 Solution for not working mic problem. This solution below shows the complete connection tracks of the microphone that can be used for deeper microphone problem troubleshooting.

To fix or repair mic problem on LG E400, you may first check the microphone module using a multimeter or replace it with a new one to securely confirm that the microphone is still working or not damaged.
If the Microphone is okay, clean the mic’s terminal contact pads. Refer to the solution below and do some check and test procedures.

LG Optimus L3 E400 Mic Problem Repair Solution

lg e400 mic problem ways jumper solution

LG Optimus L3 E400 MIC jumper ways on IC solution
Trace The MIC’s positive connection ( the inner core layer) down to the filter coil and then check also the filter coil and the ESD protection diode. Replace if necessary. Check also the Mic’s grounding lines ( outer core layer).

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