Samsung Galaxy Note 3 SM-N900 Sub ,Second Mic not working Solution

Samsung Galaxy Note 3 SM-N900 Sub ,Second Mic not working Solution  Schematic, Diagram , Circuit 

Samsung Galaxy Note 3 SM-N900 Sub ,Second Mic not working Solution Step by Step 

Step 1

Check Sub(2nd) microphone function

in voice call loudSPK NS Off mode

or in camcording mode

Step 2

Check PCB where Sub MIC

(MIC701) is placed

for any damage

Replace the PCB module

Step 3

Check the voltage at

C753 = 2.8V

resolder or replace U703

Step 4

Check component soldering

statuses of L701, L702

Resolder or replace L701, L702

Step 5

END

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