Samsung SM-G975F Service Manual page 98

8. Level 3 Repair
8-4-9-2. Microphone Part - Sub(2nd) MIC
Check Sub(2nd) microphone function
in voice call loudSPK mode
or in camcording mode.
mode
Yes
No
No
Check the voltage at
Replace U9000
R9008 = 1.8V
Yes
No
No
Check the
SUB_MIC_DATA at
Replace MIC9000
C9035.
Yes
No
END
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