Samsung SM-G975F Service Manual page 97

8. Level 3 Repair
8-4-9-1. Microphone Part - Main MIC
Check main microphone function
in voice call handset mode or voice recorder.
Yes
No
No
Check the voltage at
Replace U9000
C9030 = 1.8V
Yes
No
No
Check the
MAIN_MIC_DATA at
Replace AU9000
C9033.
Yes
No
END
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