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8-3-4. Microphone Part (MAIN MIC)
Check microphone function
in voice call RCV mode
or in voice recording mode
Check 11pin USB FPCB
where MIC is placed
for any damage (Tear in
FPCB, etc)
Check component soldering
status of L400, L401, C400,
Check the voltage at
TP402 = 2.8V
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Yes
Yes
C401.
Yes
Yes
END
No
Replace the 11pin USB FPCB
No
Replace L400, L401, C400, C401
No
8-11
Level 3 Repair
Replace U404
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