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Flow Chart of Troubleshooting
9-12
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MIC Working
Operate MIC
NG
Insert correctly
Insert
MIC rubber
correctly?
NO
YES
Pollute
MIC Hole?
YES
Clean up
MIC hole
NO
Check
C516 = High?
Change main PBA
NO
Remove MIC,
Check MIC 5th pin
(MIC_BIAS_1.8V)
= 1.8V ?
NO
Change MIC
YES
YES
Change MIC