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Level 3 Repair
Main MIC Working
Operate MIC
NG
Pollute
MIC Hole?
NO
Check
C460 = High?
YES
Change MIC
YES
NO
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Clean up
MIC hole
Remove MIC,
Check MIC 4th pin
(MIC_BIAS_1.8V)
= 1.8V ?
YES
Change MIC
8-16
NO
Change main PBA
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