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MIC Working
Operate MIC
NG
Pollute
MIC Hole?
NO
Check
C418 = Anal
og Signal
YES
Change MIC
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YES
Clean up
MIC hole
Check C424.
Check MIC 4th pin
(V_MIC_2.2V)
NO
= 2.2 ?
YES
Change MIC
8-17
Level 3 Repair
NO
Change main PBA
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