Lenovo S660 Service Manual page 32

BB-12 Audio function fail (Audio 不良) (4/4)
 耳機MIC電路 Earphone MIC Circuit:
耳機MIC信號通過差分電路進入PMU作音頻處理
Earphone MIC signal output to PMU to be process
by differential circuit
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為耳機MIC提供偏置電壓
Provide bias votage for
earphone MIC
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