Lenovo S660 Service Manual page 30

BB-12 Audio function fail (Audio 不良) (2/4)
 Receiver path:
PMU輸出音頻信號
PMU output audio signal
 Phone MIC path
MIC信號輸入到
PMU進行音頻處理
MIC signal input
to PMU to
process audio
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聽筒無聲,優先check 0om是否 通
Check 0Com first if receiver is not functional
為MIC提供偏置電壓
Provide bias voltage for MIC
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