Lenovo S660 Service Manual page 30

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