3. TROUBLE SHOOTING
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3.17.5 Ear-MIC Troubleshooting
Ear MIC signal is generate by WCD9304 (U7000) and MSM8230 (U2000).
Disable to recognize headset insert
START
END
Change the Detect IC (U7002)
END
END
Change the Mainboard
Check the 3.5phi headset connector
or change that connector new one.
Is Ear-Mic Sound OK??
Check the left signal & detection
line became short when headset inserted. Is
detecting OK??
Detecting headset insert well??
Change the WCD9304 (U7000)
Is speaker sound OK??
No
No
No
No
Yes
Yes
Yes
Yes