LG lg-d821 - Audio Troubleshooting

3. TROUBLE SHOOTING
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3.8 Audio troubleshooting
3.8.1 Speaker troubleshooting
It’s trouble shooting guide for no sound case.
Speaker control signals are generate by MSM8974(U3000), WCD9320(U10000).
START
Check the Speaker Module
And reconnect Speaker Module
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
Speaker Sound is OK?
Change the WCD9320(U10000)
Is Speaker Sound OK?
END
END
END
END
END
END
Change The main PCB
Change the Speaker Module.
Is Speaker Sound OK?
Check the c-clip for Speaker Module
Is Speaker Sound OK?
Check Lower FPCB
part(L16000,L16001)
Is Speaker Sound OK?
Check the Lower FPCB
Is Speaker Sound OK?