3. TROUBLE SHOOTING
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3.8.5 Ear-MIC troubleshooting
Ear MIC control signals are generate by MSM8974(U3000), WCD9320(U10000), FSA8008UMX(U7001).
Case A. Unable detection of headset insert.
START
Didn’t display headset icon and did play sound via
Speaker although headset insert
Yes
Yes
Yes
No
No
No
Check the left signal and
detection line short when headset
inserted?
Change the WCD9320(U10000)
Is receiver Sound OK?
END
END
END
Change The main PCB
Check the EARJACK
sound play via headset?
Check the left signal(HPH_L) and detection line(EARJACK_DETECT) are shorted when headset inserted.
See PCB Contact terminal also.