LG CU920 - Receiver Path Audio Output Troubleshooting

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4. TROUBLE SHOOTING
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4.18 Headset path
MSM6281 HPH_R, HPH_L → R802, R801 → CN801 (MMI Connector)
Start
Conne ct the phone to network
equipme nt and setup c all.
Setup 1 KHz tone out
and in sert h eadset.
Can you he ar the tone ?
Change the Headset
YES
NO
END
Sine wave appears at
R802, R801?
Change the Main boa rd
YES
NO