Audio Troubleshooting - LG KF390 Service Manual

4.12 Audio Troubleshooting

4.12.1 Audio Block Diagram
MSM6280
4.12.2 Audio Component
Audio Amplifer for
Speaker
Main PCB (TOP side)
Main PCB (Bottom side)
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Only for training and service purposes
Audio AMP
(U401 )
FPCB
Capacitors for
Headset Receiver
Microphone
- 103 -
4. TROUBLE SHOOTING
MIC2P / HPH_L , HPH_R
MIC1P
C425
Connector for
Speaker
Main PCB (Bottom side)
FPCB Assy ( include Receiver )
LGE Internal Use Only
Speaker
Receiver
Headset
Microphone