LG LG-H815 - Audio Troubleshooting

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3. TROUBLE SHOOTING
3.19.1 Audio - Speaker
Circuit Diagram
Image
Checking Flow
It’s trouble shooting guide for sound mute case. (don’t hear)
Speaker control signals are generate by MSM8992-B(U2100), WCD9330(U6100) Speak Boost_Amp (U6200)
Start
Check the Speaker sound
and check Speaker contact.
Hear the sound from
the Speaker?
No
Change Speaker
Module.
Can you hear a
sound?
Yes
No
Yes
End
Change Main Board
2. Check
Main PCB part (FB6930,
FB6931 L6700, L6701)
(CN6200, CN6201)
Speaker signal OK?
No
Yes
CN6200 CN6201
L6701
L6700
FB6931 FB6930
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