Audio Troubleshooting - LG -V909DW Service Manual

4.12 Audio troubleshooting

4.12 Audio troubleshooting
4.12.1 Speaker troubleshooting
4.12.1 Speaker troubleshooting
Speaker control signals are generated by WM8994(U800)
Speaker control signals are generated by WM8994(U800)
Speaker is the intergrated in two kinds of Main/Sub spk module
Speaker is the intergrated in two kinds of Main/Sub spk module
Change the SPK
Lower FPCB
LGE Internal Use Only
Start
Check the Speaker sound, and
Reconnect the Main/SUB SPK Module
Speaker sound is ok?
Change the
Main/SUB SPK Module if you confirm
manual soldering.
sound is ok?
Check the
waverform of
TP1, TP2, TP3
OK?
Change the Audio
Codec ic
Speaker Sound is OK?
END
END
END
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4. TROUBLE SHOOTING
Only for training and service purposes