LG LG-P970 - Audio Trouble

4. TROUBLE SHOOTING
- 147 -
Copyright © 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4.12 Audio trouble
4.12.1 Speaker troubleshooting
Speaker control signals are generated by TWL5034 (U402), amplified by WM9093 (IC601), and Power is supplied by
Battery (VBAT).
Reconnect ANT. FPCB.
and check the speaker sound.
Spker sound is OK?
No
END
Yes
START
No
Change the ANT. FPCB.
Speaker sounds OK?
Change the Audio codec IC
Change the speaker module
Yes
Check the waveform of TP1.
Waveform is OK?
END
Yes
No
Check the waveform of TP2.
Waveform is OK?
Change the Main PCB
Yes
Speaker sound OK
END