LG -P715 Service Manual page 99

4.13.3 Speaker/Speaker Phone path
MSM8225 LINE_OP, LINE_ON -> C6013,C6018(TP1) -> M6001 (TPA2055D3 : Audio Subsystem)
-> FB6003, FB6004(TP2) -> CN100
Connect the phone to network
equipment and set-up call.
Can you hear the 1kHz Tone?
The Sing wave appear at
The Sing wave appear at
or Change the Main PCB
LGE Internal Use Only
START
Set-up 1kHz tone out
No
C6013, C6018 (TP1) Pad
No
FB6003, FB6004(TP2)
No
Change the U2001
Yes
Yes
Re-contact or change the SPK module
Yes
Change the SPK module
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4. TROUBLE SHOOTING
END
Only for training and service purposes