LG LG-P970 - Page 153

4. TROUBLE SHOOTING
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4.12.4 SUB MIC troubleshooting
Sub MIC control signals and power are generated by TWL5034 (U402).
Reconnect the VCAM FPCB.
and check the Sub MIC.
Speaker phone call is OK?
No
END
Yes
START
Check the TP1.
Bias range 1.8V~2.2V
OK?
No
Change the VCAM PCB
Speaker phone call is OK
END