LG LG-X230DS - Checking Audio Block; Audio_Rec

LGE Internal Use Only
3. TROUBLE SHOOTING
3.9 Checking Audio Block
Circuit Diagram
ImageChecking Flow
3.9.1 Audio_REC
The REC control signals are generated by PMU chip MT6328(U401), the PMU chip and the receiver are to be checked out.
Start
Check TP1
~TP4
Check REC
Re-solder or change
R703(TP3) R704(TP4)
Change receiver
Speaker function ok
Check PMU
(U401)
Change PMU(U401)
No
Yes
No
Yes
No
Yes
TP4
TP3
TP1
TP2
TP1
TP3
TP4
TP2
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