LG LG-X230DS - Audio_Ear MIC

LGE Internal Use Only
3. TROUBLE SHOOTING
Image
Checking Flow
Start
Check MIC
BIAS1 Volta
ge
Check
R311,R313,
B303 solder
ing
Re-solder or change
U2001
Re-solder or change
R311,R313,B303
Earphone SPK functio
n ok
Check J301
good conta
ct with MB
Re-solder or change
J301
No
Yes
No
Yes
No
Yes
TP4
3.9 Checking Audio Block
3.9.3 Audio_Ear MIC
Disable detecting headset insert or No sound from Earphone, Check the Ear Mic and PMU(U401).
TP2
TP1
TP3
Copyright ⓒ 2017 LG Electronics. Inc. All right rese
rved. Only training and service purposes
TP4
TP1
TP3
TP2
Circuit Diagram
53