LG KG271 - Page 69

4. TROUBLE SHOOTING
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Replace PCB
Check the voltage Level
of MIC_P
Check voltage level
of R300
Change Microphone
Check component
status around MIC
Re-solder or
replace the Component
Check status of MIC
Re-solder or
replace Microphone
YES
NO
OK
OK
NG
NG
MIC_P= about 1.2~1.5V DC
with a few tens mV
NG
Replace PCB
OK
R300.VMIC=2.5V
Make a call
Checking Flow