LG -ID3100 Service Manual page 37

LG-ID3100
Checking Flow
SETTING : After initialize 5515C, Test US Cellular
START
No
No
Voltage at TP1 = 1.2V? Check the soldering
Re-solder R326
(MIC BIAS Voltage Check) Of R326
Yes Yes
Replace U201(QSC6010)
Check the signal level
No
Replace the U302(MIC)
at TP2 of U302(MIC)
Is It a few tens mV(AC)?
Yes
No
Check the soldering of
Re-solder TP3(C321)
TP3(C321)
Yes
No
Does MIC work Properly? Replace U201(QSC6010)
Yes
MIC will work properly
LGE
LG Electronics Inc.
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