LG KG290 - Page 88

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4. TROUBLE SHOOTING
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START
Check soldering R221
NO
YES
Microphone will work
properly.
SETTING : After initialize Agilent 8960, Test EGSM, DCS mode
YES
Check the signal
Level at each side
of MIC200.
Is it a few tens
mV AC?
U204 working Properly?
Voltage VMIC of R221
= DC 2.8V?
NO
Replace microphone
YES
NO
Resolder U204
CHECKING FLOW