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Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
ͽͶ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑ΟΝΪ
2. TROUBLE SHOOTING
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SETTING : After initialize Agilent 8960, Test EGSM900, DCS mode ( or GSM850, PCS mode )
CHECKING FLOW
START
NO
YES
Microphone will work
properly.
YES
Check the signal
Level at each side of MIC201.
(TP2, TP3) Is it a few tens
mV AC?
Check the soldering of
TP4, TP5
Make a phone call,
then check TP1 mic bias signal
comes from U102?
NO
Change the microphone
YES
NO
Resolder component
1. Check mic Bias signal line
2. Change the U102
Check microphone sound hole