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4. TROUBLE SHOOTING
CHECKING FLOW
SETTING : After initialize Agilent 8960, Test EGSM900, DCS mode ( or GSM850, PCS mode )
Check microphone sound hole
Make a phone call,
then check TP2 mic bias signal
comes from U102?
Check the signal
Level at each side of TP1.
Check the soldering of
TP3,TP4,TP5,TP6,TP7
Microphone will work
LGE Internal Use Only
START
YES
Is it a few tens
mV AC?
YES
YES
properly.
4. TROUBLE SHOOTING
1. Check mic Bias signal line
NO
2. Change the U102
NO
Change the microphone
NO
Resolder component
89/140
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