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CHECKING FLOW
SETTING : After initialize Agilent 8960, Test EGSM900, DCS mode ( or GSM850, PCS mode )
START
Check microphone sound hole
Make a phone call,
then check TP1 mic bias signal
comes from U102?
YES
Check the signal
Level at each side of MIC201.
(TP2, TP3) Is it a few tens
mV AC?
YES
Check the soldering of
TP4, TP5
YES
Microphone will work
properly.
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. TROUBLE SHOOTING
NO
1. Check mic Bias signal line
2. Change the U102
NO
Change the microphone
NO
Resolder component
96/136
- 97 -
4. TROUBLE SHOOTING
LGE Internal Use Only
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