4. TROUBLE SHOOTING
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Only for training and service purposes
LGE Internal Use Only
SETTING : After initialize Agilent 8960, Test EGSM900, DCS mode ( or GSM850, PCS mode )
and change speech to echo mode.
CHECKING FLOW
START
NO
YES
YES
Check the voltage
Level at TP2 Is
around 1V?
Can hear your voice
through the earpiece?
Make a phone call,
then check TP1 mic bias voltage
Is around 2V?
NO
Change the microphone
YES
NO
Go to speaker trouble.
Re-download
or replace U102
Check microphone hole
YES
Microphone will work
properly.