LG KP175 - Page 74

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4. TROUBLE SHOOTING
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
START
NO
YES
Microphone will work
properly.
SETTING : After initialize Agilent 8960, Test EGSM, DCS mode
YES
Check the signal
Level at each side
of MIC201.
Is it a few tens
mV AC?
Check the soldering of
C227,C228,C223
R219,R216
Check the
Voltage VMIC 2.5
V
NO
Change the microphone
YE
S
NO
Resolder component
Change the U102
CHECKING FLOW