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LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
LGE Internal Use Only
CHECKING FLOW
START
Check Wireless FM
FM Radio is working well?
NO
YES
YES
FM_radio will
work properly
Check condition of
matching components
(L401, C403, C404)
FM Radio is working well?
NO
YES
Give the additory solder in
(L401, C403, C404)
Check Bias Voltage
2V93_Vext at C412
VBAT at C411
YES
NO
Replace
U103
YES
NO
Replace
U103
FM_Radio work is good?
NO
Replace
U401
Check BT_32k?
(TP2)
Check 3.5Phi Ear-Mic
Works good?
Check TP1
NO
Change U302
YES
NO