Table of Contents
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CHECKING FLOW
START
Check of Ear jack condition
A condition is good?
YES
Check condition of
matching components
(TP1_L200, TP2_C203)
A condition is good?
YES
Check Bias Voltage
VDD_FMR
YES
LGE Internal Use Only
NO
Replace J200
NO
Give the additional
solder in
TP1, TP2
NO
Replace
U100
FM Radio will
work properly
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4. TROUBLE SHOOTING
START
Check of wireless condition
Check condition of
intenna
A condition is good?
YES
Check FM LNA Bias
(FM_LNA_EN)
A condition is good?
YES
Copyright © 011 LG Electronics. Inc. All right reserved.
Check Ant pad on PCB/
NO
Antenna in rear case
NO
Replace
Q400/Q401
Only for training and service purposes
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