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CHECKING FLOW
START
Check of ear_jack condition
A condition is good?
YES
Check condition of
matching components
(TP1,TP2,TP3)
A condition is good?
YES
Check Bias Voltage FM LNA
(TP4,TP5)
YES
A condition is good?
YES
Check Bias Voltage
VDD_FMR(C124)
YES
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Only for training and service purposes
NO
Replace J201
NO
Give the additory
solder in
(TP1,TP2,TP3)
NO
Replace Q401,Q402
NO
Replace
U102
FM_radio will
work properly
- 105 -
4. TROUBLE SHOOTING
4. TROUBLE SHOOTING
START
Check of earless condition
NO
Check condition of
CN201 connection
A condition is good?
YES
Check Bias Voltage MUIC(U203)
(TP6,TP7,TP8)
A condition is good?
YES
Check Input & output
signal at MUIC
A condition is good?
YES
Replace CN201
NO
Replace U203
NO
Replace U102
LGE Internal Use Only
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