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Check TP5 Signal exist?
Check TP6 Signal exist?
Check TP1 Signal exist?
Check TP2 Signal exist?
Check TP3 Signal exist?
Check TP4 Signal exist?
Check Transceiver physical damage
or soldering condition
OK?
LGE Internal Use Only
START
Yes
Yes
Yes
Yes
Yes
Yes
Check next step
No
Check SW1101 soldering
No
Check C1110 soldering
No
Check U1100 soldering
No
Check C1118 soldering
No
Check FL1104 Soldering
No
Check component above RF signal path
between FL1104 and U1500
NOT GOOD
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3. TROUBLE SHOOTING
Replace U1500
Only for training and service purposes
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