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TP4 is over 21dBm?
TP5 is over 21dBm?
TP2 is over 21dBm?
TP1 signal is exist?
Signal is over 3dBm?
or soldering condition
OK?
LGE Internal Use Only
START
Check TP4
No
Check TP5
No
Check TP1/TP2
YES
No
Check TP3
SKIP
No
Check Transceiver
physical damage
Check next step
Yes
Check FL1201 Soldering
Yes
Check U1200 Soldering
Yes
Check FL1200 Soldering
No
Yes
Check U1300 Soldering
NOT GOOD
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3. TROUBLE SHOOTING
Replace U1500
Only for training and service purposes
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