LG U310 Service Manual page 88

START
Check TP1
0.5V < TP1 < 2.5V
YES
Check TP2, TP3
If GSM TP2=High , TP3=Low
If DCS/PCS TP2=Low , TP3=High
YES
Check TP4
2.8V < TP4 < 3.0V
YES
Check TP5, TP6
0dBm < TP5, TP6 < 5dBm
YES
TXVCO(X100) is OK
Check other parts
4. TROUBLE SHOOTING
NO
Check RTR6250
NO
Check Soldering
& MSM6250A
NO
Check PMIC(U401)
Check PMIC(U403)
Check Soldering of
NO
TXVCO(X100)
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