LG U880 Service Manual page 77

4. TROUBLE SHOOTING
Check TP1
VCC of VCXO
VCC ≥ 2.8V
Yes
Check TP2
TRK_LO _ADJ
3V≥Voltage≥0V
Yes
Check TP3,4 ,5
With Oscilloscope
3V≥Voltage≥0V
Yes
VCXO is OK
Check oth er part
- 78 -
No
Check PMIC
No
Check MSM
No Check solde ring
and compon ents