LG -D618 Service Manual page 74

3.7.2 Checking GPS
Check ANT1103
Check WTR2605
LGE Internal Use Only
START
Yes
Check TP1
R1103 is 1.8v
L1118 is 2.7v
Yes
Check TP2
Signal exist?
Yes
ANT 1103 : Ant. Contact
U1102 : GPS LNA
FL1105 : SAW Filter
U1500 : WTR2605
U4100 : PM8226
X4100 : Crystal
No
Remove the foreign substance in ANT1103
No
Check U4100
No
Check X4100
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3. TROUBLE SHOOTING
Only for training and service purposes