Check Mobile Sw & Ant Sw - LG KG110 Service Manual

4. TROUBLE SHOOTING
4.2.3 Check Mobile SW & ANT SW
Check Mobile SW
C403
L412
Check ANT feed point,
If ANT touch PCB tightly
Check mobile SW port:
SW400.ANT . Check if
signal is existed
Check mobile SW port:
SW400.RF . Check if
signal is existed
SW400
KMS-507
G1 G2
L410
3.3nH
1.2P
L411
2.2nH
47nH
C440
15p
Tightly?
Signal is existed?
Signal is existed?
See next page to check
ANT SW
SW400.ANT
SW400.RF
NO
YES
NO
YES
NO
YES
32
Figure 4-5
Press ANT tightly
Change ANT matching
circuit
Change SW400