LG KG110 - Check Mobile SW & ANT SW

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