LG KE600 - Cell Phone Service Manual page 107

5. Trouble shooting
Checking Flow
Figure 12 Mobile SW
Check Pin 1, 2 of SW601
with RF Cable
Signal is OK ?
Yes
Control signal Check (R601,
R602, R603) of FL601?
Yes
Control Signal is
OK?
Yes
C614, C615,
C616, C617
Signal is
normal ?
Yes
Mobile SW & FEM is OK.
See next page to check I/Q
Signals.
No
Replace Mobile SW
(SW601)
No
Check PMB8876 (U101)
No
Replace FEM (FL601)
EGSM RX
Figure 13 FEM Control Signals
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ANT_SW1
(R601)
ANT_SW2
(R602)
ANT_SW3
(R603)