LG KP550 Service Manual page 98

Figure 30 Mobile SW
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Only for training and service purposes
Checking Flow
Check TP1 of SW600
with RF Cable and TP2 of C606
TP1 Signal same
as TP2?
Yes
Check TP3, TP4 of FL600
Yes
Control Signal is
OK
Yes
TP5 Sig nal is
OK ?
Yes
Mobil e SW & FEM is OK.
Check Antenna.
No
Repl ace Mobil e SW
(SW600)
No
Replace BB CHIP (U100)
No
Replace FEM (FL600)
EGSM TX
Figure 31 FEM Control Signals
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5. Trouble shooting
TP2(ANT SW2)
TP1(ANT SW1)
LGE Internal Use Only