LG KF600w Service Manual page 86

4.2.2.7 Check Diplexer
Test Point Circuit Diagram
Test Point Circuit Diagram
TP2
Ant Port
PCS Port
U102
TP1
Checking Flow Waveform
Checking Flow Waveform
Start
PCS Port
Check pin3(TP1) at DP102
Diplexer is
2(TP2) at U102 . Referring to
OK
Figure 4.2.2(k)
YES
Is it similar ?
NO
Replace U 102
ANT Port
Figure 4.2.2(k)