LG KF600w Service Manual page 69

4.2.1.4 Check DCN RF Tx SAW
Test Point
Test Point
F106
RF_OUT
Checking Flow
Checking Flow
Start
Check pin1(TP1)
at F 106 . Referring to
Figure 4.2.1(g)
Is it similar ?
Check pin4(TP2)
at F 106 . Referring to
Figure 4.2.1(h)
Is it similar ?
NO
Replace F 106
RF_IN
Check
U113(RFT6150)
YES
RF Tx SAW is
OK
YES
Circuit Diagram
Circuit Diagram
TP2
Waveform
Waveform
RF_IN fed up with CW signal
RF_IN
Figure 4.2.1(g)
RF_OUT
Figure 4.2.1(h)
TP1