LG KF600w Service Manual page 81

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Check pin23(TP1) at U113
Check if there is any major difference referring
To Figure 4.2.2(c ).
YES
Check I/Q data(TP2) at U113
Check if there is any major difference referring
To Figure 4.2.2 (d ).
YES
Check pin1(TP3) at U113(TX_ON )
whether it is higher than 2.5V.
Check pin15(TP4) at U113(TCXO )
referring to Figure 4.2.2(e ).
Check pin2, 3, 4(TP5) at U113
Referring to Figure 4.2.2(f) Is it similar?
Replace U113
Checking Flow
Checking Flow
Is it similar?
Is it similar?
YES
Is it similar?
YES
YES
RFT6150 circuit is OK. See next page
YES
Check U 201
NO
Check TX_ON signal & MSM
NO
Check TCXO circuit.
NO
Check SBI signal line & MSM
NO
MSM6550