LG KF600w Service Manual page 57

Check pin2(TP1) at U101
Check if there is any major difference referring
To Figure 4.1.2 (e). Is any signal detected at
that point?
Check pin4(TP2) at U102
Check if there is any major difference referring
To Figure 4.1.2 (f). Is any signal detected at
that point?
Is any signal detected at
that point?
Check pin6(TP3) at DP102
Check if there is any major difference referring
To Figure 4.1.2 (g). Is any signal detected at
that point?
Is any signal detected at
that point?
RF signal path is OK. See next page to Rx I/Q data signal
Checking Flow
Checking Flow
Start
YES
YES
YES
YES
YES
Replace U101
NO
Replace U102
NO
Check C198,L109,C114
NO
Replace DP102
NO
Check C124,L117,C128
NO