Check Tx I/Q Signal - LG KG110 Service Manual

4.3.3 Check TX I/Q signal

Figure 4-12
Check C433,C421
Check if there is any
Major Different
? Refer to Graph 4-8
Q signal
I signal
Similar ?
YES
See next page to check
TX ramp control signal
Graph 4-8
39
4. TROUBLE SHOOTING
IP
C433
IN
C433
C421
39p
NO
Replace U101
C421
39p
QP
QN