LG KG70c Service Manual page 27

KG70C
3.1.6 Checking Rx I/Q data 3.1.6 Checking Rx I/Q data
Test Point Test Point
Waveform Waveform
R135 (Rx_ I_P) R135 (Rx_ I_P) R135 (Rx_ I_P)
Graph 3-1-4(a) Graph 3-1-4(a)
Checking Flow Checking Flow
Check R138,R137,R136,R135 Check R138,R137,R136,R135
Check if there is Check if there is
Any M ajor Difference Any M ajor Difference
◆ Refer to Graph 3-1-4(a,b) ◆ Refer to Graph 3-1-4(a,b)
R138 R138
R137 R137
R136 R136
R135 R135
Figure 3-1-6 Figure 3-1-6
R138 (Rx_Q_P) R138 (Rx_Q_P) R138 (Rx_Q_P)
Software Calibrate Software Calibrate
U107 U107
No No
Similar? Similar?
Yes Yes
Redownload the Redownload the
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R136 (Rx_ I_N) R136 (Rx_ I_N) R136 (Rx_ I_N)
R137 (Rx_Q_N) R137 (Rx_Q_N) R137 (Rx_Q_N)
Graph 3-1-4(b) Graph 3-1-4(b)
Replace U107 Replace U107