LG C3400 Service Manual page 63

4. Troubleshooting
(5) Checking TX IQ
TEST POINT Waveform
U502
C519 C526
Graph 4-8
Figure 4-13
CIRCUIT
Checking Flow
No
Check if there is
Replace U102
Similar?
Any Major Difference
Refer to Graph 4-8
Yes
Redownload the Software
And calibrate
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