LG KG245 Service Manual page 60

(5) Checking TX IQ
TEST POINT
C425
C427
U401
Figure 4-10 (a). TX IQ
CIRCUIT
CHECKING FLOW
C423 2p
L403
5.6nH
C425 1.8p
C426 1.5p
L404
6.8nH
C427 1.5p
C428 12p
Figure 4-10 (b). TX IQ
Check if there is
Any Major Difference
Refer to Graph 4 -8
Redownload the Software
And calibrate
4. TROUBLE SHOOTING
WAVEFORM
17
18
19
20
21
22
23
24
No
Similar?
Yes
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Graph 7
RFIPP
RFIPN
RFIDP U401
RFIDN
SI4210
RFIEP
RFIEN
RFIAP
RFIAN
Replace U101