LG S5000 Service Manual page 54

(4) Checking RX IQ
Test Points
U501
Figure 4-5
Waveform
Checking Flow
Check C522,C524.
Check if there is any
Major difference
Refer to graph 4-3
C525
XOUT
8
BIP
7
BIN
6
BQP
5
BQN
C527
Graph 4-3
Similar?
Yes
Redownload software and calibration again
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4. TROUBLE SHOOTING
CIRCUIT
C522
39p
C524
39p
No No
Replace U501
IP
IN
QP
QN