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MX8550
4.2.1.7 Check Diplexer
Test Point
Ant Port
Checking Flow
Checking Flow
Start
Check pin2, 4
at F105. Referring to
Figure 4.2.2.8.
Is it similar?
NO
Replace F 105
LG Electronics Inc.
Test Point
F105
DCN Port
Diplexer is
OK
YES
Circuit Diagram
Circuit Diagram
PCS Tx
DCN Tx
PCS Rx
DCN Rx
TP1
Waveform
Waveform
TP2
DCN Port
ANT Port
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