LG LG-K430DSF - Page 53

3. TROUBLE SHOOTING
53
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3.7 LTE RF PART
3.7.10 Checking RF Signal TX path(SW, LTE B3)
Checking Flow
Image
START
Main
Top
U1001
TP2
Check TP1
Signal is over 21dBm?
Check U1001
NO
Soldering
TP1
YES
Check TP2
Signal is over 21dBm?
Check U1002
NO
Soldering
Circuit Diagram
YES
Check next step
TP1
TP2