LG LG-K430DSF - Page 46

3. TROUBLE SHOOTING
46
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3.7 LTE RF PART
3.7.5 Checking RF Signal RX path(LTE B7)
Image
Checking Flow
START
Check TP1 Signal exist?
Replace U1002
NO
YES
Check TP2 Signal exist?
NO
Check FL1111
Soldering and
Check
Component
above RF signal
path
YES
Check Transceiver
physical damage
or soldering condition
Replace U1500
NOT GOOD
OK?
Check next step
Main
Top
U1500
TP2
TP1
TP1
TP2
Circuit Diagram