LG LG-K430DSF - Page 47

3. TROUBLE SHOOTING
47
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Main
Top
Image
TP2
U1500
TP1
3.7 LTE RF PART
3.7.6 Checking RF Signal RX path(LTE B28A)
START
Checking Flow
Check TP1 Signal exist? Replace U1002
NO
YES
Check TP2 Signal exist?
YES
Check FL1103
Soldering and
Check
Component
NO
above RF signal
path
Check Transceiver
physical damage
or soldering condition
OK?
NOT GOOD
Replace U1500
Circuit Diagram
TP1
TP2
Check next step