LG LG-K430DSF - Page 58

58
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3. TROUBLE SHOOTING
Main
Top
T
U1100
U1500
TP2
FL1102
U1002
TP1
3.7 LTE RF PART
3.7.14 Checking RF Signal TX path(LTE B28B)
Checking Flow Image
P3
START
Check TP1
Signal is over 21dBm?
NO
Replace U1001 and
Check Component
above RF signal path
YES
Check TP2/3
Signal is over 23.5dBm?
Replace U1100
NO
YES
Check Transceiver
physical damage
or soldering condition
Replace U1500
NOT GOOD
OK?
Check next step