LG LM-X120HM Service Manual page 60

3.5 GSM, WCDMA, LTE PART
3.5.3 LTE RF PART
Checking RF Signal PRX path(LTE_B28B)
START
OK
Check TP1
NO
OK
Check TP2
NO
Change U1301
and retest
Circuit Diagram
TP1
LGE Internal Use Only
Checking Flow
Change U1513/R1513/L1531/R1530/
L1564/C1531/L1563/U1523
and retest RF conductive
Change U1406/C1529/L1515/
U1511/L1516/L1558/L1557/
C3517/C1539 and
retest
TP2
Main
bot
U1701
U1513
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60
3. TROUBLE SHOOTING
Image
U1511
Only training and service purposes