LG LM-X120HM Service Manual page 57

3.5 GSM, WCDMA, LTE PART
3.5.3 LTE RF PART
Checking RF Signal PRX path(LTE_B28A)
START
OK
Check TP1
NO
OK
Check TP2
NO
Change U1301
and retest
Circuit Diagram
TP1
LGE Internal Use Only
Checking Flow
Change U1513/L1554/C1532/L1553
and retest RF conductive
Change U1406/C1536/L1556/
U1511/L1516/L1558/L1557/
C3517/C1539 and
retest
TP2
Main
bot
U1701
U1513
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57
3. TROUBLE SHOOTING
Image
Only training and service purposes
U1522