LG LM-X120HM Service Manual page 38

3.5 GSM, WCDMA, LTE PART
3.5.2 WCDMA PART
Checking RF Signal PRX path(WCDMA/LTE_B4)
START
Check TP1
NO
Check TP2
NO
Change U1301
and retest
LGE Internal Use Only
Checking Flow
Change U1513/L1561/L1559/
OK
L1560 and retest RF conductive
Change U1502/L1566/L1562/
OK
L1565/C1538 and retest
Circuit Diagram
Main
bot
U1502
TP1
U1513
TP1
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38
3. TROUBLE SHOOTING
Image
U1301
TP2
TP2
Only training and service purposes