LG LM-X120HM Service Manual page 54

3.5 GSM, WCDMA, LTE PART
3.5.3 LTE RF PART
LTE RF Part (B17)---PRX
START
Check TP1
NO
Check TP2
NO
Change U1701
and retest
LGE Internal Use Only
Checking Flow
OK
Change U1513/L1540/C1520/
L1541 and retest RF conductive
OK
Change U1512/L1551/R1511/
R1512/C1501/C1502and Matching
circuit retest
Main
Bot
Circuit Diagram
TP1
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54
3. TROUBLE SHOOTING
Image
TP1
Only training and service purposes
U1701
TP2
U1523
U1513
TP2