LG LM-X120HM Service Manual page 45

3.5 GSM, WCDMA, LTE PART
3.5.3 LTE RF PART
LTE RF Part support LTE B1/2/3/4/5/7/8/17/28/66 with FEM, PAM, PA, Transceiver component
LTE RF Part (B8)---WCDMA-B8 DRX
Checking Flow
START
Check TP1
NO
Check TP2
NO
Check TP3
NO
Change U1301
and retest
LGE Internal Use Only
Change U1606/L1612/C1626/
OK
L1614 and
retest RF conductive
Change U1609/L1629/L1645
OK
and
retest
Change U1609/L1631/L1630
OK
/L1632/L1613
and retest
Main
Bot
U1301
TP3
Circuit Diagram
TP1
TP2
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45
3. TROUBLE SHOOTING
Image
TP1
U1606
TP2
U1612
TP3
Only training and service purposes