LG LM-X120HM Service Manual page 62

3.5 GSM, WCDMA, LTE PART
3.5.3 LTE PART
Checking RF Signal TX path(WCDMA/LTE_B4)
Checking Flow
START
OK
Check TP1
NO
OK
Check TP2
NO
OK
Check TP3
NO
Change U1301
and retest
LGE Internal Use Only
u1301
Change U1513/L1561/L1559/
L1560/ and retest RF
conductive
U1502
Change U1502/L1409/L1410/L141
1 and retest
u1513
Change U1402/C1466/L1419/
C1465/C1463and retest RF
conductive
TP3
TP1
TP1
62
3. TROUBLE SHOOTING
Image
Circuit Diagram
TP3
Copyright ⓒ 2019 LG Electronics. Inc. All right reserved.
Only training and service purposes
u1402
TP2
TP2