LG LM-X120HM Service Manual page 53

3.5 GSM, WCDMA, LTE PART
3.5.3 LTE RF PART
LTE RF Part (B17)--- TX
Checking Flow
START
Check TP1
NO
Check TP2
NO
Check TP3
NO
Change U1301
and retest
LGE Internal Use Only
Change U1513/L1511/C1511/
OK
L1570/C1540 and retest RF
conductive
OK
Change U1512/L1540/C1520/
L1541 and
retest
OK Change U1402/C1448/L1418/
L1426 and retest RF
conductive
U1402
TP3
U1513
TP1
TP2
53
3. TROUBLE SHOOTING
Image
Circuit Diagram
Copyright ⓒ 2019 LG Electronics. Inc. All right reserved.
Only training and service purposes
U1512
TP2
TP3
TP1