LG LM-X120HM Service Manual page 27

3.5 GSM, WCDMA, LTE PART
3.5.1 GSM RF PART
Checking RF Signal RX path(GSM1900)
START
NO
Check TP1
NO
Check TP2
NO
Change U1301
and retest
LGE Internal Use Only
Checking Flow
OK
Change U1513/L1536/C1521/
L1537 and retest RF conductive
OK Change U1516/L1538/C1522/
L1539/C1523 and retest
Main
bot
U1516
U1513
Circuit Diagram
TP1
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27
3. TROUBLE SHOOTING
Image
U1301
TP2
TP1
TP2
Only training and service purposes