LG LG-X230DS - Checking RF Signal RX Path

LGE Internal Use Only
3. TROUBLE SHOOTING
3.4.1.2 Checking RF Signal RX path(GSM850/GSM900/DCS1800/PCS1900)
3.4 GSM RF PART
Circuit Diagram
Checking Flow
Image
TP1
Main
Top
TP1
TP2
TP3
TP4
TP2
TP3
TP4
Check TP1
Re-solder or Change
Check TP2
YES
YES
NO
NO
Re-solder or Change
Check TP3
Re-solder or Change
YES
Check TP4
NO
START
GSM RX Path is OK
Re-solder or Change
NO
YES
Copyright ⓒ 2017 LG Electronics. Inc. All right rese
rved. Only training and service purposes
19
19