LG LG-K430DSF - Page 23

23
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3. TROUBLE SHOOTING
3.5 GSM RF PART
3.5.5 Checking RF Signal RX path(GSM1800/1900)
Image
Checking Flow
TP2
Circuit Diagram
TP3
TP1
TP4
TP2
TP4
TP3
TP1
START
Check TP1/2 Signal exist?
NO
Replace U1002
YES
Check TP3/4 Signal exist?
NO
Check Component
above RF signal
path
YES
Check Transceiver
physical damage
or soldering condition
Replace U1500
NOT
GOOD
OK?
Check next step