LG LG-K430DSF - Page 28

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3. TROUBLE SHOOTING
3.5 GSM RF PART
3.5.10 Checking RF Signal TX path(GSM1800/1900)
Checking Flow Image
START
NO
Main
Top
U1100
Check TP1/2
If GSM1800/1900 Over
9dBm?
YES
Replace U1100
TP2
TP1
TP2
TP1
NO
Check Transceiver
physical damage
or soldering condition
OK?
Check next step
NOT GOOD
Replace U1500
TP1
Circuit Diagram
TP2