LG LG-K430DSF - Page 26

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3. TROUBLE SHOOTING
3.5 GSM RF PART
3.5.8 Checking RF Signal TX path(SW, GSM850/900)
Checking Flow
TP1
Image
Circuit Diagram
TP1
U1001
TP2
Main
Top
TP2
START
Check TP1 Signal exist?
Check
U1001
NO
Soldering
YES
Check TP2 Signal exist?
Check
U1002
NO
Soldering
YES
Check next step
TP2
TP1