LG LG-P970 - Page 124

4. TROUBLE SHOOTING
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Set the phone Rx is On
Check BIAS over 2.85V
Check bias block soldering
No
Yes
Change the board
Check TP1 Signal exist?
Check RF Switch (M/S)
No
Yes
Check TP2 Signal exist?
Check TX Module Refer 1.4
No
Yes
Check TP3 Signal exist?
Check Duplexer
No
Yes
Check TP5 Signal exist?
Check PMB5703 and Rx SAW filter
No
Yes
Yes
Check TP4 Signal exist?
Check LNA
No