LG CU920 Manual page 98

4. TROUBLE SHOOTING
LGE Internal Use Only
Set the Phone Rx is ON
Check Vbias over 2V?
YES
Check TP1
Signal exist?
YES
Check TP2 & TP4
Signal exist?
YES
Check TP3 & TP5
Signal exist?
YES
Check TP7 & TP8
Signal exist?
YES
Rx is OK
Check other Parts
Fig. 4.7.3.3 Check Flow of the WCDMA RX Block
NO Check bias
Block soldering
NO
C heck the RF S/W
NO
Check FEM
NO
Check the Duplexer
FL103 & FL104
NO
Check the RTR6275
IQ signal
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