LG KP270 Service Manual page 112

4.18.3 Checking WCDMA Rx part
Set Rx level=-25dBm
Check TP1
About -25.5dBm?
YES
Check TP2
About -27dBm?
YES
Check TP3
About -29dBm?
YES
Change Rx level =-80dBm
Check TP3 level
check TP4 level
>=(TP3 level+15dBm)
YES
Check TP5 level
<=TP4 level-2dBm ?
YES
Rx Still has problem?
NO
Rx Path is OK
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Only for training and service purposes
NO
Check SW501
NO
Check FL501(FEM)
NO
Check FL504(B7684)
NO
Check U506
(BGA711L7)
NO
Check FL502
YES
Check U504 and U103
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4. TROUBLE SHOOTING
LGE Internal Use Only
TP1 TP1
TP2 TP2
TP3 TP3
TP4 TP4
TP5 TP5