Samsung GT-i8000 Service Manual page 78

Flow Chart of Troubleshooting
9-20. WCDMA 900 Receiver
RX ON
Sector PWR = -50dBm
F200 Pin 2
>= -60dBm
Yes
F200 Pin 21
>= -70dBm
Yes
DUF300 Pin 6
>= -75dBm
Yes
DUF300 Pin 1,8
>= -75dBm
Yes
Change F200,DUF300,UCP500
No
No
No
No
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Resolder RFS200, C200, L201, R221,
,R220
Check F200
Truth Table
Pin 3 : LOW
Pin 4 : HIGH
Pin 5 : LOW
Pin 6 : HIGH
Resolder C303,L300
Resolder or change
C304,C308,L302,L303
9-50
Yes
Resolder or change F200