Samsung GT-i8000 Service Manual page 81

9-21. WCDMA 900 Transmitter
(UE Target Power 24 dBm)
F200 Pin 22
DUF300 Pin 6
PAM300 Pin 7
>= 15dBm
PAM300 Pin 4
>= 15dBm
U205 Pin 58
>= 15dBm
Check U205
TX ON
F200 Pin 2
>= 15dBm
No
Yes
>= 15dBm
No
>= 15dBm
NO
NO
Yes
NO
END
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Resolder RFS200, C200, L201, R221,
Yes
Check F200
Truth Table
Pin 7 : LOW
Pin 6 : LOW
Pin 8 : LOW
Pin 9 : HIGH
YES
Yes
Yes
Resolder or change DUF300,L301
Resolder or change
F300
Yes
Resolder or change DUF300
9-53
Flow Chart of Troubleshooting
,R220
Resolder or change
F200
Resolder C303,L300