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Flow Chart of Troubleshooting
9-26. WCDMA 1900 Transmitter
(UE Target Power 24 dBm)
MOD101 Pin 2
MOD101 Pin 22
F105 Pin 6
U103 Pin 9
>= 15dBm
U104 Pin 2
>= 15dBm
U101 Pin 59
>= 15dBm
Check U101
TX ON
>= 15dBm
No
Yes
>= 15dBm
No
>= 15dBm
NO
NO
Yes
NO
END
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Yes
Resolder RFS101,C1024,L101
Check MOD101
Truth Table
Pin 7 : LOW
Pin 6 : LOW
Pin 8 : LOW
Pin 9 : HIGH
YES
Yes
Resolder C176,C177,L123
Yes
Resolder or change F105,C183,C198
Resolder or change
U104
Yes
Resolder or change F104
9-42
Resolder or change
MOD101
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