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Flow Chart of Troubleshooting
9-44
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9-18. WCDMA 1900 Receiver
RX ON
Sector PWR = -50dBm
Resolder C315,C316,L305
Change F200,DUF301,UCP500
F200 Pin 2
>= -60dBm
Check F200
Truth Table
Pin 3 : LOW
Pin 4 : LOW
Pin 5 : HIGH
Pin 6 : HIGH
No
Yes
Resolder RFS200, C200, L201, R221,
,R220
Resolder or change F200
No
F200 Pin 22
>= -70dBm
Yes
DUF301 Pin 6
>= -75dBm
No
Yes
Yes
DUF301 Pin 1
>= -75dBm
Yes
Resolder or change
C320,C329,L307
No