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Flow Chart of Troubleshooting
10-25
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10-8. GSM850 Receiver
RX ON
Sector PWR=-50dBm
Resolder or change
F100,L102,L103,C122
Change U100 & UCP200
PAM100 Pin 8
>= -60dBm
Check PAM100
Truth Table
Pin 1 : HIGH
Pin 27 : LOW
Pin 28 : HIGH
No
Yes
Resolder RFS100, C103, R100, L100,
,L101, C111
Resolder or change PAM100
No
PAM100 Pin 4
>= -70dBm
Yes
U100
Pin 50,51
>= -75dBm
No
Yes
Yes