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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
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9-29
9-11. GSM850 Receiver
RX ON
RF input : 190 CH
Amp : -50dBm
F100 Pin 2
>= -65dBm
Yes
Resolder RFS100, C100
No
Yes
Check ANT Switch
control circuit
Check F100
pin3 = L, pin4 = H
pin5 = H, pin6 = L
F100 Pin12, 13
>= -68dBm
No
No
Resolder F100
Yes
Yes
U100
pin 50 >= -70dBm
pin 51 >= -70dBm
Resolder or change
L102,L103,C106
No
Yes
Check all voltage
sources of U100
Is it OK?
No
No
U100 pin 1,3,23
>= 1V
Check & Resolder
CP PMIC(U401)
Resolder U100
Yes
Yes
Check UCP300
END