Sharp SGH-J200 - Manual (Page 56)

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Flow Chart of Troubleshooting
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9-25
9-14. GSM Receiver
Yes
C105
>= -65dBm
No
Resolder RFS100,C105,L103
Yes
L117
>= -68dBm
No
No
Resolder U100
or
Check pins related to U100
U100 pin
10, 11, 12, 13
>= 500mV
Yes
Check U100
END
Yes
RX ON
RF input : CH center freq : +67.7kHz
Amp : -50dBm
Resolder F100