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9-2.RF
9-2-1. GSM 850 Receiver
**Please Check the Main Antenna ,rear, front case, and screws, and then follow the chain below.
If you check the tx chain, Check the not only RF Device but also resistor, inductor and capacitor.
Check L108 = -55dBm ?
Resolder U100 or Change
Continous Rx ON
RF Input : 190 CH
Amplitude : -50dBm
Yes
Normal condition
Catch the channel?
Yes
Yes
Yes
The End
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No
Check Antenna contact
No
Replace RFS102
9-37
Flow Chart of Troubleshooting
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