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Flow Chart of Troubleshooting
9-33
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9-2.RF
9-2-1. GSM 850 Receiver
**If you check the tx chain,
Check the not only RF Device but also resistor, inductor and capacitor.
Continous Rx ON
RF Input : 190 CH
Amplitude : -50dBm
Yes
No
Check Antenna contact
Normal condition
Catch the channel?
Yes
Replace RFS101
No
Check L110 = -55dBm ?
Yes
Resolder U100 or Change
Yes
The End