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Level 3 Repair
8-30
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8-4-2. GSM900 RX
**If you check the tx chain,
Check the not only RF Device but also resistor, inductor and capacitor.
Continuous Rx ON
RF Input : 62 CH
Amplitude : -50dBm
The End
Check C123 >= -55 dBm?
Normal Condition
Catch the channel?
Yes
Yes
Yes
No
No
Check Antenna Contact
Resolder U101 or Change
Replace U100