8-3-9. 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
Normal Condition
Catch the channel?
Check L100,L104>=-55 dBm?
Resolder UCP201 or Change
Yes
Yes
Yes
The End
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No
Check Antenna Contact
No
Replace PAM100
8-23
Level 3 Repair