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Level 3 Repair
8-29
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8-4-1. GSM850 RX
**If you check the tx chain,
Check the not only RF Device but also resistor, inductor and capacitor.
Resolder U101 or Change
Check Antenna contact
The End
Yes
Yes
No
Replace U100
Check L128
= -55dBm ?
Yes
Normal condition
Catch the channel?
No
Yes
Continuous Rx ON
RF Input : 190 CH
Amplitude : -50dBm