Samsung GT-B5510 Service Manual page 57

Level 3 Repair
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
Yes
No
Normal Condition
Check Antenna Contact
Catch the channel?
Yes
No
Check L112 >= -55 dBm? Replace U100
Yes
Resolder U100 or Change
The End
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