Samsung GT-B5510 Service Manual page 58

8-4-3. DCS/PCS RX
**If you check the tx chain,
Check the not only RF Device but also resistor, inductor and capacitor.
Continous Rx ON
RF Input : 698 CH
Amplitude : -50dBm
Normal Condition
Catch the channel?
Check L120 L124
>= -55 dBm?
Resolder U100 or Change
Yes
Yes
Yes
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No
Check Antenna Contact
No
Replace U100
8-29
Level 3 Repair