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Flow Chart of Troubleshooting
9-2.RF
9-2-1. GSM900 Receiver
**If you check the RX chain,
Check the not only RF Device but also resistor, inductor and capacitor.
Continuous RX ON
RF Input : 62 CH
AMP : -50dBm
NORMAL CONDITION
Catch the channel ?
YES
Check C104 ≥ -55dBm ?
YES
U103 Check
Pin#1,2 ≥ -55dBm ?
YES
U101 Check
Pin#A2,A3 ≥ -55dBm ?
YES
THE END
NO
NO
NO
NO
SAMSUNG Proprietary-Contents may change without notice
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Check antenna contact
Replace RFS101
Replace U103
Check the path from
U103 to U101
9-21
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