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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
9-24
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9-2-3. GSM900 Receiver
**If you check the tx chain,
Check the not only RF Device but also resistor, inductor and capacitor.
NORMAL CONDITION
Catch the channel ?
YES
NO
Check L115
≥
-55dBm ?
F103 Check
Pin #3
≥
-55dBm ?
U104 Check
Pin#32,33
≥
-
55dBm ?
Check antenna contact
Replace PAM101
F100 Resolder or Change
THE END
NO
NO
YES
YES
YES
Check the path from F103
to U104
NO
Continuous RX ON
RF Input : 60 CH
AMP : -50dBm