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Flow Chart of Troubleshooting
9-26
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9-2-5. DCS1800 Receiver
**If you check the tx chain,
Check the not only RF Device but also resistor, inductor and capacitor.
Continuous RX ON
RF Input : 698 CH
AMP : -50dBm
NORMAL CONDITION
Catch the channel ?
YES
NO
Check L103
≥
-55dBm
?
F102 Check
Pin #6
≥
-55dBm ?
U104 Check
Pin#38,39
≥
-
55dBm ?
Check antenna contact
Replace RFS100
F102 Resolder or Change
THE END
NO
NO
YES
YES
YES
Check the path from F102
to U104
NO