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Flow Chart of Troubleshooting and Circuit Diagrams
3-38
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3-2-3. DCS Receiver
Rx ON
RF Input : 698Ch
Cell Pwr : -50dBm
YES
Normal condition
Catch the channel
NO
NO
RFSW100(RF Switch)
Pin#3
≥
-60dBm ?
END
Check the UCP300
YES
NO
Check Intenna Soldering
ANTCON100, ANTCON101
Resolder or change RFSW100
FEM100
Pin#9 = LOW &
Pin#10,11 = HIGH ?
Resolder or change FEM100
Check FEM100 control path
NO
YES
U100
Pin#34,34
≥
-60dBm ?
FEM100
Pin#14,15
≥
-60dBm ?
NO
Check & resolder L107, L109,
L110 or U100
YES
YES
YES