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Flow Chart of Troubleshooting and Circuit Diagrams
3-36
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2.RF
3-2-1. EGSM Receiver
Rx ON
RF Input : 62Ch
Cell Pwr : -50dBm
YES
Normal condition
Catch the channel
END
Check Intenna Soldering
ANTCON100, ANTCON101
NO
NO
Resolder or change RFSW100
RFSW100(RF Switch)
Pin#1
≥
-60dBm ?
FEM100
Pin#12,13
≥
-60dBm ?
U100
Pin#37,38
≥
-60dBm ?
Check the UCP300
NO
Check or resolder L104, L106,
L122, L123 or U100
FEM100
Pin#9,10 = LOW &
Pin#11 = HIGH ?
Resolder or change FEM100
Check FEM100 control path
YES
YES
YES
YES
NO
NO
YES