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Flow Chart of Troubleshooting
9-74
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9-2-11. Abnormal EGSM Rx Operation
1. Check
FEM Ant
2. Check
FEM output
3. Check
Transceiver input
RX ON
AMP = -50dBm
YES
Resolder RFS100,
L103, C101
F100 PIN20
≥
-60dBm
Check Antenna
Switch Control
Check F100
PIN15=L, PIN14=L
PIN13=H, PIN12=L
NO
YES
F100 PIN3,4
≥
-75dBm
NO
Resolder or Change
F100
NO
YES
Resolder or Change
F100, L107,
L105, L106
RFS100 PIN48,49
≥
-75dBm
YES
NO
Check RFT100,
UCP300
END
PIN12
PIN13
PIN14
PIN15