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Flow Chart of Troubleshooting
9-54
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9-2-7. Abnormal WCDMA2100 Rx Operation
RX ON
AMP = -50dBm
1. Check
FEM Ant
Resolder RFS100,
L103, C101
F100 PIN20
≥
-65dBm
YES
Check Antenna
Switch Control
2. Check
FEM output
PIN12=H
NO
F100 PIN18
≥
-70dBm
YES
NO
Resolder or Change
3. Check
Duplexer Input
NO
YES
Resolder DUF101,
L129, L128
DUF102 PIN2
≥
-75dBm
YES
4. Check
Transceiver Input
NO
Resolder or change
C199, C119, L131
RFT100 PIN36
≥
-75dBm
YES
5. Check
Transceiver Output
NO
Resolder or Change
F102, C167, L120, L119, L122
RFT PIN34
≥
-75dBm
YES
NO
Check RFT100,
UCP300
END