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Flow Chart of Troubleshooting
9-44
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9-2-4. Abnormal WCDMA2100 Tx Operation
TX ON
Target
PWR=23dBm
1. Check
FEM Ant
Resolder RFS100,
L103, C101
F100 PIN20
≥
10dBm
Check Antenna
Switch Control
YES
2. Check
FEM In/Out
Check F100
PIN12=H
NO
F100 PIN18
≥
8dBm
NO
YES
Resolder or Change
F100
3. Check
Duplexer Ant
NO
YES
Resolder
L129, L128
DUF102 PIN2
≥
5dBm
YES
4 .Check
Coupler Input
NO
Resolder or change
CPL102, R118, R112,
R114, R115
CPL102 PIN2
≥
5dBm
YES
5. Check
PAM Output
NO
Resolder or Change
C194, C118, L140, C142
PAM101 PIN8
≥
-15dBm
YES
6. Check
Transceiver Input
NO
Resolder or Change
PAM101, F104, C152,
C148, C113
RFT100 PIN59
≥
-20dBm
YES
NO
Check RFT100,
UCP300
END