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Flow Chart of Troubleshooting
9-33
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9-2-2. Abnormal WCDMA Tx Operation
TX ON
Target
PWR=23dBm
U202 PIN8
≥ 10dBm
U202 PIN10
≥ 8dBm
Resolder RFS200,
L203,C236,L219
DUF300 PIN1
≥ 5dBm
F301 PIN2
≥ 5dBm
U303 PIN8
≥ -15dBm
U201 PIN59
≥ -20dBm
Check U201, UCP400
Check U202
PIN28=H, PIN27=L
PIN1=L
END
Resolder DUF300,
L312, C303,C332
Resolder or change F301,
R317, R302, R303,
R306, R307
Resolder or Change
U303, L310, C339
Resolder or Change
C211, L303, C322, F300,
R313, C304
Check Antenna
Switch Control
Resolder or Change
U202
YES
YES
YES
YES
YES
YES
YES
Check
TX Module Output
Check
TX Module Input
NO
NO
NO
NO
NO
NO
Check
Duplexer Input
Check
Coupler Input
Check
PAM Input
Check
Transceiver Input
