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Flow Chart of Troubleshooting
9-36
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9-2-3. Abnormal WCDMA Rx Operation
RX ON
AMP=-50dBm
U202 PIN8
≥ -65dBm
U202 PIN10
≥ -70dBm
Resolder RFS200,
L203,C236,L219
DUF300 PIN3
≥ -75dBm
U201 PIN36
≥ -75dBm
U201 PIN34
≥ -75dBm
F200 PIN3,4
≥ -75dBm
Check U201, UCP400
Check U202
PIN28=H, PIN27=L
PIN1=L
END
Resolder DUF300,
L312,C303,C332
Resolder or change
C305, C306, L304
Resolder or Change
U201
Resolder or Change
F200, C241, C237, C243,
C238, C244, L205
Check Antenna
Switch Control
Resolder or Change
U202
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO