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Flow Chart of Troubleshooting
10-53
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10-2-6. WCDMA900 RX
RX ON
AMP=-50dBm
YES
Re-solder CN101,
C101, L102
U101 PIN17
≥
-65dBm
Check Antenna
Switch Control
NO
Check U101
PIN6=H, PIN7=L
PIN8=L , PIN9=H
YES
U101 PIN20
≥
-70dBm
Re-solder or Change
U101
NO
YES
Re-solder F107,
C132, L114
F107 PIN3
≥
-75dBm
YES
NO
Re-solder or change
R224, R225, C261, L208
,L207, C283
U201 PIN30,31
≥
-75dBm
YES
NO
Re-solder or Change
U201
U201 PIN34
≥
-75dBm
YES
NO
Check U201, UCP301
END
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