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9-2-6. PCS1900 Receiver
RX ON
AMP-50dBm
PAM100 PIN15
≥ -55dBm
YES
PAM100
PIN18
≥ -70dBm
YES
F101 PIN1
≥ -70dBm
YES
U103 PIN17,18
≥ -75dBm
YES
Check U103,
PAM100
END
NO
Resolder RFS100,
NO
NO
Resolder or change
NO
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L116,
L121
Check PAM100
PIN8=L, PIN9=L
PIN10=H
YES
C103,
L118
Check F101
PIN8,
PIN9
≥ -75dBm
YES
9-35
Flow Chart of Troubleshooting
Check Antenna
Switch Control
Resolder or Change
PAM100
Resolder or change
F102
Resolder or change
C120, C122,
L110
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