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Flow Chart of Troubleshooting
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9-27
9-16. DCS Receiver
RX ON
RF input : CH center freq : +67.7kHz
Amp : -50dBm
Yes
F101 Pin10
>= -65dBm
No
Resolder RFS100,C101,L141
Yes
Check ANT Switch
control circuit
F101 pin1,2
>= -68dBm
Check F101
pin11,13,15,16 = L
No
No
Resolder F101
Yes
Yes
Resolder C120,L109,L115
U102
pin 35 >= -74dBm
pin 36 >= -74dBm
No
Yes
Check & Resolder
U102, R138, C114
RF26MHz, RF PSU Part
No
Check U102 pin
23,26,31 >=2.7V
No
U102 pin 7.8.9.10
>= 1V
Resolder U102
Yes
Yes
Check UCP200
END