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Flow Chart of Troubleshooting
9-22
9-14. DCS Receiver
Check F100
pin10,pin12 = L
Check UCP201
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Resolder U101
Check & Resolder
U100, R113
RF26MHz, RF PSU Part
U101 pin 23,26,31
>=2.8V
Resolder C117, C118, L106
Resolder F100
Check ANT Switch
control circuit
U101
pin 35 >= -70dBm
pin 36 >= -70dBm
U101 pin 7,8,9,10
>= 1V
F100 1,2
>= -68dBm
RX ON
RF input : CH center freq : +67.7kHz
Amp : -50dBm
Yes
No
END
Resolder RFS100,C101
F100 Pin8
>= -65dBm