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Flow Chart of Troubleshooting
7-
28
7-17. DCS Receiver
Check U200
No
No
Yes
Yes
Yes
Yes
C144,C145
>= 1V
Resolder U102
Check & Resolder
U102,R103,R105,R106
RF26MHz, RF PSU Part
Check U102
pin23,26,28,31
>=2.7V
U102 pin7,8,9,10
>= 1V
END
No
No
No
Yes
Yes
Yes
Resolder C111,C115,L113
Resolder F100
Check ANT Switch
control circuit
U102
pin35 >= -70dBm
pin36 >= -70dBm
F100 pin1, pin2
>= -65dBm
Check F100
pin9,10,12=L
RX ON
RF input : 698CH
Amp : -50dBm
Yes
No
Resolder CN100, C146
F100 pin8
>= -65dBm