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Flow Chart of Troubleshooting
7-14. DCS Receiver
+
RX ON
RF input : CH center freq : +67.7kHz
Amp : -50dBm
Yes
U100 Pin8
>= -65dBm
Yes
U100 pin1,2
>= -68dBm
Yes
U102
pin 35 >= -70dBm
pin 36 >= -70dBm
Yes
U102 pin 7.8.9.10
>= 1V
Yes
Check U200
END
No
Resolder RFS100, C102,C103
No
No
Resolder C121, C122, L106
No
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Check U100
pin10,pin12 = L
Yes
Check U102 pin
23,26,31 >=2.7V
Yes
7-24
No
Check ANT Switch
control circuit
Resolder U100
No
Check & Resolder
U102, R102, R103
RF26MHz, RF PSU Part
Resolder U102
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