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Flow Chart of Troubleshooting
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7-
27
7-15. DCS Receiver
RX ON
RF input : CH center freq
Amp : -50dBm
U100 Pin8
>= -65dBm
U100 pin1,2
>= -65dBm
U101Pin38>=-70dBm
Pin39>=-70dBm
U101 pin6, 7, 8, 9
>= 1V
R129,R130,R131,
R132 >= 1V
Check U202
END
Resolder CN100, C105
Check U100
pin10=L,pin12=L,pin9=
Check ANT Switch
control circuit
Resolder U100
No
Yes
Resolder C111, C112, L107
Check U101
pin22,28 >= 2.7V
pin4 >= 4.0V
Check & Resolder
RF PSU Part
Check & Resolder
U101, RF26MHz part
R104, R105
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
Yes